1

Date: 5/25/04

SPX1004 1.2V/2.5V Micropower Voltage Reference

© Copyright 2004 Sipex Corporation

SPX1004

FEATURES

■ Initial Voltage Tolerance:

SPX1004-1.2 = ±4mV

SPX1004-2.5 = ±20mV

■ Low Dynamic Impedance

0.6 Ω Max.

■ Low Operating Current:

SPX1004-1.2 = ±10µA

SPX1004-2.5 = ±20µA

■ Wide Operating Current Range

10µA to 20mA

■ Direct Replacement for LT1004,

LM1004 and AS1004

®

APPLICATIONS

■ A/D and D/A Reference

■ Reference for 5V Systems

■ Digital Voltmeter

■ Power Supply Monitor

BLOCK DIAGRAMS

1.2V / 2.5V Micropower Voltage Reference

Figure 1a. SPX1004-1.2 Block Diagram

Figure 1b. SPX1004-2.5 Block Diagram

1.235V

+

-

Cathode (K)

Anode (A)

+

-

Cathode (K)

Anode (A)

1.250V

500k

500k

The SPX1004 is a 2-terminal bandgap precision voltage reference that provides a stable

fixed output voltage of 1.2V and 2.5V with a tolerance of ±4mV for SPX1004-1.2 and ±20mV

for SPX1004-2.5. Design, process and precision on chip trimming yield a very low tempera-

ture coefficient of 25 ppm/°C.

The SPX1004 can be used as a pin-to-pin replacement for the LT1004, LM1004 or AS1004.

The SPX1004 is available in SOT-89, SOIC-8 and TO-92 packages over the operating

temperature range of 0°C to 70°C.

DESCRIPTION

1

2

3

4

5

6

7

8

N/C

SPX1004

8 Pin nSOIC

CATHODE

N/C

N/C

N/C

ANODE

ANODE

CATHODE

Now Available in Lead Free Packaging