TI PGA280AIPWR

The PGA280 is a high-precision instrumentation amplifier with digitally-controllable gain and signal integrity test capability. This device offers low offset voltage, near-zero offset and gain drift, excellent linearity, and nearly no 1/f noise with superior common-mode and supply rejection to support high-resolution precision measurement. The 36-V supply capability and wide, high-impedance input range comply with requirements for universal signal measurement. Special circuitry prevents inrush currents from multiplexer (MUX) switching. In addition, the input switch matrix enables easy reconfiguration and system-level diagnostics—overload conditions are indicated. The configurable general-purpose input/output (GPIO) offers several control and communication features. The SPI can be expanded to communicate with more devices, supporting isolation with only four ISO couplers. The PGA280 is available in a TSSOP24 package and is specified from -40°C to +105°C.

• Wide input range: ±15.5 V at ±18-V supply
• Binary gain steps: 128V/V to 1/8 V/V
• Additional scaling factor: 1 V/V and 1% V/V
• Low offset voltage: 3 μV at G = 128
• Near-zero long-term drift of offset voltage
• Near-zero gain drift: 0.5 ppm/°C
• Excellent linearity: 1.5 ppm
• Excellent CMRR: 140 dB
• High input impedance
• Very low 1/f noise
• Differential signal output
• Overload detection
• Input configuration switch matrix
• Wire break test current
• Expandable SPI with checksum
• General-purpose I/O port
• TSSOP-24 package

• Analog input module
• Data acquisition (DAQ)
• Battery test