Data Sheet

AD8417-2

Bidirectional, Zero Drift, Current Sense Amplifier

Rev. 0

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FEATURES

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Typical 0.1 µV/°C offset drift

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Maximum ±400 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

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−2 V to +36 V continuous

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Initial gain = 60 V/V

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Wide operating temperature range: −40°C to +125°C

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Bidirectional operation

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Dual channel in a small 1 mm x 1.9 mm WLCSP

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Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz

APPLICATIONS

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High-side current sensing in:

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Motor controls

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Solenoid controls

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Power management

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Low-side current sensing

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Diagnostic protection

TYPICAL APPLICATION CIRCUIT

Figure 1. 3-Phase Motor Control

FUNCTIONAL BLOCK DIAGRAM

Figure 2. Functional Block Diagram

GENERAL DESCRIPTION

The AD8417-2 is a high-voltage, high-resolution dual-channel cur-

rent shunt amplifier. It features an initial gain of 60 V/V and per-

forms bidirectional current measurements across a shunt resistor in

a variety of automotive and industrial applications, including motor

control, power management, and solenoid control.

The AD8417-2 offers breakthrough performance throughout the

−40°C to +125°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 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 ±200 µV.

The AD8417-2 is offered in a small 10-ball 1 mm × 1.9 mm WLCSP.

It requires a smaller board area than a typical single-channel

current sense amplifier, increasing 2× channel density, and a lower

cost per channel without compromising performance.

Table 1. Related Devices

Part No.

Description

AD8205

Current sense amplifier, gain = 50

AD8206

Current sense amplifier, gain = 20

AD8207

High accuracy current-sense amplifier, gain = 20

AD8210

High speed current sense amplifier, gain = 20

AD8417

High accuracy current sense amplifier, gain = 60

AD8418

High accuracy current sense amplifier, gain = 20