TLH9110

December 1994

LM169LM369 Precision Voltage Reference

General Description

The LM169LM369 are precision monolithic temperature-

compensated voltage references They are based on a bur-

ied zener reference as pioneered in the LM199 references

but do not require any heater as they rely on special tem-

perature-compensation techniques (Patent Pending) The

LM169 makes use of thin-film technology enhanced by the

discrete laser trimming of resistors to achieve excellent

ppm C) along with tight initial tolerances (as low as 005%

max) The trim scheme is such that individual resistors are

cut open rather than being trimmed (partially cut) to avoid

resistor drift caused by electromigration in the trimmed area

The LM169 also provides excellent stability vs changes in

input voltage and output current (both sourcing and sinking)

The devices have a 10000V output and will operate in ei-

ther series or shunt mode the output is short-circuit-proof to

ground A trim pin is available which permits fine-trimming of

put noise by adding a small capacitor (005 to 05 mF)

Features

Y

Low Tempco

3 ppm C (max)

Y

Excellent initial accuracy

g

5 mV (max)

Y

Excellent line regulation

4 ppmV (max)

Y

Excellent output impedance

g

08X (max)

Y

Excellent thermal regulation

g

20 ppm100 mW (max)

Y

Low noise

Y

Easy to filter output noise

Y

Operates in series or shunt mode

Applications

Y

High-Resolution Data Acquisition Systems

Y

Digital volt meters

Y

Weighing systems

Y

Precision current sources

Y

Test Equipment

Connection Diagrams

Metal Can Package (H)

TLH9110 – 1

Top View

(Case is connected to ground)

Do not connect internal connection for factory trims

Order Number LM169H LM169BH

LM169H883 LM369H or LM369BH

See NS Package Number H08C

Dual-In-Line Package (N)

or SO Package (M)

TLH9110 – 5

Top View

Order Number LM369DM LM369DMX

LM369N

LM369BN LM369CN or LM369DN

See NS Package Number M08A or N08E

X denotes 2500 units on Tape and Reel and is not included in the device

part number marking

TO-226 Plastic Package (RC)

TLH9110 – 28

Bottom View

Order Number LM369DRC

See NS Package Number RC03A

Teflon

and Mylar

are registered trademarks of EI DuPont Corp

C1995 National Semiconductor Corporation

RRD-B30M115Printed in U S A