NPI-19A-200A2

## NPI-19 Series Digital Pressure Sensor I[2] C 

## **Applications** 

- Industrial process control 

- Corrosive fluid and gas measurement 

## **Features** 

   - No port or threaded process fittings 

   - Linearity: ±0.25% FSO (BFSL) 

- Hydraulic systems and valves 

   - Total Error Band: ±1% FSO 

- Tank level measurement 

   - I[2] C interface protocols 

- Barometric pressure measurement 

   - 14-bit I[2] C output 

- Ship and marine systems 

   - Absolute and gauge pressure 

- Aircraft and avionic systems 

- Medical equipment 

- Pressure Ranges: 2.5 psi (17 kPa) to 300 psi (2068 kPa) 

**Amphenol Advanced Sensors** 

## NPI-19 Series - Specifications 

Pressure Output: 

- 10% to 90% VDD 

Device Address: 

- I[2] C (Addr 0x28H) 

Supply Voltage: 

- 3.3V 

Linearity: 

- ±0.25% FSO 

Total Error Band: 

- ±1% FSO 

Over Pressure: 

- 2X 

## Long Term Stability: 

- ± 0.5% span / year typical 

## Operating Temperature: 

- -40°C to 125°C 

Storage Temperature: 

- -40°C to 125°C 

Burst Pressure: 

- 3X 

NPI-19M Dimensions (mm) 

## Sensor Output 

|Sensor Output||||
|---|---|---|---|
|Parameters<br>Applied Pressure Pmin|Typical<br>1638|Units<br>Decimal count|Notes<br>666 Hex count|
|Applied Pressure Pmax|14745|Decimal count|399A Hex count|



**2  |** NovaSensor NPI-19 Series 

## NPI-19 Series - Specifications (Cont.) 

## Absolute Maximum Ratings 

**==> picture [485 x 31] intentionally omitted <==**

**----- Start of picture text -----**<br>
Limits<br>Symbol Parameter Unit<br>Min Typical Max<br>**----- End of picture text -----**<br>


|Symbol|Parameter|Limits|Limits|Limits|Unit|
|---|---|---|---|---|---|
|||Min|Typical|Max||
|||||||
|Vdd|Supply Voltage|2.5|3.3|5.5|V|
|P|Over Pressure (Rated Pressure)|-|2X|-|-|
|VHBM1|Electrostatic Discharge Tolerance – Human<br>Body Model|-|-|4|kV|
|TSTOR|Storage Temperature|-40|-|125|°C|



## Performance Specifications 

Unless otherwise specified: Supply Voltage: 3.3 VDC, Ambient Temperature: 25°C 

**==> picture [483 x 18] intentionally omitted <==**

**----- Start of picture text -----**<br>
Parameters Min Typical Max Units Notes<br>**----- End of picture text -----**<br>


|Parameters|Min|Typical|Max|Units|Notes|
|---|---|---|---|---|---|
|Zero Output(10%~90%)||1638||Decimal counts|1|
|Full-Scale Pressure Output 10%~90%)||14745||Decimal counts|1|
|Pressure Linearity|-0.25||0.25|%FSO|2|
|Total Error Band|-1||1|%FSO|2|
|Pressure Resolution||0.008||%FSO|3|
|SupplyCurrent||3||mA||
|Insulation Resistance(@50 VDC)|100|||MΩ|4|
|Overpressure|||2X|Ratedpressure||
|Load Resistance|10|||KΩ||
|Long-Term Stability||0.5||%FSO/year||
|Compensated Temperature( ≤35 kPa)|0||50|°C||
|Compensated Temperature( ≥100 kPa)|-20||85|°C||
|OperatingTemperature( ≤35 kPa)|-10||80|°C|5|
|OperatingTemperature(≥100 kPa)|-40||125|°C|5|
|Start Time to Data Ready|||8.4|ms|6|
|I2C Slave Address||0x28||Counts Hex||
|Media|Liquids andgases compatible with 316L Stainless Steel|||||



1. 666 to 399A Hex counts. 

2. Accuracy: Combined BFSL linearity, pressure hysteresis and repeatability. 

3. Total Error Band: Calibration errors and temperature effects over compensated range. 

4. Between case and sensor pins. 

5. Temperature range may be less with connectors or wires. 

6. Start Time to Data Ready is the time after Power on Reset (POR) to obtain valid data. 

Digital Pressure Sensor  | **3** 

## NPI-19 Series - Functional Description 

## I[2] C 

In I[2] C Mode, each command is started as shown in Figure 1. Only the number of bytes that is needed for the command has to be sent. After the execution of a command (busy = 0) the expected data can be read as illustrated in Figure 3, or if no data are returned by the command the next command can be sent. The status can be read at any time as described in Figure 2. 

