Page 1
Page 2
Block diagram TS3431
1 Block diagram
Figure 1. Block diagram
Cathode
Reference
+
-
VREF
Anode
2 Absolute maximum ratings
Table 1. Absolute maximum ratings (AMR)
Symbol Parameter Value Unit
V
I
T
ESD
T
1. Pd is calculated with T
Table 2. Operating conditions
Cathode to anode voltage 25 V
KA
Reverse b rea kd own current -100 to +150 mA
I
K
Reference current -0.05 to10 mA
REF
Power dissipation
P
d
Storage temperature -65 to +150 °C
stg
(1)
SOT23-3L
Human body model (HBM) 2 kV
Machine model (MM) 200 V
Lead temperature (soldering, 10 seconds) 250 °C
lead
= 25°C, Tj = 150°C, R
amb
= 110°C/W, R
thjc
= 340°C/W.
thja
360 mW
Symbol Parameter Value Unit
I
Cathode operating current 0.5 to 100 mA
K
Cathode operating voltage 1.24 to 24 V
V
K
T
Operating free air temperature range -40 to +125 °C
oper
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Page 3
TS3431 Electrical characteristics
3 Electrical characteristics
Table 3. T
= 25°C (unless otherwise specified)
amb
(1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
TS3431 (2%) 1.215
1.265
TS3431A (1%) 1.228 1.252
V
Reference input voltage IK = 10mA
K
TS3431B (0.5%) 1.234 1.246
1.24
TS3431C (0.25%) 1.237 1.243
0°C < T < +70°C 10
ΔV
Variation of reference input voltage
K
over temperature
-40°C < T < +125°C 21
T
Temperature coefficient -40°C < T < +125°C 100 ppm/°C
C
T = 25°C 0.35 0.4
I
Kmin
ΔVref
--------------- -
ΔVka
I
REF
Minimum operating current
Ratio of change in reference input
voltage to change in cathode to anode
voltage
Reference input current
IK=10mA, R1=10KΩ, R2=+
∞
-40°C < T < +125°C 0.5
=10mA
I
K
VK= 24 to 1.24V
1.2 1.5
-40°C < T < +125°C 2
T= 25°C 0.9 1.5
-40°C < T < +125°C 2
V
mV-40°C < T < +105°C 18
mA
mV/V
µA
ΔI
REF
Reference input current deviation
IK=10mA, R1=10KΩ, R2=+
0°C < T < +70°C 0.5 1
µA
-40°C < T < +125°C 0.9 1.5
T= 25°C 35 500
I
OFF
Off-state cathode current VK=24V
nA-40°C < T < +105°C 1000
-40°C < T < +125°C 2000
R
E
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
Reverse static impedance IK = 1 to 100mA 0.2 0.4 W
KA
I
= 10mA
Wideband noise
N
K
1kHz < f < 100kHz
100 nV/√ Hz
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Page 4
Electrical characteristics TS3431
Figure 2. Reference voltage vs. temperature Figure 3. Test circuit for VK = Vref
1.250
1.245
1.240
Voltage Reference (V)
1.235
IK = 10mA
= V
V
K
1.230
-40 0 40 80 120
Temperature (°C)
REF
Input
Output
Ik
Vka
Vref
Figure 4. Cathode voltage vs cathode current Figure 5. Minimum operating current vs
temperature
1.5
(V)
K
1.0
0.5
Cathode voltage V
T=-40°C
T=+25°C
T=+125°C
(mA)
KMIN
0.5
0.4
0.3
0.2
0.1
VK = V
REF
0.0
0.0 0.1 0.2 0.3 0.4
Cathode current IK (mA)
Figure 6. Reference input current vs
temperature
1.00
(µA)
0.75
REF
0.50
0.25
Reference current I
0.00
-40 0 40 80 120
Temperature (°C)
Minimum operating current I
0.0
-40 0 40 80 120
Temperature (°C)
Figure 7. Dynamic impedance vs frequency
0.5
(Ω)
KA
0.4
0.3
0.2
Dynamic impedance Z
0.1
0.0
10 100 1000 10000
Frequency (Hz)
VK = V
T=+25°C
REF
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Page 5
TS3431 Electrical characteristics
f
Figure 8. Off-state current vs temperature Figure 9. Test circuit for off-state current
measurement
300
Vka=24V
(nA)
OFF
200
100
OFF State Current I
0
-40 0 40 80 120
Temperature (°C)
Figure 10. Ratio of change in reference input
voltage to change in V
voltage vs
KA
Figure 11. Test circuit for V
Iof
K
> V
REF
temperature
2.0
1.5
(mV/V)
K
1.0
/ ΔV
REF
ΔV
0.5
ΔV
= 1.24 to 24V
K
= 10 mA
I
K
Input
R1
R2
Vka
Ik
Iref
Vref
0.0
-40 0 40 80 120
Temperature (°C)
Vka = Vref . (1+R1/R2) + Iref . R1
Figure 12. Pulse response at IK=1mA Figure 13. Test circuit for pulse response at
I
=1mA
K
5.0
Input Voltage
. . .
