AD OP490

PIN CONNECTION
14-Pin Hermetic DIP (Y-Suffix)
14-Pin Plastic DIP (P-Suffix)
OUT A
1
14 OUT D
–IN A
2
13 –IN D
+IN A
3
12 +IN D
11 V–
V+ 4
+IN B 5
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
GENERAL DESCRIPTION
16-Pin SOL (S-Suffix)
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. Input voltage range includes
the negative rail allowing the OP490 to accommodate input signals down to ground in single-supply operation. The OP490’s
output swing also includes ground when operating from a single
supply, enabling “zero-in, zero-out” operation.
16 OUT D
OUT A 1
–IN A
2
15 –IN D
+IN A 3
14 +IN D
V+ 4
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 with offset drift below 5 µV/°C over the military temperature range. Gain exceeds over 700,000 and CMR is better
than 100 dB. A PSRR of under 5.6 µV/V minimizes offset voltage changes experienced in battery powered systems.
13 V–
+IN B 5
12 +IN C
–IN B
11 –IN C
6
OUT B 7
10 OUT C
9
NC 8
NC
NC = NO CONNECT
NC
OUT D
–IN D
NC
4
–IN A
28-Pin LCC (TC-Suffix)
The quad OP490 combines high performance with the space
and cost savings of quad amplifiers. The minimal voltage and
current requirements of the OP490 makes it ideal for battery
and solar powered applications, such as portable instruments
and remote sensors.
OUT A
FEATURES
Single/Dual Supply Operation
+1.6 V to +36 V
60.8 V to 618 V
True Single-Supply Operation; Input and Output
Voltage Ranges Include Ground
Low Supply Current: 80 mA max
High Output Drive: 5 mA min
Low Offset Voltage: 0.5 mA max
High Open-Loop Gain: 700 V/mV min
Outstanding PSRR: 5.6 mV/V min
Industry Standard Quad Pinouts
Available in Die Form
NC
a
Low Voltage Micropower
Quad Operational Amplifier
OP490
3
2
1
28 27
26
25 NC
NC 5
24 +IN D
+IN A 6
NC 7
23 NC
V+ 8
22 V–
21 NC
NC 9
20 +IN C
+IN B 10
19 NC
13
14
15
16
17
18
–IN B
NC
OUT C
–IN C
NC
NC
12
OUT B
NC 11
NC = NO CONNECT
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
OP490–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS (@ V = 61.5 V to 615 V, T = +258C, unless otherwise noted)
S
A
Parameter
Symbol
Conditions
INPUT OFFSET VOLTAGE
VOS
INPUT OFFSET CURRENT
IOS
INPUT BIAS CURRENT
IB
LARGE SIGNAL VOLTAGE
GAIN
AVO
VS = ± 15 V, VO = ± 10 V
RL = 100 kΩ
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V,
1 V < VO < 4 V
RL = 100 kΩ
RL = 10 kΩ
Min
OP490G
Typ Max Units
0.4
3
0.4
5
0.4
