AD628ARZ

AD628 is a precision difference amplifier. It 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. The device has an input common mode and differential mode operating range of ±120V. The high common mode, input impedance makes the device well suited for high voltage measurements across a shunt resistor. The inverting input of the buffer amplifier is available for making a remote kelvin connection. It is used in application such as high voltage current shunt sensing, programmable logic controllers, analogue input front end signal conditioning +5V, +10V, ±5V, ±10V, and 4 to 20mA, isolation, sensor signal conditioning, power supply monitoring, electrohydraulic controls, motor controls etc.

• Gain range 0.1 to 100
• Dual supply operation is ±2.25V to ±18V
• Single supply operation is 4.5V to 36V
• Excellent ac and dc performance
• Offset voltage vs temperature (RTI of input pins) is 8μV/°C
• Offset range is ±1.5V mV maximum
• CMRR RTI is 75dB minimum at (dc to 500Hz, G = +1)
• Quiescent current 1.6mA max at (TA = 25°C, VS = ±15V, RL = 2Kohm, REXT1 = 10Kohm)
• Operating temperature range is −40°C to +85°C
• Package style is 8-lead SOIC-N

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party