# UV Light Sensor, VEML6070, Digital, 16 Bit, I2C, 2.7 Vdc to 5.5 Vdc

![Product image](https://novapart.co/image/farnell:2504137/)

**URL**: https://novapart.co/products/VEML6070/uv-light-sensor-veml6070-digital-16-bit-i2c-27-vdc
**SKU**: VEML6070
**Manufacturer**: VISHAY
**Category**: Sensors & Transducers || Sensors || Light Sensors || Optical / Slot Photoelectric Sensors
**Price**: €0.9130
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Sensor Output | Digital |
| Supply Voltage Dc Max | 5.5V |
| Supply Voltage Dc Min | 2.7V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2504137/)

**VEML6070** 

Vishay Semiconductors 

www.vishay.com 

## **UV A Light Sensor with I[2] C Interface** 

## **FEATURES** 

- Package type: surface mount 

- Dimensions (L x W x H in mm): 2.35 x 1.8 x 1.0 

- Integrated modules: ultraviolet sensor (UV), and signal conditioning IC 

- Converts solar UV light intensity to digital data 

- Excellent UV sensitivity and linearity via Filtron[TM] technology 

- Excellent performance of UV radiation measurement under long time solar UV exposure 

- Excellent temperature compensation 

## **DESCRIPTION** 

VEML6070 is an advanced ultraviolet (UV) light sensor with I[2] C protocol interface and designed by the CMOS process. It is easily operated via a simple I[2] C command. The active acknowledge (ACK) feature with threshold windows setting allows the UV sensor to send out a UVI alert message. Under a strong solar UVI condition, the smart ACK signal can be easily implemented by the software programming. 

VEML6070 incorporates a photodiode, amplifiers, and analog / digital circuits into a single chip. VEML6070’s adoption of Filtron[TM] UV technology provides the best spectral sensitivity to cover UV spectrum sensing. It has an excellent temperature compensation and a robust refresh rate setting that does not use an external RC low pass filter. VEML6070 has linear sensitivity to solar UV light and is easily adjusted by an external resistor. Software shutdown mode is provided, which reduces power consumption to be less than 1 μA. VEML6070’s operating voltage ranges from 2.7 V to 5.5 V. 

- High dynamic detection resolution 

- Standard I[2] C protocol interface 

- Support acknowledge feature (ACK) 

- Immunity on fluorescent light flicker software shutdown mode control 

- Package: OPLGA 

- Temperature compensation: -40 °C to +85 °C 

- Floor life: 168 h, MSL 3, according to J-STD-020 

- Output type: I[2] C bus 

- Operation voltage: 2.7 V to 5.5 V 

- Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 

## **APPLICATIONS** 

- Solar UV indicator 

- Cosmetic / outdoor sport handheld product 

- Consumer products 

## **PRODUCT SUMMARY** 

|**PRODUCT SUMMARY**|**PRODUCT SUMMARY**|**PRODUCT SUMMARY**|**PRODUCT SUMMARY**|**PRODUCT SUMMARY**|**PRODUCT SUMMARY**|
|---|---|---|---|---|---|
|**PART NUMBER**|**OPERATING**<br>**VOLTAGE RANGE**<br>**(V)**|**I2C BUS**<br>**VOLTAGE RANGE**<br>**(V)**|**PEAK SENSITIVITY**<br>**(nm)**|**RANGE OF SPECTRAL**<br>**BANDWIDTH**λ**0.5**<br>**(nm)**|**OUTPUT CODE**|
|VEML6070|2.7 to 5.5|1.7 to 5.5|355|± 20|16 bit, I2C|



## **Note** 

- (1) Adjustable through I2C interface 

## **ORDERING INFORMATION** 

|**ORDERING CODE**|**PACKAGING**|**VOLUME(1)**|**REMARKS**|
|---|---|---|---|
|VEML6070|Tape and reel|MOQ: 2500 pcs|2.35 mm x 1.8 mm x 1.0 mm|



