1 Features
• Rail-to-rail input common-mode voltage range,
specified over temperature
• Rail-to-rail output swing within 100mV of supply
rail, 2kΩ load
• Can operate on standard 5V and 15V supplies
• Excellent CMRR and PSRR: 82dB
• Ultra-low input current: 150fA
• Low supply current (at VS = 5V): 500μA/amplifier
• Low offset voltage drift: 1.0μV/°C

2 Applications
• Automotive transducer amplifier
• Pressure sensor
• Oxygen sensor
• Temperature sensor
• Speed sensor

3 Description
The LMC6492 and LMC6494 (LMC649x) amplifiers
were specifically developed for single-supply
applications that operate from −40°C to +125°C. This
feature is an excellent choice for automotive systems
because of the wide temperature range. A unique
design topology enables the LMC649x common-mode
voltage range to accommodate input signals beyond
the rails. This eliminates non-linear output errors
due to input signals exceeding a traditionally limited
common-mode voltage range. The LMC649x signal
range has a high CMRR of 82dB for excellent
accuracy in noninverting circuit configurations.
The LMC649x rail-to-rail input is complemented by
rail-to-rail output swing. This configuration provides
maximum dynamic signal range and is particularly
important in 5V systems.
An ultra-low input current of 150fA and a 120dB openloop
gain provide high accuracy and direct interfacing
with high-impedance sources.