LM385BMX-2.5 National Semiconductor, LM385BMX-2.5 Datasheet

LM385BMX-2.5

Manufacturer Part Number

LM385BMX-2.5

Description

IC,VOLT REFERENCE,FIXED,2.5V,BIPOLAR,SOP,8PIN,PLASTIC

Manufacturer

National Semiconductor

Datasheets

1.LM285BXZ-2.5.pdf (14 pages)

2.LM385BMX-2.5.pdf (13 pages)

Specifications of LM385BMX-2.5

Rohs Compliant

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LM185-2.5/LM285-2.5/LM385-2.5

Micropower Voltage Reference Diode

General Description

The

2-terminal band-gap voltage regulator diodes. Operating

over a 20 µA to 20 mA current range, they feature exception-

ally low dynamic impedance and good temperature stability.

On-chip trimming is used to provide tight voltage tolerance.

Since the LM-185-2.5 band-gap reference uses only transis-

tors and resistors, low noise and good long term stability re-

sult.

Careful design of the LM185-2.5 has made the device ex-

ceptionally tolerant of capacitive loading, making it easy to

use in almost any reference application. The wide dynamic

operating range allows its use with widely varying supplies

with excellent regulation.

The extremely low power drain of the LM185-2.5 makes it

useful for micropower circuitry. This voltage reference can be

used to make portable meters, regulators or general purpose

analog circuitry with battery life approaching shelf life. Fur-

ther, the wide operating current allows it to replace older ref-

erences with a tighter tolerance part. For applications requir-

ing 1.2V see LM185-1.2.

Connection Diagrams

Pin 3 is attached to the Die Attach Pad (DAP) and should be connected to Pin 2 or left floating.

LM185-2.5/LM285-2.5/LM385-2.5

LM385BXZ-2.5 or LM385BYZ-2.5

See NS Package Number Z03A

LM285BXZ-2.5, LM285BYZ-2.5

LM385AYZ-2.5, LM385BZ-2.5,

Order Number LM285Z-2.5,

LM385Z-2.5, LM385AXZ-2.5

Plastic Package

Bottom View

TO-92

DS005519-8

DS005519

are

See NS Package Number MA03B

micropower

Order Number LM385M3-2.5

SOT-23

DS005519-29

The LM185-2.5 is rated for operation over a −55˚C to 125˚C

temperature range while the LM285-2.5 is rated −40˚C to

85˚C and the LM385-2.5 0˚C to 70˚C. The LM185-2.5/

LM285-2.5 are available in a hermetic TO-46 package and

the LM285-2.5/LM385-2.5 are also available in a low-cost

TO-92 molded package, as well as S.O. and SOT-23. The

LM185-2.5 is also available in a hermetic leadless chip car-

rier package.

Features

n Operating current of 20 µA to 20 mA

n 0.6

n Low temperature coefficient

n Low voltage reference — 2.5V

n 1.2V device and adjustable device also

available — LM185-1.2 series and LM185 series,

respectively

20 mV (

dynamic impedance (A grade)

LM385BXM-2.5 or LM385BYM-2.5

See NS Package Number M08A

LM285BXM-2.5, LM285BYM-2.5

0.8%) max. initial tolerance (A grade)

Order Number LM285M-2.5,

LM385M-2.5, LM385BM-2.5

SO Package

DS005519-11

December 1999

www.national.com

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