## **Note** 

- (1) MOQ: minimum order quantity 

|**ABSOLUTE MAXIMUM RATINGS**(Tamb= 25 °C,unless otherwise specified)|**ABSOLUTE MAXIMUM RATINGS**(Tamb= 25 °C,unless otherwise specified)|**ABSOLUTE MAXIMUM RATINGS**(Tamb= 25 °C,unless otherwise specified)|**ABSOLUTE MAXIMUM RATINGS**(Tamb= 25 °C,unless otherwise specified)|**ABSOLUTE MAXIMUM RATINGS**(Tamb= 25 °C,unless otherwise specified)|**ABSOLUTE MAXIMUM RATINGS**(Tamb= 25 °C,unless otherwise specified)|
|---|---|---|---|---|---|
|**PARAMETER**|**TEST CONDITION**|**SYMBOL**|**MIN.**|**MAX.**|**UNIT**|
|Supply voltage||VDD|0|6.0|V|
|Operation temperature range||Tamb|-40|+85|°C|



Rev. 1.6, 31-Jul-15 **1** 

Document Number: 84277 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

Vishay Semiconductors 

**==> picture [59 x 48] intentionally omitted <==**

www.vishay.com 

|**RECOMMENDED OPERATING CONDITIONS**(Tamb= 25 °C,unless otherwise specified)|**RECOMMENDED OPERATING CONDITIONS**(Tamb= 25 °C,unless otherwise specified)|**RECOMMENDED OPERATING CONDITIONS**(Tamb= 25 °C,unless otherwise specified)|**RECOMMENDED OPERATING CONDITIONS**(Tamb= 25 °C,unless otherwise specified)|**RECOMMENDED OPERATING CONDITIONS**(Tamb= 25 °C,unless otherwise specified)|**RECOMMENDED OPERATING CONDITIONS**(Tamb= 25 °C,unless otherwise specified)|
|---|---|---|---|---|---|
|**PARAMETER**|**TEST CONDITION**|**SYMBOL**|**MIN.**|**MAX.**|**UNIT**|
|Supply voltage||VDD|2.7|5.5|V|
|Operation temperature range||Tamb|-40|+85|°C|
|I2C bus operatingfrequency||f(I2CCLK)|10|400|kHz|



## **PIN DESCRIPTIONS** 

|**PIN DESCRIPTIONS**|**PIN DESCRIPTIONS**|**PIN DESCRIPTIONS**|**PIN DESCRIPTIONS**|
|---|---|---|---|
|**PIN ASSIGNMENT**|**SYMBOL**|**TYPE**|**FUNCTION**|
|1|GND|I|Power supplyground, all voltage are reference to GND|
|2|ACK|O (open drain)|Acknowledge pin|
|3|SDA|I / O (open drain)|I2C digital serial data output to the host|
|4|SET||Light readingadjustment, connect a resistor to GND|
|5|SCL|I|I2C digital serial clock input from the host|
|6|VDD|I|Supply voltage|



## **BLOCK DIAGRAM** 

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**----- Start of picture text -----**<br>
VEML6070<br>GND 1 Temperature  6 VDD<br>sensor<br>UV-PD<br>Low pass<br>filter<br>ACK 2 5 SCL<br>Timing<br>controller<br>SDA 3 4 RSET<br>Oscillator<br>Output buffer2C interfaceI<br>**----- End of picture text -----**<br>


