Datasheet OP490 Datasheet (Analog Devices)

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8

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12 13 141516

17 18

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24

25

262728

NC

+IN A

NC

V+

NC

+IN B

NC

NC
+IN D

NC
V–
NC
+IN C
NC

NC

–IN A

OUT ANCOUT D

–IN D

NC

NC

–IN B

OUT B

OUT C

–IN C

NC

NC

NC = NO CONNECT

Low Voltage Micropower

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

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. 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.

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 tem-
perature range. Gain exceeds over 700,000 and CMR is better
than 100 dB. A PSRR of under 5.6 µV/V minimizes offset volt-
age 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 makes it ideal for battery
and solar powered applications, such as portable instruments
and remote sensors.

Quad Operational Amplifier

OP490

PIN CONNECTION

14-Pin Hermetic DIP (Y-Suffix)

14-Pin Plastic DIP (P-Suffix)

OUT A

1

–IN A

2

+IN A

3

V+

4

+IN B

5

–IN B

6

OUT B

7

16-Pin SOL (S-Suffix)

OUT A

1

–IN A

2
3

+IN A

V+

4

+IN B

5

–IN B

6

OUT B

7
8

NC

NC = NO CONNECT

28-Pin LCC (TC-Suffix)

OUT D

14
13

–IN D

12

+IN D

11

V–

10

+IN C

9

–IN C

8

OUT C

OUT D

16
15

–IN D

14

+IN D

13

V–

12

+IN C

11

–IN C
OUT C

10

NC

9

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: [phone] Fax: [phone]

OP490–SPECIFICA TIONS

ELECTRICAL CHARACTERISTICS

(@ VS = 61.5 V to 615 V, TA = +258C, unless otherwise noted)

OP490A/E OP490F OP490G

Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units

INPUT OFFSET VOLTAGE V
INPUT OFFSET CURRENT I
INPUT BIAS CURRENT I
LARGE SIGNAL VOLTAGE A

OS

OS

B

VO

VCM = 0 V 0.4 3 0.4 5 0.4 5 nA
VCM = 0 V 4.2 15 4.2 20 4.2 25 nA
VS = ±15 V, VO = ±10 V

0.2 0.5 0.4 0.75 0.6 1.0 mV

GAIN RL = 100 kΩ 700 1200 500 1000 400 800 V/mV

RL = 10 kΩ 350 600 250 500 200 400

RL = 2 kΩ 125 250 100 200 100 200
V+ = 5 V, V– = 0 V,
1 V < VO < 4 V

RL = 100 kΩ 200 400 125 300 100 250

RL = 10 kΩ 100 180 75 140 70 140

INPUT VOLTAGE RANGE IVR V+ = 5 V, V– = 0 V 0/4 0/4 0/4 V

VS = ±15 V

OUTPUT VOLTAGE SWING V

O

VS = ±15 V

1

–15/13.5 –15/13.5 –15/13.5

RL = 10 kΩ±13.5 ±14.2 ±13.5 ±14.2 ±13.5 ± 14.2 V

RL = 2 kΩ±10.5 ±11.5 ±10.5 ±11.5 ±10.5 ± 11.5

V

OH

V+ = 5 V, V– = 0 V

RL = 2 kΩ 4.0 4.2 4.0 4.2 4.0 4.2 V

V

OL

V+ = 5 V, V– = 0 V

RL = 10 kΩ 100 500 100 500 100 500 µV

COMMON-MODE CMR V+ = 5 V, V– = 0 V, 90 110 80 100 80 100 dB

REJECTION 0 V < VCM < 4 V

VS = ±15 V, 100 130 90 120 90 120
–15 V < VCM < 13.5 V

POWER SUPPLY

REJECTION RATIO PSRR 1.0 5.6 3.2 10 3.2 10 µV/V
SLEW RATE SR VS = ±15 V 5 12 5 12 5 12 V/ms
SUPPLY CURRENT VS = ±1.5 V, No Load 40 60 40 60 40 60 µA

(ALL AMPLIFIERS) I

SY

VS = ±15 V, No Load 60 80 60 80 60 80
CAPACITIVE LOAD STABILITY AV = [phone] pF
INPUT NOISE VOLTAGE en p-p fO = 0.1 Hz to 10 Hz 3 3 3 µV p-p

VS = ±15 V
INPUT RESISTANCE

DIFFERENTIAL MODE R

IN

VS = ±15 V 30 30 30 MΩ
INPUT RESISTANCE

COMMON MODE R

INCM

VS = ±15 V 20 20 20 GΩ
GAIN BANDWIDTH PRODUCT GBWP AV = +1 20 20 20 kHz
CHANNEL SEPARATION CS fO = 10 Hz 120 150 120 150 120 150 dB

NOTES

1

Guaranteed by CMR test.

2

Guaranteed but not 100% tested.

Specifications subject to change without notice.

