Analog Devices AD712JN, AD712CN, AD712BQ, AD712AQ, AD712TQ-883B Datasheet

Dual-Precision, Low-Cost,

a

FEATURES
Enhanced Replacement for LF412 and TL082

AC PERFORMANCE
Settles to 0.01% in 1.0 s
16 V/s Min Slew Rate (AD712J)
3 MHz Min Unity Gain Bandwidth (AD712J)

DC PERFORMANCE

0.30 mV Max Offset Voltage: (AD712C)
5 V/C Max Drift: (AD712C)
200 V/mV Min Open-Loop Gain (AD712K)
4 V p-p Max Noise, 0.1 Hz to 10 Hz (AD712C)
Surface Mount Available in Tape and Reel in

Accordance with EIA-481A Standard
MIL-STD-883B Parts Available
Single Version Available: AD711
Quad Version: AD713
Available in Plastic Mini-DIP, Plastic SOIC, and

Hermetic CERDIP

PRODUCT DESCRIPTION

The AD712 is a high-speed, precision monolithic operational
amplifier offering high performance at very modest prices. Its
very low offset voltage and offset voltage drift are the results of
advanced laser wafer trimming technology. These performance
benefits allow the user to easily upgrade existing designs that use
older precision BiFETs and, in many cases, bipolar op amps.

The superior ac and dc performance of this op amp makes it
suitable for active filter applications. With a slew rate of 16 V/ms
and a settling time of 1 ms to ± 0.01%, the AD712 is ideal as a
buffer for 12-bit D/A and A/D converters and as a high-speed
integrator. The settling time is unmatched by any similar IC
amplifier.

The combination of excellent noise performance and low input
current also make the AD712 useful for photo diode preamps.
Common-mode rejection of 88 dB and open loop gain of
400 V/mV ensure 12-bit performance even in high-speed unity
gain buffer circuits.

The AD712 is pinned out in a standard op amp configuration
and is available in seven performance grades. The AD712J and
AD712K are rated over the commercial temperature range of
0∞C to 70∞C. The AD712A, AD712B, and AD712C are rated
over the industrial temperature range of –40∞C to +85∞C. The
AD712S and AD712T are rated over the military temperature
range of –55∞C to +125∞C and are available processed to MIL­STD-883-B, Rev. C.

Extended reliability PLUS screening is available, specified over
the commercial and industrial temperature ranges. PLUS

High-Speed, BiFET Op Amp

AD712

CONNECTION DIAGRAMS

Plastic Mini-DIP (N) Package

SOIC (R) Package and CERDIP (Q) Package

AMPLIFIER NO. 2AMPLIFIER NO. 1

OUTPUT

INVERTING

OUTPUT

NONINVERTING

OUTPUT

1

2

3

V–

4

AD712

screening includes 168-hour burn-in, as well as other environ­mental and physical tests.

The AD712 is available in an 8-lead plastic mini-DIP, SOIC,
and CERDIP.

PRODUCT HIGHLIGHTS

1. The AD712 offers excellent overall performance at very
competitive prices.

2. Analog Devices’ advanced processing technology and 100%
testing guarantee a low input offset voltage (0.3 mV max,
C grade, 3 mV max, J grade). Input offset voltage is specified
in the warmed-up condition. Analog Devices’ laser wafer drift
trimming process reduces input offset voltage drifts to 5 mV/∞C
max on the AD712C.

3. Along with precision dc performance, the AD712 offers
excellent dynamic response. It settles to ±0.01% in 1 ms and
has a minimum slew rate of 16 V/ms. Thus this device is ideal
for applications such as DAC and ADC buffers which require a
combination of superior ac and dc performance.

4. The AD712 has a guaranteed and tested maximum voltage
noise of 4 mV p-p, 0.1 Hz to 10 Hz (AD712C).

5. Analog Devices’ well-matched, ion-implanted JFETs ensure
a guaranteed input bias current (at either input) of 50 pA
max (AD712C) and an input offset current of 10 pA max
(AD712C). Both input bias current and input offset current
are guaranteed in the warmed-up condition.