|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**BASIC CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|
|---|---|---|---|---|---|---|---|
|**PARAMETER**||**TEST CONDITION**|**SYMBOL**|**MIN.**|**TYP.**|**MAX.**|**UNIT**|
|Supply operation voltage|||VDD|2.7|-|5.5|V|
|Supply current||RSET= 240 kΩ (1)(2)|IDD|-|100|250|μA|
|I2C signal input|Logic high|(1)(2)|VIH|1.5|-|VDD|V|
||Logic low||VIL|-|-|0.8||
|Peak sensitivity wavelength|||λp|-|355|-|nm|
|Range of spectral sensitivity|||λ0.1|320|-|410|nm|
|UVA sensitivity||RSET= 240 kΩ, IT= 1T(3)||-|5|-|μW/cm2/step|
|Maximum UVA detection power||RSET= 240 kΩ, IT= 1T(3)||-|-|328|mW/cm2|
|Dark offset||RSET= 240 kΩ, IT= 1T(1)||0|1|5|steps|
|Output offset||RSET= 240 kΩ, IT= 1T(1)(4)||-|2|-|steps|
|Shutdown current||Light condition = dark(1)|IDD|-|1|15|μA|



## **Notes** 

- (1) Test condition: VDD = 3.3 V, temperature: 25°C 

- (2) Light source: solar light source 

- (3) Test using 365 nm UVA LED 

- (4) Ambient light intensity = 500 lx 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**2** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

Vishay Semiconductors 

**==> picture [59 x 48] intentionally omitted <==**

www.vishay.com 

|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**I2C TIMING CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|
|---|---|---|---|---|---|---|
|**PARAMETER**|**SYMBOL**|**STANDARD MODE**||**FAST MODE**||**UNIT**|
|||**MIN.**|**MAX.**|**MIN.**|**MAX.**||
|Clock frequency|f(SMBCLK)|10|100|10|400|kHz|
|Bus free time between start and stop condition|t(BUF)|4.7|-|1.3|-|μs|
|Hold time after (repeated) start condition;<br>after this period, the first clock isgenerated|t(HDSTA)|4.0|-|0.6|-|μs|
|Repeated start condition setup time|t(SUSTA)|4.7|-|0.6|-|μs|
|Stop condition setup time|t(SUSTO)|4.0|-|0.6|-|μs|
|Data hold time|t(HDDAT)||3450|-|900|ns|
|Data setup time|t(SUDAT)|250|-|100|-|ns|
|I2C clock (SCK) low period|t(LOW)|4.7|-|1.3|-|μs|
|I2C clock (SCK) high period|t(HIGH)|4.0|-|0.6|-|μs|
|Detect clock / data low timeout|t(TIMEOUT)|25|35|-|-|ms|
|Clock / data fall time|t(F)|-|300|-|300|ns|
|Clock / data rise time|t(R)|-|1000|-|300|ns|



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t [(LOW)] t [(R)] t [(F)]<br>I [2] C Bus  VIH<br>CLOCK<br>(SCL) VIL<br>t [(HDSTA)] t [(HIGH)] t [(SUSTA)]<br>t [(SUSTO)]<br>t [(BUF)] t [(HDDAT] t [(SUDAT]<br>) )<br>I [2] C Bus  VIH<br>DATA<br>(SDA) VIL<br>P S S P<br>Stop Condition Start Condition<br>Start Stop<br>t(LOSEXT)<br>SCLACK SDAACK<br>t(LOWMEXT) t(LOWMEXT) t(LOWMEXT)<br>I [2] C Bus<br>CLOCK<br>(SCL)<br>I [2] C Bus<br>DATA<br>(SDA)<br>Fig. 1 - I [2] C Timing Diagram<br>{ { { {<br>**----- End of picture text -----**<br>


Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**3** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

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www.vishay.com 

## Vishay Semiconductors 

## **PARAMETER TIMING INFORMATION** 

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**----- Start of picture text -----**<br>
I [2] C Bus<br>CLOCK<br>(SCL)<br>I [2] C Bus<br>DATA SA7 SA6 SA5 SA4 SA3 SA2 SA1 W DA7 DA7 DA5 DA4 DA3 DA2 DA1 DA0<br>(SDA)<br>Start by  ACK by ACK by Stop by<br>Master VEML6070 VEML6070 Master<br>I [2] C Bus Slave Address Byte Command Byte<br>**----- End of picture text -----**<br>


