Product Features

AM417 - Ratiometric Instrumentation Amplifier IC

AM417 is a low-cost sensor signal-conditioning IC for differential input voltages. The fully analog IC generates a ratiometric voltage output signal with adjustable offset and gain. With its integrated current source and its wide temperature range it is particularly suitable for automotive bridge signal-conditioning circuits.

AM417 is a low-cost ratiometric interface IC which has been specifically designed for the conditioning of differential signals. The IC is particularly suitable for the signal evaluation of sensor elements which have to be powered by an internal current source (OP). These include piezoresistive and magnetoresistive silicon measuring cells and temperature sensing elements based on a resistor setup. In essence AM417 consists of a precision instrumentation amplifier, a ratiometric operational amplifier and a protected voltage output which has been configured as a driver stage. The amplifier can be adjusted across a wide range using two external resistors and the offset of an additional resistor affixed to the measuring bridge. 

Precision amplifier AM417 has been engineered in such a way that it can be used as an instrumentation amplifier for follow-on processors or A/D converters to make optimum use of the converter range.

Part Descriptions

Applications

• Silicon pressure sensors
• Sensor signal-conditioner
• Analog front end for µC
• Differential voltage amplifier