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FEATURES

DESCRIPTION/ORDERING INFORMATION

1

2

3

4

8

7

6

5

NC

NC

NC

ANODE

CATHODE

NC

CATHODE

ADJ

D OR PW PACKAGE

(TOP VIEW)

NC − No internal connection

ANODE

CATHODE

ADJ

LP PACKAGE

(TOP VIEW)

LT1009

2.5-V INTEGRATED REFERENCE CIRCUIT

SLVS013L – MAY 1987 – REVISED SEPTEMBER 2005

•

Excellent Temperature Stability

•

Initial Tolerance

…0.2% Max

•

Dynamic Impedance

…0.6 Ω Max

•

Wide Operating Current Range

•

Directly Interchangeable With LM136

•

Needs No Adjustment for Minimum

Temperature Coefficient

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 package. The reference

tolerance is achieved by on-chip trimming, which

minimizes the initial voltage tolerance and the

temperature coefficient,

α

<br/>

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.

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

Tube of 75

LT1009CD

SOIC – D

1009C

Reel of 2500

LT1009CDR

Bulk of 1000

LT1009CLP

0

°C to 70°C

TO-226/TO-92 – LP

Ammo of 2000

LT1009CLPM

LT1009C

Reel of 2000

LT1009CLPR

Tube of 150

LT1009CPW

TSSOP – PW

1009C

Reel of 2000

LT1009CPWR

Tube of 75

LT1009ID

SOIC – D

1009I

Reel of 2500

LT1009IDR

Bulk of 1000

LT1009ILP

–40

°C to 85°C

TO-226/TO-92 – LP

Ammo of 2000

LT1009ILPM

LT1009I

Reel of 2000

LT1009ILPR

Tube of 150

LT1009IPW

TSSOP – PW

1009I

Reel of 2000

LT1009IPWR

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

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.

Copyright © 1987–2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.