GENERAL DESCRIPTION
●The AD628 is a precision difference amplifier that combines excellent dc performance with high common-mode rejection over a wide range of frequencies. When used to scale high voltages, it allows simple conversion of standard control voltages or currents for use with single-supply ADCs. A wideband feedback loop minimizes distortion effects due to capacitor charging of Σ-Δ ADCs.
●FEATURES
●High common-mode input voltage range
● ±120 V at VS= ±15 V
●Gain range 0.1 to 100
●Operating temperature range: −40°C to ±85°C
●Supply voltage range
● Dual supply: ±2.25 V to ±18 V
● Single supply: 4.5 V to 36 V
●Excellent ac and dc performance
●Offset temperature stability RTI: 10 μV/°C maximum
●Offset: ±1.5 V mV maximum
●CMRR RTI: 75 dB minimum, dc to 500 Hz, G = +1
●APPLICATIONS
●High voltage current shunt sensing
●Programmable logic controllers
●Analog input front end signal conditioning
● +5 V, +10 V, ±5 V, ±10 V, and 4 to 20 mA
●Isolation
●Sensor signal conditioning
●Power supply monitoring
●Electrohydraulic control
●Motor control
