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.