Date: 11/29/04

SPX4041 Precision 1.24V Shunt Voltage Reference

© Copyright 2004 Sipex Corporation

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FEATURES

■ Voltage Tolerance........................1% and 2%

■ Wide Operating Curren..........100µA to 15mA

■ Low Temperature Coefficient.........50ppm/°C

■ Fixed Reverse Breakdown Voltage.......1.24V

■ No Output Capacitance Required

■ Two Terminal "Zener" Operation

■ Improved Replacement for TL431

Precision 1.24V Shunt Voltage Reference

SPX4041

The SPX4041 is a 2-terminal, temperature compensated, band-gap voltage reference which

provides a fixed 1.24V output for input currents between 160µA and 15mA. The bandgap voltage

(1.24V) is independently laser trimmed from the output voltage to achieve a very low temperature

coefficient, then the output voltage is trimmed to 1.24V. This trimming technique and the low

temperature coefficient (A grade: 50 ppm/°C) thin film resistor process gives a very stable device

over the full temperature range. The SPX4041 is available in the sub miniature 3 pin SOT-23,

3 pin TO-92 or 8 pin NSOIC packages. The operating temperature is -40°C to 85°C. The

SPX4041 advanced design eliminates the need for an external stabilized capacitor while insuring

stability with any capacitive load, making it easy to use.

®

Figure 1: Block Diagram

APPLICATIONS

■ Constant Current Source

■ Digital Voltmeter

■ Power Management

■ Precision Regulators

Anode (A)

Cathode (K)

1.24V

+

-

DESCRIPTION

TYPICAL APPLICATIONS CIRCUIT

Now Available in Lead Free Packaging

■ Battery Powered Equipment

■ Instrumentation

■ Automotive Electronics

■ Data Acquisition Systems

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3

4

5

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7

8

SPX4041

8 Pin nSOIC

CATHODE

N/C

ANODE

N/C

N/C

N/C

N/C

N/C