PGA280

Product Folder Order Now Technical Documents Tools & Software Support & Community PGA280 SBOS487B – JUNE 2009 – REVISED MARCH 2020 PGA280 Zerø-Drift, High-Voltage, Programmable Gain Instrumentation Amplifier 1 Features 1 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 1⅜ 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 2 Applications Analog input module Data acquisition (DAQ) Aircraft engine control Battery test 3 Description 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 highresolution 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-...