TL431 Datasheet, PDF (6/16 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

TL431, A, B Series
Figure 8. Change in Reference Input
Voltage versus Cathode Voltage
0
IK = 10 mA
TA = 25°C
–8.0
–16 _Input
R1
–24 _{R2 Vref}
VKA
IK
Figure 9. Off–State Cathode Current
versus Ambient Temperature
1.0 k
100
10
VKA = 36 V
1.0
Input ^{Vref = 0 V} VKA
Ioff
0.1
–320
10
20
30
40
0.01
–55
–25
0
25
50
75 100 125
VKA, CATHODE VOLTAGE (V)
TA, AMBIENT TEMPERATURE (5C)
Figure 10. Dynamic Impedance
versus Frequency
100
1.0 k
Output
50 _–
IK
10
+
Gnd
TA = 25_C
∆ IK = 1.0 mA to 100 mA
1.0
0.1
1.0 k
10 k
100 k
1.0 M
10 M
f, FREQUENCY (MHz)
0.320
0.300
0.280
0.260
0.240
0.220
0.200–55
Figure 11. Dynamic Impedance
versus Ambient Temperature
VKA = Vref
∆ IK = 1.0 mA to 100 mA
f ≤ 1.0 kHz
1.0 k
50 _–
+
Output
IK
Gnd
–25
0
25
50 75 100 125
TA, AMBIENT TEMPERATURE (_C)
Figure 12. Open–Loop Voltage Gain
versus Frequency
60
Output
50
9.0 µF ^{15 k}
IK
230
40
8.25 k
Gnd
30
20
10 ^{IK = 10 mA}
TA = 25_C
0
–10
1.0 k
10 k
100 k
1.0 M
10 M
f, FREQUENCY (MHz)
Figure 13. Spectral Noise Density
80
60
40
VKA = Vref
IK = 10 mA
TA = 25°C
Input
Output
20
IK
010
100
1.0 k
10 k
100 k
f, FREQUENCY (Hz)
6
MOTOROLA ANALOG IC DEVICE DATA