Fig. 2 - Timing for Send Byte Command Format 

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**----- Start of picture text -----**<br>
I [2] C Bus<br>CLOCK<br>(SCL)<br>I [2] C Bus<br>DATA SA7 SA6 SA5 SA4 SA3 SA2 SA1 R DA7 DA6 DA5 DA4 DA3 DA2 DA1 DA0<br>(SDA)<br>Start by  ACK by ACK by Stop by<br>Master VEML6070 Master Master<br>I [2] C Bus Slave Address Byte VEML6070 Data Byte<br>**----- End of picture text -----**<br>


Fig. 3 - I[2] C Timing for Receive Byte Command Format 

## **TYPICAL PERFORMANCE CHARACTERISTICS** (Tamb = 25 °C, unless otherwise specified) 

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Axis Title<br>100 10000 View Angle OPLGA package<br>90<br>1.1<br>80 1<br>70 1000 0.9<br>60 0.8<br>50 0.7<br>0.6 VEML6070<br>40 0.5 Ideal Cosine<br>100<br>30 0.4<br>20 0.3<br>10 0.2<br>0.1<br>0 10 0<br>300 350 400 450 500 550 600<br>λ - Wavelength (nm) View Angle<br>2nd line<br>2nd line 1st line 2nd line<br>Normalized Output (%) Normalized Output<br>-90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90<br>**----- End of picture text -----**<br>


Fig. 4 - Normalized Spectral Response 

Fig. 5 - Normalized Output vs. View Angle 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**4** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

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www.vishay.com<br>**----- End of picture text -----**<br>


## Vishay Semiconductors 

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**----- Start of picture text -----**<br>
CM3512 Refresh Time<br>Temperature vs. IDD 500<br>475<br>450<br>125 425<br>400<br>375<br>115 350325<br>300<br>105 275250<br>225<br>200<br>95 175<br>150<br>125<br>85 100<br>75<br>50<br>75 25<br>0<br>10 20 30 40 50 60 70 80 90 100 110<br>Temperature<br>Rset (Kohm)<br>Fig. 6 - IDD vs.Temperature Fig. 7 - Refresh Time<br>IDD (uA) Time (ms)<br>0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200<br>**----- End of picture text -----**<br>


## **APPLICATION INFORMATION** 

## **Pin Connection with the Host** 

VEML6070 is a cost effective solution for ultraviolet light sensing with I[2] C interface. The standard serial digital interface easily accesses “UV light intensity” digital data. 

The additional capacitor near the VDD pin is used for power supply noise rejection. For the I[2] C bus design, the pull-up voltage refers to the I/O of the baseband due to the “open drain” design. The pull-up resistors for the I[2] C bus design are recommended to be 2.2 kΩ. The circuit diagram as an example is shown in figure 8. 

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**----- Start of picture text -----**<br>
1.7 V to 5.5 V<br>R1 R2 R3<br>GND  (1) Host<br>2.7 V to 5.5 V R4 Micro Controller<br>C1 C2 VDD (6)<br>10R<br>10 μF 100 nF VEML6070<br>SDA (3) I [2] C Bus Data SDA<br>C1 and R4<br>are optional  R5 SCL (5) I [2] C Bus Clock SCL<br>for very<br>disturbed RSET (4) ACK (2) GPIO (INT)<br>supply 270K<br>**----- End of picture text -----**<br>


Fig. 8 - Hardware Pin Connection Diagram 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**5** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

Vishay Semiconductors 

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**==> picture [77 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
www.vishay.com<br>**----- End of picture text -----**<br>


## **Digital Interface** 

VEML6070 contains a 8-bit command register written via the I[2] C bus. All operations can be controlled by the command register. The simple command structure enables users to easily program the operation setting and latch the light data from VEML6070. In figure 9, VEML6070 I[2] C command format description for reading and writing operation between the host and VEML6070 are shown. The white sections indicate host activity and the gray sections indicate VEML6070’s acknowledgement of the host access activity. 

