General Description

Ideal for space critical applications, the LM4040 and LM4041 precision voltage references are available in the subminiature (3mm × 1.3mm) SOT-23 surface-mount package.

The LM4040 is the available in fixed reverse breakdown voltages of 2.500V, 4.096V and 5.000V. The LM4041 is available with a fixed 1.225V or an adjustable reverse breakdown voltage.

The minimum operating current ranges from 60µA for the LM4041-1.2 to 74µA for the LM4040-5.0. LM4040 versions have a maximum operating current of 15mA. LM4041 versions have a maximum operating current of 12mA.

The LM4040 and LM4041 have bandgap reference temperature drift curvature correction and low dynamic impedance, ensuring stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.

Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com.

Features

• Small SOT-23 package

• No output capacitor required

• Tolerates capacitive loads

• Fixed reverse breakdown voltages of 1.225, 2.500V, 4.096V and 5.000V

• Adjustable reverse breakdown version

• Contact Micrel for parts with extended temperature range.

Key Specifications

• Output voltage tolerance .............................±0.1 (max)

• Low output noise (10Hz to 100Hz)

LM4040................................................. 35µVRMS (typ)

LM4041................................................. 20µVRMS (typ)

• Wide operating current range

LM4040..................................................60µA to 15mA

LM4041..................................................60µA to 12mA

• Industrial temperature range .................. –40°C to +85°C

• Low temperature coefficient ................ 100ppm/°C (max)

Applications

• Battery-powered equipment

• Data acquisition systems

• Instrumentation

• Process control

• Energy management

• Product testing

• Automotive electronics

• Precision audio components