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OP27AZPMIN/a5avaiLow-Noise, Precision Operational Amplifier
OP27AZ. |OP27AZADN/a1000avaiLow-Noise, Precision Operational Amplifier
OP27CZADN/a1000avaiLow-Noise, Precision Operational Amplifier
OP27CZAD/BBN/a2360avaiLow-Noise, Precision Operational Amplifier
OP27EJADN/a500avaiLow-Noise, Precision Operational Amplifier
OP27EPADN/a36avaiLow-Noise, Precision Operational Amplifier
OP27EZADN/a1820avaiLow-Noise, Precision Operational Amplifier
OP27FPADN/a21avaiLow-Noise, Precision Operational Amplifier
OP27FPPMIN/a13avaiLow-Noise, Precision Operational Amplifier
OP27GJADIN/a83avaiLow-Noise, Precision Operational Amplifier
OP27GPADN/a510avaiLow-Noise, Precision Operational Amplifier
OP27GSAD ?N/a100avaiLow-Noise, Precision Operational Amplifier
OP27GZADN/a1037avaiLow-Noise, Precision Operational Amplifier


OP27CZ ,Low-Noise, Precision Operational AmplifierGENERAL DESCRIPTION4V– (CASE)The OP27 precision operational amplifier combines the lowNC = NO CONNE ..
OP27CZ ,Low-Noise, Precision Operational AmplifierCHARACTERISTICS (@ V = ±15 V, T = 25C, unless otherwise noted.)S A OP27A/E OP27F ..
OP27E , LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS
OP27EJ ,Low-Noise, Precision Operational AmplifierGENERAL DESCRIPTION4V– (CASE)The OP27 precision operational amplifier combines the lowNC = NO CONNE ..
OP27EP ,Low-Noise, Precision Operational AmplifierLow-Noise, PrecisionaOperational AmplifierOP27
OP27EZ ,Low-Noise, Precision Operational AmplifierFEATURES PIN CONNECTIONSLow Noise: 80 nV p-p (0.1 Hz to 10 Hz), 3 nV/√HzTO-99Low Drift: 0.2 V/C(J ..
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OP27AZ-OP27AZ.-OP27CZ-OP27EJ-OP27EP-OP27EZ-OP27FP-OP27GJ-OP27GP-OP27GS-OP27GZ
Low-Noise, Precision Operational Amplifier
REV.A
Low-Noise, Precision
Operational Amplifier
PIN CONNECTIONS
TO-99
(J-Suffix)
OUT
4V– (CASE)
BAL
BAL 1
–IN 2
+IN 3
OP27
NC = NO CONNECT
FEATURES
Low Noise: 80 nV p-p (0.1 Hz to 10 Hz), 3 nV/√Hz
Low Drift: 0.2 �V/�C
High Speed: 2.8 V/�s Slew Rate, 8 MHz Gain
Bandwidth
Low VOS: 10 �V
Excellent CMRR: 126 dB at VCM of ±11 V
High Open-Loop Gain: 1.8 Million
Fits 725, OP07, 5534A Sockets
Available in Die Form
GENERAL DESCRIPTION

The OP27 precision operational amplifier combines the low
offset and drift of the OP07 with both high speed and low noise.
Offsets down to 25 µV and drift of 0.6 µV/°C maximum make
the OP27 ideal for precision instrumentation applications.
Exceptionally low noise, en = 3.5 nV/√Hz, at 10 Hz, a low 1/f
noise corner frequency of 2.7 Hz, and high gain (1.8 million),
allow accurate high-gain amplification of low-level signals. A
gain-bandwidth product of 8 MHz and a 2.8 V/µsec slew rate
provides excellent dynamic accuracy in high-speed, data-
acquisition systems.
A low input bias current of ±10 nA is achieved by use of a
bias-current-cancellation circuit. Over the military temperature
range, this circuit typically holds IB and IOS to ±20 nA and 15 nA,
respectively.
The output stage has good load driving capability. A guaranteed
swing of ±10 V into 600 Ω and low output distortion make the
OP27 an excellent choice for professional audio applications.
(Continued on page 7)
Figure 1.Simplified Schematic
8-Pin Hermetic DIP
(Z-Suffix)
Epoxy Mini-DIP
(P-Suffix)
8-Pin SO
(S-Suffix)
OP27
ELECTRICAL CHARACTERISTICS

INPUT NOISE
INPUT
RESISTANCE
NOTESInput offset voltage measurements are performed ~ 0.5 seconds after application of power. A/E grades guaranteed fully warmed up.Long-term input offset voltage stability refers to the average trend line of VOS versus. Time over extended periods after the first 30 days of operation. Excluding the
initial hour of operation, changes in VOS during the first 30 days are typically 2.5 µV. Refer to typical performance curve.
(@ VS = ±15 V, TA = 25�C, unless otherwise noted.)–SPECIFICATIONS
OP27
(@ VS = ±15 V, –55�C ≤ TA ≤ 125�C, unless otherwise noted.)ELECTRICAL CHARACTERISTICS

AVERAGE INPUT
OFFSET DRIFT
INPUT BIAS
OUTPUT
NOTESInput offset voltage measurements are performed by automated test equipment approximately 0.5 seconds after application of power. A/E grades guaranteed fully
warmed up.The TCVOS performance is within the specifications unnulled or when nulled with RP = 8 kΩ to 20 kΩ. TCVOS is 100% tested for A/E grades, sample tested for
C/F/G grades.Guaranteed by design.
OP27
ELECTRICAL CHARACTERISTICS
(@ VS = ±15 V, –25�C¯≤ TA ≤ 85�C for OP27J, OP27Z, 0�C ≤ TA ≤ 70�C for OP27EP,
OP27FP, and –40�C ≤ TA ≤ 85�C for OP27GP, OP27GS, unless otherwise noted.)