5
nA
4.2
15
4.2
20
4.2
25
nA
VO
VS = ± 15 V
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 10 kΩ
V+ = 5 V, V– = 0 V,
0 V < VCM < 4 V
VS = ± 15 V,
–15 V < VCM < 13.5 V
0.4
Max
VCM = 0 V
OUTPUT VOLTAGE SWING
CMR
OP490F
Typ
VCM = 0 V
V+ = 5 V, V– = 0 V
VS = ± 15 V1
COMMON-MODE
REJECTION
Min
0.5
IVR
VOL
OP490A/E
Typ
Max
0.2
INPUT VOLTAGE RANGE
VOH
Min
0.75
0.6
700
350
125
1200
600
250
500
250
100
1000
500
200
400
200
100
800
400
200
200
100
400
180
125
75
300
140
100
70
250
140
1.0
mV
V/mV
0/4
–15/13.5
0/4
–15/13.5
± 13.5 ± 14.2
± 10.5 ± 11.5
± 13.5
± 10.5
± 14.2
± 11.5
± 13.5
± 10.5
± 14.2
± 11.5
V
4.0
4.0
4.2
4.0
4.2
V
4.2
100
500
0/4
–15/13.5
100
500
V
100
90
110
80
100
80
100
100
130
90
120
90
120
500
µV
dB
POWER SUPPLY
REJECTION RATIO
PSRR
SLEW RATE
SR
VS = ± 15 V
SUPPLY CURRENT
(ALL AMPLIFIERS)
ISY
VS = ± 1.5 V, No Load
VS = ± 15 V, No Load
40
60
AV = +1
650
650
650
pF
CAPACITIVE LOAD STABILITY
1.0
5
5.6
12
3.2
5
60
80
10
12
40
60
3.2
5
60
80
10
12
40
60
µV/V
V/ms
60
80
µA
INPUT NOISE VOLTAGE
en p-p
fO = 0.1 Hz to 10 Hz
VS = ± 15 V
3
3
3
µV p-p
INPUT RESISTANCE
DIFFERENTIAL MODE
RIN
VS = ± 15 V
30
30
30
MΩ
INPUT RESISTANCE
COMMON MODE
RINCM
VS = ± 15 V
20
20
20
GΩ
GAIN BANDWIDTH PRODUCT
GBWP
AV = +1
20
20
20
kHz
CHANNEL SEPARATION
CS
fO = 10 Hz
VO = 20 V p-p
VS = ± 15 V2
150
dB
120
150
120
150
120
NOTES
1
Guaranteed by CMR test.
2
Guaranteed but not 100% tested.
Specifications subject to change without notice.
–2–
REV. B
OP490
ELECTRICAL CHARACTERISTICS
(@ VS = 61.5 V to 615 V, –558C ≤ TA ≤ +1258C, unless otherwise noted)
Parameter
Symbol
INPUT OFFSET VOLTAGE
VOS
AVERAGE INPUT OFFSET
VOLTAGE DRIFT
TCVOS
INPUT OFFSET CURRENT
IOS
INPUT BIAS CURRENT
LARGE-SIGNAL VOLTAGE GAIN
Conditions
Units
0.4
1.0
mV
VS = ± 15 V
2
5
µV/°C
VCM = 0 V
1.5
5
nA
IB
VCM = 0 V
4.4
20
nA
AVO
VS = ± 15 V, VO = ± 10 V
RL = 100 kΩ
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V,
1 V < VO < 4 V
RL = 100 kΩ
RL = 10 kΩ
IVR
V+ = 5 V, V– = 0 V
VS = ± 15 V1
OUTPUT VOLTAGE SWING
VO
VS = ± 15 V
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 10 kΩ
VOH
VOL
COMMON-MODE REJECTION
CMR
POWER SUPPLY REJECTION RATIO
PSRR
SUPPLY CURRENT (ALL AMPLIFIERS)
ISY
V+ = 5 V, V– = 0 V, 0 V < VCM < 3.5 V
VS = ± 15 V, –15 V < VCM < 13.5 V
VS = ± 1.5 V, No Load
VS = ± 15 V, No Load
NOTES
1
Guaranteed by CMR test.
Specifications subject to change without notice.
