Low Noise, Low Drift
a
Single-Supply Operational Amplifiers
OP113/OP213/OP413
P IN CO NNECTIO NS
FEATURES
Single- or Dual-Supply Operation
Low Noise: 4.7 nV/ √Hz @ 1 kHz
Wide Bandw idth: 3.4 MHz
Low Offset Voltage: 100 V
Very Low Drift: 0.2 V/ ؇C
Unity Gain Stable
8-Lead Nar r ow-Body SO
8-Lead P lastic D IP
NULL
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
NC
1
NULL
–IN A
+IN A
V–
8
NC
V+
OP113
V+
OUT A
NULL
No Phase Reversal
OUT A
NULL
5
4
NC = NO CONNECT
APPLICATIONS
Digital Scales
OP113
NC = NO CONNECT
Multim edia
Strain Gages
Battery Pow ered Instrum entation
Tem perature Transducer Am plifier
8-Lead P lastic D IP
8-Lead Nar r ow-Body SO
OUT A
1
2
3
4
8
7
6
5
V+
OUT A
–IN A
+IN A
V–
1
8
V+
OUT B
–IN B
+IN B
OP213
–IN A
+IN A
V–
OUT B
–IN B
+IN B
GENERAL D ESCRIP TIO N
5
4
T he OP113 family of single supply operational amplifiers fea-
tures both low noise and drift. It has been designed for sys-
tems with internal calibration. Often these processor-based
systems are capable of calibrating corrections for offset and
gain, but they cannot correct for temperature drifts and noise.
Optimized for these parameters, the OP113 family can be used
to take advantage of superior analog performance combined
with digital correction. Many systems using internal calibration
operate from unipolar supplies, usually either +5 volts or +12
volts. T he OP113 family is designed to operate from single
supplies from +4 volts to +36 volts, and to maintain its low
noise and precision performance.
OP213
14-Lead P lastic D IP
16-Lead Wide-Body SO
1
16
OUT A
–IN A
+IN A
V+
OUT D
–IN D
+IN D
OUT A
–IN A
+IN A
V+
1
2
3
4
OUT D
–IN D
14
13
V–
12 +IN D
OP413
+IN C
+IN B
–IN B
OUT B
NC
OP413
V–
11
10
9
–IN C
T he OP113 family is unity gain stable and has a typical gain
bandwidth product of 3.4 MHz. Slew rate is in excess of 1 V/µs.
Noise density is a very low 4.7 nV/√Hz, and noise in the 0.1 Hz
to 10 Hz band is 120 nV p-p. Input offset voltage is guaranteed
and offset drift is guaranteed to be less than 0.8 µV/°C. Input
common-mode range includes the negative supply and to within
1 volt of the positive supply over the full supply range. Phase
reversal protection is designed into the OP113 family for cases
where input voltage range is exceeded. Output voltage swings
also include the negative supply and go to within 1 volt of the
positive rail. T he output is capable of sinking and sourcing
current throughout its range and is specified with 600 Ω loads.
+IN B
–IN B
OUT B
+IN C
–IN C
OUT C
5
6
OUT C
NC
8
9
NC = NO CONNECT
7
8
D/A sigma-delta converters. Often these converters have high
resolutions requiring the lowest noise amplifier to utilize their
full potential. Many of these converters operate in either single
supply or low supply voltage systems, and attaining the greater
signal swing possible increases system performance.
T he OP113 family is specified for single +5 volt and dual ±15
volt operation over the XIND—extended industrial (–40°C to
+85°C) temperature range. T hey are available in plastic and
SOIC surface mount packages.
Digital scales and other strain gage applications benefit from the
very low noise and low drift of the OP113 family. Other appli-
cations include use as a buffer or amplifier for both A/D and
REV. C
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 781/ 329-4700
Fax: 781/ 326-8703
World Wide Web Site: http:/ / w w w .analog.com
© Analog Devices, Inc., 1998
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