TI PGA308AIDGSR

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 V_OUT 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 2x2 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 D_OUT/V_CLAMP pin can be used as a programmable digital output or as a V_OUT over-voltage clamp.

• 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: +2.78 to +5.5 V
• Temperature Range: -40 ℃ to ±125 ℃
• MSOP-10 and 3mm x 4mm DFN-10 Packages

• Bridge Sensors
• Remote 4-20mA Transmitters
• Strain, Load, Weigh Scales
• Automotive Sensors