8

V+

OUTPUT

7

INVERTING

6

INPUT
NONINVERTING

5

INPUT

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. 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] www.analog.com
Fax: [phone] © Analog Devices, Inc., 2002

AD712–SPECIFICATIONS

(VS = 15 V @ TA = 25C unless otherwise noted.)

Parameter Min Typ Max Min Typ Max Min Typ Max Unit

AD712J/A/S AD712K/B/T AD712C

INPUT OFFSET VOLTAGE

1

Initial Offset 0.3 3/1/1 0.2 1.0/0.7/0.7 0.1 0.3 mV

to T

T

MIN

MAX

4/2/2 2.0/1.5/1.5 0.6 mV

vs. Temp 7 20/20/20 7 10 3 5 mV/∞C
vs. Supply 76 95 80 100 86 110 dB

to T

T

MIN

MAX

76/76/76 80 86 dB

Long-Term Offset Stability 15 15 15 mV/Month

INPUT BIAS CURRENT

2

VCM = 0 V 25 75 20 75 20 50 pA

= 0 V @ T

V

CM

MAX

0.6/1.6/26 1.7/4.8/77 0.5/1.3/20 1.7/4.8/77 1.3 3.2 nA

VCM = ±10 V 100 100 75 pA

INPUT OFFSET CURRENT

V

= 0 V 10 25 5 25 5 10 pA

CM

VCM = 0 V @ T

MAX

0.3/0.7/11 0.6/1.6/26 0.1/0.3/5 0.6/1.6/26 0.3 0.7 nA

MATCHING CHARACTERISTICS

Input Offset Voltage 3/1/1 1.0/0.7/0.7 0.3 mV

to T

T

MIN

MAX

4/2/2 2.0/1.5/1.5 0.6 mV

Input Offset Voltage Drift 20/20/20 10 5 mV/∞C
Input Bias Current 25 25 10 pA
Crosstalk @ f = 1 kHz 120 120 120 dB
@ f = 100 kHz 90 90 90 dB

FREQUENCY RESPONSE

Small Signal Bandwidth 3.0 4.0 3.4 4.0 3.4 4.0 MHz
Full Power Response 200 200 200 kHz
Slew Rate 16 20 18 20 18 20 V/ms
Settling Time to 0.01% 1.0 1.2 1.0 1.2 1.0 1.2 ms
Total Harmonic Distortion 0.0003 0.0003 0.0003 %

INPUT IMPEDANCE

Differential 3 ¥ 10

12

5.5 3 ¥ 10125.5 3 ¥ 10125.5 WpF

Common Mode 3 ¥ 10125.5 3 ¥ 10125.5 3 ¥ 10125.5 WpF

INPUT VOLTAGE RANGE

Differential
Common-Mode Voltage

3

to T

T

MIN

MAX

4

–VS + 4 +VS – 2 –VS + 4 +VS – 2 –VS + 4 +VS – 2 V

±20 ± 20 ± 20 V
+14.5, –11.5 +14.5, –11.5 +14.5, –11.5

Common-Mode
Rejection Ratio

= ±10 V 76 88 80 88 86 94 dB

V

CM

to T

T

MIN

MAX

= ±11 V 70 84 76 84 76 90 dB

V

CM

T

to T

MIN

MAX

76/76/76 84 80 84 86 90 dB

70/70/70 80 74 80 74 84 dB

INPUT VOLTAGE NOISE 2 2 2 mV p-p

45 45 45 nV/÷
22 22 22 nV/÷
18 18 18 nV/÷

Hz
Hz
Hz

16 16 16 nV/÷Hz

INPUT CURRENT NOISE 0.01 0.01 0.01 pA/÷Hz

OPEN-LOOP GAIN 150 400 200 400 200 400 V/mV

100/100/100 100 100 V/mV

OUTPUT CHARACTERISTICS

Voltage +13, –12.5 +13.9, –13.3 +13, –12.5 +13.9, –13.3 +13, –12.5 +13.9, –13.3 V

±12/± 12/12 +13.8, –13.1 12 +13.8, –13.1 12 +13.8, –13.1 V

Current 25 25 25 mA

POWER SUPPLY

Rated Performance ±15 ± 15 ± 15 V
Operating Range 4.5 18 4.5 18 4.5 18 V
Quiescent Current 5.0 6.8 5.0 6.0 5.0 5.6 mA

NOTES

1

Input Offset Voltage specifications are guaranteed after 5 minutes of operation at TA = 25∞C.