**==> picture [318 x 157] intentionally omitted <==**

**----- Start of picture text -----**<br>
Receive byte → read data from UVS<br>S Slave address Rd A Light data (1 byte) A P<br>Send byte → write command to UVS<br>S Slave address Wr A Command (1 byte) A P<br>S = start condition<br>P = stop condition<br>A = acknowledge<br>Shaded area = VEML6070 acknowledge<br>Fig. 9 - VEML6070 Command Protocol<br>**----- End of picture text -----**<br>


## **Slave Address and Function Description** 

The VEML6070 has one slave address used for write functions (command) and two slave addresses used for read functions (UV data LSB and MSB). 

The 7-bit address for write functions is 38h = 0111000 **x** resulting in a 70h = 0111000 **0** 8-bit address. The 7-bit addresses for read functions are 38h = 0111000 **x** for the UV Data LSB and 39h = 0111001 **x** for the UV data MSB. This results in a 71h = 0111000 **1** and 73h = 0111001 **1** 8-bit address, respectively. The 7-bit address 39h should not be used for a write function. 

## **Command Register Format** 

VEML6070 provides a command to set device operations and sensitivity adjustment. This command is 8-bit long and includes 4 parameter groups for programming. The command format descriptions and register setting explanations are shown in tables 1 and 2. 

## **TABLE 1 - COMMAND REGISTER BITS DESCRIPTION** 

|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|**TABLE 1 - COMMAND REGISTER BITS DESCRIPTION**|
|---|---|---|---|---|---|---|---|
|**COMMAND FORMAT**||||||||
|Reserved||ACK|ACK_THD|IT||Reserved|SD|
|Bit 7|Bit 6|Bit 5|Bit 4|Bit 3|Bit 2|Bit 1|Bit 0|
|0|0|ACK|THD|IT1|IT0|1|SD|
|**DESCRIPTION**||||||||
|Reserved||Reserved||||||
|ACK||Acknowledge activity setting||||||
|ACK_THD||Acknowledge threshold window settingfor byte mode usage||||||
|IT||Integration time setting||||||
|SD||Shutdown mode setting||||||



Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**6** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

Vishay Semiconductors 

**==> picture [59 x 48] intentionally omitted <==**

www.vishay.com 

## **TABLE 2 - REGISTER TABLE SETTING** 

|**TABLE 2 - REGISTER TABLE SETTING**|**TABLE 2 - REGISTER TABLE SETTING**|**TABLE 2 - REGISTER TABLE SETTING**|**TABLE 2 - REGISTER TABLE SETTING**|**TABLE 2 - REGISTER TABLE SETTING**|
|---|---|---|---|---|
|**BITS SETTING**|**DESCRIPTION**||**BITS SETTING**|**DESCRIPTION**|
|Reserved|Set initial value to (0 : 0)||(IT1 : IT0)(1)|(0 : 0) = ½T<br>(0 : 1) = 1T<br>(1 : 0) = 2T<br>(1 : 1) = 4T|
|ACK|0 = disable||Reserved|Set initial value to 1|
||1 = enable||||
|ACK_THD|0 = 102 steps||SD|0 = disable|
||1 = 145 steps|||1 = enable|



## **Note** 

- (1) Please refer to table 4, “Example of Refresh Time and RSET Value Relation” 

## **Data Access** 

VEML6070 has 16-bit resolution to give high resolution for light intensity sensing. Examples of the application setting are shown in table 3. 

|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|**TABLE 3 - DATA ACCESS DESCRIPTION**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||VEML6070 16-BIT DATA BUFFER||||||||||||||||||
|Data bit|15||14|13|12|11|10|9|8||7|6|5|4|3|2|1|0|
|Sequence 1|||||||||||||||||||
|Sequence 2|||||||||||||||||||



## **Notes** 

- Slave addresses (8 bits) for data read: 0x71 and 0x73 

- Data reading sequence for the host: 

