ST TS4041 User Manual
TS4041
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
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 designed in applications where space saving is critical.
The low operating current is a key advantage for power restricted designs. In addition, the TS4041 is very stable and can be used in a broad range of application conditions.
L
SOT23-3L
(Plastic micropackage)
Pin connections
(Top view)
August 2007 |
Rev 2 |
1/9 |
www.st.com
Absolute maximum ratings and operating conditions |
TS4041 |
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1 Absolute maximum ratings and operating conditions
Table 1. |
Absolute maximum ratings (AMR) |
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Symbol |
Parameter |
Value |
Unit |
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Ik |
Reverse breakdown current |
20 |
mA |
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If |
Forward current |
10 |
mA |
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Pd |
Power dissipation (1) SOT23-3 |
360 |
mW |
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Tstg |
Storage temperature |
-65 to +150 |
°C |
|
ESD |
Human body model (HBM)(2) |
2 |
kV |
|
Machine model (MM)(3) |
200 |
V |
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Tlead |
Lead temperature (soldering, 10 seconds) |
260 |
°C |
1.Pd is calculated with Tamb = 25°C and Tj = 150°C and Rthja = 340°C/W for the SOT23-3L package.
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 |
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Symbol |
Parameter |
Value |
Unit |
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Imin |
Minimum operating current |
65 |
μA |
Imax |
Maximum operating current |
12 |
mA |
Toper |
Operating free air temperature range |
-40 to +85 |
°C |
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TS4041 |
Electrical characteristics |
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2 |
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Electrical characteristics |
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Table 3. |
TS4041E (2% precision) T |
= 25°C (1) (unless otherwise specified) |
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amb |
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Symbol |
Parameter |
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Test conditions |
Min. |
Typ. |
Max. |
Unit |
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Reverse breakdown voltage |
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Ik = 100μA |
1.20 |
1.22 |
1.25 |
V |
Vk |
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0 |
5 |
0 |
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Reverse breakdown voltage tolerance |
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Ik = 100μA |
-25 |
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+25 |
mV |
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-40°C < Tamb < +85°C |
-36 |
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+36 |
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Ik-min |
Minimum operating current |
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Tamb = 25°C |
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40 |
65 |
μA |
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-40°C < Tamb < +85°C |
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70 |
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Vref/ |
T |
Average temperature coefficient |
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Ik = 100μA |
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150 |
ppm/°C |
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Ik-min < Ik < 1mA |
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0.3 |
2 |
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Vk/ |
Ik |
Reverse breakdown voltage change |
|
-40°C < Tamb < +85°C |
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2.5 |
mV |
with operating current range |
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1mA < Ik < 12mA |
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2.5 |
8 |
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-40°C < Tamb < +85°C |
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10 |
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Rka |
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Static impedance |
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Ik = 45µA to 1mA |
|
0.25 |
0.5 |
Ω |
Kvh |
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Long term stability |
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Ik = 100μA, t = 1000hrs |
|
120 |
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ppm |
En |
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Wide band noise |
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Ik = 100μA, 10Hz < f < 10kHz |
|
200 |
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nV/√Hz |
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) Tamb = 25°C (1) (unless otherwise specified)
Symbol |
Parameter |
Test conditions |
Min. |
Typ. |
Max. |
Unit |
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Reverse breakdown voltage |
Ik = 100μA |
1.21 |
1.22 |
1.23 |
V |
Vk |
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3 |
5 |
7 |
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Reverse breakdown voltage tolerance |
Ik = 100μA |
-12 |
|
+12 |
mV |
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-40°C < Tamb < +85°C |
-25 |
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+25 |
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Ik-min |
Minimum operating current |
Tamb = 25°C |
|
40 |
65 |
μA |
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-40°C < Tamb < +85°C |
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70 |
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Vref/ |
T |
Average temperature coefficient |
Ik = 100μA |
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|
150 |
ppm/°C |
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Ik-min < Ik < 1mA |
|
0.3 |
2 |
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Vk/ |
Ik |
Reverse breakdown voltage change |
-40°C < Tamb < +85°C |
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|
2.5 |
mV |
with operating current range |
1mA < Ik < 12mA |
|
2.5 |
8 |
|||
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-40°C < Tamb < +85°C |
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10 |
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Rka |
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Static impedance |
Ik = 45μA to 1mA |
|
0.25 |
0.5 |
Ω |
Kvh |
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Long term stability |
Ik = 100μA, t = 1000hrs |
|
120 |
|
ppm |
En |
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Wide band noise |
Ik = 100μA, 10Hz < f < 10kHz |
|
200 |
|
nV/√Hz |
1.Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and by design.
3/9
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