2.5V micropower shunt voltage reference
Features
■ 2.50V typical output voltage
■ Ultra low current consumption: 40µA typ.
■ High precision @ 25°C
– ±2% (standard version)
– ±1% (A grade)
■ High stability when used with capacitive loads
■ Industrial temperature range: -40°C to +85°C
■ 100ppm/°C maximum temperature coefficient
Applications
■ Computers
■ Instrumentation
■ Battery chargers
■ Switch mode power supply
■ Battery operated equipment
TS822
L
SOT23-3L
(Plastic micropackage)
Pin connections
(Top view)
Description
The TS822 is a low power shunt v oltage referen ce
providing a stable 2.5V 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 adv antage for
power restricted designs. In addition, the TS822 is
very stable and can be used in a broad range of
application conditions.
August 2007 Rev 2 1/9
www.st.com
9
Absolute maximum ratings and operating conditions TS822
1 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
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 bre akdown current 20 mA
k
Forward curren t 10 mA
f
Pow er 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 R
amb
= 340°C/W for the SOT23-3L package
thja
Symbol Parameter Value Unit
I
k-min
I
k-max
T
oper
Minimum operating current 50 μA
Maximum operating current 15 mA
Operating free air temperature range -40 to +85 °C
2/9
TS822 Electrical characteristics
2 Electrical characteristics
Table 3. TS822 (2% precision) T
amb
= 25°C
(1)
(unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Reverse breakdown voltage Ik = 100μA 2.45 2.5 2.55 V
V
k
Reverse breakdown voltage tolerance
I
= 100μA
k
-40°C < T
amb
< +85°C
-50
-66
50
66
mV
T = 25°C 40 50
I
k-min
ΔV
ref
ΔV
k
R
K
En Wide band noise I
1. Limits are 100% production tested at 25°C. Behavior at temperature range limits is guaranteed by correlation and design.
Table 4. TS822A (1% precision) T
Minimum operating current
-40°C < T
< +85°C 60
amb
/ΔT Average temperature coefficient Ik = 100μA 30 100 ppm/°C
I
< Ik < 1mA
k-min
Reverse breakdown voltage change
/ΔI
k
with operating current range
-40°C < T
1mA < I
-40°C < T
I
= I
k
k-min
-40°C < T
Reverse static impedance
ka
= 1 to 15mA
I
k
-40°C < T
Long term stability Ik = 100μA, t = 1000hrs 120 ppm
vh
= 100μA, 10Hz < f < 10kHz 35 nV/√Hz
k
amb
= 25°C
(1)
(unless otherwise specified)
< +85°C
amb
< 15mA
k
< +85°C
amb
to 1mA
< +85°C
amb
< +85°C
amb
0.4 1
1.2
mV
2.5 8
10
0.4 1
1.2
0.2 0.6
0.7
Symbol Parameter Test conditions Min. Typ. Max. Unit
μA
Ω
Reverse breakdown voltage Ik = 100μA 2.475 2.5 2.525 V
V
k
Reverse breakdown voltage tolerance
= 100μA
I
k
-40°C < T
amb
< +85°C
-25
-41
25
41
mV
T = 25°C 40 50
I
k-min
ΔV
ref
ΔV
k/ΔIk
R
K
En Wide band noise I
1. Limits are 100% production tested at 25°C. Behavior at temperature range limits is guaranteed by correlation and design.
