Microchip Technology Inc.

MCP6N11 Instrumentation Amplifier Family

The MCP6N11 is an instrumentation amplifier (INA) with Enable/VOS Calibration pin (EN/CAL) and several minimum gain options. It is optimized for single-supply operation with rail-to-rail input (no common mode crossover distortion) and output performance.

Two external resistors set the gain, minimizing gain error and drift-over temperature. The reference voltage (Vref) shifts the output voltage (Vout).The supply voltage range (1.8V to 5.5V) is low enough to support many portable applications. All devices are fully specified from -40°C to +125°C.

These parts have five minimum gain options (1, 2, 5, 10 and 100 V/V). This allows the user to optimize the input offset voltage and input noise for different applications.

FEATURES & BENEFITS

  • Wide power supply range and low power standby mode for long battery life in portable medical devices.
  • Multiple minimum gain options simplify interfacing to a variety of medical sensors.

TECHNICAL SPECS

  • Typical supply current: 800 µA
  • Common Mode Rejection Ratio (CMRR): 115 dB (typical, GMIN = 100)
  • Power Supply Rejection Ratio (PSRR): 112 dB (typical, GMIN = 100)

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APPLICATION AREAS

Signal chain conditioning for high-side current sensors, Wheatstone bridge sensors or difference amplifiers in electronic medical devices such as, ECG heart monitors, myoelectrical monitors, and electrochemical sensors.

AVAILABILITY

All variants of the MCP6N11 are in production. In addition, a Wheatstone Bridge Reference Design and Demo Board is available as part number ARD00354.

Contact Information

Microchip Technology Inc.

2355 W. Chandler Blvd.
Chandler, AZ, 85224
USA

tele: 480.792.7200
toll-free: 888.MCU.MCHP
fax: 480.792.7277
here2help@microchip.com
www.microchip.com

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