AM447

Features:

• Very Low Offset Voltage: < 25µV
• Low Input Bias Current: 5nA
• High Input Sensitivity
• High CMRR: > 90dB min
• Wide Operating Temperature Range: 40°C...+140°C
• Adjustable RailtoRail Voltage Output Stage: 0.5...4.5V
• Single Supply Device (ratiometric)
• Integrated Source and Sink Capability: ±2mA
• Low Noise Behaviour


Application

• Small Signal (Bridge) Amplifier
   Low Pressure Sensors
   Automotive Applications
   DMS Interface
   Interface for Ceramic Sensors
• High Precision Amplifier
   Medical Instrumentation
   Data Acquisition


Pinout




Description

The AM447 is a high precision amplifier, designed for amplification of sensor bridge signals up to 35mV full scale. The single supply circuit consists of a high precision instrumentation amplifier (IA) and an integrated ratiometric output stage. Input offset voltages less than ±25µV (±1µV/°C) are adjustable by only two externally trimmable resistors. The monitoring of the amplified signal is possible at the output of the IA and makes the adjustment easier. With the externally adjustable gain of the output stage, the AM447 can be used for different signal sources. The 2mA sink and source capability makes it ideal for high precision applications specially in the field of automotive sensors.