Dual Precision, Low Cost,
High Speed, BiFET Op Amp
a
AD712
FEATURES
CONNECTION DIAGRAMS
Enhanced Replacements for LF412 and TL082
TO-99
(H) Package
AC PERFORMANCE
Settles to ؎0.01% in 1.0 ms
16 V/s min Slew Rate (AD712J)
3 MHz min Unity Gain Bandwidth (AD712J)
+V
AMPLIFIER NO. 1
OUTPUT
AMPLIFIER NO. 2
OUTPUT
S
INVERTING
OUTPUT
INVERTING
INPUT
DC PERFORMANCE
0.30 mV max Offset Voltage: (AD712C)
5 V/؇C max Drift: (AD712C)
AD712
NONINVERTING
INPUT
NONINVERTING
OUTPUT
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 Accor-
dance with EIA-481A Standard
–V
S
Plastic Mini-DIP (N) Package
SOIC (R) Package and Cerdip (Q) Package
AMPLIFIER NO. 1
AMPLIFIER NO. 2
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
1
8
V+
OUTPUT
INVERTING
OUTPUT
2
3
4
OUTPUT
7
6
5
NONINVERTING
OUTPUT
INVERTING
INPUT
NONINVERTING
INPUT
V–
AD712
PRODUCT DESCRIPTION
screening includes 168-hour burn-in, as well as other environ-
mental and physical tests.
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 AD712 is available in an 8-lead plastic mini-DIP, SOIC,
cerdip, TO-99 metal can, or in chip form.
PRODUCT HIGHLIGHTS
1. The AD712 offers excellent overall performance at very
competitive prices.
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 D/A and A/D Converters and as a high-speed
integrator. The settling time is unmatched by any similar IC
amplifier.
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 µV/°C max on the AD712C.
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.
3. Along with precision dc performance, the AD712 offers
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 which re-
quire a combination of superior ac and dc performance.
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-883-B, Rev. C.
4. The AD712 has a guaranteed and tested maximum voltage
noise of 4 µV 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.
Extended reliability PLUS screening is available, specified over
the commercial and industrial temperature ranges. PLUS
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: 781/329-4700
Fax: 781/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 1998
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