Page 1
1.225V micropower shunt voltage reference
Features
■ 1.225V typical output voltage
■ Ultra low operating current: 65µA maximum at
25°C
■ High precision @ 25°C
–+/- 2%
–+/- 1%
– +/- 0. 5%
■ High stability when used with capacitive loads
■ Industrial temperature range: -40°C to +85°C
■ 150ppm/°C maximum temperature coefficient
Application
■ Computers
■ Instrumentation
■ Battery chargers
■ Switch mode power supply
■ Battery operated equipments
TS4041
L
SOT23-3L
(Plastic micropackage)
Pin connections
(Top view)
Description
The TS4041 is a low power shunt voltage
reference providing a stable 1.225V output
voltage over the industrial temperature range
(-40°C to +85°C). Availabe in SOT23-3 surface
mount package, it can be design ed in applications
where space saving is critical.
The low operating current is a key adv antage for
power restricted designs. In addition, the TS4041
is very stable and can be used in a broad ran ge of
application conditions.
August 2007 Rev 2 1/9
www.st.com
9
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Absolute maximum ratings and operating conditions TS4041
1 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings (AMR)
Symbol Parameter Value Unit
I
I
P
T
stg
ESD
T
lead
1. Pd is calculated with T
2. Human body model: 100pF discharged through a 1.5kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
3. Machine model: a 200pF cap is charged to the specified voltage, then discharged directly between two pins
of the device with no external series resistor (internal resistor < 5Ω), done for all couples of pin
combinations with other pins floating.
Table 2. Operating conditions
Reverse breakdown current 20 mA
k
Forward cur rent 10 mA
f
Power dissipation
d
(1)
SOT23-3
360 mW
Storage temperature -65 to +150 °C
(3)
(2)
2kV
200 V
Human body model (HBM)
Machine model (MM)
Lead temperature (soldering, 10 seconds) 260 °C
= 25°C and Tj = 150°C and R
amb
= 340°C/W for the SOT23-3L package.
thja
Symbol Parameter Value Unit
I
I
T
min
max
oper
Minimum operating current 65 μA
Maximum operating current 12 mA
Operating free air temperature range -40 to +85 °C
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Page 3
TS4041 Electrical characteristics
2 Electrical characteristics
Table 3. TS4041E (2% precision) T
amb
= 25°C
(1)
(unless otherwise specified)
Symbol Parameter Test cond iti on s Min. Typ. Max. Unit
Reverse breakdown voltage Ik = 100μA
V
k
Reverse breakdown voltage tolerance
I
k-min
ΔV
ΔVk/ΔI
R
Minimum operating current
/ΔT Average temperature coefficient Ik = 100μA 150 ppm/°C
ref
Reverse breakdown voltage change
k
with operating current range
Static impedance ΔIk = 45µA to 1mA 0.25 0.5 Ω
ka
K
Long term stability Ik = 100μA, t = 1000hrs 120 ppm
vh
En Wide band noise I
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
Table 4. TS4041D (1% precision) T
amb
= 100μA
I
k
-40°C < T
T
amb
-40°C < T
I
k-min
-40°C < T
1mA < I
-40°C < T
= 100μA, 10Hz < f < 10kHz 200 nV/√Hz
k
= 25°C
< +85°C
amb
= 25°C 40 65
< +85°C 70
amb
< Ik < 1mA
< +85°C
amb
< 12mA
k
< +85°C
amb
(1)
(unless otherwise specified)
1.2001.2251.25
0
-25
-36
+25
+36
0.3 2
2.5
2.5 8
10
mV
μA
mV
Symbol Parameter Test cond iti on s Min. Typ. Max. Unit
V
Reverse breakdown voltage Ik = 100μA
V
k
Reverse breakdown voltage tolerance
Minimum operating current
/ΔT Average temperature coefficient Ik = 100μA 150 ppm/°C
ref
Reverse breakdown voltage change
/ΔI
k
k
with operating current range
Static impedance ΔIk = 45μA to 1mA 0.25 0.5 Ω
