TS432
1.24 V adjustable shunt voltage reference
Features
1.24 V typical output voltage Ultra low operating current: 60 A maximum at 25 C High precision at 25 C: +/- 1% +/- 0.5% L SOT23-3L (Plastic micropackage)
High stability when used with capacitive loads Industrial temperature range: -40 C to +85 C 100 ppm/C temperature coefficient Pin connections (top view)
Applications
Computers Instrumentation Battery chargers Switch mode power supply Battery operated equipments
K Cathode Ref Reference
SOT23-3
A Anode
Description
The TS432 is an adjustable low power shunt voltage reference providing an output voltage from 1.24 V to 10 V over the industrial temperature range (-40 C to +85 C). Available in SOT23-3 surface mount package, it can be designed in applications where space saving is critical. The low operating current is also a key advantage for power restricted designs. In addition, the TS432 is very stable and can be used in a broad range of application conditions.
April 2008
Rev 2
1/11
www.st.com 11
Absolute maximum ratings and operating conditions
TS432
1
Absolute maximum ratings and operating conditions
Table 1.
Symbol VK IK Iref Pd Rthja Tlead Tstg Tj ESD MM: machine model
1. Pd is calculated with Tamb = 25 C, Tj = 150 C and Rthja = 360 C/W.
Absolute maximum ratings (AMR)
Parameter Cathode voltage Cathode current Reference input current Power dissipation (1) SOT23-3 Thermal resistance junction to ambient for SOT23-3 Lead temperature (soldering 10 seconds) Storage temperature Junction temperature HBM: human body model Value 12 -10 to +20 -0.05 to +3 340 360 250 -65 to +150 150 1.5 150 Unit V mA mA mW C/W C C C kV V
Table 2.
Symbol VK IK Tamb
Operating conditions
Parameter Cathode voltage Cathode current Ambient temperature Value 1.24 to 10 60 to 12m -40 to +85 Unit V A C
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TS432
Electrical characteristics
2
Table 3.
Symbol
Electrical characteristics
Tamb = 25C (unless otherwise specified)
Parameter Test conditions IK = 100A, VK=VREF Vref Reference voltage TS432 (1%) TS432A (0.5%) Vref IKmin Reference voltage tolerance over temperature Minimum operating current IK = 100A, VK=VREF Tamb = 25C -40C < Tamb < +85C IKmin < IK < 1mA Vref Reverse breakdown voltage change with -40C < Tamb < +85C operating current range 1mA < IK < 12mA -40C < Tamb < +85C 0.7 1.228 1.234 7 40 Min. Typ. 1.24 1.252 1.246 16 60 65 1.5 2 mV 2 4 6 1.8 2.5 mV/V 3 50 100 nA 200 1 100 nA 150 0.25 120 200 0.5 W ppm nV/ Hz mV A V Max. Unit
Vref/VK
Reference voltage change with output voltage change
IK = 10mA, VK=10V to VREF -40C < Tamb < +85C IK=10mA, R1=10K, R2=+ -40C < Tamb < +85C
Iref
Reference input current
IOFF RKA KVH EN
Off-state cathode current Static impedance Long term stability Wide band noise
VREF=0, VK=10V -40C < Tamb < +85C IK = 100A to 12mA IK = 100A, t = 1000hrs IK = 100A 100Hz < F < 10kHz
Note:
Limits are 100% production tested at 25 C. Behavior over the temperature range is guaranteed through correlation and by design.
3/11
Electrical characteristics
TS432
Figure 1.
1.252 1.248 1.244 1.240
Reference voltage vs temperature
Figure 2.
Test circuit for VK = Vref
Reference Voltage (V)
Input
VK = VREF IK = 100A
Output Ik
VK
1.236 1.232 1.228 -40
VREF
0
40
Temperature (C)
80
120
Figure 3.
10
IK Cathode current (mA)
Cathode voltage vs cathode current Figure 4.
1.5
VK Cathode voltage (V)
Cathode voltage vs cathode current
5
VK = VREF TAMB = +25C
TAMB=-40C 1.0 TAMB=+25C TAMB=+85C 0.5 TAMB=+125C
0
-5
-10 -1.0
-0.5
0.0
0.5
1.0
1.5
0.0
0
20
40
60
VK Cathode voltage (V)
IK Cathode current (A)
Figure 5.
100
Reference input current vs temperature
Figure 6.