**==> picture [484 x 270] intentionally omitted <==**

**----- Start of picture text -----**<br>
Command Request (I [2] C Write)<br>from master to slave S START condition<br>S SlaveAddr 0 A Command A P<br>from slave to master P STOP condition<br>write<br>CmdDat CmdDat A acknowledge<br>S SlaveAddr 0 A Command A A A P<br><15:8> <7:0><br>N not acknowledge<br>write<br>Figure 1 - I [2] C Command Request<br>Read Status (I [2] C Read)<br>S SlaveAddr 1 A Status N P<br>read<br>Figure 2 - I [2] C Read Status<br>**----- End of picture text -----**<br>


## **Read Data (I[2] C Read)** 

- (a) Example after the completion of a Memory Read command 

**==> picture [398 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
MemDat MemDat<br>S SlaveAddr 1 A Status A A N P<br><15:8> <7:0><br>read<br>(b) Example after the completion of a Full Measurement command (ACHEX)<br>S SlaveAddr 1 A Status A BridgeDat A BridgeDat A TempDat A TempDat N P<br><15:8> <7:0> <15:8> <7:0><br>read<br>**----- End of picture text -----**<br>


Figure 3 - I[2] C Read Data 

All mandatory I²C-bus protocol features are implemented. Optional features like clock stretching, 10-bit slave address, etc., are not supported by the sensor’s interface. 

In I²C-High Speed Mode, a command consists of a fixed length of three bytes. 

**4  |** NovaSensor NPI-19 Series 

## I[2] C Parameters 

|Parameter<br>SCL clock frequency|Symbol<br>fFCL|Min.<br>100|Max.<br>400|Units<br>kHz|
|---|---|---|---|---|
|Start condition hold time relative to SCL edge|tHDSTA|0.1||µS|
|Minimum SCL clock low width1)|tLOW|0.6||µS|
|Minimum SCL clock high width1)|tHIGH|0.6||µS|
|Start condition setup time relative to SCL edge|tSUSTA|0.1||µS|
|Data hold time on SDA relative to SCL edge|tHDDAT|0||µS|
|Data setup time on SDA relative to SCL edge|tSUDAT|0.1||µS|
|Stop condition setup time on SCL|tSUSTO|0.1||µS|
|Bus free time between stop condition and start condition|tBUS|2||µS|
|1)Combined low and high widths must equal or exceed minimum SCLK period.|||||



1) Combined low and high widths must equal or exceed minimum SCLK period. 

## I[2] C Timing Diagram 

## **Output Transfer Function** 

|Pressure<br>Pmin|%<br>Output<br>10|Decimal<br>Counts<br>1638|Hexadecimal<br>Counts<br>0x0666|
|---|---|---|---|
|Pmid|50|8192|0x2000|
|Pmax|90|14746|0x399A|



**==> picture [333 x 26] intentionally omitted <==**

**----- Start of picture text -----**<br>
P (applied) - P (min)<br>Output (Counts) = X [Output (max) - Output (min)]<br>P (max) - P (min)<br>**----- End of picture text -----**<br>


Where: 

Output (max) = 14746 decimal counts Output (min) = 1638 decimal counts 

Digital Pressure Sensor  | **5** 

NPI-19 Series - Ordering Information 

## **NPI-19  NovaSensor Digital Pressure Sensor** 

**Code Thread** A w/o thread J 1/8 NPT -27 M M12*1.5 **Code Pressure Ranges** 002 2.5 psi (17.2 kPa) 005 5 psi (34.5 kPa) 015 15 psi (103 kPa) 030 30 psi (207 kPa) 100 100 psi (689 kPa) 200 200 psi (1379 kPa) 300 300 psi (2068 kPa) **Code Pressure Type** A Absolute 15 psi and above G Gauge **Code Output** 2 I[2] C Output NPI-19          J         100 G 2 _______       ____  -  ____      ____        ____    NPI-19J-100G2: NPT port, 100 psi gauge with I[2] C output and 2 inch flex strip 

Custom pressure ranges and cable options available upon request. 

**6  |** NovaSensor NPI-19 Series 

## **Warranty** 

Amphenol Advanced Sensors warrants its products against defects in material and workmanship for 12 months from the date of shipment. Products not subjected to misuse will be repaired or replaced. Amphenol Advanced Sensors reserves the right to make changes without further notice to any products herein. Amphenol Advanced Sensors makes no warranty, representation or guarantee regarding the suitability of its products for any particular application, nor does Amphenol Advanced Sensors assume any liability arising out of the application or use of any product or circuit and specifically disclaims and all liability without limitation consequential or incidental damages. The foregoing warranties are exclusive and in lieu of all other warranties, whether written, oral, implied or statutory. No implied statutory warranty of merchantability or fitness for particular purpose shall apply. 

Digital Pressure Sensor  | **7** 

## **Amphenol Advanced Sensors** 

## www.amphenol-sensors.com 

© 2022 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. 

**AAS-920-699G  -  08/2022**