LM2851.2, LM3851.2, LM385B1.2

MICROPOWER VOLTAGE REFERENCES

SLVS075H − APRIL 1989 − REVISED FEBRUARY 2005

1

POST OFFICE BOX 655303

− LM285 ...10

µA to 20 mA

− LM385 ...15

µA to 20 mA

− LM385B ...15

µA to 20 mA

− LM385 ...1

Ω Max at 25°C

− All Devices . . . 1.5

Ω Max Over Full

Temperature Range

− Portable Meter References

− Portable Test Instruments

− Battery-Operated Systems

− Current-Loop Instrumentation

− Panel Meters

LM285-1.2 and LM385-1.2

description/ordering information

These micropower, two-terminal, band-gap voltage references operate over a 10-

µA to 20-mA current range

and feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming provides

tight voltage tolerance. The band-gap reference for these devices has low noise and long-term stability.

ORDERING INFORMATION

TA

VZ

TOLERANCE

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SOIC (D)

Tube of 75

LM385D-1-2

385-12

SOIC (D)

Reel of 2000

LM385DR-1-2

385-12

SOP (PS)

Reel of 2000

LM385PSR-1-2

L385-12

2%

TO-226 / TO-92 (LP)

Tube of 1000

LM385LP-1-2

385-12

2%

TO-226 / TO-92 (LP)

Reel of 2000

LM385LPR-1-2

385-12

TSSOP (PW)

Tube of 150

LM385PW-1-2

385-12

0

°C to 70°C

TSSOP (PW)

Reel of 2000

LM385PWR-1-2

385-12

0 C to 70 C

SOIC (D)

Tube of 75

LM385BD-1-2

385B12

SOIC (D)

Reel of 2000

LM385BDR-1-2

385B12

1%

TO-226 / TO-92 (LP)

Tube of 1000

LM385BLP-1-2

385-12

1%

TO-226 / TO-92 (LP)

Reel of 2000

LM385BLPR-1-2

385-12

TSSOP (PW)

Tube of 150

LM385BPW-1-2

385B12

TSSOP (PW)

Reel of 2000

LM385BPWR-1-2

385B12

SOIC (D)

Tube of 75

LM285D-1-2

285-12

−40

°C to 85°C

1%

SOIC (D)

Reel of 2000

LM285DR-1-2

285-12

−40 C to 85 C

1%

TO-226 / TO-92 (LP)

Tube of 1000

LM285LP-1-2

285-12

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

at www.ti.com/sc/package.

Copyright

 2005, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

1

2

3

4

8

7

6

5

NC

NC

NC

ANODE

CATHODE

NC

NC

NC

LM285-1.2 ... D PACKAGE

LM385-1.2 . . . D, PS, OR PW PACKAGE

LM385B-1.2 ...D OR PW PACKAGE

(TOP VIEW)

NC − No internal connection

LM285-1.2, LM385-1.2, LM385B-1.2 . . . LP PACKAGE

(TOP VIEW)

NC − No internal connection

NC

CATHODE

ANODE