NSA2860

High Accuracy Signal Conditoner and Transmitter for Pressure Sensors

Product Overview

The NSA2860 is a highly integrated IC for sensor conditioning and transmitting. It can be used for resistive or voltage output sensors like resistive bridge pressure sensor, thermocouple, RTD etc. The NSA2860 integrates an external JFET regulator, a 24-bit primary signal measurement channel, a 24-bit temperature measurement channel, sensor calibration logic, a pair of constant current sources and a 16-bit DAC. It can provide digital, 0~5V, 0~10V, 4~20mA, PWM and PDM outputs. The high integrity enables very compact PCB design with very few external components.  With the internal calibration algorithm built in the MCU, the NSA2860 supports to compensate the temperature drift of zero and span up to the 2nd order and also the linearity up to the 3rd order.

Features and Benefits

l  Analog Functions

Low drift voltage reference

Instrumental amplifier with variable gain from 1X to 256X

24-bit ADC for primary signal measurement

24-bit ADC for temperature measurement

Internal and external temperature sensor supported

A pair of current sources

16-bit DAC

l  Digital Functions

1X~8X digital gain

Multiple filter settings

Sensor calibration logic with built-in MCU

EEPROM

l  Output

4~20mA current loop

Ratiometric or absolute voltage outpu (0~5V,0~10V)

Special OWI communication

SPI/I2C

PWM/PDM

l  Others

High voltage regulator with external JFET or Bipolar

Package options: SSOP16 (30mm2), TSSOP20

AEC-Q100 qualified for SSOP16

Operation temperature: -40℃~150℃

Functional Block

  NSA2860-Block.jpg

 

Applications

l Pressure sensors and transmitters

l Thermocouple transmitter

l RTD temperature transmitter

l Other sensors



Attachment