   - -Set read command to 0x73, read MSB 8 bits of 16 bits light data (sequence 1) 

   - -Set read command to 0x71, read LSB 8 bits of 16 bits light data for completing data structure (sequence 2) 

## **Initialization** 

VEML6070 needs to be initialized while the system’s power is on. The initialization includes two major steps: (1) clear ACK state of UVS and (2) fill the initial value, 06 (HEX), into the 0x70 addresses. After the initialization is completed, VEML6070 can be programmable for operation by write command setting from the host. VEML6070 initialization is recommended to be completed within 150 ms. 

## **Acknowledge Activity** 

VEML6070 provides a function for sending an acknowledge signal (ACK) to the host when the value of sensed UV light is over the programmed threshold (ACK_THD) value. The purpose of the ACK signal is similar to the interrupt feature which informs the host once the sensed data level goes beyond the interrupt threshold setting. VEML6070 has two ACK threshold values, 102 steps and 145 steps. 

There are two methods of driving acknowledge condition and read / write command to VEML6070: 

- (1) If the host implements the INT function, it performs a modified received byte operation to disengage VEML6070’s acknowledge signal and acknowledge alert response address (ARA), 0x18 (Hex). A command format for responses to an ARA is shown in figure 10. 

S ARA (0x18) Rd A UVS Slave Address A P 

Fig. 10 - Command Format for Responds to an ARA 

- (2) If the host does not implement this feature, it should periodically access the ARA or read ARA before setting each read / write command. 

The behavior of an ACK signal is similar to the INT definition in I[2] C specification. For the hardware circuit design, this pin connects to an INT pin or GPIO pin of the MCU. The threshold ACK_THD definition is based on the sensitivity setting of VEML6070. 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**7** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

Vishay Semiconductors 

**==> picture [59 x 48] intentionally omitted <==**

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The ACK or UVI interrupt function allows the UVI sensing system to perform data pooling based on the interrupt event. The system sensor manager does not need to do continual data pooling and this significantly reduced the MCU loading. The ACK signal can also be used as a trigger event for popping up a warning UVI message. 

## **Refresh Time Determination** 

VEML6070’s refresh time can be determined by the RSET value. Cooperating with the command register setting, the designer has a flexible way of defining the timing for light data collection. The default refresh time is 1T, (IT1 : IT0) = (0 : 1). If the RSET value is changed, the default timing changes and the other parts in the register table also change by comparing itself with the default timing (refer to figure 7). 

Table 4 is an example of two RSET resistors that show the timing table that the system designer can use a flexible way to determine the desired refresh time. 

|**TABLE 4 - EXAMPLE OF REFRESH TIME AND RSET VALUE RELATION**|**TABLE 4 - EXAMPLE OF REFRESH TIME AND RSET VALUE RELATION**|**TABLE 4 - EXAMPLE OF REFRESH TIME AND RSET VALUE RELATION**|**TABLE 4 - EXAMPLE OF REFRESH TIME AND RSET VALUE RELATION**|
|---|---|---|---|
|**REGISTER**|**SETTING**|**REFRESH TIME**||
|||**RSET = 300 k**Ω|**RSET = 600 k**Ω|
|(IT1 : IT0)|(0 : 0) = ½T|62.5 ms|125 ms|
||(0 : 1) = 1T|125 ms|250 ms|
||(1 : 0) = 2T|250 ms|500 ms|
||(1 : 1) = 4T|500 ms|1000 ms|



