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Technical content

Features

  • 12 bit ADC
  • 4k byte flash (E-ROM) for user application
  • 4K ROM for library routines
  • 128 byte RAM
  • 128 byte EEPROM
  • Battery management—minimizing power consumption
  • Measure and compensate pressure,
  • Media compatibility with tire pressure media
  • 450, 700, and 1400 kPa absolute pressure ranges Custom ranges are available
  • On chip temperature sensor
  • On chip temperature shut down Amphenol Advanced Sensors

-40°F to 257°F (-40°C to 125°C) Storage Temperature -67°F to 257°F (-55°C to 125°C) Battery Supply Voltage 2.1 to 3.6 V (3.0 V typical) Supply Current 600 nA typical power down current at 3.6 V Pressure Ranges 100 to 450, 100 to 700, 0 to 1400 is typical 450 kPa Resolution

  • 1.37 kPa/LSB (450 kPa to 100 kPa/255) 700 kPa Resolution
  • 2.35 kPa/LSB (700 kPa to 100 kPa/255) 1400 kPa Resolution
  • 5.49 kPa/LSB (1400 kPa to 0 kPa/255) Over Pressure 10x Pressure Measurement Measurement Accuracy (2.1 to 3.6 V)
  • -6 to 6 LSB (6Fcapability), 32°F to 122°F (0°C to 50°C)
  • -8 to 8 LSB, -40°F to 257°F (-40°C to 125 °C) Charge Consumption (All Pressure Ranges) 3.2 micro-coulombs; 77°F (25°C), 3V Battery Voltage Measurement
  • ±6 LSB, -40°F to 257°F (-40°C to 125°C)
  • 1 LSB = 10.8 mV/LSB
  • 0.4 micro-coulombs charge consumption Pressure Measurement Measurement Accuracy (2.1 to 3.6 V)
  • -6 to 6 LSB (6 σ capability), 32°F to 122°F (0°C to 50°C)
  • -8 to 8 LSB, -40°F to 257°F (-40°C to 125 °C) Charge Consumption (All Pressure Ranges) 3.2 micro-coulombs; 77°F (25°C), 3V Battery Voltage Measurement
  • ±6 LSB, -40°F to 257°F (-40°C to 125°C)
  • 1 LSB = 10.8 mV/LSB
  • 0.4 micro-coulombs charge consumption NPX1 dimensions in [mm] .41 10.3 .24 6.0 .11 2.8 3.0 .12 .018 0.45 .06 1.5 .13 3.2 .37 9.5 1.27 .05 0.72 .028 .008 0.2 .01 0.15 1.0 .04 CL NPX1 Specifications

-40°F to 257°F (-40°C to 125°C) Resolution Measurement Accuracy (6FFcapability Measurement Charge Consumption

  • 0.8 micro-coulombs Temperature Maximum SHTD represents the temperature at which the thermal shut-down function can be enabled and REL represents the temperature at which the master reset state is released. SHTD
  • 239°F (115°C) maximum
  • 2.1 to 3.6 V
  • Thermal shut-down enabled REL
  • 212°F (100°C) minimum
  • 2.1 to 3.6 V
  • Master reset release Voltage Minimum The voltage at which the Vmin-circuit will return a low battery voltage status is specified in Vmin: Vmin
  • 2.0 to 2.2 V (2.1 V typical) Transfer Functions 450 kPa Pressure P = 1.3725 x Po + 100 P = Pressure in kPa Po = 8 bit scaled output pressure 700 kPa Pressure P = 2.3529 x Po + 100 P = Pressure in kPa Po = 8 bit scaled output pressure 1400 kPa Pressure P = 5.490 x Po P = Pressure in kPa Po = 8 bit scaled output pressure Temperature T = To - 50 T = Temperature in °F (°C) To = 8 bit scaled output temperature V Battery V = 0.0108 x Vo + 4 V = V Battery in V Vo = 8 bit scaled output Vbattery VDD ADC Mux LNA I/O P15 In+ In- Out+ Out- XCLR Lock MOC CH Vss P10 In1 In2 In3 In4 Motion switch (optional) Timer modulator Interrupt control RC oscillator EROM ROM 128 byte EEPROM 128 byte RAM Power management and watchdog/interval timer 8 bit RISC 2D-LF interface Sensor Signal Conditioning MSCL MSDA ASIC Pressure sensor Transmitter UHF P11 P17 P14 Li 3V/3.6V NPX1 NPX1 block diagram NPX1 Specifications

1 IN4 LF receiver channel 2, negative input

2 P10 General purpose I/O with external wakeup

feature, internal pull-up/pull-down

3 P11 General purpose I/O with externalwakeup

feature, internal pull-up/pull-down

4 MSDA Monitor Serial Data I/O with internal pull-up 3

5 MSCL Monitor Serial Clock output 3

6 VDD Battery supply voltage (positive terminal)

8 VSS Common ground (negative terminal)

9 P17 General purpose I/O or Modulator for UHF

10 P15 General purpose I/O or external system clock

11 P14 General purpose I/O or Modulator for UHF

12 IN1 LF receiver channel 1, positive input

13 IN2 LF receiver channel 2, negative input

14 IN3 LF receiver channel 2, positive input

1) P10/P11 inputs have internal pull-up and must be left unconnected if not in use. 2) The functions of P14 and P17 may be interchanged by software. 3) Actual pad function determined by boot sequence. MSCL is an output and must be unconnected in the application. MSDA feature an on-chip pull-up to VBAT may be left open or terminated to VBAT in the application.

Ordering Information

Use this code when ordering NPX-C017 Code Description Shipping 67 450 kPa Tape and reel 68 700 kPa Tape and reel 69 1400 kPa Tape and reel NPX-CO17 ___ - _T__ Typical model number Notice The customer has sole responsibility for designing and implementing a solution, which will ensure safe operation including review of appropriate reliability, required redundancy, mitigation of failure modes and meeting appropriate standards. The customer is responsible for review of any conditions for use including, but not limited to: environmental conditions, electrical supply and residual risk. AAS-920-194B-03/2014 www.amphenol-sensors.com © 2014 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. Amphenol Advanced Sensors NPX1 Specifications