ANALOG DEVICES OP470 Service Manual
Very Low Noise Quad
–
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a
FEATURES
Very Low-Noise, 5 nV/÷Hz @ 1 kHz Max
Excellent Input Offset Voltage, 0.4 mV Max
Low Offset Voltage Drift, 2 V/C Max
Very High Gain, 1000 V/mV Min
Outstanding CMR, 110 dB Min
Slew Rate, 2 V/s Typ
Gain-Bandwidth Product, 6 MHz Typ
Industry Standard Quad Pinouts
Available in Die Form
GENERAL DESCRIPTION
The OP470 is a high-performance monolithic quad operational
amplifier with exceptionally low voltage noise, 5 nV/÷Hz at
1 kHz max, offering comparable performance to ADI’s industry
standard OP27.
The OP470 features an input offset voltage below 0.4 mV,
excellent for a quad op amp, and an offset drift under 2 mV/∞C,
guaranteed over the full military temperature range. Open loop
gain of the OP470 is over 1,000,000 into a 10 kW load ensuring
excellent gain accuracy and linearity, even in high gain applications. Input bias current is under 25 nA, which reduces errors
due to signal source resistance. The OP470’s CMR of over 110
dB and PSRR of less than 1.8 mV/V significantly reduce errors
due to ground noise and power supply fluctuations. Power
consumption of the quad OP470 is half that of four OP27s, a
significant advantage for power conscious applications. The
OP470 is unity-gain stable with a gain bandwidth product of
6 MHz and a slew rate of 2 V/ms.
Operational Amplifier
OP470
PIN CONNECTIONS
14-Lead Hermetic DIP
(Y-Suffix)
14-Lead Plastic DIP
(P-Suffix)
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B
1
2
3
4
V+
OP470
5
6
7
14
13
12
11
10
9
8
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
The OP470 offers excellent amplifier matching which is important for applications such as multiple gain blocks, low noise
instrumentation amplifiers, quad buffers, and low noise active
filters.
The OP470 conforms to the industry standard 14-lead DIP
pinout. It is pin compatible with the LM148/149, HA4741,
HA5104, and RM4156 quad op amps and can be used to upgrade systems using these devices.
For higher speed applications, the OP471, with a slew rate of 8
V/ms, is recommended.
16-Lead SOIC Package
(S-Suffix)
1
OUT A OUT D
2
–IN A –IN D
3
+IN A +IN D
4
V+ V–
OP470
5
+IN B +IN C
6
–IN B –IN C
7
OUT B OUT C
8
NC NC
NC = NO CONNECT
16
15
14
13
12
11
10
9
SIMPLIFIED SCHEMATIC
IN
+IN
REV. B
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.
V+
BIAS
V–
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 © Analog Devices, Inc., 2002
OP470–SPECIFICATIONS
www.BDTIC.com/ADI
ELECTRICAL CHARACTERISTICS
(at VS = 15 V, TA = 25C, unless otherwise noted.)
OP470A/E OP470F OP470G
Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Unit
INPUT OFFSET
VOLTAGE V
OS
0.1 0.4 0.2 0.8 0.4 1.0 mV
INPUT OFFSET
CURRENT I
OS
VCM = 0 V 3 10 6 20 12 30 nA
INPUT BIAS
CURRENT I
B
VCM = 0 V 6 25 15 50 25 60 nA
INPUT NOISE
VOLTAGE e
np-p
0.1 Hz to 10 Hz 80 200 80 200 80 200 nV p-p
(Note 1)
INPUT NOISE f
Voltage Density e
n
= 10 Hz 3.8 6.5 3.8 6.5 3.8 6.5
O
fO = 100 Hz 3.3 5.5 3.3 5.5 3.3 5.5 nV÷Hz
f
1 kHz 3.2 5.0 3.2 5.0 3.2 5.0
O =
(Note 2)
INPUT NOISE f
Current Density i
n
= 10 Hz 1.7 1.7 1.7
O
fO = 100 Hz 0.7 0.7 0 7 pA÷Hz
fO = 1 kHz 0.4 0.4 0.4
