LT1009 Series
2.5V Reference
FEATURES
DESCRIPTION
n
The LT®1009 is a precision trimmed 2.5V shunt regulator 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.
n
n
n
n
n
n
Maximum Initial Tolerance: 0.2%
Guaranteed Temperature Stability
Maximum 0.6Ω Dynamic Impedance
Wide Operating Current Range
Directly Interchangeable with LM136 for Improved
Performance
No Adjustments Needed for Minimum Temperature
Coefficient
Available in 8-Lead SO and MSOP Packages and
3-Lead TO-92 Package
APPLICATIONS
n
n
n
n
n
Reference for 5V Systems
8-Bit A/D and D/A Reference
Digital Voltmeters
Current Loop Measurement and Control Systems
Power Supply Monitor
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.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
2.5V Reference
Output Voltage
5V TO 35V
2.53
3.6k
LT1009
10k*
TRIM
*DOES NOT AFFECT
TEMPERATURE COEFFICIENT.
±5% TRIM RANGE
1009 TA01
REFERENCE VOLTAGE (V)
2.52
OUTPUT
2.51
GUARANTEED
MAXIMUM
TYPICAL
2.50
2.49
GUARANTEED
MINIMUM
2.48
2.47
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
1009 TA02
1009ff
1