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Home > Embedded ICs > Embedded - Microcontroller Unit (MCU) > PGA308AIDGSR
Texas Instruments

PGA308AIDGSR

PGA308AIDGSR

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PGA308AIDGSR Overview

The PGA308 is a programmable analog sensor signal conditioner. The analog signal path amplifies the sensor signal and provides digital calibration for offset and gain. Calibration is done via the 1W pin, a digital One-Wire, UART-compatible interface. For three-terminal sensor modules, 1W may be connected to VOUT and the assembly programmed through the VOUT pin. Gain and offset calibration parameters are stored onboard in seven banks of one-time programmable (OTP) memory. The power-on reset (POR) OTP bank may be programmed a total of four times.

The all-analog signal path contains a 2×2 input multiplexer (mux) to allow electronic sensor lead swapping, a coarse offset adjust, an auto-zero programmable gain instrumentation amplifier (PGA), a fine gain adjust, a fine offset adjust, and a programmable gain output amplifier. Fault monitor circuitry detects and signals sensor burnout, overload, and system fault conditions. Over/under-scale limits provide additional means for system level diagnostics. The dual-use DOUT/VCLAMP pin can be used as a programmable digital output or as a VOUT over-voltage clamp.

For detailed application information, see the PGA308 User's Guide (SBOU069) available for download at www.ti.com.

Features

  • Digital Calibration for Bridge Sensors
  • Offset Select: Coarse and Fine
  • Gain Select: Coarse and Fine
  • Bridge Fault Monitor
  • Input Mux for Lead Swap
  • Over/Under Scale Limits
  • DOUT/VOUT Clamp Function
  • Seven Banks OTP Memory
  • One-Wire Digital UART Interface
  • Operating Voltage: +2.7V to +5.5V
  • Temperature Range: –40°C to +125°C
  • MSOP-10 and 3mm × 4mm DFN-10 Packages

Specifications

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