LARGE-SIGNAL V = ± 10 V
Voltage Gain A
VO
RL = 10 kW 1000 2300 800 1700 800 1700 V/mV
RL = 2 kW 500 1200 400 900 400 900
INPUT VOLTAGE
RANGE IVR (Note 3) ± 11 ± 12 ± 11 ±12 ± 11 ± 12 V
OUTPUT VOLTAGE
SWING V
O
RL ≥ 2 kW±12 ± 13 ± 12 ± 13 ± 12 ± 13 V
COMMON-MODE
REJECTION CMR V
= ± 11 V 110 125 100 120 100 120 dB
CM
POWER SUPPLY
REJECTION RATIO PSRR VS = ± 4.5 V to ± 18 V 0.56 1.8 1.0 5.6 1.0 5.6 mV/V
SLEW RATE SR 1.4 2 1.4 2 1.4 2 V/ms
SUPPLY CURRENT
(All Amplifiers) I
SY
No Load 9 11911911mA
GAIN BANDWIDTH
PRODUCT GBW AV = 10 666MHz
CHANNEL
SEPARATION CS VO = 20 V p-p 125 155 125 155 125 155 dB
fO = 10 Hz (Note 1)
INPUT
CAPACITANCE C
INPUT RESISTANCE R
IN
IN
222pF
0.4 0.4 0.4 MW
Differential-Mode
INPUT RESISTANCE
Common-Mode R
SETTLING TIME t
INCM
S
= 1
A
V
to 0.1% 5.5 5.5 5.5 ms
11 11 11 GW
to 0.01 % 6.0 6.0 6.0
NOTES
1
Guaranteed but not 100% tested
2
Sample tested
3
Guaranteed by CMR test
–2–
REV. B
OP470
www.BDTIC.com/ADI
ELECTRICAL CHARACTERISTICS
(at VS = 15 V, –55C £ TA £ 125C for OP470A, unless otherwise noted.)
OP470A
Parameter Symbol Conditions Min Typ Max Unit
INPUT OFFSET VOLTAGE V
OS
0.14 0.6 mV
AVERAGE INPUT
Offset Voltage Drift TCV
INPUT OFFSET CURRENT I
INPUT BIAS CURRENT I
OS
OS
B
LARGE-SIGNAL V
Voltage Gain A
VO
VCM = 0 V 5 20 nA
VCM = 0 V 15 20 nA
= ± 10 V
O
RL = 10 kW 750 1600 V/mV
0.4 2 mV/∞C
RL = 2 kW 400 800
INPUT VOLTAGE RANGE*IVR ± 11 ± 12 V
OUTPUT VOLTAGE SWING V
O
RL ≥ 2 kW±12 ± 13 V
COMMON-MODE
REJECTION CMR V
= ± 11 V 100 120 dB
CM
POWER SUPPLY
REJECTION RATIO PSRR VS = ± 4.5 V to ± 18 V 1.0 5.6 mV/V
SUPPLY CURRENT
(All Amplifiers) I
*
Guaranteed by CMR test
SY
No Load — 9.2 11 mA
(at VS = 15 V, –25C £ TA £ 85C for OP470E/OP470EF, –40C £ TA £ 85C for OP470G,
ELECTRICAL CHARACTERISTICS
unless otherwise noted.)
OP470E OP470F OP470G
Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Unit
INPUT OFFSET
VOLTAGE V
OS
0.12 0.5 0.24 1.0 0.5 1.5 mV
AVERAGE INPUT
Offset Voltage Drift TCV
OS
0.4 2 0.6 4 2 mV/∞C
INPUT OFFSET
CURRENT I
OS
VCM = 0 V 4 20 7 40 20 50 nA
INPUT BIAS
CURRENT I
B
LARGE-SIGNAL V
Voltage Gain A
VO
VCM = 0 V 11 50 2070 4075 nA
= ± 10 V
O
RL = 10 kW 800 1800 600 1400 600 1500 V/mV
RL = 2 kW 400 900 300 700 300 800
INPUT VOLTAGE
RANGE
*
IVR ± 11 ± 12 ± 11 ± 12 ± 11 ± 12 V
OUTPUT VOLTAGE
SWING V
O
RL ≥ 2 kW±12 ± 13 ± 12 ± 13 ± 12 ± 13 V
COMMON-MODE
REJECTION CMR V
= ± 11 V 100 120 90 115 90 110 dB
CM
POWER SUPPLY
REJECTION RATIO PSRR VS = ± 4.5 V to ± 18 V 0.7 5.6 1.8 10 1.8 10 mV/V
SUPPLY CURRENT
(All Amplifiers) I
*
Guaranteed by CMR test
SY
No Load — 9.2 11 — 9.2 11 — 9.3 11 mA
REV. B
–3–
OP470–SPECIFICATIONS
www.BDTIC.com/ADI
WAFER TEST LIMITS
Parameter Symbol Conditions Limit Unit
INPUT OFFSET VOLTAGE V
INPUT OFFSET CURRENT I
INPUT BIAS CURRENT I
LARGE-SIGNAL V
Voltage Gain A
INPUT VOLTAGE RANGE*IVR ± 11 V Min
OUTPUT VOLTAGE SWING V
COMMON-MODE
REJECTION CMR V
POWER SUPPLY
REJECTION RATIO PSRR VS = ± 4.5 V to ± 18 V 5.6 mV/V Max
SUPPLY CURRENT
(All Amplifiers) I
NOTE
*
Guaranteed by CMR test
Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for standard product dice. Consult factory to negotiate specifications based on dice lot qualification through sample lot assembly and testing.