NOTESThe TCVOS performance is within the specifications unnulled or when nulled with RP = 8 kΩ to 20 kΩ. TCVOS is 100% tested for A/E grades, sample tested for
C/F/G grades.Guaranteed by design.
OP27
NOTE
*Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed
for standard product dice. Consult factory to negotiate specifications based on dice lot qualification through sample lot assembly and testing.
WAFER TEST LIMITS(@ VS = ±15 V, TA = 25�C unless otherwise noted.)
DICE CHARACTERISTICS
1. NULL
2. (–) INPUT
3. (+) INPUT
4. V–
6. OUTPUT
7. V+
8. NULL
DIE SIZE 0.109 � 0.055 INCH, 5995 SQ. MILS
(2.77 � 1.40mm, 3.88 SQ. mm)
OP27
NOTE
*Input offset voltage measurements are performed by automated test equipment approximately 0.5 seconds after application of power.
TYPICAL ELECTRICAL CHARACTERISTICS(@ VS = ±15 V, TA = 25�C unless otherwise noted.)
NOTES
1For supply voltages less than ±22 V, the absolute maximum input voltage is
equal to the supply voltage.
2The OP27’s inputs are protected by back-to-back diodes. Current limiting
resistors are not used in order to achieve low noise. If differential input voltage
exceeds ±0.7 V, the input current should be limited to 25 mA.
3�JA is specified for worst-case mounting conditions, i.e., �JA is specified for
device in socket for TO, CERDIP, and P-DIP packages; �JA is specified for
device soldered to printed circuit board for SO package.
4Absolute Maximum Ratings apply to both DICE and packaged parts, unless
otherwise noted.
ABSOLUTE MAXIMUM RATINGS4

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±22 V
Input Voltage1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±22 V
Output Short-Circuit Duration . . . . . . . . . . . . . . . . Indefinite
Differential Input Voltage2 . . . . . . . . . . . . . . . . . . . . . . ±0.7 V
Differential Input Current2 . . . . . . . . . . . . . . . . . . . . ±25 mA
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Operating Temperature Range
OP27A, OP27C (J, Z) . . . . . . . . . . . . . . . . –55°C to +125°C
OP27E, OP27F (J, Z) . . . . . . . . . . . . . . . . . –25°C to +85°C
OP27E, OP27F (P) . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
OP27G (P, S, J, Z) . . . . . . . . . . . . . . . . . . –40°C to +85°C
Lead Temperature Range (Soldering, 60 sec) . . . . . . . 300°C
Junction Temperature . . . . . . . . . . . . . . . . . –65°C to +150°C
ORDERING INFORMATION1

NOTESBurn-in is available on commercial and industrial temperature range parts in CERDIP, plastic
DIP, and TO-can packages.For devices processed in total compliance to MIL-STD-883, add /883 after part number.
Consult factory for 883 data sheet.Not for new design; obsolete April 2002.For availability and burn-in information on SO and PLCC packages, contact your local
sales office.
CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the OP27 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
(Continued from page 1)
PSRR and CMRR exceed 120 dB. These characteristics, coupled
with long-term drift of 0.2 µV/month, allow the circuit designer
to achieve performance levels previously attained only by dis-
crete designs.
Low-cost, high-volume production of OP27 is achieved by
using an on-chip Zener zap-trimming network. This reliable
and stable offset trimming scheme has proved its effectiveness
over many years of production history.
The OP27 provides excellent performance in low-noise, high-
accuracy amplification of low-level signals. Applications include
stable integrators, precision summing amplifiers, precision voltage-
threshold detectors, comparators, and professional audio circuits
such as tape-head and microphone preamplifiers.
The OP27 is a direct replacement for 725, OP06, OP07, and
OP45 amplifiers; 741 types may be directly replaced by remov-
ing the 741’s nulling potentiometer.
OP27
TPC 1.0.1 Hz to 10 Hzp-p Noise Tester
Frequency Response
TPC 4.Input Wideband Voltage
Noise vs. Bandwidth (0.1 Hz to
Frequency Indicated)
TPC 7.Voltage Noise Density vs.
Supply Voltage
–Typical Performance Characteristics

TPC 2.Voltage Noise Density vs.
Frequency

TPC 5.Total Noise vs. Sourced
Resistance
TPC 8.Current Noise Density vs.
Frequency
TPC 3.A Comparison of Op Amp
Voltage Noise Spectra

TPC 6.Voltage Noise Density vs.
Temperature
TPC 9.Supply Current vs. Supply
Voltage
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