AD746 Analog Devices, AD746 Datasheet

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AD746

Manufacturer Part Number
AD746
Description
Dual Precision, 500 ns Settling, BiFET Op Amp
Manufacturer
Analog Devices
Datasheet

Specifications of AD746

Vcc-vee
9.6V to 36V
Isy Per Amplifier
4mA
Packages
DIP,SOIC
-3db Bandwidth
13MHz
Slew Rate
75V/µs
Vos
300µV
Ib
110pA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
16nV/rtHz

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a
PRODUCT DESCRIPTION
The AD746 is a dual operational amplifier, consisting of two
AD744 BiFET op amps on a single chip. These precision
monolithic op amps offer excellent dc characteristics plus rapid
settling times, high slew rates and ample bandwidths. In
addition, the AD746 provides the close matching ac and dc
characteristics inherent to amplifiers sharing the same
monolithic die.
The single pole response of the AD746 provides fast settling:
500 ns to 0.01%. This feature, combined with its high dc
precision, makes it suitable for use as a buffer amplifier for 12-
or 14-bit DACs and ADCs. Furthermore, the AD746’s low total
harmonic distortion (THD) level of 0.0001% and very close
matching ac characteristics make it an ideal amplifier for many
demanding audio applications.
The AD746 is internally compensated for stable operation as a
unity gain inverter or as a noninverting amplifier with a gain of 2
or greater. It is available in four performance grades. The
AD746J is rated over the commercial temperature range of 0 to
+70 C. The AD746A and AD746B are rated over the industrial
temperature range of –40 C to +85 C. The AD746S is rated
over the military temperature range of –55 C to +125 C and is
available processed to MIL-STD-883B, Rev. C.
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.
FEATURES
AC PERFORMANCE
500 ns Settling to 0.01% for 10 V Step
75 V/ s Slew Rate
0.0001% Total Harmonic Distortion (THD)
13 MHz Gain Bandwidth
Internal Compensation for Gains of +2 or Greater
DC PERFORMANCE
0.5 mV max Offset Voltage (AD746B)
10
175 V/mV min Open Loop Gain (AD746B)
2 V p-p Noise, 0.1 Hz to 10 Hz
Available in Plastic Mini-DIP, Cerdip and Surface
Available in Tape and Reel in Accordance with
MIL-STD-883B Processing also Available
Single Version: AD744
APPLICATIONS
Dual Output Buffers for 12- and 14-Bit DACs
Input Buffers for Precision ADCs, Wideband
Mount Packages
EIA-481A Standard
Preamplifiers and Low Distortion Audio Circuitry
V/ C max Drift (AD746B)
PRODUCT HIGHLIGHTS
1. The AD746 offers exceptional dynamic response for high
2. Outstanding dc precision is provided by a combination of
3. Differential and multichannel systems will benefit from the
4. The AD746 has very close, guaranteed matching of input
5. Unity gain stable version AD712 also available.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
The AD746 is available in three 8-pin packages: plastic mini
DIP, hermetic cerdip and surface mount (SOIC).
speed data acquisition systems. It settles to 0.01% in 500 ns
and has a 100% tested minimum slew rate of 50 V/ s
(AD746B).
Analog Devices’ advanced processing technology, laser wafer
drift trimming and well-matched ion-implanted JFETs. Input
offset voltage, input bias current and input offset current are
specified in the warmed-up condition and are 100% tested.
AD746’s very close matching of ac characteristics. Input
offset voltage specs are fully tested and guaranteed to a
maximum of 0.5 mV (AD746B).
bias current between its two amplifiers.
CONNECTION DIAGRAM
Plastic SOIC (R) Packages
Settling, BiFET Op Amp
Dual Precision, 500 ns
Plastic Mini-DIP (N)
Cerdip (Q) and
AD746
Fax: 617/326-8703

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AD746 Summary of contents

Page 1

... It is available in four performance grades. The AD746J is rated over the commercial temperature range +70 C. The AD746A and AD746B are rated over the industrial temperature range of – +85 C. The AD746S is rated over the military temperature range of – +125 C and is available processed to MIL-STD-883B, Rev. C. ...

Page 2

... MAX +13, –12.5 +13.9, –13.3 +13, –12.5 +13.9, –13.3 12 +13.8, –13.1 12 MAX 25 50 500 15 4 +70/–40 to +85 AD746JN AD746AQ AD746JR AD746JR-REEL 54 –2– AD746S Typ Max Min Typ Max Units 0.25 0.5 0.3 1.0 0.7 1 100 110 150 110 250 7 9.6 113 ...

Page 3

... Differential Input Voltage . . . . . . . . . . . . . . . . . . +V Storage Temperature Range ( – +150 C Storage Temperature Range ( – +125 C Operating Temperature Range AD746J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +70 C AD746A – +85 C AD746S . . . . . . . . . . . . . . . . . . . . . . . . . . . – +125 C 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 ...

Page 4

... AD746 –Typical Characteristics Figure 1. Input Voltage Swing vs. Supply Voltage Figure 4. Quiescent Current vs. Supply Voltage Figure 7. Input Bias Current vs. Common Mode Voltage Figure 2. Output Voltage Swing vs. Supply Voltage Figure 5. Input Bias Current vs. Temperature Figure 8. Short Circuit Current Limit vs. Temperature –4– Figure 3. Output Voltage Swing vs ...

Page 5

... REV. B Figure 11. Settling Time vs. Closed Loop Voltage Gain Figure 14. Large Signal Frequency Response Figure 17. Input Noise Voltage Spectral Density –5– AD746 Figure 12. Open Loop Gain vs. Supply Voltage Figure 15. Output Swing and Error vs. Settling Time Figure 18. Slew Rate vs. Input Error Signal ...

Page 6

... A minimum bypass capacitance of 0.1 F should be used for any application. If only one of the two amplifiers inside the AD746 utilized, the unused amplifier should be connected as shown in Figure 21a. Note that the noninverting input should be grounded and that R ...

Page 7

... The AD746 was carefully optimized to offer excellent performance in terms of total harmonic distortion (THD) in signal processing applications. The THD level when operating the AD746 in inverting gain applications will show a gradual rise from the distortion floor of 20 dB/decade (see Figure 28). In noninverting applications, care should be taken to balance ...

Page 8

... AD746 SINE WAVE + 3 4 GENERATOR 20V p-p –V OUTPUT S LEVEL 1 F 20k + 2.21k 6 – 8 1/2 7 AD746 + 5 CROSSTALK = 20 LOG Figure 29. Crosstalk Test Circuit Figure 30. Crosstalk vs. Frequency V OUT #1 1 20V p OUT # OUT + 20dB OUT –8– OUTLINE DIMENSIONS Dimensions shown in inches and (mm) ...

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