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FEATURES
APPLICATIONS
* Pin 3 is attached to substrate and must be
connected to ANODE or left open.
DBZ (SOT-23) PACKAGE
(TOP VIEW)
CATHODE
ANODE
DCK (SC-70) PACKAGE
(TOP VIEW)
ANODE
NC
CATHODE
NC
NC
1
2
3*
1
2
3
5
4
NC
CATHODE
ANODE
LP (TO-92/TO-226) PACKAGE
(TOP VIEW)
NC – No internal connectionNC – No internal connection
NC – No internal connection
DESCRIPTION/ORDERING INFORMATION
LM4040
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLOS456K – JANUARY 2005 – REVISED MARCH 2008
www.ti.com
• Fixed Output Voltages of 2.048 V, 2.5 V, 3 V,
4.096 V, 5 V, 8.192 V, and 10 V
• Tight Output Tolerances and Low Temperature
Coefficient
– Max 0.1%, 100 ppm/ ° C – A Grade
– Max 0.2%, 100 ppm/ ° C – B Grade
– Max 0.5%, 100 ppm/ ° C – C Grade
– Max 1.0%, 150 ppm/ ° C – D Grade
• Low Output Noise … 35 µ V
RMS
Typ
• Wide Operating Current Range … 45 µ A Typ to
15 mA
• Stable With All Capacitive Loads; No Output
Capacitor Required
• Available in Extended Temperature
Range … – 40 ° C to 125 ° C
• Data-Acquisition Systems
• Power Supplies and Power-Supply Monitors
• Instrumentation and Test Equipment
• Process Controls
• Precision Audio
• Automotive Electronics
• Energy Management
• Battery-Powered Equipment
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 four output voltage
tolerances, ranging from 0.1% (max) for the A grade to 1% (max) 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 45 µ A (typ), the
LM4040 also is ideal 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.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains
Copyright © 2005 – 2008, Texas Instruments Incorporated
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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