Image AD623
型号: AD623
厂商: Analog Devices Inc Analog Devices Inc
标准:
分类: 半导体
描述: single supply, rail-to-rail, low cost instrumentation amplifier
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Single Supply, Rail-to-Rail, Low Cost  
Instrumentation Amplifier  
a
AD623  
FEATURES  
Easy to Use  
Higher Performance than Discrete Design  
Single and Dual Supply Operation  
Rail-to-Rail Output Swing  
CONNECTION DIAGRAM  
8-Lead Plastic DIP (N),  
SOIC (R) and SOIC (RM) Packages  
Input Voltage Range Extends 150 mV Below Ground  
(Single Supply)  
Low Power, 575 A Max Supply Current  
Gain Set with One External Resistor  
Gain Range 1 (No Resistor) to 1,000  
1
2
3
4
8
7
6
5
؉R  
؉V  
؊R  
G
G
؊IN  
؉IN  
S
OUTPUT  
؊V  
REF  
S
AD623  
HIGH ACCURACY DC PERFORMANCE  
0.1% Gain Accuracy (G = 1)  
0.35% Gain Accuracy (G > 1)  
25 ppm Gain Drift (G = 1)  
200 V Max Input Offset Voltage (AD623A)  
2 V/؇C Max Input Offset Drift (AD623A)  
100 V Max Input Offset Voltage (AD623B)  
1 V/؇C Max Input Offset Drift (AD623B)  
25 nA Max Input Bias Current  
common-mode range and can amplify signals that have a  
common-mode voltage 150 mV below ground. Although the  
design of the AD623 has been optimized to operate from a single  
supply, the AD623 still provides superior performance when  
operated from a dual voltage supply (±2.5 V to ±6.0 V).  
NOISE  
35 nV/Hz RTI Noise @ 1 kHz (G = 1)  
EXCELLENT AC SPECIFICATIONS  
90 dB Min CMRR (G = 10); 84 dB Min CMRR (G = 5)  
(@ 60 Hz, 1K Source Imbalance)  
800 kHz Bandwidth (G = 1)  
20 s Settling Time to 0.01% (G = 10)  
Low power consumption (1.5 mW at 3 V), wide supply voltage  
range, and rail-to-rail output swing make the AD623 ideal for  
battery powered applications. The rail-to-rail output stage maxi-  
mizes the dynamic range when operating from low supply volt-  
ages. The AD623 replaces discrete instrumentation amplifier  
designs and offers superior linearity, temperature stability and  
reliability in a minimum of space. Until the AD623, this level of  
instrumentation amplifier performance has not been achieved.  
APPLICATIONS  
Low Power Medical Instrumentation  
Transducer Interface  
Thermocouple Amplifier  
Industrial Process Controls  
Difference Amplifier  
120  
110  
Low Power Data Acquisition  
100  
90  
x1000  
PRODUCT DESCRIPTION  
x100  
The AD623 is an integrated single supply instrumentation am-  
plifier that delivers rail-to-rail output swing on a single supply  
(+3 V to +12 V supplies). The AD623 offers superior user flex-  
ibility by allowing single gain set resistor programming, and  
conforming to the 8-lead industry standard pinout configura-  
tion. With no external resistor, the AD623 is configured for  
unity gain (G = 1) and with an external resistor, the AD623 can  
be programmed for gains up to 1,000.  
80  
70  
60  
50  
40  
30  
x10  
x1  
The AD623 holds errors to a minimum by providing superior  
AC CMRR that increases with increasing gain. Line noise, as  
well as line harmonics, will be rejected since the CMRR re-  
mains constant up to 200 Hz. The AD623 has a wide input  
1
100k  
10  
100  
1k  
10k  
FREQUENCY – Hz  
Figure 1. CMR vs. Frequency, +5 VS, 0 VS  
REV. C  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  

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