2

Bias Current specifications are guaranteed maximum at either input after 5 minutes of operation at TA = 25∞C. For higher temperatures, the current doubles every 10∞C.

3

Defined as voltage between inputs, such that neither exceeds ± 10 V from ground.

4

Typically exceeding –14.1 V negative common-mode voltage on either input results in an output phase reversal.

Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max
specifications are guaranteed, although only those shown in boldface are tested on all production units.

Specifications subject to change without notice.

–2–

REV. E

AD712

WARNING!

ESD SENSITIVE DEVICE

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V

Internal Power Dissipation

2

Input Voltage3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V

Output Short Circuit Duration . . . . . . . . . . . . . . . . . Indefinite

Differential Input Voltage . . . . . . . . . . . . . . . . . . +V

Storage Temperature Range (Q) . . . . . . . . . . –65∞C to +150∞C

Storage Temperature Range (N, R) . . . . . . . .–65∞C to +125∞C

Operating Temperature Range

AD712J/K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0∞C to 70∞C

AD712A/B/C . . . . . . . . . . . . . . . . . . . . . . . . –40∞C to +85∞C

AD712S/T . . . . . . . . . . . . . . . . . . . . . . . . . –55∞C to +125∞C

Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300∞C

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent 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.

2

Thermal Characteristics:

8-Lead Plastic Package: qJA = 165∞C/W
8-Lead Cerdip Package: qJC = 22∞C/W; qJA = 110∞C/W
8-Lead SOIC Package: qJA = 100∞C

3

For supply voltages less than ± 18 V, the absolute maximum input voltage is equal

to the supply voltage.

1

Model Range Description Option

AD712AQ –40∞ C to +85∞C 8-Lead Ceramic DIP Q-8

and –V

S

AD712BQ* –40∞C to +85∞C 8-Lead Ceramic DIP Q-8

S

AD712CN* –40∞C to +85∞C 8-Lead Plastic DIP N-8
AD712JN 0∞C to 70∞C 8-Lead Plastic DIP N-8
AD712JR 0∞C to 70∞C 8-Lead Plastic SOIC R-8
AD712JR-REEL 0∞C to 70∞ C 8-Lead Plastic SOIC R-8
AD712JR-REEL7 0∞C to 70∞C 8-Lead Plastic SOIC R-8
AD712KN 0∞C to 70∞C 8-Lead Plastic DIP N-8
AD712KR 0∞C to 70∞C 8-Lead Plastic SOIC R-8
AD712KR-REEL 0∞C to 70∞C 8-Lead Plastic SOIC R-8
AD712KR-REEL7 0∞C to 70∞C 8-Lead Plastic SOIC R-8
AD712SQ* –55∞C to +125∞C 8-Lead Ceramic DIP Q-8
AD712SQ/883B –55∞C to +125∞C 8-Lead Ceramic DIP Q-8
AD712TQ* –55∞C to +125∞C 8-Lead Ceramic DIP Q-8
AD712TQ/883B* –55∞C to +125∞C 8-Lead Ceramic DIP Q-8

*

Not for new design, obsolete April 2002.

ORDERING GUIDE

Temperature Package Package

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 AD712 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. E

