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OP497

更新时间: 2024-11-03 22:44:43
品牌 Logo 应用领域
亚德诺 - ADI 运算放大器
页数 文件大小 规格书
12页 300K
描述
Precision Picoampere Input Current Quad Operational Amplifier

OP497 数据手册

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Precision Picoampere Input Current  
Quad Operational Amplifier  
a
OP497  
FEATURES  
PIN CONNECTIONS  
Low Offset Voltage: 50 V max  
Low Offset Voltage Drift: 0.5 V/؇C max  
Very Low Bias Current  
16-Lead Wide Body SOIC  
(S-Suffix)  
25؇C: 100 pA max  
–55؇C to +125؇C: 450 pA max  
OUT D  
–IN D  
+IN D  
OUT A  
–IN A  
1
2
3
4
5
16  
15  
14  
13  
12  
11  
Very High Open-Loop Gain: 2000 V/mV min  
Low Supply Current (per Amplifier): 625 A max  
Operates from ؎2 V to ؎20 V Supplies  
High Common-Mode Rejection: 120 dB min  
+
+
+
+IN A  
V+  
V–  
OP497  
+IN C  
+IN B  
–IN B  
OUT B  
NC  
APPLICATIONS  
+
–IN C  
6
7
8
Strain Gage and Bridge Amplifiers  
High Stability Thermocouple Amplifiers  
Instrumentation Amplifiers  
Photo-Current Monitors  
10 OUT C  
NC  
9
NC = NO CONNECT  
High Gain Linearity Amplifiers  
Long-Term Integrators/Filters  
Sample-and-Hold Amplifiers  
Peak Detectors  
Logarithmic Amplifiers  
Battery-Powered Systems  
14-Lead Plastic Dip  
(P-Suffix)  
14-Lead Ceramic Dip  
(Y-Suffix)  
GENERAL DESCRIPTION  
OUT A  
1
2
3
4
5
6
7
14 OUT D  
The OP497 is a quad op amp with precision performance in the  
space-saving, industry standard 16-lead SOlC package. Its com-  
bination of exceptional precision with low power and extremely  
low input bias current makes the quad OP497 useful in a wide  
variety of applications.  
IN A  
+IN A  
V+  
IN D  
13  
12  
+
+
+IN D  
11 V–  
OP497  
+IN C  
+IN B  
IN B  
OUT B  
10  
9
+
+
IN C  
Precision performance of the OP497 includes very low offset,  
under 50 µV, and low drift, below 0.5 µV/°C. Open-loop gain  
exceeds 2000 V/mV ensuring high linearity in every application.  
Errors due to common-mode signals are eliminated by the OP497’s  
common-mode rejection of over 120 dB. The OP497’s power  
supply rejection of over 120 dB minimizes offset voltage changes  
experienced in battery-powered systems. Supply current of the  
OP497 is under 625 µA per amplifier, and it can operate with  
supply voltages as low as 2 V.  
OUT C  
8
1000  
V
V
= ؎15V  
= 0V  
S
CM  
The OP497 utilizes a superbeta input stage with bias current can-  
cellation to maintain picoamp bias currents at all temperatures.  
This is in contrast to FET input op amps whose bias currents start  
in the picoamp range at 25°C, but double for every 10°C rise in  
temperature, to reach the nanoamp range above 85°C. Input bias  
current of the OP497 is under 100 pA at 25°C and is under 450  
pA over the military temperature range.  
100  
I  
B
+I  
B
I
OS  
10  
Combining precision, low power, and low bias current, the  
OP497 is ideal for a number of applications, including instru-  
mentation amplifiers, log amplifiers, photo-diode preamplifiers,  
and long-term integrators. For a single device, see the OP97; for a  
dual device, see the OP297.  
75  
50  
25  
0
25  
50  
75  
100  
125  
TEMPERATURE –  
C
Input Bias, Offset Current vs. Temperature  
REV. D  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
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  
www.analog.com  
© Analog Devices, Inc., 2002  

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