TS432
1.24 V adjustable shunt voltage reference
Features
■
■
■
■
■
■
1.24 V typical output voltage
Ultra low operating current: 60 µA maximum at
25° C
High precision at 25° C:
+/- 1%
+/- 0.5%
High stability when used with capacitive loads
Industrial temperature range: -40° C to +85° C
100 ppm/°C temperature coefficient
Applications
■
■
■
■
■
Computers
Instrumentation
Battery chargers
Switch mode power supply
Battery operated equipments
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.
L
SOT23-3L
(Plastic micropackage)
Pin connections
(top view)
SOT23-3
Ref
Reference
A
Anode
K
Cathode
April 2008 Rev 2 1/11
www.st.com
11
Absolute maximum ratings and operating conditions
1
TS432
Absolute maximum ratings and operating conditions
Table 1.
Symbol
Absolute maximum ratings (AMR)
Parameter
R thja
T lead
T stg
T j
V
K
I
K
I ref
P d
ESD
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
MM: machine model
1.
P d
is calculated with T amb
= 25° C, T j
= 150° C and R thja
= 360° C/W.
Table 2.
Operating conditions
Symbol Parameter
V
K
I
K
T amb
Cathode voltage
Cathode current
Ambient temperature
Value
12
-10 to +20
-0.05 to +3
340
360
250
-65 to +150
150
1.5
150
Value
1.24 to 10
60µ to 12m
-40 to +85
Unit
V mA mA mW
°C/W
°C
°C
°C kV
V
Unit
V
A
°C
2/11
TS432 Electrical characteristics
Table 3.
Symbol
T amb
= 25°C (unless otherwise specified)
Parameter Test conditions Min.
Typ.
Max.
Unit
V ref
Reference voltage
I
K
= 100µA, V
K
=V
REF
TS432 (1%)
TS432A (0.5%)
Δ
V ref
Reference voltage tolerance over temperature
I
K
= 100µA, V
K
=V
REF
I
Δ ref
Δ
V ref
/
Δ
V
K
I
Kmin
I
V
OFF
R
K ref
E
KA
VH
N
Minimum operating current
Reference voltage change with output voltage change
T amb
= 25°C
-40°C < T amb
< +85°C
I
Kmin
< I
K
< 1mA
Reverse breakdown voltage change with operating current range
-40°C < T amb
< +85°C
1mA < I
K
< 12mA
-40°C < T amb
< +85°C
I
K
= 10mA, V
K
=10V to V
REF
Reference input current
Off-state cathode current
Static impedance
-40°C < T amb
< +85°C
I
K
=10mA, R
1
R
2
=+
∞
=10K
Ω,
-40°C < T amb
< +85°C
V
REF
=0, V
K
=10V
-40°C < T amb
< +85°C
Δ
I
K
= 100µA to 12mA
Long term stability
Wide band noise
I
K
= 100µA, t = 1000hrs
I
K
= 100µA
100Hz < F < 10kHz
1.228
1.234
1.24
7
40
0.7
2
1.8
50
200
1.252
1.246
16
100
1
200
100
150
0.25
0.5
120
4
6
2.5
3
60
65
1.5
2
μ
V mV
A mV mV/V nA nA
W ppm nV/
√
Hz
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.
Reference voltage vs temperature Figure 2.
Test circuit for V
K
= V ref
1.252
1.248
Input
1.244
V
K
= V
REF
I
K
= 100µA
Ik
1.240
V
K
1.236
Output
1.232
V
REF
1.228
-40 0 40
Temperature (°C)
80 120
Figure 3.
Cathode voltage vs cathode current Figure 4.
Cathode voltage vs cathode current
1.5
10
5
V
K
= V
REF
T
AMB
= +25°C
1.0
T
AMB
=-40°C
T
AMB
=+25°C
0
T
AMB
=+85°C
0.5
T
AMB
=+125°C
-5
-10
-1.0
-0.5
0.0
0.5
V
K
Cathode voltage (V)
1.0
Figure 5.
Reference input current vs temperature
100
80
I
K
= 10 mA
R
1
R
2
= 10 K
Ω
= +
∞
60
40
20
0
-40 0 40
Temperature (°C)
80 120
1.5
0.0
0 20 40
I
K
Cathode current (µA)
Figure 6.
