1 Features
• LM4040-N-Q1 AEC Q-100 qualified for automotive
applications
– Extended Grade 1: −40°C to +125°C, TA
– Industrial Grade 3: −40°C to +85°C, TA
• Small packages: SOT-23, TO-92, and SC70
• No output capacitor required
• Tolerates capacitive loads
• Fixed reverse breakdown voltages of 2.048V, 2.5V,
3V, 4.096V, 5V, 8.192V, and 10V
• Key specifications (2.5V LM4040-N)
– Output voltage tolerance (A Grade, 25°C):
±0.1% (maximum)
– Low output noise (10Hz to 10kHz): 35μVrms
(typical)
– Wide operating current range: 60μA to 15mA
– Industrial temperature range: −40°C to +85°C
– Extended temperature range: −40°C to +125°C
– Low temperature coefficient: 100ppm/°C
(maximum)

2 Applications
• Field Transmitters
• Energy Infrastructure
• Data Acquisition
• Analog Input Module
• Automotive
• Audio and Video

3 Description
Designed for space-critical applications, the LM4040-
N precision voltage reference is available in small
SC70 and SOT-23 surface-mount package. The
advanced design of the LM4040-N eliminates the
need for an external stabilizing capacitor while
maintaining stability with any capacitive load, thus
making the LM4040-N easy to use. Further reducing
design effort is the availability of several fixed reverse
breakdown voltages: 2.048V, 2.5V, 3V, 4.096V, 5V,
8.192V, and 10V. The minimum operating current
increases from 60μA for the 2.5V LM4040-N to 100μA
for the 10V LM4040-N. All versions have a maximum
operating current of 15mA.
The LM4040-N uses a fuse and Zener-zap reverse
breakdown voltage trim during wafer sort to make
sure that the prime parts have an accuracy of
better than ±0.1% (A grade) at 25°C. Bandgap
reference temperature drift curvature correction and
low dynamic impedance provide stable reverse
breakdown voltage accuracy over a wide range of
operating temperatures and currents.
Also available is the LM4041-N with two reverse
breakdown voltage versions: adjustable and 1.2V.
See the LM4041-N data sheet (SNOS641).