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TS821AILT

P1-P3P4-P6P7-P9
July 2007 Rev 2 1/9
9
TS821
1.225V micropower shunt voltage reference
Features
■ 1.225V typical output voltage
■ Ultra low operating current: 45μA maximum at
25°C
■ High precision @ 25°C
– +/- 2% (standard version)
– +/- 1% (A grade)
– +/- 0.5% (B grade)
■ High stability when used with capacitive loads
■ Industrial temperature range: -40°C to +85°C
■ 120ppm/°C maximum temperature coefficient
Applications
■ Computers
■ Instrumentation
■ Battery chargers
■ Switch mode power supply
■ Battery operated equipment
Description
The TS821 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 TS821 is
very stable and can be used in a broad range of
application conditions.
L
SOT23-3L
(Plastic micropackage)
Pin connections
(Top view)
www.st.com
Absolute maximum ratings and operating conditions TS821
2/9
1 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings (AMR)
Symbol Parameter Value Unit
I
k
Reverse breakdown current 20 mA
I
f
Forward current 10 mA
P
d
Power dissipation
(1)
SOT23-3
1. P
d
is calculated with T
amb
= 25°C and T
j
= 150°C and R
thja
= 340°C/W for the SOT23-3L package.
360 mW
T
stg
Storage temperature -65 to +150 °C
ESD
Human body model (HBM)
(2)
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.
2kV
Machine model (MM)
(3)
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.
200 V
T
lead
Lead temperature (soldering, 10 seconds) 260 °C
Table 2. Operating conditions
Symbol Parameter Value Unit
I
min
Minimum operating current 45 μA
I
max
Maximum operating current 12 mA
T
oper
Operating free air temperature range -40 to +85 °C
TS821 Electrical characteristics
3/9
2 Electrical characteristics
Table 3. TS821 (2% precision) T
amb
= 25°C
(1)
(unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
k
Reverse breakdown voltage I
k
= 100μA 1.200 1.225 1.250 V
Reverse breakdown voltage
tolerance
I
k
= 100μA
-40°C < T
amb
< +85°C
-25
+34
+25
+34
mV
I
k-min
Minimum operating current
T
amb
= 25°C 40 45
μA
-40°C < T
amb
< +85°C 50
ΔV
ref
/ΔT Average temperature coefficient I
k
= 100μA 120 ppm/°C
ΔV
k
/ΔI
k
Reverse breakdown voltage change
with operating current range
I
k-min
< I
k
< 1mA
-40°C < T
amb
< +85°C
0.3 0.7
1
mV
1mA < I
k
< 12mA
-40°C < T
amb
< +85°C
2.5 8
10
R
ka
Static impedance ΔI
k
= 45µA to 1mA 0.25 0.5 Ω
K
vh
Long term stability I
k
= 100μA, t = 1000hrs 120 ppm
En Wide band noise I
k
= 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.
Table 4. TS821A (1% precision) T
amb
= 25°C
(1)
(unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
k
Reverse breakdown voltage I
k
= 100μA 1.213 1.225 1.237 V
Reverse breakdown voltage
tolerance
I
k
= 100μA
-40°C < T
amb
< +85°C
-12
-22
+12
+22
mV
I
k-min
Minimum operating current
T
amb
= 25°C 40 45
μA
-40°C < T
amb
< +85°C 50
ΔV
ref
/ΔT Average temperature coefficient I
k
= 100μA 120 ppm/°C
ΔV
k
/ΔI
k
Reverse breakdown voltage change
with operating current range
I
k-min
< I
k
< 1mA
-40°C < T
amb
< +85°C
0.3 0.7
1
mV
1mA < I
k
< 12mA
-40°C < T
amb
< +85°C
2.5 5
7
R
ka
Static impedance ΔI
k
= 45μA to 1mA 0.25 0.5 Ω
K
vh
Long term stability I
k
= 100μA, t = 1000hrs 120 ppm
En Wide band noise I
k
= 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.
P1-P3P4-P6P7-P9

TS821AILT

Mfr. #:
Buy TS821AILT
Manufacturer:
STMicroelectronics
Description:
Voltage References 1.225V Micropower 1%
Lifecycle:
New from this manufacturer.
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