op497fy Analog Devices, Inc., op497fy Datasheet

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op497fy

Manufacturer Part Number
op497fy
Description
Precision Picoampere Input Current Quad Operational Amplifier
Manufacturer
Analog Devices, Inc.
Datasheet
a
GENERAL DESCRIPTION
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 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.
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.
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.
Precision Picoampere Input Current
1000
100
10
Quad Operational Amplifier
–75
OUT A
OUT B
–IN A
+IN A
+IN B
–50
–IN B
OUT A
OUT B
–IN A
+IN A
+IN B
–IN B
NC
V+
16-Lead Wide Body SOIC
V+
PIN CONNECTIONS
14-Lead Ceramic Dip
1
2
3
4
5
6
7
8
14-Lead Plastic Dip
–25
1
2
3
4
5
6
7
NC = NO CONNECT
– +
– +
(P-Suffix)
(Y-Suffix)
(S-Suffix)
TEMPERATURE – C
– +
– +
OP497
OP497
0
+
+
25
+
+
–I
B
50
14
13
12
11
10
9
8
16
15
14
13
12
11
10
I
9
+I
OS
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
B
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
NC
75
V
V
OP497
CM
S
=
= 0V
15V
100
125

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op497fy Summary of contents

Page 1

GENERAL DESCRIPTION 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 ...

Page 2

OP497–SPECIFICATIONS Parameter Symbol INPUT CHARACTERISTICS Offset Voltage Vos Average Input Offset Voltage Drift TCV OS Long-Term Input Offset Voltage Stability Input Bias Current I B Average Input Bias Current Drift TC IB Input Offset Current Ios Average Input Offset Current ...

Page 3

ABSOLUTE MAXIMUM RATINGS Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 ...

Page 4

OP497–Typical Performance Characteristics 15V –100 –80 –60 –40 – 100 INPUT OFFSET VOLTAGE – ...

Page 5

20V S 100 CURRENT NOISE VOLTAGE NOISE 100 1000 FREQUENCY – Hz 100 V = 15V 30pF ...

Page 6

OP497 + –0.5 –1.0 –1.5 1.5 1.0 0.5 – SUPPLY VOLTAGE – V 700 NO LOAD +125 C 600 +25 C 500 –55 C 400 300 200 0 ...

Page 7

APPLICATIONS INFORMATION Extremely low bias current over the full military temperature range makes the OP497 attractive for use in sample-and-hold amplifiers, peak detectors, and log amplifiers that must operate over a wide temperature range. Balancing input resistances is not necessary ...

Page 8

OP497 OPEN-LOOP GAIN LINEARITY The OP497 has both an extremely high gain of 2000 V/mv mini- mum and constant gain linearity. This enhances the precision of the OP497 and provides for very high accuracy in high closed-loop gain applications. Figure ...

Page 9

V REF 2.5 V REF43 OP497 + OUT 1/4 7 OP497 5 4 –5V NONLINEAR CIRCUITS Due to its low input bias currents, ...

Page 10

OP497 OP497 SPICE MACRO-MODEL Figure 12 and Table I show the node and net list for a SPICE macro-model of the OP497. The model is a simplified version of the actual device and simulates important dc parameters such as V ...

Page 11

Node assignments noninverting input inverting input positive supply negative supply SUBCKT OP497 INPUT STAGE AND POLE AT 6 MHz RIN1 1 7 2500 RIN2 2 8 2500 6.782E8 6.782E8 ...

Page 12

Ceramic DIP (Y-Suffix) 0.005 (0.13) 0.098 (2.49) MIN MAX 14 8 PIN 0.060 (1.52) 0.015 (0.38) 0.785 (19.94) MAX 0.200 (5.08) MAX 0.150 (3.81) MIN 0.200 (5.08) 0.125 (3.18) 0.023 (0.58) 0.100 0.070 (1.78) 0.014 (0.36) ...

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