0.4
Static impedance vs temperature
80
IK = 10 mA R1 = 10 K R2 = +
RKA Static impedance (Ohms)
IREF Reference current (nA)
0.3
VK = VREF IK = 100 A to 12 mA
60
0.2
40
0.1
20
0 -40
0
40
Tem perature (C)
80
120
0.0 -40
0
40
Tem perature (C)
80
120
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TS432
Electrical characteristics
Figure 7.
150
IOFF Off-State current (nA)
Off-state current vs temperature
Figure 8.
Test circuit for off-state current measurement
Input
100 VREF = 0 V VK = 10 V
VK =10V IOFF
50
0 -40
0
40
Tem perature (C)
80
120
Figure 9.
Ratio of change in reference input voltage to change in VK voltage vs temperature
Figure 10. Test circuit for VKA > VREF
Ratio of change in Reference input voltage (mV/V)
3
Input
VK
IK
2 IK = 10 mA VK = 10V to VREF
R1 IREF
1
R2
VR E F
0 -40
0
40
Tem perature (C)
80
120
VK = VREF . (1+R1/R2) + IREF . R1
Figure 11. Phase and gain vs frequency
60 Gain TAMB = +25C 180
Figure 12. Test circuit for phase and gain measurement
5V
40
Gain (dB)
120
23.5 k
Phase (Degree)
22 F
Phase 20 60
1 F
33 k Output
0 2 10
10
3
10
4
10
5
10
6
0
Input
33 k
Frequency (Hz)
5/11
Electrical characteristics
TS432
Figure 13. Test circuit for pulse response at IK=100 A
Figure 14. Test circuit for pulse response at IK = 1 mA
3V V
18K IK = 100A
0V
3V
1.8K IK=1mA
Output
Figure 15. Pulse response at IK = 100 A
Figure 16. Pulse response at IK = 1 mA
Input and Output signals (Volt)
Input and Ouput signals (Volt)
3 Input
3
Intput
Input 2 IK = 1 mA TAMB = + 25C
2 Output
1 IK = 100 A TAMB = + 25C 0 0 5
Time (s)
1 Output 0
10
15
0
5
10
Time (s)
15
20
Figure 17. Pulse response at IK = 100 A
Input and Output signals (Volt)
Figure 18. Pulse response at IK = 1 mA
Input and Output signals (Volt)
3 Input 2
3 Input 2
IK = 1 mA TAMB = + 25C
1 Output
IK = 100 A TAMB = + 25C
1 Output 0 -5
0
0
5
10
Time (s)
15
20
0
5
10
Time (s)
15
20
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Output
Pulse Generator f=10KHz
Intput
Pulse Generator f=10KHz
TS432 Figure 19. Equivalent input noise vs frequency
300 TAMB = + 25C
Electrical characteristics Figure 20. Block diagram
Cathode
Noise (nV/Hz)
200
Vref
+ -
100
1.24V
0 2 10
10
3
10
4
10
5
10
6
10
7
Anode
Frequency (Hz)
7/11
Package information
TS432
3
Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com.
8/11
TS432 Figure 21. SOT23-3 package mechanical drawing
Package information
7110469/A
Table 4.
SOT23-3 package mechanical data
Dimensions
Ref. Min. A A1 A2 b C D E E1 e e1 L L1 k 0 0.400 0.890 0.010 0.880 0.300 0.080 2.800 2.100 1.200
Millimeters Typ. Max. 1.120 0.100 0.950 1.020 0.500 0.200 2.900 3.040 2.64 1.300 0.950 1.900 0.600 0.540 8 0 15.75 1.400 Min. 35.05 0.39 34.65 11.81 3.15 110.26 82.70 47.26
Mils Typ. Max. 44.12 3.94 37.41 40.17 19.69 7.88 114.17 119.72 103.96 51.19 37.41 74.82 23.63 21.27 8 55.13
9/11
Ordering information
TS432
4
Ordering information
Table 5.
Precision 1% 0.5%
Order codes
Order code TS432ILT TS432AILT Temperature range -40 C to +85 C Package Packing Marking L235 SOT23-3 Tape & reel L236
5
Revision history
Table 6.
Date 16-Dec-2002 7-Apr-2008
Document revision history
Revision 1 2 Initial release. Corrected package mechanical data. Updated document format. Changes
10/11
TS432
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