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The AD8412ABRMZ is a current-sensitive amplifier produced by ADI, mainly used in 48V and 12V DC-DC systems.

Basic parameters

Amplifier type: Current detection

Number of circuits: 1

Output type: Single-ended

Pressure swing rate: 6V/µs

-3db bandwidth: 1.8 MHz

Current - Input bias: 196 µA

Voltage - Input compensation: 200 µV

Current - Power supply: 7.8mA

Voltage - Span (minimum) : 2.9V

Voltage - Span (maximum) : 5.5V

Operating temperature: -40°C to 125°C (TA)

Installation type: Surface mount type

Packaging/Shell: 8-MSOP

Overview

The AD8412ABRMZ is a high-voltage, high-bandwidth current detection amplifier. The initial gain of this device is 10V/V, the bandwidth is 1.8MHz, and the maximum gain error is ±0.11% throughout the entire temperature range. The buffered output voltage can be directly connected to any typical converter. The AD8412ABRMZ has a minimum DC common-mode rejection ratio (CMRR) of 110dB within the range of -2V to +50V. The AD8412ABRMZ is used for bidirectional current measurement of shunt resistors in various industrial and automotive applications.

The AD8412ABRMZ demonstrates breakthrough performance within the temperature range of -40 °C to +125°C. This kit features an in-package fine-tuning core that enables a typical offset drift of ±0.30μV/°C across the entire operating temperature range and common-mode voltage range, without the need for chopping and an automatic zeroing clock (which may result in intermodulation in applications). This device includes circuits that can achieve a wide input common-mode range and balance the input bias current (regardless of the input differential voltage or common-mode voltage), as well as circuits that can achieve ultra-low CMRR drift. This kit also includes circuits that enable output accuracy in the presence of common-mode input voltages of pulse width modulation (PWM) type. The AD8412ABRMZ is available in an 8-pin MSOP package.

The main features of AD8412ABRMZ are:

1.8MHz small signal, -3dB bandwidth

Adjusting the core within the package (DigiTrim™)

Precise, no chopper and/or automatic zero adjustment

Offset drift: ±0.30μV/°C (typical value)

The maximum voltage offset voltage across the entire temperature range is ±200μV

Dc CMRR: 131dB (Typical value)

Ac CMRR: 97dB (typical value at 50kHz)

Two-way operation

Wide common-mode input voltage range

Continuous operating voltage: -2 V to +50 V

Continuous effective voltage: -20 V to +85 V

Initial gain of 10V/V

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

Power supply operating range: 2.9V to 5.5V

It adopts an 8-pin MSOP package

Application scenarios

The AD8412ABRMZ is suitable for applications that require high-precision current detection

Same-phase or high-end current detection

Motor control of brushless DC motors (BLDC) and low-inductance motors

Bidirectional 48 V to 12 V DC-DC converter

Solenoid valve control

Power rail monitoring

Low-end current detection

For further information on the inventory of the AD8412ABRMZ amplifier, please contact Mingjia Da Electronics online at www.hkmjd.com.