Programmable Resistive Sensing Conditioner with Digital and Analog Outputs


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The PGA900 is a signal conditioner for resistive sensing applications. It can accommodate various sensing element types. The PGA900 conditions its input signals by amplification and digitization through two analog front end channels. With the user programmed software in the on-chip ARM Cortex M0 processor, the PGA900 can perform linearization, temperature compensation, and other user defined compensation algorithms. The conditioned signal can be output as ratiometric voltage, absolute voltage, 4- to 20-mA current loop or PWM. The data and configuration registers can also be accessed through SPI, I2C, UART, and two GPIO ports. In addition, the unique OWI allows communication and configuration through the power supply pin without using additional lines. The PGA900 operating voltage is from 3.3 to 30 V and it can operate in temperatures from –40°C to 150°C.


  • High Accuracy, Low Noise, Low Power, Small
    Size Resistive Sensing Signal Conditioner
  • User-Programmable Temperature and
    Nonlinearity Compensation
  • On-Chip ARM® Cortex® M0 Microprocessor
    Allows Users to Develop and Implement
    Calibration Software
  • One-Wire Interface Enables the Communication
    through Power Supply Pin Without Using
    Additional Lines
  • On-Chip Power Management Accepts Wide
    Power Supply Voltage from 3.3 V to 30 V
  • Operating Temperature Range: –40°C to 150°C
  • Memory
    • 8 KB Software Memory
    • 128 Bytes EEPROM
    • 1 KB Data SRAM
  • Accommodates Sensor Sensitivities from 1 mV/V
    to 135 mV/ V
  • Two Individual Analog-Front End (AFE) Chains,
    each Including:
    • Low Noise Programmable Gain Amplifier
    • 24-bit Sigma-Delta Analog-to-Digital Converter
  • Built-in Internal Temperature Sensor With Option
    to Use External Temperature Sensor
  • 14-bit DAC With Programmable Gain Amplifier
  • Output Options:
    • Ratiometric and Absolute Voltage Output
    • 4- to 20-mA Current Loop Interface
    • One-Wire Interface (OWI) Over Power Line
    • PWM Output
    • Serial Peripheral Interface (SPI)
    • Inter-Integrated Circuit (I2C)
  • Depletion MOSFET Gate Driver
  • Diagnostic Functions

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Parametrics Compare all products in Resistive Bridge Sensor Signal Conditioners

# Input Channels
Vs (Min) (V)
Vs (Max) (V)
Resolution (Bits)
Sample Rate (max) (SPS)
Operating Temperature Range (C)
Package Size: mm2:W x L (PKG)
Package Group
PGA900 PGA300
2    2   
3.3    3.3   
30    30   
24    16   
15.6k    15.6k   
Ratiometric Analog Voltage
Ratiometric Analog Voltage
Catalog    Catalog   
-40 to 150    -40 to 150   
See datasheet (DSBGA)
36VQFN: 36 mm2: 6 x 6(VQFN)   
36VQFN: 36 mm2: 6 x 6(VQFN)