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AD8244BRMZ-R7 PDF预览

AD8244BRMZ-R7

更新时间： 2024-01-31 00:56:29
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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AD8244BRMZ-R7 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：TSSOP, TSSOP10,.19,20
针数：10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.31.00.01
风险等级：5.65放大器类型：BUFFER
最大平均偏置电流 (IIB)：0.000002 µA标称带宽 (3dB)：3.3 MHz
25C 时的最大偏置电流 (IIB)：0.000003 µA最大输入失调电压：350 µV
JESD-30 代码：S-PDSO-G10JESD-609代码：e3
长度：3 mm湿度敏感等级：1
负供电电压上限：-18 V标称负供电电压 (Vsup)：-5 V
功能数量：4端子数量：10
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
电源：+-5/+-15 V认证状态：Not Qualified
座面最大高度：1.1 mm标称压摆率：0.8 V/us
子类别：Buffer Amplifier最大压摆率：1.2 mA
供电电压上限：18 V标称供电电压 (Vsup)：5 V
表面贴装：YES技术：BIPOLAR
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3 mmBase Number Matches：1

AD8244BRMZ-R7 数据手册

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Single-Supply, Low Power,  
Precision FET Input Quad Buffer  
AD8244  
Data Sheet  
FEATURES  
PIN CONFIGURATION  
AD8244  
Low power  
IN A  
1
2
3
4
5
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  
9
8
7
6
OUT D  
–V  
+V  
S
S
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  
10  
1
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  
10  
100  
1k  
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  
©2013 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
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