1 Features

• Fixed output voltages of 2.048V, 2.5V, 3V, 4.096V,

5V, 8.192V, and 10V

• Tight output tolerances and low temperature

coefficient

– Maximum 0.1%, 100ppm/°C – A Grade

– Maximum 0.2%, 100ppm/°C – B Grade

– Maximum 0.5%, 100ppm/°C – C Grade

– Maximum 1.0%, 150ppm/°C – D Grade

• Low output noise: 35μVRMS typical

• Wide operating current range: 45μA typical to

15mA

• Stable with all capacitive loads; no output

capacitor required

• Available in extended temperature range: –40°C to

125°C

2 Applications

• Data-Acquisition Systems

• Energy Infrastructure

• Analog Input Module

• Field Transmitters

• Precision Audio

• Automotive Electronics

3 Description

The LM4040 series of shunt voltage references are

versatile, easy-to-use references that cater to a vast

array of applications. The 2-pin fixed-output device

requires no external capacitors for operation and

is stable with all capacitive loads. Additionally, the

reference offers low dynamic impedance, low noise,

and low temperature coefficient to maintain a stable

output voltage over a wide range of operating currents

and temperatures. The LM4040 uses fuse and Zenerzap

reverse breakdown voltage trim during wafer sort

to offer four output voltage tolerances, ranging from

0.1% (maximum) for the A grade to 1% (maximum) for

the D grade. Thus, a great deal of flexibility is offered

to designers in choosing the best cost-to-performance

ratio for their applications.

Packaged in space-saving SC-70 and SOT-23-3

packages and requiring a minimum current of 45μA

(typical), the LM4040 also is designed for portable

applications. The LM4040xI is characterized for

operation over an ambient temperature range of –

40°C to 85°C. The LM4040xQ is characterized for

operation over an ambient temperature range of –

40°C to 125°C.