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LT1009 Series
1
1009ff
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
2.5V Reference
The LT
®
1009 is a precision trimmed 2.5V shunt regula-
tor diode featuring a maximum initial tolerance of only
±5mV. The low dynamic impedance and wide operating
current range enhances its versatility. The 0.2% reference
tolerance is achieved by on-chip trimming which not only
minimizes the initial voltage tolerance but also minimizes
the temperature drift.
Even though no adjustments are needed with the LT1009,
a third terminal allows the reference voltage to be adjusted
±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.
For a lower drift 2.5V reference, see the LT1019 data
sheet.
2.5V Reference
n
Reference for 5V Systems
n
8-Bit A/D and D/A Reference
n
Digital Voltmeters
n
Current Loop Measurement and Control Systems
n
Power Supply Monitor
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
n
Maximum Initial Tolerance: 0.2%
n
Guaranteed
Temperature Stability
n
Maximum 0.6Ω Dynamic Impedance
n
Wide Operating Current Range
n
Directly Interchangeable with LM136 for Improved
Performance
n
No Adjustments Needed for Minimum Temperature
Coeffi cient
n
Available in 8-Lead SO and MSOP Packages and
3-Lead TO-92 Package
LT1009
OUTPUT
3.6k
5V TO 35V
10k*
TRIM
1009 TA01
*DOES NOT AFFECT
TEMPERATURE COEFFICIENT.
±5% TRIM RANGE
Output Voltage
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
2.53
2.52
2.51
2.50
2.49
2.48
2.47
25 75
1009 TA02
–25 0
50 100 125
TYPICAL
GUARANTEED
MAXIMUM
GUARANTEED
MINIMUM
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