REV. B
OP490A
Typ
Max
INPUT VOLTAGE RANGE
–3–
Min
225
125
50
400
240
110
100
50
200
110
V/mV
0/3.5
–15/13.5
V
± 13
± 10
± 13.7
± 11
V
3.9
4.1
V
100
85
95
500
105
115
µV
dB
3.2
10
µV/V
70
90
100
120
µA
OP490–SPECIFICATIONS
(@ VS = 61.5 V to 615 V, –258C ≤ TA ≤ +858C for OP490E/F, –408C ≤ TA ≤ +858C for
ELECTRICAL CHARACTERISTICS OP490G, unless otherwise noted)
Parameter
Symbol
INPUT OFFSET VOLTAGE
VOS
AVERAGE INPUT OFFSET
VOLTAGE DRIVE
TCVOS
INPUT OFFSET CURRENT
Conditions
Min
OP490E
Typ
Max
Min
OP490F
Typ
Max
Min
OP490G
Typ Max
0.32
0.8
0.6
VS = ± 15 V
2
5
4
IOS
VCM = 0 V
0.8
3
1.0
5
1.3
7
nA
INPUT BIAS CURRENT
IB
VCM = 0 V
4.4
15
4.4
20
4.4
25
nA
LARGE SIGNAL VOLTAGE GAIN
AVO
VS = ± 15 V, VO = ± 10 V
RL = 100 kΩ
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V,
1 V < VO < 4 V
RL = 100 kΩ
RL = 10 kΩ
INPUT VOLTAGE RANGE
IVR
V+ = 5 V, V– = 0 V
VS = ± 15 V1
OUTPUT VOLTAGE SWING
VO
VS = ± 15 V
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 10 kΩ
VOH
VOL
COMMON-MODE
REJECTION
CMR
POWER SUPPLY
REJECTION RATIO
PSRR
SUPPLY CURRENT
(ALL AMPLIFIERS)
ISY
V+ = 5 V, V– = 0 V,
0 V < VCM < 3.5 V
VS = ± 15 V,
–15 V < VCM < 13.5 V
1.35
0.8
800
400
200
350
175
75
700
250
150
300
150
75
600
250
125
150
75
280
140
100
50
220
110
80
40
160
90
0/3.5
–15/13.5
0/3.5
–15/13.5
± 13
± 10
± 14
± 11
± 13
± 10
± 14
± 11
± 13
± 10
± 14
± 11
3.9
4.1
3.9
4.1
3.9
4.1
90
110
80
100
80
100
100
120
90
110
90
110
VS = ± 1.5 V, No Load
VS = ± 15 V, No Load
500
V/mV
0/3.5
–15/13.5
100
500
mV
µV/°C
4
500
250
100
100
1.5
Units
V
100
V
500
µV
dB
1.0
5.6
3.2
10
5.6
17.8
µV/V
65
80
100
120
65
80
100
120
60
75
100
120
µA
NOTES
1
Guaranteed by CMR test.
Specifications subject to change without notice.
SIMPLIFIED SCHEMATIC
–4–
REV. B
OP490
Wafer Test Limits (@ V = 61.5 V to 615 V, T = +258C, unless otherwise noted)
S
A
Parameter
Symbol
Input Offset Voltage
Input Offset Current
Input Bias Current
Large Signal Voltage Gain
VOS
IOS
IB
AVO
Input Voltage Range
VCM = 0 V
VCM = 0 V
VS = ± 15 V, VO = ± 10 V
RL = 100 kΩ
RL = 10 kΩ
V+ = 5 V, V– = 0 V
1 V < VO < 4 V, RL = 100 kΩ
V+ = 5 V, V– = 0 V
VS = ± 15 V1
VS = ± 15 V
RL = 10 kΩ
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 2 kΩ
V+ = 5 V, V– = 0 V
RL = 10 kΩ
V+ = 5 V, V– = 0 V, 0 V < VCM < 4 V
VS = ± 15 V, –15 V < VCM < 13.5 V
IVR
Output Voltage Swing
VO
VOH
VOL
Common-Mode Rejection
CMR
Power Supply Rejection Ratio
Supply Current (All Amplifiers)
PSRR
ISY
Conditions
VS = ± 15 V, No Load
Limits
Units
0.75
5
20
mV max
nA max
nA max
500
250
125
V/mV min
V/mV min
0/4
–15/13.5
V min
± 13.5
± 10.5
V min
4.0
V min
500
80
90
10
80
µV max
dB min
µV/V max
µA max
NOTES
1
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 qualifications through sample lot assembly and testing.
