Datasheet > AD8421-KGD-WP

AD8421-KGD-WP

更新时间： 2024-01-02 20:22:32

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
8页	242K
描述
3 nV /√Hz, Low Power Instrumentation Amplifier

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AD8421-KGD-WP 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	DIE-11
针数：	0	Reach Compliance Code：	compliant
风险等级：	5.63	放大器类型：	INSTRUMENTATION AMPLIFIER
最大平均偏置电流 (IIB)：	0.008 µA	标称带宽 (3dB)：	10 MHz
最小共模抑制比：	80 dB	最大输入失调电流 (IIO)：	0.003 µA
最大输入失调电压：	135 µV	JESD-30 代码：	R-XUUC-N11
长度：	2.125 mm	负供电电压上限：	-18 V
标称负供电电压 (Vsup)：	-15 V	最大非线性：	0.005%
功能数量：	1	端子数量：	11
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	DIE
封装形状：	RECTANGULAR	封装形式：	UNCASED CHIP
座面最大高度：	0.3048 mm	标称压摆率：	35 V/us
子类别：	Instrumentation Amplifier	供电电压上限：	18 V
标称供电电压 (Vsup)：	15 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子形式：	NO LEAD
端子位置：	UPPER	最大电压增益：	10000
最小电压增益：	1	标称电压增益：	10
宽度：	1.555 mm	Base Number Matches：	1

AD8421-KGD-WP 数据手册

3 nV/√Hz, Low Power

Instrumentation Amplifier

AD8421-KGD

Known Good Die

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Low power: 2.3 mA maximum quiescent current

Low noise

3.2 nV/√Hz maximum input voltage noise at 1 kHz

200 fA/√Hz typical current noise spectral density at 1 kHz

Excellent ac specifications

–IN

OUT

REF

+IN

–V

10 MHz typical small signal bandwidth (gain = 1 and gain = 10)

2 MHz typical small signal bandwidth (gain = 100)

0.6 µs typical settling time to 0.001% (gain = 10)

80 dB minimum CMRR at 20 kHz (gain = 1)

35 V/µs typical slew rate

AD8421-KGD

Figure 1.

High precision dc performance

84 dB minimum CMRR DC to 60 Hz with 1 kΩ source

imbalance (gain = 1)

0.9 µV/°C maximum input offset voltage, average

temperature coefficient

5 ppm/°C maximum gain vs. temperature (gain = 1)

2 nA maximum input bias current

Inputs protected to 40 V from opposite supply

2.5 V to 18 V dual supply (+5 V to +36 V single supply)

Gain set with a single resistor (gain = 1 to 10,000)

Known Good Die (KGD): these die are fully guaranteed to

data sheet specification.

The 10 MHz small signal bandwidth, 35 V/µs slew rate, and

0.6 µs settling time to 0.001% (gain = 10) allow the AD8421-KGD

to amplify high speed signals and excel in applications that require

high channel count, multiplexed systems. Even at higher gains,

the current feedback architecture maintains high performance.

For example, at gain = 100, the bandwidth is 2 MHz and the

settling time is 0.8 µs.

The AD8421-KGD has excellent distortion performance, making

this device suitable for use in demanding applications such as

vibration analysis.

APPLICATIONS

Medical instrumentation

Precision data acquisition

Microphone preamplification

Vibration analysis

Multiplexed input applications

ADC driver

The AD8421-KGD delivers 3 nV/√Hz input voltage noise and

200 fA/√Hz current noise spectral density with only 2 mA

quiescent current, making the device an ideal choice for

measuring low level signals. For applications with high source

impedance, the AD8421-KGD employs innovative process

technology and design techniques to provide noise performance

that is limited only by the sensor.

GENERAL DESCRIPTION

The AD8421-KGD is a low cost, low power, low noise, ultralow

bias current, high speed instrumentation amplifier that is ideally

suited for a broad spectrum of signal conditioning and data

acquisition applications. This device features high CMRR,

allowing the device to extract low level signals in the presence of

high frequency common-mode noise over a wide temperature

range.

The AD8421-KGD uses unique protection methods to ensure

robust inputs while still maintaining low noise. This protection

allows input voltages up to 40 V from the opposite supply rail

without damage to the device.

A single resistor sets the gain from 1 to 10,000. The reference

pin can be used to apply a precise offset to the output voltage.

The AD8421-KGD is specified from −40°C to +85°C and

operational to 125°C.

Additional application and technical information can be found

in the AD8421 data sheet.

Rev. 0

Document Feedback

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

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksare the property oftheir respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Technical Support

www.analog.com

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