VO = 20 V p-p

VS = ±15 V

2

–2–

REV. B

OP490

ELECTRICAL CHARACTERISTICS

(@ VS = 61.5 V to 615 V, –558C ≤ TA ≤ +1258C, unless otherwise noted)

OP490A

Parameter Symbol Conditions Min Typ Max Units

INPUT OFFSET VOLTAGE V

OS

0.4 1.0 mV

AVERAGE INPUT OFFSET

VOLTAGE DRIFT TCV
INPUT OFFSET CURRENT I
INPUT BIAS CURRENT I
LARGE-SIGNAL VOLTAGE GAIN A

OS

OS

B

VO

VS = ±15 V 2 5 µV/°C
VCM = 0 V 1.5 5 nA
VCM = 0 V 4.4 20 nA
VS = ±15 V, VO = ±10 V

RL = 100 kΩ 225 400 V/mV
RL = 10 kΩ 125 240

RL = 2 kΩ 50 110
V+ = 5 V, V– = 0 V,
1 V < VO < 4 V

RL = 100 kΩ 100 200

RL = 10 kΩ 50 110

INPUT VOLTAGE RANGE IVR V+ = 5 V, V– = 0 V 0/3.5 V

VS = ±15 V

OUTPUT VOLTAGE SWING V

O

VS = ±15 V

1

–15/13.5

RL = 10 kΩ±13 ±13.7 V
RL = 2 kΩ±10 ±11

V

OH

V+ = 5 V, V– = 0 V
RL = 2 kΩ 3.9 4.1 V

V

OL

V+ = 5 V, V– = 0 V
RL = 10 kΩ 100 500 µV

COMMON-MODE REJECTION CMR V+ = 5 V, V– = 0 V, 0 V < VCM < 3.5 V 85 105 dB

VS = ±15 V, –15 V < VCM < 13.5 V 95 115

POWER SUPPLY REJECTION RATIO PSRR 3.2 10 µV/V
SUPPLY CURRENT (ALL AMPLIFIERS) I

SY

VS = ±1.5 V, No Load 70 100 µA
VS = ±15 V, No Load 90 120

NOTES

1

Guaranteed by CMR test.

Specifications subject to change without notice.

REV. B

–3–

OP490–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

Parameter Symbol Conditions Min Typ Max Min Typ Max Min Typ Max Units

(@ VS = 61.5 V to 615 V, –258C ≤ TA ≤ +858C for OP490E/F, –408C ≤ TA ≤ +858C for
OP490G, unless otherwise noted)

OP490E OP490F OP490G

INPUT OFFSET VOLTAGE V

AVERAGE INPUT OFFSET

VOLTAGE DRIVE TCV

INPUT OFFSET CURRENT I
INPUT BIAS CURRENT I
LARGE SIGNAL VOLTAGE GAIN A

INPUT VOLTAGE RANGE IVR V+ = 5 V, V– = 0 V 0/3.5 0/3.5 0/3.5 V

OUTPUT VOLTAGE SWING V

COMMON-MODE CMR V+ = 5 V, V– = 0 V, 90 110 80 100 80 100 dB

REJECTION 0 V < VCM < 3.5 V

OS

VS = ±15 V 2 5 4 4 µV/°C

OS

OS

B

VO

O

V

OH

V

OL

VCM = 0 V 0.8 3 1.0 5 1.3 7 nA
VCM = 0 V 4.4 15 4.4 20 4.4 25 nA
VS = ±15 V, VO = ±10 V

RL = 100 kΩ 500 800 350 700 300 600 V/mV
RL = 10 kΩ 250 400 175 250 150 250

RL = 2 kΩ 100 200 75 150 75 125
V+ = 5 V, V– = 0 V,
1 V < VO < 4 V
RL = 100 kΩ 150 280 100 220 80 160
RL = 10 kΩ 75 140 50 110 40 90

VS = ±15 V
VS = ±15 V

RL = 10 kΩ±13 ±14 ±13 ±14 ±13 ±14 V

RL = 2 kΩ±10 ±11 ±10 ±11 ±10 ±11
V+ = 5 V, V– = 0 V

RL = 2 kΩ 3.9 4.1 3.9 4.1 3.9 4.1
V+ = 5 V, V– = 0 V

RL = 10 kΩ 100 500 100 500 100 500 µV

VS = ±15 V, 100 120 90 110 90 110
–15 V < VCM < 13.5 V

1

0.32 0.8 0.6 1.35 0.8 1.5 mV

–15/13.5 –15/13.5 –15/13.5

POWER SUPPLY

REJECTION RATIO PSRR 1.0 5.6 3.2 10 5.6 17.8 µV/V

SUPPLY CURRENT VS = ±1.5 V, No Load 65 100 65 100 60 100 µA

(ALL AMPLIFIERS) I

NOTES

1

Guaranteed by CMR test.

Specifications subject to change without notice.