2.5
Voltage (V)
0.0
02468
Output voltage
. . .
Time (µs)
T=+25°C
2.7K Ω
IK=1mA
4V
0
Intput
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Output
Page 6
Electrical characteristics TS3431
Figure 14. Pulse response at IK = 10mA Figure 15. Test circuit for pulse response at
I
= 10mA
K
5.0
Input Voltage
. . .
T=+25°C
270 Ω
IK=10mA
2.5
Voltage (V)
0.0
02468
Output voltage
. . .
Time (µs)
4V
0
Intput
Figure 16. Phase and gain vs frequency Figure 17. Equivalent in put noise vs
frequency
80
40
Phase (°)
0
40
T = +25°C
20
Gain (dB)
0
1000 10000 100000 1000000
Frequency (Hz)
300
VK = V
IK = 10 mA
T = +25°C
200
Noise (nV / √ Hz)
100
0
0.1 1 10 100 1000 10000
Frequency (kHz)
REF
Output
Figure 18. Test circuit for phase and gain
measurement
10 µF
10 µF
Intput
6.8 K Ω
4.3 K Ω
6/10
IK=10mA
Output
Page 7
TS3431 Package information
4 Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in
ECOPACK
category of second level interconnect is marke d on the pa ckage and on the inner box label,
in compliance with JEDEC Standard JESD97. The maximum ratings related t o soldering
conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics
trademark. ECOPACK specifications are available at: www.st.com
®
packages. These packages have a lead-free second level interconnect. The
.
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Page 8
Package information TS3431
Figure 19. SOT23-3L package mechanical data
Dimensions
Ref.
Millimeters Mils
Min. Typ. Max. Min. Typ. Max.
A 0.890 1.120 35.05 44.12
A1 0.010 0.100 0.39 3.94
A2 0.880 0.950 1.020 34.65 37.41 40.17
b 0.300 0.500 11.81 19.69
C 0.080 0.200 3.15 7.88
D 2.800 2.900 3.040 110.26 114.17 119.72
E 2.100 2.64 82.70 103.96
E1 1.200 1.300 1.400 47.26 51.19 55.13
e 0.950 37.41
e1 1.900 74.82
L 0.400 0.600 15.75 23.63
L1 0.540 21.27
k0°8°0°8°
8/10
7110469/A
Page 9
TS3431 Ordering information
5 Ordering information
s
Table 4. Order codes
Part number
TS3431ILT
TS3431AILT
TS3431BILT
TS3431CILT
6 Revision history
Date Revision Changes
1-Jan-2004 1 Initial release.
1-Dec-2004 2
26-Jun-2007 3
Temperature
range
-40°C, +125°C SOT23-3L Tape & reel
Specific content changes as follows:
– CI version added in Table 4: Order codes.
information added in Table 1: Absolute maximum ratings
–R
thjc
(AMR).
– Test condition added in electrical characteristics Table 3.
Removed TO-92 package information and associated order codes.
Re-ordered electrical characteristics figures.
Package Packaging Marking
L280
L281
L282
L283
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Page 10
TS3431
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