ANALOG DEVICES OP490 Service Manual
Low Voltage, Micropower,
FEATURES
Single/dual-supply operation
1.6 V to 36 V
±0.8 V to ±18 V
Single-supply operation; input and output
voltage ranges include ground
Low supply current: 80 μA maximum
High output drive: 5 mA minimum
Low offset voltage: 1.0 mV maximum
High open-loop gain: 800 V/mV typical
Industry-standard quad pinouts
Quad Operational Amplifier
OP490
FUNCTIONAL BLOCK DIAGRAMS
1
OUT A
2
–IN A
3
+IN A
4
V+
OP490
5
+IN B
6
–IN B
7
OUT B
TOP VIEW
(Not to Scale)
Figure 1. 14-Lead Plastic DIP
(P-Suffix)
1
OUT A
2
–IN A
3
+IN A
4
V+
OP490
5
+IN B
6
–IN B
7
OUT B
TOP VIEW
8
NC
(Not to Scale)
NC = NO CONNECT
Figure 2. 16-Lead SOIC
(S-Suffix)
14
13
12
11
10
16
15
14
13
12
10
9
8
11
9
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
NC
00308-001
00308-002
GENERAL DESCRIPTION
The OP490 is a high performance micropower quad op amp
that operates from a single supply of 1.6 V to 36 V or from dual
supplies of ±0.8 V to ±18 V. The input voltage range includes
the negative rail allowing the OP490 to accommodate input
signals down to ground in single-supply operation. The output
swing of the OP490 also includes ground when operating from
a single supply, enabling zero-in, zero-out operation.
The quad OP490 draws less than 20 μA of quiescent supply
current per amplifier, but each amplifier is able to deliver over
5 mA of output current to a load. Input offset voltage is under
0.5 mV. Gain exceeds over 400,000 and CMR is better than
90 dB. A PSRR of under 5.6 μV/V minimizes offset voltage
changes experienced in battery-powered systems.
The quad OP490 combines high performance with the space
and cost savings of quad amplifiers. The minimal voltage and
current requirements of the OP490 make it ideal for battery and
solar-powered applications, such as portable instruments and
remote sensors.
Rev. E
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©1987–2010 Analog Devices, Inc. All rights reserved.
OP490
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagrams ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings ............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Applications Information ................................................................ 9
REVISION HISTORY
5/10—Rev. D to Rev. E
Changes to Features Section............................................................ 1
Changes to Figure 24 ...................................................................... 12
7/09—Rev. C to Rev. D
Deleted 14-Lead CERDIP (Y-Suffix) ............................... Universal
Deleted Figure 1, Renumbered Figures Sequentially ................... 1
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 4
Changes to Figure 16 ........................................................................ 8
Updated Outline Dimensions ....................................................... 14
Changes to Ordering Guide .......................................................... 15
4/02—Rev. B to Rev. C
Deleted 28-Pin LCC (TC-Suffix) Pin Connection Diagram ...... 1
Deleted Electrical Characteristics .................................................. 3
Edits to Absolute Maximum Ratings ............................................ 6
Edits to Ordering Guide ............................................................... 16
Battery-Powered Applications .....................................................9
Single-Supply Output Voltage Range..........................................9
Input Voltage Protection ........................................................... 10
Micropower Voltage-Controlled Oscillator ............................ 10
Micropower Single-Supply Quad Voltage-Output 8-Bit DAC
....................................................................................................... 11
High Output Amplifier .............................................................. 12
Single-Supply Micropower Quad Programmable Gain
Amplifier ..................................................................................... 12
Outline Dimensions ....................................................................... 14
Ordering Guide .......................................................................... 15
Rev. E | Page 2 of 16
OP490
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
@ VS = ±1.5 V to ±15 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Input Offset Voltage VOS 0.6 1.0 mV
Input Offset Current IOS VCM = 0 V 0.4 5 nA
Input Bias Current IB V
Large Signal Voltage Gain AVO V
R
R
R
V+ = 5 V, V− = 0 V, 1 V < VO < 4 V
R
R
Input Voltage Range1 IVR V+ = 5 V, V− = 0 V 0 4 V
Common-Mode Rejection Ratio CMRR V+ = 5 V, V− = 0 V, 0 V < VCM < 4 V 80 100 dB
V
Input Resistance Differential Mode RIN VS = ±15 V 30 MΩ
Input Resistance Common-Mode R
VS = ±15 V 20 GΩ
INCM
OUTPUT CHARACTERISTICS
Output Voltage Swing VO L V
V
Output Voltage High VOH V+ = 5 V, V− = 0 V, RL = 2 kΩ 4.0 4.2 V
Output Voltage Low VOL V+ = 5 V, V− = 0 V, RL = 10 kΩ 100 500 μV
Capacitive Load Stability AV = 1 650 pF
DYNAMIC PERFORMANCE
Slew Rate SR VS = ±15 V 5 12 V/ms
Channel Separation2 CS fO = 10 Hz, VO = 20 V p-p, VS = ±15 V 120 150 dB
Gain Bandwidth Product GBWP AV = 1 20 kHz
POWER SUPPLY
Power Supply Rejection Ratio PSRR 3.2 10 μV/V
Supply Current (All Amplifiers) ISY VS = ±1.5 V, no load 40 60 μA
V
NOISE PERFORMANCE
Voltage Noise en p-p fO = 0.1 Hz to 10 Hz, VS = ±15 V 3 μV p-p
Voltage Noise Density en f = 1 kHz 60 nV/√Hz
Current Noise Density in f = 1 kHz 0.07 pA/√Hz
1
Guaranteed by CMRR test.
