OP777ARM AD [Analog Devices], OP777ARM Datasheet

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OP777ARM

Manufacturer Part Number
OP777ARM
Description
Precision Micropower Single Supply Operational Amplifier
Manufacturer
AD [Analog Devices]
Datasheet

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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.
FUNCTIONAL BLOCK DIAGRAMS
Precision Micropower
V
NC
IN
IN
Operational Amplifier
+IN
NC
V
IN
NC = NO CONNECT
NC = NO CONNECT
8-Lead MSOP
8-Lead SOIC
1
2
3
4
(RM Suffix)
1
4
(R Suffix)
OP777
OP777
8
5
Single Supply
8
7
6
5
NC
V+
OUT
NC
NC
V+
NC
OUT
OP777

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OP777ARM Summary of contents

Page 1

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 ± supplies and offers the further advantage of true ...

Page 2

OP777–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short Circuit Limit POWER SUPPLY ...

Page 3

ELECTRICAL CHARACTERISTICS Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short Circuit Limit POWER SUPPLY Power ...

Page 4

... Exposure to absolute maximum rating condi- tions for extended periods may affect device reliability. Temperature Model Range OP777ARM –40°C to +85°C OP777AR –40°C to +85°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 5

V = 15V SY 200 180 A 160 140 120 100 100 100 OFFSET VOLTAGE – V ...

Page 6

OP777 15V LOAD R = LOAD 100 1k 10k 100k 1M 10M 100M FREQUENCY – ...

Page 7

V = 15V 300pF 100mV IN TIME – 10 s/DIV INPUT +200mV 15V 10k 100 200mV IN 0V ...

Page 8

OP777 140 V = 15V SY 120 100 +PSRR 80 PSRR 100 1k 10k 100k 1M 10M FREQUENCY – 15V ...

Page 9

1mA L 4.94 4.93 4.92 4.91 4.90 4. 100 120 140 TEMPERATURE – C 14.930 V = 15V 1mA L 14.935 14.940 ...

Page 10

OP777 BASIC OPERATION The OP777 amplifier uses a precision Bipolar PNP input stage coupled with a high-voltage CMOS output stage. This enables this amplifier to feature an input voltage range which includes the negative supply voltage (often ground-in single-supply applications) ...

Page 11

Phase Reversal Many amplifiers misbehave when one or both of the inputs are forced beyond the input common-mode voltage range. Phase reversal is typified by the transfer function of the amplifier, effectively reversing its transfer polarity. In some cases this ...

Page 12

OP777 The OP777 can be very useful in many single supply bridge applica- tions. Figure 49 shows a single supply bridge circuit in which its output is linearly proportional to the fractional deviation ( ) of the bridge. Note that ...

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