Technical Data Sheet

TS3431
1.24 V programmable shunt voltage reference
Datasheet − production data
Features
■
Adjustable output voltage: 1.24 to 24 V
■
Several precision levels @ 25°C ± 2%, ± 1%,
± 0.5% and ± 0.25%
■
Sink current capability: 0.4 to 100 mA
■
Industrial temperature range: - 40°C to +125°C
■
Performance compatible with industry
standard TL431
L
SOT23-3L
(Plastic micropackage)
Applications
Computers
■
Instrumentation
■
Battery chargers
■
Switch mode power supply
■
Battery operated equipment
Reference
1
TS3431
■
Cathode
3
Anode
2
Description
The TS3431 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire operating temperature range (- 40
°C to + 125 °C). The output voltage can be set to
any value between 1.24 V and 24 V with an
external resistor bridge.
SOT23-3
(top view)
Available in SOT23-3 surface mount package, it
can be used in application designs where space
saving is critical.
August 2012
This is information on a product in full production.
Doc ID 10174 Rev 4
1/13
www.st.com
13
Contents
TS3431
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2/13
Doc ID 10174 Rev 4
TS3431
1
Block diagram
Block diagram
Figure 1.
Block diagram
Cathode
Reference
+
-
VREF
Anode
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Absolute maximum ratings
2
TS3431
Absolute maximum ratings
Table 1.
Absolute maximum ratings (AMR)
Symbol
VKA
IK
IREF
Parameter
Value
Unit
25
V
-100 to +150
mA
-0.05 to10
mA
360
mW
-65 to +150
°C
2
kV
Machine model (MM)
200
V
Lead temperature (soldering, 10 seconds)
250
°C
Value
Unit
Cathode to anode voltage
Reverse breakdown current
Reference current
Pd
Power dissipation (1) SOT23-3L
Tstg
Storage temperature
Human body model (HBM)
ESD
Tlead
1. Pd is calculated with Tamb = 25°C, Tj = 150°C, Rthjc = 110°C/W, Rthja = 340°C/W.
Table 2.
Symbol
Parameter
IK
Cathode operating current
0.5 to 100
mA
VK
Cathode operating voltage
1.24 to 24
V
-40 to +125
°C
Toper
4/13
Operating conditions
Operating free air temperature range
Doc ID 10174 Rev 4
TS3431
Electrical characteristics
3
Electrical characteristics
Table 3.
Tamb = 25°C (unless otherwise specified) (1)
Symbol
VK
ΔVK
TC
Parameter
Test conditions
Reference input voltage IK = 10 mA,
Vka = Vref
Variation of reference input voltage
over temperature, Vka = Vref
Temperature coefficient
TS3431 (2%)
1.215
TS3431A (1%)
1.228
ΔVref
---------------ΔVka
IREF
ΔIREF
IOFF
Typ.
Max.
1.252
V
TS3431B (0.5%)
1.234
1.246
TS3431C (0.25%)
1.237
1.243
0°C < T < +70°C
10
-40°C < T < +105°C
18
-40°C < T < +125°C
21
-40°C < T < +125°C
100
0.35
mV
ppm/°C
0.4
Minimum operating current
mA
-40°C < T < +125°C
IK=10mA
Ratio of change in reference input
voltage to change in cathode to anode VK= 24 to 1.24V
voltage
-40°C < T < +125°C
0.5
1.2
1.5
mV/V
2
Reference input current
IK=10mA, R1=10KΩ, R2=+ ∞
T= 25°C
Reference input current deviation
IK=10mA, R1=10KΩ, R2=+
0°C < T < +70°C
0.5
1
-40°C < T < +125°C
0.9
1.5
T= 25°C
35
500
Off-state cathode current VK=24V
Unit
1.265
1.24
T = 25°C
IKmin
Min.
0.9
1.5
µA
-40°C < T < +125°C
2
µA
-40°C < T < +105°C
1000
-40°C < T < +125°C
2000
RKA
Reverse static impedance
IK = 1 to 100mA
0.2
EN
Wideband noise
IK = 10mA
1kHz < f < 100kHz
100
0.4
nA
W
nV/√ Hz
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
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Electrical characteristics
Figure 2.
TS3431
Reference voltage vs. temperature
Figure 3.
Test circuit for VK = Vref
Voltage Reference (V)
1.250
Input
Output
1.245
Ik
IK = 10mA
VK = VREF
1.240
Vka
1.235
Vref
1.230
-40
0
40
80
120
Temperature (°C)
Figure 4.
Cathode voltage vs. cathode
current
Figure 5.
