TS821_07 STMICROELECTRONICS [STMicroelectronics], TS821_07 Datasheet

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TS821_07

Manufacturer Part Number
TS821_07
Description
1.225V micropower shunt voltage reference
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
Features
Applications
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.
July 2007
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
Computers
Instrumentation
Battery chargers
Switch mode power supply
Battery operated equipment
1.225V micropower shunt voltage reference
Rev 2
(Plastic micropackage)
Pin connections
SOT23-3L
(Top view)
L
TS821
www.st.com
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TS821_07 Summary of contents

Page 1

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 ...

Page 2

Absolute maximum ratings and operating conditions 1 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol I Reverse breakdown current k I Forward current f P Power dissipation d T Storage temperature stg Human body model ...

Page 3

TS821 2 Electrical characteristics Table 3. TS821 (2% precision) T Symbol Parameter Reverse breakdown voltage V Reverse breakdown voltage k tolerance I Minimum operating current k-min ΔV /ΔT Average temperature coefficient ref Reverse breakdown voltage change ΔV /Δ ...

Page 4

Electrical characteristics Table 5. TS821B (0.5% precision) T Symbol Parameter Reverse breakdown voltage V Reverse breakdown voltage k tolerance I Minimum operating current k-min ΔV /ΔT Average temperature coefficient ref Reverse breakdown voltage change ΔV /Δ with operating ...

Page 5

TS821 Figure 1. Reference voltage versus cathode current -0.5 0 Reference voltage (V) Figure 3. Test circuit R Ik=(Vin-Vref)/R Figure 5. Static impedance versus temperature 0.25 0.24 0.23 0.22 0.21 0.2 -40 -20 ...

Page 6

Package information Figure 7. Pulse response for 1.225V Time (µs) Figure 9. Pulse response for I 3V Input 1.225V Output Time (µs) 3 Package information In order to ...

Page 7

TS821 Figure 11. SOT23-3 package mechanical data Ref Dimensions Millimeters Min. Typ. Max. 0.890 1.120 0.010 0.100 0.880 0.950 1.020 0.300 0.500 0.080 0.200 2.800 2.900 3.040 ...

Page 8

Ordering information 4 Ordering information Table 6. Order codes Part number TS821ILT TS821AILT TS821BILT 5 Revision history Table 7. Document revision history Date 10-Nov-2005 24-Jul-2007 8/9 Temperature Precision range 2% -40° +85°C 0.5% Revision 1 Initial release. Removed ...

Page 9

TS821 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at ...

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