Date:05/21/04

SPX385-2.5 Micropower Voltage Reference

© Copyright 2004 Sipex Corporation

1

FEATURES

■ Trimmed Bandgap ............................ 1% and 2%

■ Wide Operating Current ............... 20µA to 20mA

■ Extended Temperature Range ... -40°C to +85°C

■ Dynamic Impedance .............................. 1Ω max

■ Offered in SOT-23, TO-92, SOIC, and SOT-89

■ Improved Replacement for LM185/285/385-2.5V,

AS385-2.5

■ Low Cost Solution

Micropower Voltage Reference

SPX385-2.5

The SPX385-2.5 is a micropower 2-terminal band-gap voltage reference with a very wide

operating current range from 20µA to 20mA that provides a stable voltage. The high stability of

this device is primarily the result of the low temperature coefficient Thin Film Resistor process and

Laser Trimming of the output voltage at the wafer level.

The SPX385-2.5 is available in a SOT-23, TO-92, SOIC-8 and SOT-89 package with an operating

temperature range of -40°C to 85°C. A 1.2 and 5 volt device is also available - SPX385-1.2 and

SPX385-5.

Figure 1: Block Diagram

APPLICATIONS

■ Battery Operating Equipment

■ Adjustable Supplies

■ Switching Power Supplies

■ Error Amplifiers

■ Single Supply Amplifier

■ Monitors / VCR / TV

■ Personal Computers

Anode (A)

Cathode (K)

1.25V

+

-

500k

500k

DESCRIPTION

BLOCK DIAGRAM

SPX385

3 Pin SOT-23

Cathode

N/C

Anode

Refer to page 4 for pinouts.