ad712.pdf

Dual Precision, Low Cost,

High Speed, BiFET Op Amp

AD712

FEATURES

Enhanced Replacements for LF412 and TL082

CONNECTION DIAGRAMS

TO-99

Plastic Mini-Dip (N) Package

AC PERFORMANCE

Settles to 6 0.01% in 1.0 ms

16 V/ m s min Slew Rate (AD712J)

3 MHz min Unity Gain Bandwidth (AD712J)

(H) Package

SOIC (R) Package

and

Cerdip (Q) Package

DC PERFORMANCE

0.30 mV max Offset Voltage: (AD712C)

5 m V/ 8 C max Drift: (AD712C)

200 V/mV min Open-Loop Gain (AD712K)

4 m V p-p max Noise, 0.1 Hz to 10 Hz (AD712C)

Surface Mount Available in Tape and Reel in Accor-

dance with EIA-481A Standard

MIL-STD-883B Parts Available

Single Version Available: AD711

Quad Version: AD713

Available in Plastic Mini-DIP, Plastic SOIC, Hermetic

Cerdip, Hermetic Metal Can Packages and Chip Form

Extended reliability PLUS screening is available, specified over

the commercial and industrial temperature ranges. PLUS

screening includes 168-hour burn-in, as well as other environ-

mental and physical tests.

The AD712 is available in an 8-pin plastic mini-DIP, SOIC,

cerdip, TO-99 metal can, or in chip form.

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 MIL-

STD-883B, Rev. C.

PRODUCT HIGHLIGHTS

1. The AD712 offers excellent overall performance at very

competitive prices.

2. Analog Devices’ advanced processing technology and with

100% testing guarantees 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 ex-

cellent dynamic response. It settles to ± 0.01% in 1 ms and

has a 100% tested minimum slew rate of 16 V/ms. Thus this

device is ideal for applications such as DAC and ADC buff-

ers which require a combination of superior ac and dc per-

formance.

4. The AD712 has a guaranteed and tested maximum voltage

noise of 4 mV p-p, 0.1 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.

REV. A

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

AD712–SPECIFICATIONS

(V S =

15 V @ T A = +25

C unless otherwise noted)

AD712J/A/S

AD712K/B/T

AD712C

Parameter

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Units

INPUT OFFSET VOLTAGE 1

Initial Offset

0.3

3 / 1 / 1

0.2

1.0 / 0.7 / 0.7

0.1

0.3

T MIN to T MAX

4/2/ 2

2.0 / 1.5 / 1.5

0.6

vs. Temp

20/20/ 20

mV/°C

vs. Supply

100

110

T MIN to T MAX

76/76/ 76

Long-Term Offset Stability

mV/Month

INPUT BIAS CURRENT 2

V CM = 0 V

V CM = 0 V @ T 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

V CM = ± 10 V

100

INPUT OFFSET CURRENT

V CM = 0 V

V CM = 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

MATCHING CHARACTERISTICS

Input Offset Voltage

3 / 1 / 1

1.0 / 0.7 / 0.7

0.3

T MIN to T MAX

4/2/ 2

2.0 / 1.5 / 1.5

0.6

Input Offset Voltage Drift

20/20/ 20

mV/°C

Input Bias Current

Crosstalk @ f = 1 kHz

120

@ f = 100 kHz

FREQUENCY RESPONSE

Small Signal Bandwidth

3.0

4.0

3.4

4.0

3.4

4.0

MHz

Full Power Response

200

kHz

Slew Rate

V/ms

Settling Time to 0.01%

1.0

1.2

1.0

1.2

1.0

1.2

Total Harmonic Distortion

0.0003

INPUT IMPEDANCE

Differential

3 ´ 10 12

i 5.5

3 ´ 10 12

i 5.5

3 ´ 10 12

i 5.5

W i pF

Common Mode

3 ´ 10 12

i 5.5

3 ´ 10 12

i 5.5

3 ´ 10 12

i 5.5

W i pF

INPUT VOLTAGE RANGE

Differential 3

± 20

Common-Mode Voltage 4

+14.5, –11.5

T MIN to T MAX

–V S + 4

+V S – 2

–V S + 4

+V S –2

–V S + 4

+V S – 2 V

Common-Mode

Rejection Ratio

V CM = ± 10 V

T MIN to T MAX

76/76/ 76

V CM = ± 11 V

T MIN to T MAX

70/70/ 70

INPUT VOLTAGE NOISE

mV p-p

nV/ÖHz

INPUT CURRENT NOISE

0.01

pA/ÖHz

OPEN-LOOP GAIN

150

400

200

400

200

400

V/mV

100/100/ 100

100

V/mV

OUTPUT CHARACTERISTICS

Voltage

+13, –12.5 +13.9, –13.3

± 12/± 12/6 12 +13.8, –13.1

6 12

+13.8, –13.1

6 12

+13.8, –13.1

Current

POWER SUPPLY

Rated Performance

± 15

Operating Range

6 4.5

6 18

6 4.5

6 18

6 4.5

6 18

Quiescent Current

5.0

6.8

5.0

6.0

5.0

5.6

NOTES

1 Input Offset Voltage specifications are guaranteed after 5 minutes of operation at T A = +25°C.

2 Bias Current specifications are guaranteed maximum at either input after 5 minutes of operation at T A = +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 subject to change without notice.

