AD712_06 AD [Analog Devices], AD712_06 Datasheet

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AD712_06

Manufacturer Part Number
AD712_06
Description
Dual Precision, Low Cost, High Speed BiFET Op Amp
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
Enhanced replacement for LF412 and TL082
AC performance
DC performance
GENERAL 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/μs
and a settling time of 1 μs to ±0.01%, the AD712 is ideal as a
buffer for 12-bit digital-to-analog and analog-to-digital
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 is rated over the industrial tempera-
ture range of −40°C to +85°C. The AD712S is rated over the
Rev. G
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.
Trademarks and registered trademarks are the property of their respective owners.
Settles to ±0.01% in 1.0 μs
16 V/μs minimum slew rate (AD712J)
3 MHz minimum unity-gain bandwidth (AD712J)
Available in PDIP, SOIC_N, and CERDIP packages
200 V/mV minimum open-loop gain (AD712K)
Surface mount available in tape and reel in
MIL-STD-883B parts available
Single version available: AD711
Quad version: AD713
accordance with the EIA-481A standard
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
military temperature range of −55°C to +125°C and is available
processed to MIL-STD-883B, Rev. C.
Extended reliability PLUS screening is available, specified over
the commercial and industrial temperature ranges. PLUS
screening includes 168-hour burn-in, in addition to other
environmental and physical tests.
The AD712 is available in 8-lead PDIP, SOIC_N, and CERDIP
packages.
PRODUCT HIGHLIGHTS
1. The AD712 offers excellent overall performance at very
2. The Analog Devices, Inc. advanced processing technology
3. Together with precision dc performance, the AD712 offers
competitive prices.
and 100% testing guarantee a low input offset voltage (3 mV
maximum, J grade). Input offset voltage is specified in the
warmed-up condition.
excellent dynamic response. It settles to ±0.01% in 1 μs and
has a minimum slew rate of 16 V/μs. Thus, this device is ideal
for applications such as DAC and ADC buffers that require a
combination of superior ac and dc performance.
High Speed BiFET Op Amp
Dual Precision, Low Cost,
NONINVERTING
AMPLIFIER NO. 1
INVERTING
SOIC_N (R-Suffix), and CERDIP (Q-Suffix)
OUTPUT
CONNECTION DIAGRAM
INPUT
INPUT
Figure 1. 8-Lead PDIP (N-Suffix),
V–
©2006 Analog Devices, Inc. All rights reserved.
1
2
3
4
AD712
8
7
6
5
AMPLIFIER NO. 2
V+
OUTPUT
INVERTING
INPUT
NONINVERTING
INPUT
www.analog.com
AD712

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AD712_06 Summary of contents

Page 1

FEATURES Enhanced replacement for LF412 and TL082 AC performance Settles to ±0.01% in 1.0 μs 16 V/μs minimum slew rate (AD712J) 3 MHz minimum unity-gain bandwidth (AD712J) DC performance 200 V/mV minimum open-loop gain (AD712K) Surface mount available in tape ...

Page 2

AD712 TABLE OF CONTENTS Features .............................................................................................. 1 Connection Diagram ....................................................................... 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Typical Performance Characteristics ............................................. 6 Settling Time ................................................................................... ...

Page 3

SPECIFICATIONS V = ± 25°C, unless otherwise noted. 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 ...

Page 4

AD712 Parameter Min INPUT CURRENT NOISE OPEN-LOOP GAIN 150 100/100/100 OUTPUT CHARACTERISTICS Voltage +13, −12.5 ±12/±12/±12 Current POWER SUPPLY Rated Performance Operating Range ±4.5 Quiescent Current 1 Input offset voltage specifications are guaranteed after 5 minutes of operation at T ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage 1 Internal Power Dissipation 2 Input Voltage Output Short-Circuit Duration Differential Input Voltage Storage Temperature Range Q-Suffix N-Suffix and R-Suffix Operating Temperature Range AD712J/K AD712A AD712S Lead Temperature Range (Soldering 60 sec) ...

Page 6

AD712 TYPICAL PERFORMANCE CHARACTERISTICS 2kΩ L 25° SUPPLY VOLTAGE ± V Figure 2. Input Voltage Swing vs. Supply Voltage 2kΩ L 25° ...