(at VS = 15 V, 25C, unless otherwise noted.)
OS
OS
B
VO
O
SY
VCM = 0 V 20 nA Max
VCM = 0 V 50 nA Min
= ± 10 V
O
RL = 10 kW 800 V/mV Min
RL = 2 kW 400
RL ≥ 2 kW±12 V Min
= ± 11 V 100 dB
CM
No Load 11 mA Max
OP470GBC
0.8 mV Max
–4–
REV. B
OP470
WARNING!
ESD SENSITIVE DEVICE
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ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V
Differential Input Voltage
Differential Input Current
2
. . . . . . . . . . . . . . . . . . . . . . ± 1.0 V
2
. . . . . . . . . . . . . . . . . . . . ± 25 mA
1
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . Supply Voltage
Output Short-Circuit Duration . . . . . . . . . . . . . . . Continuous
Storage Temperature Range
P, Y Package . . . . . . . . . . . . . . . . . . . . . . –65∞C to +150∞C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300∞C
Junction Temperature (T
) . . . . . . . . . . . . . –65∞C to +150∞C
j
Operating Temperature Range
OP470A . . . . . . . . . . . . . . . . . . . . . . . . . –55∞C to +125∞C
OP470E, OP470F . . . . . . . . . . . . . . . . . . . –25∞C to +85∞C
OP470G . . . . . . . . . . . . . . . . . . . . . . . . . . –40∞C to +85∞C
ORDERING GUIDE
Package Options
T
= 25∞C Operating
A
V
max Cerdip Temperature
OS
(V) 14-Pin Plastic Range
400 MIL
400 OP470AY* MIL
400 OP470EY IND
800 OP470FY* IND
1000 OP470GP XIND
1000 OP470GS XIND
*Not for new design; obsolete April 2002.
For military processed devices, please refer to the standard
Microcircuit Drawing (SMD) available at
www.dscc.dla.mil/programs/milspec/default.asp
SMD Part Number ADI Equivalent
59628856501CA OP470AYMDA
596288565012A OP470ARCMDA
596288565013A
*
Not for new designs; obsolete April 2002.
*
OP470ATCMDA
Package Type
3
JA
JC
Unit
14-Lead Hermetic DIP(Y) 94 10 ∞C/W
14-Lead Plastic DIP(P) 76 33 ∞C/W
16-Lead SOIC (S) 88 23 ∞C/W
NOTES
1
Absolute Maximum Ratings apply to both DICE and packaged parts, unless
otherwise noted.
2
The OP470’s inputs are protected by back-to-back diodes. Current limiting
resistors are not used in order to achieve low noise performance. If differential
voltage exceeds ± 1.0 V, the input current should be limited to ± 25 mA.
3
is specified for worst case mounting conditions, i.e., JA is specified for device
JA
in socket for TO, CerDIP, PDIP, packages; JA is specified for device soldered to
printed circuit board for SOIC packages.
–IN B
OUT B
OUT C
+IN B
–IN C
+IN C V– +IN D
DIE SIZE 0.163 0.106 INCH, 17,278 SQ. mm
(4.14 2.69 mm, 11.14 SQ. mm)
+IN AV+
–IN A
OUT A
OUT D
–IN D
Figure 1. Dice Characteristics
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the OP470 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
REV. B
–5–
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