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AD620BNZ

更新时间： 2024-11-03 04:04:11
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亚德诺 - ADI 仪表放大器放大器电路光电二极管
页数 文件大小 规格书
20页 1000K
描述
Low Cost Low Power Instrumentation Amplifier

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AD620BNZ 数据手册

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Low Cost Low Power  
Instrumentation Amplifier  
AD620  
FEATURES  
Easy to use  
CONNECTION DIAGRAM  
Gain set with one external resistor  
(Gain range 1 to 10,000)  
1
2
3
4
8
7
6
5
R
R
G
G
+V  
–IN  
+IN  
S
Wide power supply range ( 2.3 V to 18 V)  
Higher performance than 3 op amp IA designs  
Available in 8-lead DIP and SOIC packaging  
Low power, 1.3 mA max supply current  
Excellent dc performance (B grade)  
50 µV max, input offset voltage  
0.6 µV/°C max, input offset drift  
1.0 nA max, input bias current  
100 dB min common-mode rejection ratio (G = 10)  
Low noise  
9 nV/√Hz @ 1 kHz, input voltage noise  
0.28 µV p-p noise (0.1 Hz to 10 Hz)  
Excellent ac specifications  
120 kHz bandwidth (G = 100)  
15 µs settling time to 0.01%  
OUTPUT  
REF  
–V  
S
AD620  
TOP VIEW  
Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R) Packages  
PRODUCT DESCRIPTION  
The AD620 is a low cost, high accuracy instrumentation  
amplifier that requires only one external resistor to set gains of  
1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and  
DIP packaging that is smaller than discrete designs and offers  
lower power (only 1.3 mA max supply current), making it a  
good fit for battery-powered, portable (or remote) applications.  
The AD620, with its high accuracy of 40 ppm maximum  
nonlinearity, low offset voltage of 50 µV max, and offset drift of  
0.6 µV/°C max, is ideal for use in precision data acquisition  
systems, such as weigh scales and transducer interfaces.  
Furthermore, the low noise, low input bias current, and low power  
of the AD620 make it well suited for medical applications, such  
as ECG and noninvasive blood pressure monitors.  
APPLICATIONS  
Weigh scales  
ECG and medical instrumentation  
Transducer interface  
Data acquisition systems  
Industrial process controls  
Battery-powered and portable equipment  
The low input bias current of 1.0 nA max is made possible with  
the use of Superϐeta processing in the input stage. The AD620  
works well as a preamplifier due to its low input voltage noise of  
9 nV/√Hz at 1 kHz, 0.28 µV p-p in the 0.1 Hz to 10 Hz band,  
and 0.1 pA/√Hz input current noise. Also, the AD620 is well  
suited for multiplexed applications with its settling time of 15 µs  
to 0.01%, and its cost is low enough to enable designs with one  
in-amp per channel.  
30,000  
10,000  
25,000  
20,000  
15,000  
10,000  
5,000  
0
3 OP AMP  
IN-AMP  
1,000  
(3 OP-07s)  
TYPICAL STANDARD  
BIPOLAR INPUT  
IN-AMP  
100  
G = 100  
AD620A  
G
10  
R
AD620 SUPERβETA  
BIPOLAR INPUT  
IN-AMP  
1
0.1  
1k  
0
5
10  
15  
20  
10k  
100k  
1M  
10M  
100M  
SUPPLY CURRENT (mA)  
SOURCE RESISTANCE (  
Ω
)
Figure 2. Three Op Amp IA Designs vs. AD620  
Figure 3. Total Voltage Noise vs. Source Resistance  
Rev. G  
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 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.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
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AD620BNZ 替代型号

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