Datasheet

TL431, A, B Series
9
MOTOROLA ANALOG IC DEVICE DATA
Figure 26. Voltage Monitor Figure 27. Single–Supply Comparator with
Temperature–Compensated Threshold
V
th
= V
ref
V+
V
out
V
in
R1 R3
V+
V
out
R2 R4
l
L.E.D. indicator is ‘on’ when V+ is between the
upper and lower limits.
Lower Limit
1
R1
R2
V
ref
Upper Limit
1
R3
R4
V
ref
V
in
V
out
< V
ref
V+
> V
ref
≈ 2.0 V
Figure 28. Linear Ohmmeter Figure 29. Simple 400 mW Phono Amplifier
* Thermalloy
* THM 6024
* Heatsink on
* LP Package
*
T
l
= 330 to 8.0
Ω
8.0 Ω
+
–
LM11
2.0 mA
25 V
25 V
–5.0 V
V
out
Range
V
1.0 M
Ω
V
100 k
Ω
V
V
1.0 k
Ω
R
X
5.0 M
1%
500 k
1%
50 k
1%
5.0 k
1%
47 k
Tone
0.05
µ F
470
µ F
Volume
1N5305
1.0
µ F
T
I
360 k
330
56 k 10 k 25 k
38 V
+
10 k Ω
10 k
Calibrate
R
x
V
out
V
Range