AD628ARMZ Datasheet

Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps


The AD628ARMZ 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. A reference pin (VREF)provides a dc offset for converting bipolar to single-sided signals. The AD628ARMZ converts +5 V, +10 V, ±5 V, ±10 V, and 4 to 20 mA input signals to a single-ended output within theinput range of single-supply ADCs. The AD628ARMZ has an input common mode and differential mode operating range of ±120 V. 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. A precision 10 kΩ resistor connected to an external pin is provided for either a low-pass filter or to attenuate large differential input signals. A single capacitor implements a lowpass filter. The AD628ARMZ operates from single and dual supplies and is available in an 8-lead SOIC_N or an 8-lead MSOP. It operates over the standard industrial temperature range of −40°C to +85°C. AD628ARMZ 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 AD628ARMZ 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 controls • Motor controls


[{"Name":"Slew Rate","Value":"0.3 V/μs"},{"Name":"-3db Bandwidth","Value":"600kHz"},{"Name":"Current - Input Bias","Value":"1.5nA"},{"Name":"Voltage - Input Offset","Value":"150μV"},{"Name":"Current - Supply","Value":"1.6mA"},{"Name":"Voltage - Supply, Single/Dual (±)","Value":"4.5 V ~ 36 V, ±2.25 V ~ 18 V"},{"Name":"Operating Temperature","Value":"-40°C ~ 85°C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information


Electrification, automation and digitalization are the long-term growth fields of Siemens. In order to take full advantage of the market potential in these fields, our businesses are bundled into eight divisions and Siemens Healthineers as well as Siemens Wind Power as a separately managed businesses.

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