ABSOLUTE MAXIMUM RATINGS 1
ORDERING GUIDE1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V
Differential 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
TC, Y, P Package . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Operating Temperature Range
OP490A . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
OP490E, OP490F . . . . . . . . . . . . . . . . . . . –25°C to +85°C
OP490G . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Junction Temperature (TJ) . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering, 60 sec) . . . . . . +300°C
Package Type
uJA2
uJC
Units
14-Pin Hermetic DIP (Y)
14-Pin Plastic DIP (P)
28-Contact LCC (TC)
16-Pin SOL (S)
99
76
78
92
12
33
30
27
°C/W
°C/W
°C/W
°C/W
Model
TA = +258C
VOS max
(mV)
Operating
Temperature Package
Range
Description
OP490AY2
OP490ATC/883
OP490EY
OP490FY
OP490GP
OP490GS3
0.5
0.5
0.5
0.75
1.0
1.0
MIL
MIL
IND
IND
XIND
XIND
14-Pin Cerdip
28-Contact LCC
14-Pin Cerdip
14-Pin Cerdip
14-Pin Plastic DIP
16-Pin SOL
NOTES
1
Burn-in is available on commercial and industrial temperature range parts in
cerdip, plastic DIP and TO-can packages.
2
For devices processed in total compliance to MIL-STD-883, add /883 after
part number. Consult factory for 883 data sheet.
3
For availability and burn-in information on SO and PLCC packages, contact
your local sales office.
DICE CHARACTERISTICS
NOTES
1
Absolute maximum ratings apply to both DICE and packaged parts, unless
otherwise noted.
2
θJA is specified for worst case mounting conditions, i.e., θJA is specified for device
in socket for Cerdip, P-DIP, and LCC packages; θJA is specified for device soldered
to printed circuit board for SOL package.
Die Size 0.139 × 0.121 inch, 16,819 sq. mils
(3.53 × 3.07 mm, 10.84 sq. mm)
REV. B
–5–
OP490–Typical Performance Characteristics
Input Offset Voltage
vs. Temperature
Input Offset Current
vs. Temperature
Total Supply Current
vs. Temperature
Open-Loop Gain vs.
Single-Supply Voltage
Closed-Loop Gain
vs. Frequency
Output Voltage Swing
vs. Load Resistance
–6–
Input Bias Current
vs. Temperature
Open-Loop Gain and
Phase Shift vs. Frequency
Output Voltage Swing
vs. Load Resistance
REV. B
OP490
100
100
90
90
10
10
0%
0%
100µs
20mV
TA = 25°C
1ms
VS = ±15V
AV = +1
AV = +1
RL = 10kΩ
RL = 10kΩ
CL = 500pF
CL = 500pF
Small-Signal
Transient Response
Burn-In Circuit
REV. B
5V
TA = 25°C
VS = ±15V
Current Noise Density
vs. Frequency
Noise Voltage Density
vs. Frequency
Common-Mode Rejection
vs. Frequency
Power Supply Rejection
vs. Frequency
–7–
Large-Signal
Transient Response
OP490
Figure 1. Lithium-Sulphur Dioxide Cell Discharge Characteristic with OP490 and 100 kΩ Loads
requirement of the OP490, combined with the flat discharge
characteristic of the lithium cell, indicates that the OP490 can
be operated over the entire useful life of the cell. Figure 1 shows
the typical discharge characteristic of a 1 Ah lithium cell powering an OP490 with each amplifier, in turn, driving full output
swing into a 100 kΩ load.
SINGLE-SUPPLY OUTPUT VOLTAGE RANGE
Channel Separation Test Circuit
APPLICATIONS INFORMATION
BATTERY-POWERED APPLICATIONS
The OP490 can be operated on a minimum supply voltage of
+1.6 V, or with dual supplies of ± 0.8 V, and draws only 60 µA
of supply current. In many battery-powered circuits, the OP490
can be continuously operated for hundreds of hours before requiring battery replacement, reducing equipment downtime and
operating costs.
High performance portable equipment and instruments frequently use lithium cells because of their long shelf-life, light
weight, and high energy density relative to older primary cells.
Most lithium cells have a nominal output voltage of 3 V and are
noted for a flat discharge characteristic. The low supply current
In single-supply operation the OP490’s input and output ranges
include ground. This allows true “zero-in, zero-out” operation.
