Datasheet

TL431, A, B Series
6
MOTOROLA ANALOG IC DEVICE DATA
√
NOISE VOLTAGE (nV/ Hz)
–55
f, FREQUENCY (MHz)
100
10
1.0
100 k 10 M1.0 M1.0 k 10 k
0.1
75–25 0 25 50 100 125
T
A
, AMBIENT TEMPERATURE (
C)
0.200
0.220
0.240
0.300
0.320
0.260
0.280
I
K
50
–
1.0 k
+
Output
Gnd
Output
Gnd
I
K
50
–
1.0 k
+
V
KA
= V
ref
∆ I
K
= 1.0 mA to 100 mA
f
≤ 1.0 kHz
T
A
= 25 C
∆ I
K
= 1.0 mA to 100 mA
|Z
KA
Ω
|, DYNAMIC IMPEDANCE ( )
|Z
KA
Ω
|, DYNAMIC IMPEDANCE ( )
f, FREQUENCY (Hz)
40
10 10 k1.0 k100
0
20
100 k
60
f, FREQUENCY (MHz)
100 k
0
10 M1.0 M
–10
10
20
30
60
50
40
1.0 k 10 k
V
KA
= V
ref
I
K
= 10 mA
T
A
= 25 ° C
I
K
Output
Input
80
, OPEN LOOP VOLTAGE GAIN (dB)
230
Gnd
Output
I
K
9.0
µ F
8.25 k
15 k
I
K
= 10 mA
T
A
= 25
C
–55
0.01
100
10
1.0
0.1
T
A
, AMBIENT TEMPERATURE (5C)
75–25 0 25 50 100 125
40
1.0 k
V
KA
, CATHODE VOLTAGE (V)
30100
–32
–8.0
–16
20
0
–24
R2
V
ref
R1
I
K
Input V
KA
Input
I
off
V
KA
= 36 V
V
ref
= 0 V
V
KA
V
ref
, REFERENCE INPUT VOLTAGE (mV)
∆
I
off
, OFF–STATE CATHODE CURRENT (nA)
I
K
= 10 mA
T
A
= 25
° C
Figure 8. Change in Reference Input
Voltage versus Cathode Voltage
Figure 9. Off–State Cathode Current
versus Ambient Temperature
Figure 10. Dynamic Impedance
versus Frequency
Figure 11. Dynamic Impedance
versus Ambient Temperature
Figure 12. Open–Loop Voltage Gain
versus Frequency
Figure 13. Spectral Noise Density
VOL
A