–3–

AD712

–Typical Performance Characteristics

20

15

10

R

= 2k

L

25C

5

INPUT VOLTAGE SWING – V

0

0

520

SUPPLY VOLTAGE  V

10 15

TPC 1. Input Voltage Swing vs.
Supply Voltage

6

5

4

3

QUIESCENT CURRENT – mA

2

0

520

SUPPLY VOLTAGE  V

10 15

TPC 4. Quiescent Current vs.
Supply Voltage

20

15

10

5

OUTPUT VOLTAGE SWING – V

0

0

520

SUPPLY VOLTAGE  V

+V

OUT

–V

OUT

R

= 2k

L

25C

10 15

TPC 2. Output Voltage Swing vs.
Supply Voltage

6

10

7

10

= 0) – Amps

8

10

CM

9

10

10

10

11

10

INPUT BIAS CURRENT (V

12

10

–60

0

TEMPERATURE – C

TPC 5. Input Bias Current vs.
Temperature

30

25

20

15V SUPPLIES

15

10

5

OUTPUT VOLTAGE SWING – V p–p

0

10 100 10k1k

LOAD RESISTANCE – 

TPC 3. Output Voltage Swing vs.
Load Resistance

100

10

1.0

0.1

OUTPUT IMPEDANCE – 

140–40 –40 20 12040 60 80 100

0.01
1k

10k 100k 1M 10M

FREQUENCY – Hz

TPC 6. Output Impedance vs.
Frequency

100

75

50

25

INPUT BIAS CURRENT – pA

0

–10

MAX J GRADE LIMIT

V

= 15V

S

25C

–5 1005

COMMON MODE VOLTAGE – V

TPC 7. Input Bias Current vs.
Common Mode Voltage

26

24

22

20

18

– OUTPUT CURRENT

16

14

12

SHORT CIRCUIT CURRENT LIMIT – mA

10

–40 –20 0 20 40 60 80 100 120 140

–60

AMBIENT TEMPERATURE – C

+ OUTPUT CURRENT

TPC 8. Short Circuit Current Limit
vs. Temperature

–4–

5.0

4.5

4.0

3.5

UNITY GAIN BANDWIDTH – MHz

3.0
–60 –40 –20 0 20 40 60 80 100 120 140

TEMPERATURE – C

TPC 9. Unity Gain Bandwidth vs.
Temperature

REV. E

AD712

(

)

100

80

60

40

20

OPEN LOOP GAIN – dB

0

–20

GAIN
PHASE
2k
100pF
LOAD

100 1k 1M10 10k 100k 10M

FREQUENCY – Hz

TPC 10. Open-Loop Gain and
Phase Margin vs. Frequency

100

80

VS = 15V

= 1Vp-p

V

60

CMR – dB

40

20

0

10

100 1k 10k 100k 1M

FREQUENCY – Hz

CM

25C

TPC 13. Common Mode
Rejection vs. Frequency

100

80

60

40

20

0

–20

125

120

115

110

105

PHASE MARGIN – C

OPEN LOOP GAIN – dB

100

95

0

R

= 2k

L

25C

520
SUPPLY VOLTAGE  V

10 15

TPC 11. Open-Loop Gain vs. Sup­ply Voltage

30

25

20

15

10

5

OUTPUT VOLTAGE – Volts p–p

0

100k 10M1M

INPUT FREQUENCY – Hz

RL = 2k
25C

V

= 15V

S

TPC 14. Large Signal Frequency
Response

110

100

80

60

40

VS = 15V SUPPLIES
WITH 1V p-p SINE

20

WAVE 25C

POWER SUPPLY REJECTION – dB

0

10

100 1k 10k 100k 1M

SUPPLY MODULATION FREQUENCY – Hz

+ SUPPLY

– SUPPLY

TPC 12. Power Supply Rejection
vs. Frequency

10

8

6

4

2

0

–2

–4

–6

–8

OUTPUT SWING FROM 0V TO VOLTS

–10

0.5

0.1%1%

0.1%1%ERROR

0.7

0.6
SETTLING TIME – s

0.01%

0.01%

0.8 0.9 1.0

TPC 15. Output Swing and Error
vs. Settling Time

–70

–80

–90

–100

THD – dB

–110

–120

–130

100 10k1k

3V RMS
R

L

C

L

FREQUENCY – Hz

TPC 16. Total Harmonic
Distortion vs. Frequency

REV. E

= 2k
= 100pF

100k

1k

Hz

100

10

INPUT NOISE VOLTAGE – nV/

1

FREQUENCY – Hz

1k

TPC 17. Input Noise Voltage
Spectral Density

–5–

25

20

15

10

SLEW RATE – V/s

5

10k 100k100101

0

100

200 300 400 500 600 700 800 9000
INPUT ERROR SIGNAL – mV

AT SUMMING JUNCTION

TPC 18. Slew Rate vs. Input
Error Signal