LT1009 Series
2.5V Reference
FEATURES DESCRIPTION
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Maximum Initial Tolerance: 0.2%
The LT 1009 is a precision trimmed 2.5V shunt regula-
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Guaranteed Temperature Stability
tor diode featuring a maximum initial tolerance of only
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Maximum 0.6 Dynamic Impedance
5mV. The low dynamic impedance and wide operating
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Wide Operating Current Range
current range enhances its versatility. The 0.2% reference
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Directly Interchangeable with LM136 for Improved
tolerance is achieved by on-chip trimming which not only
Performance
minimizes the initial voltage tolerance but also minimizes
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No Adjustments Needed for Minimum Temperature
the temperature drift.
Coef cient
Even though no adjustments are needed with the LT1009,
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Available in 8-Lead SO and MSOP Packages and
a third terminal allows the reference voltage to be adjusted
3-Lead TO-92 Package
5% to calibrate out system errors. In many applications,
the LT1009 can be used as a pin-to-pin replacement of the
LM136 and the external trim network eliminated.
APPLICATIONS
For a lower drift 2.5V reference, see the LT1019 data
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Reference for 5V Systems
sheet.
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8-Bit A/D and D/A Reference
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
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Digital Voltmeters
All other trademarks are the property of their respective owners.
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Current Loop Measurement and Control Systems
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Power Supply Monitor
TYPICAL APPLICATION
2.5V Reference Output Voltage
5V TO 35V 2.53
3.6k
2.52
OUTPUT
GUARANTEED
2.51
MAXIMUM
10k*
LT1009
TRIM
TYPICAL
2.50
2.49
GUARANTEED
*DOES NOT AFFECT
MINIMUM
TEMPERATURE COEFFICIENT.
5% TRIM RANGE
2.48
1009 TA01
2.47
50 25 50 75 100 125
25 0
TEMPERATURE (C)
1009 TA02
1009ff
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REFERENCE VOLTAGE (V)LT1009 Series
ABSOLUTE MAXIMUM RATINGS (Note 1)
Operating Temperature Range
Reverse Current .....................................................20mA
LT1009/LT1009C ...................................... 0C to 70C
Forward Current .....................................................10mA
LT1009I .............................................. 40C to 85C
Storage Temperature Range ...................65C to 150C
LT1009M (OBSOLETE) ..................... 55C to 125C
Lead Temperature (Soldering, 10 sec) .................. 300C
PIN CONFIGURATION
BOTTOM VIEW
+
TOP VIEW
ADJ
NC 1 8 (+)
NC 2 7 NC
6 (+)
NC 3
() 4 5 ADJ
H PACKAGE
MS8 PACKAGE
3-LEAD TO-46 METAL CAN
8-LEAD PLASTIC MSOP
T = 150C, = 440C/W, = 80C/W
JMAX JA JC T = 150C, = 250C/W
JMAX JA
OBSOLETE PACKAGE
Consider the MS8, S8 or Z Packages for Alternate Source
TOP VIEW
BOTTOM VIEW
NC 1 8
(+)
+
ADJ
NC 2 7
NC
NC 3 6 (+)
() 4 5 ADJ
Z PACKAGE
S8 PACKAGE
3-LEAD PLASTIC TO-92
8-LEAD PLASTIC SO
T = 100C, = 160C/W
JMAX JA
T = 150C, = 190C/W
JMAX JA
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1009MH#PBF LT1009MH#TRPBF 3-Lead TO-46 Metal Can 55C to 125C
LT1009CH#PBF LT1009CH#TRPBF 3-Lead TO-46 Metal Can 0C to 70C
LT1009CMS8#PBF LT1009CMS8#TRPBF LTQZ 8-Lead Plastic MSOP 0C to 70C
LT1009S8#PBF LT1009S8#TRPBF 1009 8-Lead Plastic SO 0C to 70C
LT1009IS8#PBF LT1009IS8#TRPBF 1009I 8-Lead Plastic SO 40C to 85C
LT1009CZ#PBF LT1009CZ#TRPBF 3-Lead Plastic TO-92 0C to 70C
LT1009IZ#PBF LT1009IZ#TRPBF 3-Lead Plastic TO-92 40C to 85C
1009ff
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