SY

VS = ±15 V, No Load 80 120 80 120 75 120

SIMPLIFIED SCHEMATIC

–4–

REV. B

OP490

Wafer Test Limits

(@ VS = 61.5 V to 615 V, TA = +258C, unless otherwise noted)

Parameter Symbol Conditions Limits Units

Input Offset Voltage V
Input Offset Current I
Input Bias Current I
Large Signal Voltage Gain A

OS
B

OS

VO

VCM = 0 V 5 nA max
VCM = 0 V 20 nA max
VS = ±15 V, VO = ±10 V

R

= 100 kΩ 500 V/mV min

L

R

= 10 kΩ 250

L

0.75 mV max

V+ = 5 V, V– = 0 V 125 V/mV min
1 V < V

Input Voltage Range IVR V+ = 5 V, V– = 0 V 0/4 V min

V

Output Voltage Swing V

V

O

V

OH

V

OL

V+ = 5 V, V– = 0 V
V+ = 5 V, V– = 0 V

Common-Mode Rejection CMR V+ = 5 V, V– = 0 V, 0 V < V

V

< 4 V, RL = 100 kΩ

O

= ±15 V

S

= ±15 V

S

1

–15/13.5

RL = 10 kΩ±13.5 V min
R

= 2 kΩ±10.5

L

R

= 2 kΩ 4.0 V min

L

R

= 10 kΩ 500 µV max

L

= ±15 V, –15 V < VCM < 13.5 V 90

S

< 4 V 80 dB min

CM

Power Supply Rejection Ratio PSRR 10 µV/V max
Supply Current (All Amplifiers) I

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

SY

1

VS = ±15 V, No Load 80 µA max

ORDERING GUIDE

1

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 (T

) . . . . . . . . . . . . . –65°C to +150°C

J

Lead Temperature Range (Soldering, 60 sec) . . . . . . +300°C

Package Type

2

u

JA

u

JC

Units

14-Pin Hermetic DIP (Y) 99 12 °C/W
14-Pin Plastic DIP (P) 76 33 °C/W

Model (mV) Range Description

OP490AY

2

OP490ATC/883 0.5 MIL 28-Contact LCC
OP490EY 0.5 IND 14-Pin Cerdip
OP490FY 0.75 IND 14-Pin Cerdip
OP490GP 1.0 XIND 14-Pin Plastic DIP

OP490GS

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.

3

TA = +258C Operating

max Temperature Package

V

OS

0.5 MIL 14-Pin Cerdip

1.0 XIND 16-Pin SOL

28-Contact LCC (TC) 78 30 °C/W
16-Pin SOL (S) 92 27 °C/W

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.

DICE CHARACTERISTICS

REV. B

–5–

Die Size 0.139 × 0.121 inch, 16,819 sq. mils
(3.53

×

3.07 mm, 10.84 sq. mm)

OP490–T ypical Performance Characteristics

Input Offset Voltage
vs. Temperature

Total Supply Current
vs. Temperature

Input Offset Current
vs. Temperature

Open-Loop Gain vs.
Single-Supply Voltage

Input Bias Current
vs. Temperature

Open-Loop Gain and
Phase Shift vs. Frequency

Closed-Loop Gain
vs. Frequency

Output Voltage Swing
vs. Load Resistance

–6–

Output Voltage Swing
vs. Load Resistance

REV. B

OP490

Power Supply Rejection
vs. Frequency

Current Noise Density
vs. Frequency

Common-Mode Rejection
vs. Frequency

100

90

10

0%

100µs

TA = 25°C
V

= ±15V

S

A

= +1

V

= 10kΩ

R

L

= 500pF

C

L

20mV

Small-Signal
Transient Response

Noise Voltage Density
vs. Frequency

100

90

10

0%

5V

TA = 25°C
V

= ±15V

S

A

= +1

V

= 10kΩ

R

L

= 500pF

C

L

Large-Signal
Transient Response

1ms

REV. B

Burn-In Circuit

–7–

OP490

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

Figure 1. Lithium-Sulphur Dioxide Cell Discharge Charac-

Ω

teristic with OP490 and 100 k

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

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.

Loads

–8–

REV. B

OP490

MICROPOWER VOLTAGE-CONTROLLED OSCILLATOR

An OP490 in combination with an inexpensive quad CMOS
switch comprise the precision V
vides 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,

of Figure 2. This circuit pro-

CO

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:

f

OUT=VCONTROL

but this is easily changed by varying C1. The circuit operates
well up to a few hundred hertz.

(Volts)×10 Hz/V

REV. B

Figure 2. Micropower Voltage Controlled Oscillator

–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

Figure 4. High Output Amplifier

OP490

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

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:

V

OUT

V

IN

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.

= –

256

n

REV. B

–11–

OP490

Figure 5. Single Supply Micropower Quad Programmable Gain Amplifier

–12–

PRINTED IN U.S.A.

REV. B