ka
Long term stability Ik = 100μA, t = 1000hrs 120 ppm
K
vh
ΔV
ΔV
I
k-min
R
En Wide band noise I
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
Ik = 100μA
-40°C < T
T
= 25°C 40 65
amb
-40°C < T
I
< Ik < 1mA
k-min
-40°C < T
1mA < I
-40°C < T
= 100μA, 10Hz < f < 10kHz 200 nV/√Hz
k
< +85°C
amb
< +85°C 70
amb
< +85°C
amb
< 12mA
k
< +85°C
amb
1.2131.2251.23
7
-12
-25
+12
+25
0.3 2
2.5
2.5 8
10
mV
μA
mV
V
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Page 4
Electrical characteristics TS4041
Table 5. TS4041C (0.5% precision)
(1)
T
= 25°C (unless otherwise specified)
amb
Symbol Parameter Test cond iti on s Min. Typ. Max. Unit
Reverse breakdown voltage Ik = 100μA
V
k
Reverse breakdown voltage tolerance
I
k-min
ΔV
ΔVk/ΔI
R
Minimum operating current
/ΔT Average temperature coefficient Ik = 100μA 120 ppm/°C
ref
Reverse breakdown voltage change
k
with operating current range
Static impedance ΔIk = 45μA to 1mA 0.25 0.5 Ω
ka
K
Long term stability Ik = 100μA, t = 1000hrs 120 ppm
vh
En Wide band noise I
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
= 100μA
I
k
-40°C < T
T
= 25°C 40 60
amb
-40°C < T
< Ik < 1mA
I
k-min
-40°C < T
1mA < I
-40°C < T
= 100μA, 10Hz < f < 10kHz 200 nV/√Hz
k
< +85°C
amb
< +85°C 65
amb
< +85°C
amb
< 12mA
k
< +85°C
amb
1.2191.2251.23
1
-6
-16
+6
+16
0.3 1.5
2
2.5 6
8
mV
μA
mV
V
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Page 5
TS4041 Electrical characteristics
12
current
Figure 2. Reference voltage versus cathode
current
100
Figure 1. Reference voltage versus cathode
8
4
50
0
0
-4
Cathode current (mA)
Cathode current (µA)
-8
-50
-0.5
-1
-0.5
00.51
1.5
-1
Reference voltage (V)
0
0.5
Reference voltage (V)
1
Figure 3. Test circuit Figure 4. Reference voltage versus
temperature
1.26
R
Ik=(Vin-Vref)/R
Vout=Vref
1.25
1.24
1.23
1.22
1.5
+2%
+1%
+0.5%
Figure 5. Static impedance versus
temperature
0.25
0.24
0.23
0.22
0.21
Static impedance (Ohms)
0.2
-40 -20 0 20 40 60 80
Temperature (°C)
1.21
Cathode voltage (V)
1.2
1.19
-40 -20 0 20 40 60 80
Temperature (°C)
Figure 6. Noise voltage versus frequency
800
600
400
200
Noise voltage (nV/Hz)
0
0 1 10 100 1,000 10,000
CL=10µF
CL=100µF
CL=0µF
Frequency (kHz)
-0.5%
-1%
-2%
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Page 6
Package information TS4041
Figure 7. Pulse response for I
3V
0V
1.225V
0V
0246810
Time (µs)
=100µA Figure 8. Test circuit for pulse response at
k
Input
Output
Pulse
Generator
I
=100µA
k
Intput
18 K
Ω
Ik=100µA
Figure 9. Pulse response for Ik=1mA Figure 10. Test circuit for pulse response at
I
=1mA
k
3V
Input
Output
0V
Pulse
Generator
1.225V
0V
1.8 K
Ω
Intput
Ik=1mA
Output
Output
0246810
Time (µs)
3 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
6/9
®
packages. These packages have a lead-free second level interconnect. The
.
Page 7
TS4041 Package information
Figure 11. SOT23-3 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°
7110469/A
7/9
Page 8
Ordering information TS4041
4 Ordering information
Table 6. Order codes
Part number Precision
TS4041EILT-1.2 2%
TS4041DILT-1.2 1% L232
TS4041CILT-1.2 0.5% L231
5 Revision history
Table 7. Document revision history
Date Revision Changes
21-Mar-2002 1 Initial release.
20-Aug-2007 2
Temperature
range
-40°C to +85°C SOT23-3 Tape & reel
Removed TO-92 package information.
Format update.
Package Packing Marking
L233
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TS4041
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