AD628 High Common-Mode Voltage, Programmable Gain Difference Amplifier
●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.
■A reference pin (VREF) provides a dc offset for converting bipolar to single-sided signals. The AD628 converts +5 V, +10 V, ±5 V, ±10 V, and 4 to 20 mA input signals to a single-ended output within the input range of single-supply ADCs.
■The AD628 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 low-pass filter. The AD628 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.
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AD628 、 AD628AR 、 AD628ARM 、 AD628AR-REEL 、 AD628AR-REEL7 、 AD628ARZ 、 AD628ARZ-RL1 、 AD628ARZ-R7 、 AD628ARM-REEL 、 AD628ARM-REEL7 、 AD628ARMZ 、 AD628ARMZ-RL 、 AD628ARMZ-R7 、 AD628-EVAL |
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High Common-Mode Voltage, Programmable Gain Difference Amplifier 、 precision difference amplifier |
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Datasheet |
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Please see the document for details |
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SOIC_N;MSOP;R-8;RM-8 |
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English Chinese Chinese and English Japanese |
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4/07 |
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Rev.G |
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C02992-0-4/07(G) |
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764 KB |
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