Datasheet

TLC27M4, TLC27M4A, TLC27M4B, TLC27M4Y, TLC27M9
LinCMOS PRECISION QUAD OPERATIONAL AMPLIFIERS
SLOS093C – OCTOBER 1987 – REVISED MAY 1999
34
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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.
–
+
R2
68 kΩ
2.2 nF
C2
V
O
1N4148
470 kΩ
100 kΩ
C1
2.2 nF
68 kΩ
R1
47 kΩ
100 kΩ
1 µF
100 kΩ
5 V
1/4
TLC27M4
NOTE: V
OPP
≈ 2 V
f
O
=
1
2π √R1R2C1C2
Figure 44. Wien Oscillator
V
I
R
5 V
I
S
2N3821
–
+
1/4
TLC27M9
NOTE: V
I
= 0 V to 3 V
I
S
=
V
I
R
Figure 45. Precision Low-Current Sink