The designer can decide the refresh timing range requirement first, then choose an appropriate RSET value for the timing range, and then write the correct value for the system application via I[2] C protocol. 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**8** For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

www.vishay.com 

## Vishay Semiconductors 

## **PACKAGE INFORMATION** in millimeters 

## **TOP VIEW** 

## **SIDE VIEW** 

## **BOTTOM VIEW** 

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2.35 ± 0.15<br>0.075 min.<br>0.1<br>Pin 1 Marking<br>: 1 6<br>LY | | LN : t=] mi<br>0.28<br>3 4<br>O O += | __<br>0.3 ± 0.1 0.45 ± 0.1<br>VEML6070 pin-out assignment<br>1 GND 6 VDD<br>2 ACK 5 SCL<br>3 SDA 4 SET<br>Unit: mm<br>0.15 min.<br>0.6<br>1.80 ± 0.15<br>0.4 ± 0.1<br>0.20<br>1.0 ± 0.1<br>0.56<br>**----- End of picture text -----**<br>


Fig. 11 - VEML6070 A3OP Package Dimensions 

## **LAYOUT NOTICE** 

**==> picture [228 x 161] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.25 mm<br>| — "<br>0.4 mm<br>0.6 mm<br>1.0 mm 0.45 mm<br>**----- End of picture text -----**<br>


Fig. 12 - VEML6070 OPLGA PCB Layout Footprint 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**9** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

**==> picture [59 x 48] intentionally omitted <==**

www.vishay.com 

## Vishay Semiconductors 

## **APPLICATION CIRCUIT BLOCK REFERENCE** 

**==> picture [426 x 169] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.7 V to 5.5 V<br>R1 R2 R3<br>GND  (1) Host<br>2.7 V to 5.5 V R4 Micro Controller<br>C1 C2 VDD (6)<br>10R<br>10 μF 100 nF VEML6070<br>SDA (3) I [2] C Bus Data SDA<br>C1 and R4<br>are optional  R5 SCL (5) I [2] C Bus Clock SCL<br>for very<br>disturbed RSET (4) ACK (2) GPIO (INT)<br>supply 270K<br>**----- End of picture text -----**<br>


Fig. 13 - VEML6070 Application Circuit 

## **Notes** 

- VDD range: 2.7 V to 5.5 V 

- The pull-up voltage for I[2] C bus is referring to the I/O specification of baseband 

## **RECOMMENDED STORAGE AND REBAKING CONDITIONS** 

|**RECOMMENDED STORAGE AND REBAKING CONDITIONS**|**RECOMMENDED STORAGE AND REBAKING CONDITIONS**|**RECOMMENDED STORAGE AND REBAKING CONDITIONS**|**RECOMMENDED STORAGE AND REBAKING CONDITIONS**|**RECOMMENDED STORAGE AND REBAKING CONDITIONS**|
|---|---|---|---|---|
|**PARAMETER**|**CONDITIONS**|**MIN.**|**MAX.**|**UNIT**|
|Storage temperature||5|50|°C|
|Relative humidity||-|60|%|
|Open time|Rebakingprocess should be done when aluminized envelope reopened|-|-||
|Total time|From the date code on the aluminized envelope (unopened)|-|6|months|
|Rebaking|Tape and reel: 60 °C|-|22|h|
||Tube: 60 °C|-|22|h|



## **RECOMMENDED INFRARED REFLOW** 

Soldering conditions are based on J-STD-020 C definition. 

1. After opening the tape and reel, IR reflow process should be done 

2. IR reflow profile conditions 

## **IR REFLOW PROFILE CONDITION** 

|**IR REFLOW PROFILE CONDITION**|**IR REFLOW PROFILE CONDITION**|**IR REFLOW PROFILE CONDITION**|**IR REFLOW PROFILE CONDITION**|
|---|---|---|---|
|**PARAMETER**|**CONDITIONS**|**TEMPERATURE**|**TIME**|
|Peak temperature||255 °C + 0 °C / - 5 °C (max.: 260 °C)|10 s|
|Preheat temperature range and timing||150 °C to 200 °C|60 s to 180 s|
|Timingwithin 5 °C to peak temperature||-|10 s to 30 s|
|Timingmaintained above temperature / time||217 °C|60 s to 150 s|
|Timing from 25 °C to peak temperature||-|8 min (max.)|
|Ramp-up rate||3 °C/s (max.)|-|
|Ramp-down rate||6 °C/s (max.)|-|



