OP27GU Datasheet, PDF (14/22 Pages) Texas Instruments – LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS

OP27A, OP27C
LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL-AMPLIFIER
SLOS100E − FEBRUARY 1989 − REVISED FEBRUARY 2010
TYPICAL CHARACTERISTICS
OP27
VOLTAGE FOLLOWER
SMALL-SIGNAL
PULSE RESPONSE
80
8
OP27
VOLTAGE FOLLOWER
LARGE-SIGNAL
PULSE RESPONSE
60
6
40
4
20
2
0
0
− 20
−2
− 40
− 60
V_{CC ±} = ± 15 V
A_V = 1
C_L = 15 pF
T_A = 25°C
− 80
0 0.5 1 1.5 2 2.5 3
t − Time − μs
Figure 24
−4
V_{CC ±} = ± 15 V
−6
A_V = − 1
T_A = 25°C
−8
0 2 4 6 8 10 12
t − Time − μs
Figure 25
APPLICATION INFORMATION
general
The OP27 series devices can be inserted directly onto OP07, OP05, μA725, and SE5534 sockets with or without
removing external compensation or nulling components. In addition, the OP27 can be fitted to μA741 sockets
by removing or modifying external nulling components.
noise testing
Figure 26 shows a test circuit for 0.1-Hz to 10-Hz peak-to-peak noise measurement of the OP27. The frequency
response of this noise tester indicates that the 0.1-Hz corner is defined by only one zero. Because the time limit
acts as an additional zero to eliminate noise contributions from the frequency band below 0.1 Hz, the test time
to measure 0.1-Hz to 10-Hz noise should not exceed 10 seconds.
Measuring the typical 80-nV peak-to-peak noise performance of the OP27 requires the following special test
precautions:
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