operational amplifier. It is fabricated using Analog Devices鈥?/div>
complementary bipolar (CB) process. Advanced laser-wafer
and offset voltage drift performance to be realized. This preci-
鈩︹€?/div>
represents a combination of features unmatched by any FET
input IC amplifier. The AD845 can easily be used to upgrade
many existing designs which use BiFET or FET input hybrid
amplifiers and, in some cases, those which use bipolar input op
amps.
The AD845 is ideal for use in applications such as active filters,
high speed integrators, photo diode preamps, sample-and-hold
amplifiers, log amplifiers, and in buffering A/D and D/A con-
verters. The 250
碌V
max input offset voltage makes offset null-
ing unnecessary in many applications. The common-mode
rejection ratio of 110 dB over a
鹵
10 V input voltage range
represents exceptional performance for a JFET input high
speed op amp. This, together with a minimum open-loop
gain of 250 V/mV ensures that 12-bit performance is achieved,
even in unity-gain buffer circuits.
The AD845 conforms to the standard op amp pinout except
that offset nulling is to V+. The AD845J and AD845K grade
devices are available specified to operate over the commercial
0擄C to +70擄C temperature range. AD845A and AD845B
devices are specified for operation over the 鈥?0擄C to +85擄C
industrial temperature range. The AD845S is specified to oper-
ate over the full military temperature range of 鈥?5擄C to
+125擄C. Both the industrial and military versions are available
in 8-pin cerdip packages. The commercial version is available in
an 8-pin plastic mini-DIP and 16-pin SOIC; 鈥淛鈥?and 鈥淪鈥?grade
chips are also available.
PRODUCT HIGHLIGHTS
1. The high slew rate, fast settling time, and dc precision of the
AD845 make it ideal for high speed applications requiring
12-bit accuracy.
2. The performance of circuits using the LF400, HA2520/2/5,
HA2620/2/5, 3550, OPA605, and LH0062 can be upgraded
in most cases.
3. The AD845 is unity-gain stable and internally compensated.
4. The AD845 is specified while driving 100 pF/500
鈩?/div>
loads.
REV. D
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
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