TLC27M4 Datasheet, PDF (34/37 Pages) Texas Instruments – LinCMOSE PRECISION QUAD OPERATIONAL AMPLIFIERS

TLC27M4, TLC27M4A, TLC27M4B, TLC27M4Y, TLC27M9
LinCMOS™ PRECISION QUAD OPERATIONAL AMPLIFIERS
SLOS093C – OCTOBER 1987 – REVISED MAY 1999
APPLICATION INFORMATION
latch-up (continued)
The current path established if latch-up occurs is usually between the positive supply rail and ground; it can be
triggered by surges on the supply lines and/or voltages on either the output or inputs that exceed the supply
voltage. Once latch-up occurs, the current flow is limited only by the impedance of the power supply and the
forward resistance of the parasitic thyristor and usually results in the destruction of the device. The chance of
latch-up occurring increases with increasing temperature and supply voltages.
470 kΩ
1N4148
100 kΩ
5V
1/4
TLC27M4
47 kΩ
VO
100 kΩ
1 µF
100 kΩ
R1
68 kΩ
R2
68 kΩ
C1
2.2 nF
C2
2.2 nF
NOTE: VOPP ≈ 2 V
1
fO = _{2π √R1R2C1C2}
Figure 44. Wien Oscillator
5V
1/4
VI
+
TLC27M9
–
IS
2N3821
R
NOTE: VI = 0 V to 3 V
IS =
VI
R
Figure 45. Precision Low-Current Sink
34
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265