Page 7

MAX J GRADE LIMIT 15V S 25° –10 – COMMON MODE VOLTAGE (V) Figure 8. Input Bias Current vs. Common-Mode Voltage OUTPUT CURRENT – OUTPUT ...

Page 8

AD712 100 100 1k 10k FREQUENCY (Hz) Figure 14. Common-Mode Rejection vs. Frequency 100k 1M FREQUENCY (Hz) Figure 15. Large Signal Frequency Response ...

Page 9

TEMPERATURE (°C) Figure 20. Slew Rate vs. Temperature +V S 0.1µ 1/2 AD712 INPUT 2kΩ – 4 0.1µF –V S Figure 21. THD Test Circuit V OUT ...

Page 10

AD712 5kΩ 0.1µF 5kΩ – IN 1/2 AD712 SQUARE + 4 WAVE 0.1µF INPUT –V S Figure 26. Unity-Gain Inverter 100 Figure 27. Unity-Gain Inverter Pulse Response (Large Signal) V OUT R ...

Page 11

SETTLING TIME OPTIMIZING SETTLING TIME Most bipolar high speed digital-to-analog converters (DACs) have current outputs; therefore, for most applications, an external op amp is required for a current-to-voltage conversion. The settling time of the converter/op amp combination depends on the ...

Page 12

AD712 1mV 5V 100 90 SUMMING JUNCTION 0V OUTPUT 10 0% –10V Figure 30. Settling Characteristics for AD712 with AD565A, Full-Scale Negative Transition 1mV 5V 100 90 SUMMING JUNCTION 0V OUTPUT 10 0% –10V Figure 31. Settling Characteristics for AD712 ...

Page 13

Figure 34. Value of Capacitor C F The photos of Figure 35 and Figure 36 show the dynamic response ...

Page 14

AD712 APPLICATIONS INFORMATION GUARDING The low input bias current (15 pA) and low noise characteristics of the AD712 BiFET op amp make it suitable for electrometer applications such as photo diode preamplifiers and picoampere current-to-voltage converters. The use of a ...

Page 15

Figure 41 and Figure 42 show the settling time characteristics of the AD712 when used as a DAC output buffer for the AD7545. 1mV 100 Figure 41. Positive Settling Characteristics for AD712 with AD7545 1mV 100 ...

Page 16

AD712 1mV PD711 BUFF 100 500mV –10V ADC IN Figure 44. ADC Input Unity Gain Buffer Recovery Times, −10 V ADC IN PD711 BUFF 1mV 100 500mV –5V ADC IN Figure 45. ADC Input ...

Page 17

FILTERS ACTIVE FILTER APPLICATIONS In active filter applications using op amps, the dc accuracy of the amplifier is critical to optimal filter performance. The amplifier offset voltage and bias current contribute to output error. Offset voltage is passed by the ...

Page 18

AD712 +15V 0.1µ 0.001µF A1 AD711 – 0.1µF –15V 100kΩ 9-POLE CHEBYCHEV FILTER Figure 50 and Figure 51 show the AD712 and its dual counterpart, the AD711 9-pole Chebychev filter using active frequency dependent negative ...

Page 19

OUTLINE DIMENSIONS 0.400 (10.16) 0.365 (9.27) 0.355 (9.02 0.280 (7.11) 0.250 (6.35) 1 0.240 (6.10) 4 PIN 1 0.100 (2.54) BSC 0.060 (1.52) 0.210 MAX (5.33) MAX 0.015 0.150 (3.81) (0.38) 0.015 (0.38) MIN 0.130 (3.30) GAUGE PLANE ...

Page 20

AD712 ORDERING GUIDE Model Temperature Range AD712AQ −40°C to +85°C AD712JN 0°C to 70°C 1 AD712JNZ 0°C to 70°C AD712JR 0°C to 70°C AD712JR-REEL 0°C to 70°C AD712JR-REEL7 0°C to 70°C 1 AD712JRZ 0°C to 70°C AD712JRZ-REEL 1 0°C to ...

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