Datasheet > AD8411A

AD8411A

更新时间： 2024-11-22 14:58:11

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
25页	1727K
描述
?2 V至70 V宽输入电压范围、2.7 MHz高带宽、具有PWM抑制和50 V/V增益的电流检测放大器

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AD8411A 数据手册

Data Sheet

AD8411A

−2 V to 70 V Wide Input Voltage Range, 2.7 MHz High Bandwidth,

Current-Sense Amplifier with PWM Rejection and Gain 50 V/V

GENERAL DESCRIPTION

FEATURES

The AD8411A¹is a high-voltage, high-bandwidth current-sense

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

► 2.7 MHz small signal, −3 dB bandwidth

™

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 com-

mon-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.

► 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

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 56) 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 in-

cludes 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 com-

mon-mode voltages. The AD8411A is available in 8-lead, SOIC_N

package and 8-lead, MSOP package.

► Available in 8-lead, SOIC_N package and 8-lead, MSOP pack-

age.

► AEC-Q100 qualified for automotive applications

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

TYPICAL APPLICATION CIRCUIT

Figure 2. Input Common-Mode Step Response (0 V to 60 V), V_S= 5 V, Inputs

Shorted

Figure 1. AD8411A in BLDC Motor Control Application

Protected by U.S. patent numbers 10,312,865 and 10,587,228.

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to

change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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与AD8411A相关器件

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AD8417	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417_17	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417-2	ADI	获取价格	双向零点漂移电流检测放大器
AD8417BRMZ	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417BRMZ-RL	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417R-EVALZ	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417RM-EVALZ	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417WBRMZ	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417WBRMZ-RL	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier
AD8417WBRZ	ADI	获取价格	Bidirectional, Zero Drift, Current Sense Amplifier

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