2
Guaranteed but not 100% tested.
= 0 V 4.2 25 nA
CM
= ±15 V, VO = ±10 V
S
= 100 kΩ 400 800 V/mV
L
= 10 kΩ 200 400 V/mV
L
= 2 kΩ 100 200 V/mV
L
= 100 kΩ 100 250 V/mV
L
= 10 kΩ 70 140 V/mV
L
= ±15 V, −15 V < VCM < +13.5 V 90 120 dB
S
= ±15 V, RL = 10 kΩ ±13.5 ±14.2 V
S
= ±15 V, RL = 2 kΩ ±10.5 ±11.5 V
S
= ±15 V, no load 60 80 μA
S
Rev. E | Page 3 of 16
OP490
–
V
@ VS = ±1.5 V to ±15 V, −40°C ≤ TA ≤ +85°C
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Input Offset Voltage V
Average Input Offset Voltage Drift TCVOS VS = ±15 V 4 μV/°C
Input Offset Current IOS VCM = 0 V 1.3 7 nA
Input Bias Current IB VCM = 0 V 4.4 25 nA
Large Signal Voltage Gain AVO VS = ±15 V, VO = ±10 V
R
R
R
V+ = 5 V, V− = 0 V, 1 V < VO < 4 V
R
R
Input Voltage Range1 IVR V+ = 5 V, V− = 0 V 0.3 5 V
−15 +13.5 V
Common-Mode Rejection Ratio CMRR V+ = 5 V, V− = 0 V, 0 V < VCM < 3.5 V 80 100 dB
V
OUTPUT CHARACTERISTICS
Output Voltage Swing VO VS = ±15 V ±13 ±14 V
R
Output Voltage High VOH V+ = 5 V, V− = 0 V, RL = 2 kΩ 3.9 4.1 V
Output Voltage Low VOL V+ = 5 V, V− = 0 V, RL = 10 kΩ 100 500 μV
POWER SUPPLY
Power Supply Rejection Ratio PSRR 5.6 17.8 μV/V
Supply Current (All Amplifiers) ISY V
V
1
Guaranteed by CMRR test.
0.8 1.5 mV
OS
= 100 kΩ 300 600 V/mV
L
= 10 kΩ 150 250 V/mV
L
= 2 kΩ 75 125 V/mV
L
= 100 kΩ 80 160 V/mV
L
= 10 kΩ 40 90 V/mV
L
= ±15 V, −15 V < VCM < +13.5 V 90 110 dB
S
= 2 kΩ ±10 ±11 V
L
= ±1.5 V, no load 60 100 mA
S
= ±15 V, no load 75 120 mA
S
+
+IN
IN
Figure 3. Simplified Schematic
Rev. E | Page 4 of 16
OUTPUT
V–
00308-003
OP490
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter Rating
Supply Voltage ±18 V
Digital Input Voltage [(V−) − 20 V] to [(V+) + 20 V]
Common-Mode Input Voltage [(V−) − 20 V] to [(V+) + 20 V]
Output Short-Circuit Duration Continuous
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −40°C to +85°C
Junction Temperature (TJ) Range −65°C to +150°C
Lead Temperature (Soldering,
60 sec)
300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θJA is specified for worst-case mounting conditions, that is, θJA is
specified for a device in socket for the PDIP package; θ
is
JA
specified for a device soldered to a printed circuit board (PCB)
for the SOIC package.
Table 4.
Package Type θJA θ
14-Lead PDIP_N (S-Suffix) 76 33 °C/W
16-Lead SOIC_R (S-Suffix) 92 27 °C/W
Unit
JC
ESD CAUTION
Rev. E | Page 5 of 16
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