Static impedance vs temperature
60
0.4
0.3
0.2
0.1
0.0
-40
V
K
= V
REF
I
K
= 100 µA to 12 mA
0 40
Temperature (°C)
80 120
4/11
TS432 Electrical characteristics
Figure 7.
Off-state current vs temperature
150
Figure 8.
Test circuit for off-state current measurement
Input
V
K
=10V
100
V
REF
= 0 V
V
K
= 10 V
I
OFF
50
0
-40 0 40
Temperature (°C)
80 120
Figure 9.
Ratio of change in reference input voltage to change in V
K
voltage vs temperature
Figure 10.
Test circuit for V
KA
> V
REF
3
Input
I
K
2
I
K
= 10 mA
V
K
= 10V to V
REF
R1
I
REF
V
K
1
R2
V
REF
0
-40 0 40
Temperature (°C)
80
Figure 11.
Phase and gain vs frequency
120
V
K
= V
REF
. (1+R1/R2) + I
REF
. R1
Figure 12.
Test circuit for phase and gain measurement
60 180
5V
Gain
T
AMB
= +25°C
40 120
23.5 k
Ω
22 µF
Phase
20 60
33 k
Ω
1 µF
Output
Input
33 k
Ω
0
10
2
10
3
10
4
Frequency (Hz)
10
5
10
6
0
5/11
Electrical characteristics TS432
Figure 13.
Test circuit for pulse response at
I
K
=100 µA
Figure 14.
Test circuit for pulse response at
I
K
= 1 mA
3V
V
Pulse
Generator f=10KHz
18K
Ω
I
K
= 100µA
3V
0V
Pulse
Generator f=10KHz
1.8K
Ω
I
K
=1mA
Figure 15.
Pulse response at I
K
= 100 µA Figure 16.
Pulse response at I
K
= 1 mA
3 3
Input
Input
2 2
I
K
= 1 mA
T
AMB
= + 25°C
Output
1
0
I
K
= 100 µA
T
AMB
= + 25°C
10 15 0 5
Time (µs)
Figure 17.
Pulse response at I
K
= 100 µA
1
0
0
Output
5
Time (µs)
10 15
Figure 18.
Pulse response at I
K
= 1 mA
20
3 3
I
K
= 1 mA
T
AMB
= + 25°C
Input
Input
2 2
1
I
K
= 100 µA
T
AMB
= + 25°C
1
Output
0
0 5
Time (µs)
10 15 20
0
-5 0
Output
5
Time (µs)
10 15 20
6/11
TS432
Figure 19.
Equivalent input noise vs frequency
300
T
AMB
= + 25°C
200
100
Electrical characteristics
Figure 20.
Block diagram
Cathode
Vref
1.24V
+
-
0
10
2
10
3
10
4
10
5
Frequency (Hz)
10
6
10
7
Anode
7/11
Package information TS432
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
E1 e e1
L
L1 k
D
E b
C
A
A1
A2
Table 4.
Ref.
SOT23-3 package mechanical data
Dimensions
Millimeters
Min.
0.890
0.010
0.880
0.300
0.080
2.800
2.100
1.200
Typ.
0.950
2.900
Max.
1.120
0.100
1.020
0.500
0.200
3.040
2.64
1.400
Min.
35.05
0.39
34.65
11.81
3.15
110.26
82.70
47.26
1.300
0.950
1.900
0.400
0.600
15.75
0.540
0° 8° 0°
Mils
Typ.
37.41
114.17
51.19
37.41
74.82
21.27
Max.
44.12
3.94
40.17
19.69
7.88
119.72
103.96
55.13
23.63
8°
9/11
Ordering information TS432
Table 5.
Precision
Order codes
Order code
1%
0.5%
TS432ILT
TS432AILT
Temperature range
-40° C to
+85° C
Package
SOT23-3
Packing
Tape & reel
Marking
L235
L236
Table 6.
Date
16-Dec-2002
7-Apr-2008
Document revision history
Revision
1
2
Changes
Initial release.
Corrected package mechanical data.
Updated document format.
10/11
TS432
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