IKMIN (mA)
T=-40°C
Minimum operating current
Cathode voltage VK (V)
1.5
1.0
0.5
0.0
0.0
T=+25°C
0.1
T=+125°C
0.2
0.3
0.5
0.4
0.3
VK = VREF
0.2
0.1
0.0
-40
0.4
Minimum operating current vs.
temperature
0
40
Cathode current IK (mA)
Figure 6.
Reference input current vs.
temperature
Figure 7.
Dynamic impedance ZKA (Ω)
Reference current IREF (µA)
120
Dynamic impedance vs frequency
0.5
1.00
0.75
0.50
0.25
VK = VREF
T=+25°C
0.4
0.3
0.2
0.1
0.00
-40
0
40
80
120
0.0
10
Temperature (°C)
6/13
80
Temperature (°C)
100
1000
Frequency (Hz)
Doc ID 10174 Rev 4
10000
TS3431
Electrical characteristics
Figure 8.
Off-state current vs temperature
Figure 9.
Test circuit for off-state current
measurement
OFF State Current IOFF (nA)
300
Vka=24V
Ioff
200
100
0
-40
0
40
80
120
Temperature (°C)
Figure 10. Ratio of change in reference input
voltage to change in VKA voltage
vs. temperature
2.0
Figure 11. Test circuit for VK > VREF
Input
Vka
ΔVREF / ΔVK
(mV/V)
Ik
1.5
R1
Iref
1.0
ΔVK = 1.24 to 24V
IK = 10 mA
0.5
0.0
-40
0
40
80
R2
Vref
120
Vka = Vref . (1+R1/R2) + Iref . R1
Temperature (°C)
Figure 12. Pulse response at IK=1mA
Figure 13. Test circuit for pulse response at
IK = 1mA
5.0
T=+25°C
Input Voltage
...
2.7K Ω
Output voltage
0
Output
4V
2.5
Intput
Voltage (V)
IK=1mA
...
0.0
0
2
4
6
8
Time (µs)
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Electrical characteristics
TS3431
Figure 14. Pulse response at IK = 10mA
Figure 15. Test circuit for pulse response at
IK = 10mA
5.0
Input Voltage
T=+25°C
...
270 Ω
Output voltage
Output
4V
2.5
Intput
Voltage (V)
IK=10mA
0
...
0.0
0
2
4
6
8
Time (µs)
Figure 16. Phase and gain vs frequency
Figure 17. Equivalent input noise vs.
frequency
Phase (°)
80
300
VK = VREF
IK = 10 mA
T = +25°C
Noise (nV / √ Hz)
40
0
40
Gain (dB)
T = +25°C
200
100
20
0
1000
10000
100000
1000000
0
0.1
Figure 18. Test circuit for phase and gain
measurement
Output
4.3 K Ω
Intput
8/13
IK=10mA
6.8 K Ω
10 µF
10 µF
1
10
100
Frequency (kHz)
Frequency (Hz)
Doc ID 10174 Rev 4
1000
10000
TS3431
4
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Doc ID 10174 Rev 4
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Package mechanical data
Table 4.
TS3431
SOT23-3L package mechanical data
Dimensions
Ref.
Millimeters
Min.
Typ.
Mils
Max.
Min.
Typ.
A
0.890
1.120
35.05
44.12
A1
0.010
0.100
0.39
3.94
A2
0.880
1.020
34.65
b
0.300
0.500
11.81
19.69
C
0.080
0.200
3.15
7.88
D
2.800
3.040
110.26
E
2.100
2.64
82.70
E1
1.200
1.400
47.26
0.950
2.900
1.300
37.41
114.17
51.19
0.950
37.41
e1
1.900
74.82
0.400
L1
k
0.600
15.75
0.540
0°
40.17
119.72
103.96
e
L
55.13
23.63
21.27
8°
0°
8°
7110469/A
10/13
Max.
Doc ID 10174 Rev 4
TS3431
5
Ordering information
Ordering information
s
Table 5.
Order codes
Part numbers
TS3431ILT
TS3431AILT
TS3431BILT
TS3431CILT
Temperature
range
-40°C, +125°C
Doc ID 10174 Rev 4
Package
SOT23-3L
Packaging
Marking
Tape & reel
L280
L281
L282
L283
11/13
Revision history
6
TS3431
Revision history
Table 6.
12/13
Document revision history
Date
Revision
Changes
1-Jan-2004
1
Initial release.
1-Dec-2004
2
Specific content changes as follows:
– CI version added in Table 5: Order codes.
– Rthjc information added in Table 1: Absolute maximum ratings
(AMR).
– Test condition added in electrical characteristics Table 3.
26-Jun-2007
3
Removed TO-92 package information and associated order codes.
Re-ordered electrical characteristics figures.
30-Aug-2012
4
Added: Vka = Vref parameter in Table 3 on page 5.
Doc ID 10174 Rev 4
TS3431
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