OP37FP AD [Analog Devices], OP37FP Datasheet

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OP37FP

Manufacturer Part Number
OP37FP
Description
Low Noise, Precision, High Speed Operational Amplifier
Manufacturer
AD [Analog Devices]
Datasheet

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a
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.
REV. A
GENERAL DESCRIPTION
The OP37 provides the same high performance as the OP27,
but the design is optimized for circuits with gains greater than
five. This design change increases slew rate to 17 V/µs and
gain-bandwidth product to 63 MHz.
The OP37 provides the low offset and drift of the OP07
plus higher speed and lower noise. Offsets down to 25 µV and
drift of 0.6 µV/°C maximum make the OP37 ideal for preci-
sion instrumentation applications. Exceptionally low noise
(e
2.7 Hz, and the high gain of 1.8 million, allow accurate
high-gain amplification of low-level signals.
The low input bias current of 10 nA and offset current of 7 nA
are achieved by using a bias-current cancellation circuit. Over
the military temperature range this typically holds I
to 20 nA and 15 nA respectively.
n
= 3.5 nV/ @ 10 Hz), a low 1/f noise corner frequency of
NON-INVERTING
√Hz
INVERTING
INPUT (+)
INPUT (–)
R1 AND R2 ARE PERMANENTLY
ADJUSTED AT WAFER TEST FOR
MINIMUM OFFSET VOLTAGE.
Q6
Q3
Q1A
R1
R3
Q1B
V
1
OS
ADJ.
8
Q2B
SIMPLIFIED SCHEMATIC
B
Q2A
R4
R2
and I
OS
Q11
Low Noise, Precision, High Speed
Q21
Q12
Operational Amplifier (A
The output stage has good load driving capability. A guaranteed
swing of 10 V into 600 Ω and low output distortion make the
OP37 an excellent choice for professional audio applications.
PSRR and CMRR exceed 120 dB. These characteristics, coupled
with long-term drift of 0.2 µV/month, allow the circuit designer
to achieve performance levels previously attained only by
discrete designs.
Low-cost, high-volume production of the OP37 is achieved by
using on-chip zener-zap trimming. This reliable and stable offset
trimming scheme has proved its effectiveness over many years of
production history.
The OP37 brings low-noise instrumentation-type performance to
such diverse applications as microphone, tapehead, and RIAA
phono preamplifiers, high-speed signal conditioning for data
acquisition systems, and wide-bandwidth instrumentation.
Q27
Q23
C2
R23
R5
R24
Q24
Q28
V
OS
Q22
C3
TRIM
8-Lead Hermetic DIP
PIN CONNECTIONS
+IN
–IN
V–
R9
R12
Epoxy Mini-DIP
NC = NO CONNECT
1
2
3
4
C1
8-Lead SO
C4
(Z Suffix)
(P Suffix)
(S Suffix)
Q26
OP37
Q20
Q19
8
7
6
5
V
V+
OUT
NC
OS
Q46
Q45
TRIM
V+
OUTPUT
V–
VCL
OP37
> 5)

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OP37FP Summary of contents

Page 1

GENERAL DESCRIPTION The OP37 provides the same high performance as the OP27, but the design is optimized for circuits with gains greater than five. This design change increases slew rate to 17 V/µs and gain-bandwidth product to 63 ...

Page 2

... Not for new design, obsolete, April 2002. Unit °C/W °C/W °C/W is specified for device JA is specified for device JA ORDERING GUIDE Operating CerDIP Plastic Temperature 8-Lead 8-Lead Range OP37AZ MIL OP37EZ OP37EP IND/COM OP37FP IND/COM OP37GP XIND OP37GZ OP37GS XIND WARNING! ESD SENSITIVE DEVICE ...

Page 3

SPECIFICATIONS ( Parameter Symbol Conditions Input Offset Voltage V Note 1 OS Long-Term Stability V /Time Notes Input Offset Current I OS Input Bias Current I B Input Noise Voltage ...

Page 4

OP37–SPECIFICATIONS Electrical Characteristics Parameter Symbol Conditions Input Offset Voltage V Note 1 OS Average Input Offset Drift TCV Note 2 OS TCV Note 3 OSN Input Offset Current I OS Input Bias Current I B Input Voltage Range IVR Common ...

Page 5

Wafer Test Limits unless otherwise noted.) Parameter Symbol Conditions Input Offset Voltage V Note 1 OS Input Offset Current I OS Input Bias Current I B Input Voltage Range IVR Common Mode = ± ...

Page 6

OP37 Typical Electrical Characteristics Parameter Symbol Conditions Average Input Offset Voltage Drift TCV or Nulled or OS TCV Unnulled OSN kΩ kΩ Average Input Offset Current Drift TCI OS Average Input Bias Current Drift ...

Page 7

TEST TIME OF 10sec MUST BE USED TO LIMIT LOW FREQUENCY 40 (<0.1Hz) GAIN. 30 0.01 0 100 FREQUENCY – 15V S 1 ...

Page 8

OP37 60 OP37C 50 OP37B 40 30 OP37A 20 10 OP37B OP37A 0 –10 OP37A –20 –30 OP37B –40 TRIMMING WITH 10k POT DOES –50 NOT CHANGE –60 TCV OS OP37C –70 –75 –50 – 100 ...

Page 9

2 1 1.0 0 TOTAL SUPPLY VOLTAGE – Volts 15V ...

Page 10

OP37 0.1 F 100k OP37 10 D.U.T. 2k VOLTAGE GAIN 22 F 4.3k = 50,000 OP12 SCOPE 4 100k 2.2 F 110k 0.1 F 24.3k 160 140 120 100 NEGATIVE ...

Page 11

APPLICATIONS INFORMATION OP37 Series units may be inserted directly into 725 and OP07 sockets with or without removal of external compensation or nulling components. Additionally, the OP37 may be fitted to unnulled 741type sockets; however, if conventional 741 nulling circuitry ...

Page 12

OP37 140 120 100 100 , S 1k UNBALANCED 100 1k 10k FREQUENCY – Hz Comments on Noise The OP37 is a very low-noise monolithic op amp. The outstanding input ...

Page 13

Table I. TBD Source Device Impedance Comments <500 Ω Straln Gauge Typically used in low-frequency applications. <1500 Ω Magnetic Low I B Tapehead set-magnetization problems when direct coupling is used. OP37 I can be neglected. B <1500 Ω Magnetic Similar ...

Page 14

OP37 OP37 are free of bias-current transients upon power up or power down. However always advantageous to control the speed of power supply rise and fall, to eliminate transients. In addition, the dc resistance of the head should ...

Page 15

OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead Hermetic DIP (Z Suffix) 0.005 (0.13) 0.055 (1.4) MIN MAX 8 5 0.310 (7.87) 0.220 (5.59) PIN 0.100 (2.54) BSC 0.320 (8.13) 0.405 (10.29) MAX 0.290 (7.37) 0.060 ...

Page 16

OP37 Revision History Location Data Sheet changed from REV REV. C. Edits to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . ...

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