Product details

Operating temperature range (C) -40 to 150 Vs (Min) (V) 4.5 Interface type I2C Vs (Max) (V) 20 Resolution (Bits) 16 Rating Catalog
Operating temperature range (C) -40 to 150 Vs (Min) (V) 4.5 Interface type I2C Vs (Max) (V) 20 Resolution (Bits) 16 Rating Catalog
TSSOP (PW) 16 22 mm² 5 x 4.4
  • Analog Features
    • Dual Channel Analog Front-End
    • On-Chip Temperature Sensor
    • Programmable Gain up to 200 V/V
    • 16-Bit Sigma-Delta Analog-to-Digital Converter
  • Digital Features
    • 3rd-Order Linearity Compensation Algorithm
    • EEPROM Memory for Device Configuration, Calibration Data, and User Data
    • I2C Interface
    • One-Wire Interface Through Power Line
  • General Features
    • AFE Sensor Input, Power Supply, and Output Buffer Diagnostics
    • Memory Built-In Self-Test (MBIST)
    • Watchdog
    • Power Management Control
  • Analog Features
    • Dual Channel Analog Front-End
    • On-Chip Temperature Sensor
    • Programmable Gain up to 200 V/V
    • 16-Bit Sigma-Delta Analog-to-Digital Converter
  • Digital Features
    • 3rd-Order Linearity Compensation Algorithm
    • EEPROM Memory for Device Configuration, Calibration Data, and User Data
    • I2C Interface
    • One-Wire Interface Through Power Line
  • General Features
    • AFE Sensor Input, Power Supply, and Output Buffer Diagnostics
    • Memory Built-In Self-Test (MBIST)
    • Watchdog
    • Power Management Control

The PGA302 is a low-drift, low-noise, programmable signal-conditioner device designed for a variety of resistive bridge-sensing applications like pressure-, temperature-, and level-sensing applications. The PGA302 can also support flow metering applications, weight scale and force-sensing applications that use strain gauge load cells, and other general resistive bridge signal-conditioning applications.

The PGA302 provides a bridge excitation voltage of 2.5 V and a current output source with programmable current output up to 1 mA. At the input, the device contains two identical analog front-end (AFE) channels followed by a 16-bit Sigma-Delta ADC. Each AFE channel has a dedicated programmable gain amplifier with gain up to 200 V/V.

In addition, one of the channels integrates a sensor offset compensation function while the other channel integrates an internal temperature sensor.

At the output of the device, a 1.25-V, 14-bit DAC is followed by a ratiometric-voltage supply output buffer with gain of 4 V/V allowing a 0-5V ratiometric voltage system output. The PGA302 device implements a third-order temperature coefficient (TC) and non-linearity (NL) digital compensation algorithm to calibrate the analog output signal. All required parameters for the linearization algorithm as well as other user data is stored in the integrated EEPROM memory.

For system connectivity the PGA302 device integrates an I2C Interface as well as a one-wire interface (OWI) that supports communication and configuration through the power-supply line during final system calibration process. Diagnostics are implemented at the excitation output sources, the input to the AFE and the power supplies in the device. System Diagnostics like sensor open / short are also supported.

PGA302 accommodates various sensing element types, such as piezoresistive, ceramic film, strain gauge, and steel membrane. The device can also be used in accelerometer, humidity sensor signal-conditioning applications, as well as in some current-sensing, shunt-based applications.

The PGA302 is a low-drift, low-noise, programmable signal-conditioner device designed for a variety of resistive bridge-sensing applications like pressure-, temperature-, and level-sensing applications. The PGA302 can also support flow metering applications, weight scale and force-sensing applications that use strain gauge load cells, and other general resistive bridge signal-conditioning applications.

The PGA302 provides a bridge excitation voltage of 2.5 V and a current output source with programmable current output up to 1 mA. At the input, the device contains two identical analog front-end (AFE) channels followed by a 16-bit Sigma-Delta ADC. Each AFE channel has a dedicated programmable gain amplifier with gain up to 200 V/V.

In addition, one of the channels integrates a sensor offset compensation function while the other channel integrates an internal temperature sensor.

At the output of the device, a 1.25-V, 14-bit DAC is followed by a ratiometric-voltage supply output buffer with gain of 4 V/V allowing a 0-5V ratiometric voltage system output. The PGA302 device implements a third-order temperature coefficient (TC) and non-linearity (NL) digital compensation algorithm to calibrate the analog output signal. All required parameters for the linearization algorithm as well as other user data is stored in the integrated EEPROM memory.

For system connectivity the PGA302 device integrates an I2C Interface as well as a one-wire interface (OWI) that supports communication and configuration through the power-supply line during final system calibration process. Diagnostics are implemented at the excitation output sources, the input to the AFE and the power supplies in the device. System Diagnostics like sensor open / short are also supported.

PGA302 accommodates various sensing element types, such as piezoresistive, ceramic film, strain gauge, and steel membrane. The device can also be used in accelerometer, humidity sensor signal-conditioning applications, as well as in some current-sensing, shunt-based applications.

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Technical documentation

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Type Title Date
* Data sheet PGA302 Sensor Signal Conditioner With 0-5V Ratiometric Output datasheet 15 Dec 2017
User guide PGAxxxEVM-037 Pressure Sensor Signal Conditioner Evaluation Module User's Guide 28 Dec 2017
Technical article Get Connected: A new blog series 10 Jan 2014

Design & development

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Evaluation board

PGA302EVM-037 — PGA302 Pressure Sensor Signal Conditioner Evaluation Module

PGA302EVM-037 is an evaluation module (EVM) that provides a platform to test the PGA302 in the TSSOP package. PGA302EVM-037 is shipped with a PGA302 device soldered down on the board. The user is able to emulate a pressure sensor with an onboard resistive bridge controlled by a digital (...)

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PGA302EVM GUI

SLDC017.ZIP (7543 KB)
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TSSOP (PW) 16 View options

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