1FEATURES
• Fixed Output Voltage of 2.5 V
• Tight Output Tolerances and Low Temperature
Coefficient
– Max 0.65%, 100 ppm/°C
• Low Output Noise: 35 μVRMS Typ
• Wide Operating Current Range: 45 μA Typ to
15 mA
• Stable With All Capacitive Loads; No Output
Capacitor Required

APPLICATIONS
• Data-Acquisition Systems
• Power Supplies and Power-Supply Monitors
• Instrumentation and Test Equipment
• Process Controls
• Precision Audio
• Automotive Electronics
• Energy Management
• Battery-Powered Equipment

SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (–55°C/125°C)
Temperature Range(1)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability

DESCRIPTION/ORDERING INFORMATION
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 ensure a stable output voltage over a wide range of operating currents and temperatures. The
LM4040 uses fuse and Zener-zap reverse breakdown voltage trim during wafer sort to offer an output voltage
tolerance of 0.65%.
Packaged in a space-saving SOT-23-3 package and requiring a minimum current of 45 μA (typ), the LM4040
also is ideal for portable applications. The LM4040C25 is characterized for operation over an ambient
temperature range of –55°C to 125°C.