–2–

REV. A

AD712

ABSOLUTE MAXIMUM RATINGS 1

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ORDERING GUIDE

± 18 V

Internal Power Dissipation 2

Input Voltage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V

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

Differential Input Voltage . . . . . . . . . . . . . . . . . . +V S and –V S

Storage Temperature Range (Q, H) . . . . . . . . –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

permanent damage to the device. This is a stress rating only and 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-Pin Plastic Package:

Temperature

Package

Model

Range

Description

Option

AD712ACHIPS

–40°C to +85°C Bare Die

AD712AH

–40°C to +85°C 8-Pin Metal Can

H-08A

AD712AQ

–40°C to +85°C 8-Pin Ceramic DIP

Q-8

AD712BH

–40°C to +85°C 8-Pin Metal Can

H-08A

AD712BQ

–40°C to +85°C 8-Pin Ceramic DIP

Q-8

AD712CH

–40°C to +85°C 8-Pin Metal Can

H-08A

AD712CQ

–40°C to +85°C 8-Pin Ceramic DIP

Q-8

AD712JN

0°C to +70°C

8-Pin Plastic DIP

N-8

AD712JR

0°C to +70°C

8-Pin Plastic SOIC

R-8

AD712JR-REEL

0°C to +70°C

8-Pin Plastic SOIC

R-8

AD712JR-REEL7

0°C to +70°C

8-Pin Plastic SOIC

R-8

AD712KN

0°C to +70°C

8-Pin Plastic DIP

N-8

AD712KR

0°C to +70°C

8-Pin Plastic SOIC

R-8

AD712KR-REEL

0°C to +70°C

8-Pin Plastic SOIC

R-8

AD712KR-REEL7 0°C to +70°C

8-Pin Plastic SOIC

R-8

AD712SCHIPS

–55°C to +125°C Bare Die

AD712SQ

–55°C to +125°C 8-Pin Ceramic DIP

Q-8

q JA = 165

C/Watt

AD712SQ/883B

–55°C to +125°C 8-Pin Ceramic DIP

Q-8

8-Pin Cerdip Package:

q JC = 22

C/Watt;

q JA = 110

C/Watt

AD712TQ

–55°C to +125°C 8-Pin Ceramic DIP

Q-8

8-Pin Metal Can Package:

q JC = 65

C/Watt;

q JA = 150

C/Watt

AD712TQ/883B

–55°C to +125°C 8-Pin Ceramic DIP

Q-8

8-Pin SOIC Package:

q JA = 100

3 For supply voltages less than

18 V, the absolute maximum input voltage is equal

to the supply voltage.

METALIZATION PHOTOGRAPH

Dimensions shown in inches and (mm)

Contact factory for latest dimensions.

REV. A

–3–

–Typical Characteristics

Figure 1. Input Voltage Swing vs.

Supply Voltage

Figure 2. Output Voltage Swing vs.

Supply Voltage

Figure 3. Output Voltage Swing

vs. Load Resistance

Figure 4. Quiescent Current vs.

Supply Voltage

Figure 5. Input Bias Current vs.

Temperature

Figure 6. Output Impedance vs.

Frequency

Figure 7. Input Bias Current vs.

Common Mode Voltage

Figure 8. Short Circuit Current

Limit vs. Temperature

Figure 9. Unity Gain Bandwidth vs.

Temperature

–4–

REV. A

AD712

AD712

Figure 10. Open-Loop Gain and

Phase Margin vs. Frequency

Figure 11. Open-Loop Gain vs.

Supply Voltage

Figure 12. Power Supply Rejection

vs. Frequency

Figure 13. Common Mode Rejec-

tion vs. Frequency

Figure 14. Large Signal Frequency

Response

Figure 15. Output Swing and Error

vs. Settling Time

Figure 16. Total Harmonic Distor-

tion vs. Frequency

Figure 17. Input Noise Voltage

Spectral Density

Figure 18. Slew Rate vs. Input

Error Signal

REV. A

–5–

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