Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers

The EL8171 and EL8172 are micropower instrumentation amplifiers optimized for operation at 2.9V to 5V single supplies. Inputs and outputs can operate rail-to-rail. As with all instrumentation amplifiers, a pair of inputs provide very high common-mode rejection and are completely independent from a pair of feedback terminals. The feedback terminals allow zero input to be translated to any output offset, including ground. A feedback divider controls the overall gain of the amplifier.

Features
• 78µA maximum supply current
• Maximum input offset voltage
    - 300µV (EL8172)
    - 1000µV (EL8171)
• 200pA maximum input bias current
• 3µV/°C offset voltage drift
• 450kHz -3dB bandwidth (G = 10)
• 170kHz -3dB bandwidth (G = 100)
• 0.5V/µs slew rate
• Single supply operation
    - Input voltage range is rail-to-rail
    - Output swings rail-to-rail
• Output sources and sinks ±29mA load current
• 0.2% gain accuracy
• Pb-free plus anneal available (RoHS compliant)

Applications
• Battery- or solar-powered systems
• Strain gauges
• Current monitors
• Thermocouple amplifiers