AM447

www.DataSheet4U.com High Precision Instrumentation Amplifier 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 Rail–to–Rail Voltage Output Stage: 0.5...4.5V Single Supply Device (ratiometric) Integrated Source and Sink Capability: ±2mA Low Noise Behaviour AM447 GENERAL 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. APPLICATIONS Small Signal (Bridge) Amplifier Low Pressure Sensors Automotive Applications DMS Interface Interface for Ceramic Sensors High Precision Amplifier Medical Instrumentation Data Acquisition DELIVERY DIL16 packages (samples, small quantities) SO16(n) packages Dice on 5“ blue foil BLOCK DIAGRAM OC1 OC2 1 2 14 VCC AM447 IN+ 4 IN3 IA 1k Output Sta...