Minimum operating current
-40°C < T
< +85°C 60
amb
/ΔT Average temperature coefficient Ik = 100μA 30 100 ppm/°C
I
< Ik < 1mA
k-min
Reverse breakdown voltage change
with operating current range
-40°C < T
1mA < I
-40°C < T
I
= I
k
k-min
-40°C < T
Reverse static impedance
ka
= 1mA to 15mA
I
k
-40°C < T
Long term stability Ik = 100μA, t = 1000hrs 120 ppm
vh
= 100μA, 10Hz < f < 10kHz 35 nV/√Hz
k
< +85°C
amb
< 15mA
k
< +85°C
amb
to 1mA
< +85°C
amb
< +85°C
amb
0.4
2.5 8
0.4 1
0.2 0.6
1
1.2
mV
10
1.2
0.7
3/9
μA
Ω
Electrical characteristics TS822
p
)
Figure 1. Reference voltage versus cathode
Figure 2. Minimum operating current
current
Reference voltage versus cathode current
15
10
5
0
Cathode current (mA)
-5
-0.5 0 0.5 1 1.5 2 2.5
Cathode voltage (V)
Cathode voltage (V)
Minimum operating current
3
2.5
2
1.5
1
0.5
0
02040
T=+25°C
T=+85°C
T=-40°C
Cathode current (µA)
Figure 3. Test circuit Figure 4. Reference voltage versus
temperature
Reference voltage versus Temperature
Test circuit
R
Ik=(Vin-Vref)/R
2.56
2.54
2.52
+2%
+1%
Vin
Vout=Vref
Figure 5. Static impedance (Rka) versus
temperature
Static impedance (Rka) versus
0.2
0.15
0.1
0.05
Static impedance (Ohms)
0
-40-200 20406080
temperature
Temperature (°C)
2.5
2.48
Cathode voltage (V)
2.46
2.44
-40 -20 0 20 40 60 80
Tem
-1%
-2%
erature (°C
Figure 6. Noise voltage versus frequency
Noise voltage versus Frequency
1500
CL=100µF
1000
500
Noise voltage (nV/VHz)
0
0.1
CL=10µF
1.0
Frequency (KHz)
10.0
CL=1µF
CL=100nF
CL=0
1000.0
100.0
4/9
TS822 Electrical characteristics
Figure 7. Test circuit for pulse response at
I
=100µA
k
Test circuit for pulse response at Ik=100µA
25k ohm
Ik=100µA
Pulse
Generator
Intput
Figure 9. Pulse response for Ik=100µA
(detailed part)
Pulse response for Ik=100µA
Detailed part
5V
Input
Figure 8. Pulse response for I
Pulse response for Ik=100µA
5
0
2.5
Output
0
0 5 10 15 20
Time (µs)
Figure 10. Pulse response for Ik=100µA
(detailed part)
Pulse response for Ik=100µA
Detailed part
5V
=100µA
k
Input
Output
0V
Output
0V
00.511.52
Time (µs)
2.5V
Figure 11. Test circuit for pulse response at
I
=100mA
k
Test circuit for pulse response at Ik=1mA
2.5k ohm
Ik=1mA
Pulse
Generator
Intput
Input
2.5V
012345
Time (µs)
Figure 12. Pulse response for I
Pulse response for Ik=1mA
5V
0V
2.5V
Output
0V
012345
Output
Input
Output
Time (µs)
=100mA
k
0V
0V
5/9
Package information TS822
Figure 13. Pulse response for I
=100mA
k
(detailed part)
Pulse response for Ik=1mA
Detailed part
5V
Input
0V
Output
0V
0 50 100 150 200
Time (ns)
2.5V
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
®
packages. These packages have a lead-free second level interconnect. The
Figure 14. Pulse response for Ik=100mA
(detailed part)
Pulse response for Ik=1mA
Detailed part
5V
Input
2.5V
Output
0 0.2 0.4 0.6 0.8 1
Time (µs)
0V
0V
.
6/9
TS822 Package information
Figure 15. 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
Ordering information TS822
4 Ordering information
Table 5. Order codes
Part number Precision Temperature range Package Packing Marking
TS822ILT 2%
TS822AILT 1% L222
5 Revision history
Table 6. Document revision history
Date Revision Changes
21-Mar-2002 1 Initial release.
20-Aug-2007 2
-40°C to +85°C SOT23-3 Tape & reel
L223
Removed information related to TO-92 package.
Format update.
8/9
TS822
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