Single Supply, Auto-Zero Sensor Amplifier w/Programmable Gain & Offset  - PGA308

PGA308 (ACTIVE)

Single Supply, Auto-Zero Sensor Amplifier w/Programmable Gain & Offset

 

Description

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

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Parametrics Compare all products in Resistive Bridge Sensor Signal Conditioners

 
# Input Channels
Vs (Min) (V)
Vs (Max) (V)
Resolution (Bits)
Interface
Rating
Operating Temperature Range (C)
Package Size: mm2:W x L (PKG)
Package Group
PGA308
2   
2.7   
5.5   
16   
UART   
Catalog   
-40 to 125   
10VSON: 12 mm2: 3 x 4(VSON)
10VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
VSON
VSSOP   

Other qualified versions of PGA308

Version Part Number Definition
Automotive PGA308-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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