AD8418AWHRZ

Current Sense Amplifiers High Common Mode Cur Sense -3V to 80V

Product Details

The AD8418A is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ±0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8418A offers excellent input common-mode rejection from −2 V to +70 V. The AD8418A performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, power management, and solenoid control.

The AD8418A offers breakthrough performance throughout the −40°C to +150°C temperature range. It features a zero drift core, which leads to a typical offset drift of 0.1 μV/°C throughout the operating temperature range and the common-mode voltage range. The AD8418A is qualified for automotive applications. The device includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation PWM type input common-mode voltages. The typical input offset voltage is ±100 μV. The AD8418A is offered in 8-lead MSOP and SOIC packages.

**Applications**

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High-side current sensing in

Motor controls

Solenoid controls

Power management

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Low-side current sensing

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Diagnostic protection

### Features and Benefits

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Typical 0.1 µV/°C offset drift

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Maximum ±200 µV voltage offset over full temperature range

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2.7 V to 5.5 V power supply operating range

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Electromagnetic interference EMI filters Included

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High common-mode input voltage range

−2 V to +70 V continuous

−4 V to +85 V survival

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Minimum DC common-mode rejection ratio CMRR: 90 dB

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Initial gain = 20 V/V

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Wide operating temperature range:

AD8418AWB: −40°C to +125°C

AD8418AWH: −40°C to +150°C

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Bidirectional operation

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Available in 8-lead SOIC and 8-lead MSOP

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Qualified for automotive applications