Catalog
Zero Drift, HV Programmable Gain Amplifier
Key Features
• Wide input range: ±15.5 V at ±18-V supplyBinary gain steps: 128V/V to 1/8 V/VAdditional scaling factor: 1 V/V and 1⅜ V/VLow offset voltage: 3 µV at G = 128Near-zero long-term drift of offset voltageNear-zero gain drift: 0.5 ppm/°CExcellent linearity: 1.5 ppmExcellent CMRR: 140 dBHigh input impedanceVery low 1/f noiseDifferential signal outputOverload detectionInput configuration switch matrixWire break test currentExpandable SPI™ with checksumGeneral-purpose I/O portTSSOP-24 packageWide input range: ±15.5 V at ±18-V supplyBinary gain steps: 128V/V to 1/8 V/VAdditional scaling factor: 1 V/V and 1⅜ V/VLow offset voltage: 3 µV at G = 128Near-zero long-term drift of offset voltageNear-zero gain drift: 0.5 ppm/°CExcellent linearity: 1.5 ppmExcellent CMRR: 140 dBHigh input impedanceVery low 1/f noiseDifferential signal outputOverload detectionInput configuration switch matrixWire break test currentExpandable SPI™ with checksumGeneral-purpose I/O portTSSOP-24 package
Description
AI
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 TSSOP-24 package and is specified from –40°C to +105°C. For all available packages, see the package option addendum at the end of the data sheet.
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 TSSOP-24 package and is specified from –40°C to +105°C. For all available packages, see the package option addendum at the end of the data sheet.