The output stage provides an active pull-down to around 0.8 V
above ground. Below this level, a load resistance of up to 1 MΩ
to ground is required to pull the output down to zero.
In the region from ground to 0.8 V the OP490 has voltage gain
equal to the data sheet specification. Output current source capability is maintained over the entire voltage range including
ground.
INPUT VOLTAGE PROTECTION
The OP490 uses a PNP input stage with protection resistors in
series with the inverting and noninverting inputs. The high
breakdown of the PNP transistors coupled with the protection
resistors provides a large amount of input protection, allowing
the inputs to be taken 20 V beyond either supply without damaging the amplifier.
–8–
REV. B
OP490
R6, and R7, and associated CMOS switches. The resulting output of A is a triangle wave with upper and lower levels of 3.33
and 1.67 volts. The output of B is a square wave with almost
rail-to-rail swing. With the components shown, frequency of operation is given by the equation:
MICROPOWER VOLTAGE-CONTROLLED OSCILLATOR
An OP490 in combination with an inexpensive quad CMOS
switch comprise the precision VCO of Figure 2. This circuit provides triangle and square wave outputs and draws only 75 µA
from a 5 V supply. A acts as an integrator; S1 switches the
charging current symmetrically to yield positive and negative
ramps. The integrator is bounded by B which acts as a Schmitt
trigger with a precise hysteresis of 1.67 volts, set by resistors R5,
f OUT =V CONTROL (Volts) ×10 Hz/V
but this is easily changed by varying C1. The circuit operates
well up to a few hundred hertz.
Figure 2. Micropower Voltage Controlled Oscillator
REV. B
–9–
OP490
MICROPOWER SINGLE-SUPPLY
QUAD VOLTAGE-OUTPUT 8-BIT DAC
The circuit of Figure 3 uses the DAC8408 CMOS quad 8-bit
DAC, and the OP490 to form a single-supply quad voltage-output DAC with a supply drain of only 140 µA. The DAC8408 is
used in voltage switching mode and each DAC has an output resistance (≈10 kΩ) independent of the digital input code. The
output amplifiers act as buffers to avoid loading the DACs. The
100 kΩ resistors ensure that the OP490 outputs will swing below 0.8 V when required.
Figure 3. Micropower Single-Supply Quad Voltage Output 8-Bit DAC
–10–
REV. B
OP490
Figure 4. High Output Amplifier
HIGH OUTPUT AMPLIFIER
The amplifier shown in Figure 4 is capable of driving 25 V p-p
into a 1 kΩ load. Design of the amplifier is based on a bridge
configuration. A amplifies the input signal and drives the load
with the help of B. Amplifier C is a unity-gain inverter which
drives the load with help from D. Gain of the high output amplifier with the component values shown is 10, but can easily be
changed by varying R1 or R2.
SINGLE-SUPPLY MICROPOWER QUAD
PROGRAMMABLE GAIN AMPLIFIER
The combination of quad OP490 and the DAC8408 quad 8-bit
CMOS DAC, creates a quad programmable-gain amplifier with
a quiescent supply drain of only 140 µA. The digital code
REV. B
present at the DAC, which is easily set by a microprocessor, determines the ratio between the fixed DAC feedback resistor and
the resistance of the DAC ladder presents to the op amp feedback loop. Gain of each amplifier is:
VOUT
256
=–
V IN
n
where n equals the decimal equivalent of the 8-bit digital code
present at the DAC. If the digital code present at the DAC consists of all zeros, the feedback loop will be open causing the op
amp output to saturate. The 10 MΩ resistors placed in parallel
with the DAC feedback loop eliminates this problem with a very
small reduction in gain accuracy. The 2.5 V reference biases the
amplifiers to the center of the linear region providing maximum
output swing.
–11–
PRINTED IN U.S.A.
OP490
Figure 5. Single Supply Micropower Quad Programmable Gain Amplifier
–12–
REV. B