3. Recommend Normal Solder Reflow is 235 °C to 255 °C 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**10** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

**==> picture [59 x 48] intentionally omitted <==**

www.vishay.com 

## Vishay Semiconductors 

**==> picture [388 x 212] intentionally omitted <==**

**----- Start of picture text -----**<br>
Max. Temperature<br>(260 °C + 5 °C / - 5 °C)/10 s<br>255<br>Ramp-Up Rate Ramp-Down Rate<br>217 3 °C/s (max.) 6 °C/s (max.)<br>200 Soldering Zone<br>60 s to 150 s<br>Ramp-Up Rate<br>150 3 °C/s (max.)<br>Pre-Heating Time<br>t2 - t1 = 60 s to 180 s<br>t1 t2 Time (s)<br>Temperature (°C)<br>**----- End of picture text -----**<br>


Fig. 14 - VEML6070 A3OP Solder Reflow Profile Chart 

## **RECOMMENDED IRON TIP SOLDERING CONDITION AND WARNING HANDLING** 

1. Solder the device with the following conditions: 

   - 1.1. Soldering temperature: 400 °C (max.) 

   - 1.2. Soldering time: 3 s (max.) 

2. If the temperature of the method portion rises in addition to the residual stress between the leads, the possibility that an open or short circuit occurs due to the deformation or destruction of the resin increases. 

3. The following methods: VPS and wave soldering, have not been suggested for the component assembly. 

4. Cleaning method conditions: 

   - 4.1. Solvent: methyl alcohol, ethyl alcohol, isopropyl alcohol 

   - 4.2. Solvent temperature < 45 °C (max.) 

   - 4.3. Time: 3 min (min.) 

Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**11** 

For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**VEML6070** 

www.vishay.com 

## Vishay Semiconductors 

## **TAPE PACKAGING INFORMATION** in millimeters 

**==> picture [236 x 179] intentionally omitted <==**

**----- Start of picture text -----**<br>
SS DIMENSION OF CARRIER TAPE<br>SIDE VIEW<br>TOP VIEW 4.00 ± 0.10 4.00 ± 0.10<br>Ф 1.50 ± 0.10 |<br>2.00 ± 0.10<br>® eof e 6 ent<br>cence’<br>‘Deuoe: UNIT: mm<br>R 9 Max R 9 Max<br>2.03 ± 0.10 2.58 ± 0.10<br>Fig. 15 - VEML6070 A3OP Package Carrier Tape<br>0.28 ± 0.02<br>12.00 +0.30 / -0.10 5.50 ± 0.10 1.75 ± 0.10<br>1.25 ± 0.10<br>**----- End of picture text -----**<br>


**==> picture [12 x 4] intentionally omitted <==**

**----- Start of picture text -----**<br>
PIN 1<br>**----- End of picture text -----**<br>


Fig. 16 - Taping Direction 

**==> picture [88 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 17 - Reel Dimension<br>**----- End of picture text -----**<br>


Rev. 1.6, 31-Jul-15 

Document Number: 84277 

**12** For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**Legal Disclaimer Notice** Vishay 

www.vishay.com 

**==> picture [59 x 48] intentionally omitted <==**

## **Disclaimer** 

ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. 

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. 

Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product.  To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. 

Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications.  Such statements are not binding statements about the suitability of products for a particular application.  It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time.  All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts.  Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. 

Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. 

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.  Product names and markings noted herein may be trademarks of their respective owners. 

Revision: 13-Jun-16 

Document Number: 91000 

**1** 



## Links

- [View this product on Novapart](https://novapart.co/products/VEML6070/uv-light-sensor-veml6070-digital-16-bit-i2c-27-vdc)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/en-ES/vishay/veml6070/sensor-uv-light-5-5v-16bit-digital/dp/2504137)
---

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