PGA280

零漂移、HV 可编程增益放大器

The 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 36V 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.

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WIDE INPUT RANGE: ±15.5V at ±18V SUPPLY

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BINARY GAIN STEPS: 128V/V to 1/8V/V

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ADDI ONAL SCALING FACTOR: 1V/V and 1⅜V/V

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LOW OFFSET VOLTAGE: 3µV at G = 128

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NEAR-ZERO LONG-TERM DRIFT OF OFFSET VOLTAGE

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NEAR-ZERO GAIN DRIFT: 0.5ppm/°C

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EXCELLENT LINEARITY: 1.5ppm

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EXCELLENT CMRR: 140dB

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HIGH INPUT IMPEDANCE

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VERY LOW 1/f NOISE

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DIFFERENTIAL SIGNAL OUTPUT

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OVERLOAD DETECTION

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INPUT CONFIGURATION SWITCH MATRIX

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WIRE BREAK TEST CURRENT

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EXPANDABLE SPI WITH CHECKSUM

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GENERAL-PURPOSE I/O PORT

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TSSOP-24 PACKAGE

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APPLICATIONS

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HIGH-PRECISION SIGNAL INSTRUMENTATION

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MULTIPLEXED DATA ACQUISITION

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HIGH-VOLTAGE ANALOG INPUT AMPLIFIER

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UNIVERSAL INDUSTRIAL ANALOG INPUT

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