Datasheet > AD8244ARMZ

AD8244ARMZ

更新时间： 2024-11-18 12:33:55

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	448K
描述
Single-Supply, Low Power, Precision FET Input Quad Buffer

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AD8244ARMZ 数据手册

Single-Supply, Low Power,

Precision FET Input Quad Buffer

AD8244

Data Sheet

FEATURES

PIN CONFIGURATION

AD8244

Low power

IN A

10 IN D

250 µA maximum supply current per amplifier

FET input

2 pA maximum input bias current at 25°C

Extremely high input impedance

Low noise

13 nV/√Hz voltage noise at 1 kHz

0.4 µV p-p voltage noise (0.1 Hz to 10 Hz)

0.8 fA/√Hz current noise at 1 kHz

High dc precision

OUT A

OUT D

–V

OUT B

IN B

OUT C

IN C

Figure 1.

3 µV/°C maximum offset drift (B grade)

3 MHz bandwidth

Unique pinout

No leakage from inputs to supply pins

Provides guarding capability

Rail-to-rail output

TYPICAL MISMATCH

BETWEEN ANY

TWO CHANNELS

IN-AMP

1/2

Single-supply operation

Input range extends to ground

Wide supply range

AD8244

0.1

Single-supply: 3 V to 36 V

Dual-supply: 1.5 V to 18 V

Available in a compact 10-lead MSOP

0.01

0.001

APPLICATIONS

100

10k

100k

Biopotential electrodes

Medical instrumentation

High impedance sensor conditioning

Filters

FREQUENCY (Hz)

Figure 2. Gain Matching vs. Frequency

Photodiode amplifiers

GENERAL DESCRIPTION

The AD8244 is a precision, low power, FET input, quad unity-gain

buffer that is designed to isolate very large source impedances

from the rest of the signal chain. The 2 pA maximum bias

current, near zero current noise, and 10 TΩ input impedance

introduce almost no error, even with source impedance well

into the megaohms.

high impedance inputs from the low impedance supplies and

outputs of the other buffers. This configuration simplifies

guarding while reducing board space, allowing high performance

and high density in the same design.

The AD8244 design is focused on solving problems specific to

buffers. This includes close channel-to-channel matching which

allows channels of the AD8244 to be used in differential signal

chains with minimal error. With its low voltage noise, wide

supply range, and high precision, the AD8244 is also flexible

enough to provide high performance anywhere a unity-gain

buffer is needed, even with low source resistance.

Many traditional operational amplifier pinouts have a supply

pin that is next to the noninverting input. A guard trace must be

routed between these pins to avoid leakage currents much larger

than the bias current of a FET input op amp. Guard traces can

be routed between pins for large packages, such as DIP or even

SOIC; however, the board area consumed by these packages is

prohibitive for many modern applications. The AD8244 solves

this problem with a unique pinout that physically separates the

The AD8244 is specified over the industrial temperature range

of −40°C to +85°C. It is available in a 10-lead MSOP package.

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.

Trademarks andregisteredtrademarks are the property of their 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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AD8244ARMZ 替代型号

型号	品牌	替代类型	描述	数据表
AD8244ARMZ-R7	ADI	完全替代	Single-Supply, Low Power, Precision FET Input Quad Buffer

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AD8244ARMZ-R7	ADI	获取价格	Single-Supply, Low Power, Precision FET Input Quad Buffer
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AD824AN-3V	ADI	获取价格	Single Supply, Rail-to-Rail Low Power, FET-Input Op Amp
AD824AR	ADI	获取价格	Single Supply, Rail-to-Rail Low Power, FET-Input Op Amp
AD824AR-14	ADI	获取价格	Single Supply, Rail-to-Rail Low Power, FET-Input Op Amp
AD824AR-14-3V	ADI	获取价格	Single Supply, Rail-to-Rail Low Power, FET-Input Op Amp

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