GENERAL DESCRIPTION

The AD8411A1 is a high-voltage, high-bandwidth current-sense

amplifier. The device features an initial gain of 50 V/V, with a 2.7

MHz bandwidth with a maximum ±0.15 gain error over the entire

temperature range. The buffered output voltage directly interfaces

with any typical converter. The AD8411A has a minimum DC common-

mode rejection ratio (CMRR) of 123 dB from −2 V to +70 V.

The AD8411A performs bidirectional current measurements across

a shunt resistor in various industrial and automotive applications.

The AD8411A offers breakthrough performance throughout the

−40°C to +125°C temperature range. The device features an

in-package trim core, which leads to a typical offset drift of

±0.26 μV/°C (based on Box Method, see Figure 53) throughout the

operating temperature range and the common-mode voltage range

without the need for chopping and auto-zero clocks (which could

lead to intermodulation in the application). The device includes

circuitry to achieve a wide input common-mode range and balanced

input bias currents, regardless of input differential voltage or common-

mode voltage, and circuitry to achieve ultra-low CMRR drift.

The device also includes circuitry to enable output accuracy in

the presence of pulse-width modulation (PWM) type input commonmode

voltages. The AD8411A is available in 8-lead, Mini Small Outline Package (MSOP).

FEATURES

► 2.7 MHz small signal, −3 dB bandwidth

► In-package Trim Core (DigiTrim™)

► Precision without chopping and/or auto-zero

► Typical ±0.26 μV/°C offset drift

► Maximum ±200 μV voltage-offset over temperature range

► Typical DC CMRR: 142 dB

► Typical AC CMRR at 50 kHz: 96 dB

► Wide common-mode input voltage range

► −2 V to +70 V, continuous operation

► −20 V to +85 V, continuous survival

► Initial gain: 50 V/V

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

► Bidirectional operation

► 2.9 V to 5.5 V power-supply operating range

► Available in 8-lead, MSOP package

► AEC-Q100 Automotive Qualified

APPLICATIONS

► In-phase or High-side current sensing in

► BLDC motors, Low-inductance motors

► Bidirectional 48 V to 12 V DC-DC converters

► Solenoid controls

► Power rail monitoring

► Low-side current sensing