TL431, A, B Series
Figure 8. Change in Reference Input
Voltage versus Cathode Voltage
∆
Vref , REFERENCE INPUT VOLTAGE (mV)
IK = 10 mA
TA = 25°C
–8.0
Ioff , OFF–STATE CATHODE CURRENT (nA)
0
1.0 k
100
10
1.0
0.1
0.01
–55
VKA = 36 V
Vref = 0 V
VKA
Ioff
Figure 9. Off–State Cathode Current
versus Ambient Temperature
–16
Input
R1
IK
Vref
VKA
Input
–24
R2
–32
0
10
20
30
40
–25
0
25
50
75
100
125
VKA, CATHODE VOLTAGE (V)
TA, AMBIENT TEMPERATURE (5C)
Figure 10. Dynamic Impedance
versus Frequency
100
|ZKA|, DYNAMIC IMPEDANCE (
Ω
)
1.0 k
50
10
–
+
Output
IK
Gnd
|ZKA|, DYNAMIC IMPEDANCE (
Ω
)
TA = 25
_
C
∆
IK = 1.0 mA to 100 mA
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
Output
1.0 k
IK
50
–
+
Gnd
1.0
0.1
1.0 k
10 k
100 k
f, FREQUENCY (MHz)
1.0 M
10 M
–25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (
_
C)
Figure 12. Open–Loop Voltage Gain
versus Frequency
A VOL, OPEN LOOP VOLTAGE GAIN (dB)
60
50
40
30
20
10
0
–10
1.0 k
10 k
100 k
f, FREQUENCY (MHz)
1.0 M
10 M
0
10
IK = 10 mA
TA = 25
_
C
9.0
µF
15 k
8.25 k
Gnd
IK
Output
NOISE VOLTAGE (nV/
√
Hz)
230
60
80
Figure 13. Spectral Noise Density
40
Input
20
VKA = Vref
IK = 10 mA
TA = 25°C
IK
Output
100
1.0 k
f, FREQUENCY (Hz)
10 k
100 k
6
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA, INC ]
