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LT1009 Datasheet, PDF (1/22 Pages) Texas Instruments – 2.5-V INTEGRATED REFERENCE CIRCUITS
LT1009
www.ti.com................................................................................................................................................................. SLVS013N – MAY 1987 – REVISED MAY 2009
2.5-V INTEGRATED REFERENCE CIRCUIT
FEATURES
1
• Excellent Temperature Stability
• Initial Tolerance: 0.2% Max
• Dynamic Impedance: 0.6 Ω Max
D OR PW PACKAGE
(TOP VIEW)
• Wide Operating Current Range
• Directly Interchangeable With LM136
• Needs No Adjustment for Minimum
Temperature Coefficient
LP PACKAGE
(TOP VIEW)
NC 1
NC 2
NC 3
ANODE 4
8 CATHODE
7 NC
6 CATHODE
5 ADJ
ANODE
CATHODE
ADJ
NC − No internal connection
DESCRIPTION/ORDERING INFORMATION
The LT1009 reference circuit is a precision-trimmed 2.5-V shunt regulator featuring low dynamic impedance and
a wide operating current range. The maximum initial tolerance is ±5 mV in the LP package and ±10 mV in the D
and PW packages. The reference tolerance is achieved by on-chip trimming, which minimizes the initial voltage
tolerance and the temperature coefficient, αVZ.
Although the LT1009 needs no adjustments, a third terminal (ADJ) allows the reference voltage to be adjusted
±5% to eliminate system errors. In many applications, the LT1009 can be used as a terminal-for-terminal
replacement for the LM136-2.5, which eliminates the external trim network.
The LT1009 uses include 5-V system references, 8-bit analog-to-digital converter (ADC) and digital-to-analog
converter (DAC) references, and power-supply monitors. The device also can be used in applications such as
digital voltmeters and current-loop measurement and control systems.
The LT1009C is characterized for operation from 0°C to 70°C. The LT1009I is characterized for operation from
–40°C to 85°C.
SYMBOL
ANODE
CATHODE
ADJ
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1987–2009, Texas Instruments Incorporated
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