OP777 Datasheet, PDF (1/12 Pages) Analog Devices – Precision Micropower Single Supply Operational Amplifier

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FEATURES
Low Offset Voltage: 100 ␮V Max
Low Input Bias Current: 10 nA Max
Single-Supply Operation: 2.7 V to 30 V
Dual-Supply Operation: ؎1.35 V to ؎15 V
Low Supply Current: 270 ␮A/Amp
Unity Gain Stable
No Phase Reversal
APPLICATIONS
Precision Current Measurement
Line or Battery-Powered Instrumentation
Remote Sensors
Precision Filters
Precision Micropower
Single Supply
Operational Amplifier
OP777
FUNCTIONAL BLOCK DIAGRAMS
8-Lead MSOP
(RM Suffix)
NC
1
8
NC
؊IN
؉IN
OP777
V+
OUT
V؊
4
5
NC
NC = NO CONNECT
8-Lead SOIC
(R Suffix)
NC 1
؊IN 2
+IN 3
V؊ 4
OP777
8 NC
7 V+
6 OUT
5 NC
NC = NO CONNECT
GENERAL DESCRIPTION
The OP777 is a precision single supply amplifier featuring
micropower operation and rail-to-rail output ranges. This ampli-
fier provides improved performance over the industry-standard
OP07 with ± 15 V supplies and offers the further advantage of
true single supply operation down to 2.7 V, and smaller package
footprint than any other high-voltage precision bipolar amplifier.
Outputs are stable with capacitive loads of over 1000 pF. Supply
current is less than 300 µA per amplifier at 5 V. 500 Ω series resis-
tors protect the inputs, allowing input signal levels to exceed either
power supply rail by up to 3 V without causing phase reversal of the
output signal or causing damage to the amplifier. The proprietary
fabrication process yields a very low-voltage noise corner frequency
under 10 Hz, greatly improving the low-frequency noise perfor-
mance of the OP07 and similar amplifiers. The specially fabricated
input PNP transistors operate with very low input bias currents while
allowing operation with large differential voltages, eliminating a
common limitation of many precision amplifiers and enabling
application of the OP777 in precision comparator and rectifier
circuits. This large differential voltage capability also further reduces
the need for external protection devices such as clamping diodes.
Applications for these amplifiers include both line powered and
portable instrumentation, remote sensor signal conditioning, and
precision filters.
The OP777 is specified over the extended industrial (–40°C to
+85°C) temperature range and is available in 8-lead MSOP and
8-lead SOIC packages. The OP777 uses a standard operational
amplifier pinout, allowing for easy drop-in replacement of lower
performance amplifiers in most circuits. Surface mount devices
in MSOP packages are available in tape and reel only.
REV. 0
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© Analog Devices, Inc., 2000