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OP497GP Datasheet

  • OP497GP

  • Precision Picoampere Input Current Quad Operational Amplifie...

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a
FEATURES
Low Offset Voltage: 50 V max
Low Offset Voltage Drift: 0.5 V/ C max
Very Low Bias Current
25 C: 100 pA max
鈥?5 C to +125 C: 450 pA max
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
APPLICATIONS
Strain Gage and Bridge Amplifiers
High Stability Thermocouple Amplifiers
Instrumentation Amplifiers
Photo-Current Monitors
High Gain Linearity Amplifiers
Long-Term Integrators/Filters
Sample-and-Hold Amplifiers
Peak Detectors
Logarithmic Amplifiers
Battery-Powered Systems
GENERAL DESCRIPTION
Precision Picoampere Input Current
Quad Operational Amplifier
OP497
PIN CONNECTIONS
16-Lead Wide Body SOIC
(S-Suffix)
OUT A 1
鈥揑N A 2
+IN A 3
V+ 4
+IN B 5
鈥揑N B 6
OUT B 7
NC 8
NC = NO CONNECT
鈥?/div>
+
+
鈥?/div>
鈥?/div>
+
+
鈥?/div>
16 OUT D
15 鈥揑N D
14 +IN D
OP497
13 V鈥?/div>
12 +IN C
11 鈥揑N C
10 OUT C
9 NC
14-Lead Plastic Dip
(P-Suffix)
14-Lead Ceramic Dip
(Y-Suffix)
OUT A 1
鈥揑N A 2
+IN A 3
V+ 4
+IN B 5
鈥揑N B 6
OUT B 7
鈥?/div>
+
+
鈥?/div>
鈥?/div>
+
+
鈥?/div>
14 OUT D
13 鈥揑N D
12 +IN 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.
Precision performance of the OP497 includes very low offset,
under 50
碌V,
and low drift, below 0.5
碌V/擄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鈥檚
common-mode rejection of over 120 dB. The OP497鈥檚 power
supply rejection of over 120 dB minimizes offset voltage changes
experienced in battery-powered systems. Supply current of the
OP497 is under 625
碌A(chǔ)
per amplifier, and it can operate with
supply voltages as low as
鹵
2 V.
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擄C, but double for every 10擄C rise in
temperature, to reach the nanoamp range above 85擄C. Input bias
current of the OP497 is under 100 pA at 25擄C and is under 450
pA over the military temperature range.
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.
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, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
OP497
11 V鈥?/div>
10 +IN C
9 鈥揑N C
8 OUT C
1000
INPUT CURRENT 鈥?PA
V
S
= 15V
V
CM
= 0V
100
鈥揑
B
+I
B
I
OS
10
鈥?5
鈥?0
鈥?5
0
25
50
75
100
125
TEMPERATURE 鈥?C
Input Bias, Offset Current vs. Temperature
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 2002

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