LM4040
www.ti.com .................................................................................................................................................. SLOS456K – JANUARY 2005 – REVISED MARCH 2008
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
FEATURES
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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 μVRMS Typ
Wide Operating Current Range…45 μA Typ to
15 mA
Stable With All Capacitive Loads; No Output
Capacitor Required
Available in Extended Temperature
Range…–40°C to 125°C
APPLICATIONS
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Data-Acquisition Systems
Power Supplies and Power-Supply Monitors
Instrumentation and Test Equipment
Process Controls
Precision Audio
Automotive Electronics
Energy Management
Battery-Powered Equipment
DBZ (SOT-23) PACKAGE
(TOP VIEW)
CATHODE
1
3*
ANODE
2
* Pin 3 is attached to substrate and must be
connected to ANODE or left open.
DCK (SC-70) PACKAGE
(TOP VIEW)
ANODE
NC
CATHODE
1
5
NC
4
NC
2
3
NC – No internal connection
LP (TO-92/TO-226) PACKAGE
(TOP VIEW)
ANODE
CATHODE
NC
NC – No internal connection
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 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 μA (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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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains
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.
Copyright © 2005–2008, Texas Instruments Incorporated
