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LM4040/LM4040Q
April 12, 2012
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4040 precision
voltage reference is available in the sub-miniature SC70 and
SOT-23 surface-mount package. The LM4040's advanced
design eliminates the need for an external stabilizing capac-
itor while ensuring stability with any capacitive load, thus
making the LM4040 easy to use. Further reducing design ef-
fort is the availability of several fixed reverse breakdown
voltages: 2.048V, 2.500V, 3.000V, 4.096V, 5.000V, 8.192V,
and 10.000V. The minimum operating current increases from
60 μA for the LM4040-2.5 to 100 μA for the LM4040-10.0. All
versions have a maximum operating current of 15 mA.
The LM4040 utilizes fuse and zener-zap reverse breakdown
voltage trim during wafer sort to ensure 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 ensure stable reverse breakdown
voltage accuracy over a wide range of operating tempera-
tures and currents.
Also available is the LM4041 with two reverse breakdown
voltage versions: adjustable and 1.2V. Please see the
LM4041 data sheet.
Features
■
2.5V/SOT-23 AEC Q-100 Grades 1 and 3 available
■
Small packages: SOT-23, TO-92 and SC70
■
No output capacitor required
■
Tolerates capacitive loads
■
Fixed reverse breakdown voltages of 2.048V, 2.500V,
3.000V, 4.096V, 5.000V, 8.192V, and 10.000V
Key Specifications (LM4040-2.5)
■ Output voltage tolerance
(A grade, 25°C) ±0.1% (max)
■ Low output noise
(10 Hz to 10 kHz)
35 μV
rms
(typ)
■ Wide operating current range
60 μA to 15 mA
■ Industrial temperature range
−40°C to +85°C
■ Extended temperature range
−40°C to +125°C
■ Low temperature coefficient
100 ppm/°C (max)
Applications
■
Portable, Battery-Powered Equipment
■
Data Acquisition Systems
■
Instrumentation
■
Process Control
■
Energy Management
■
Product Testing
■
Automotive
■
Precision Audio Components
Connection Diagrams
SOT-23
1132301
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number MF03A
(JEDEC Registration TO-236AB)
TO-92
1132303
Bottom View
See NS Package Number Z03A
SC70
1132330
*This pin must be left floating or connected to pin 1.
Top View
See NS Package Number MAA05A
© 2012 Texas Instruments Incorporated 11323 SLOS456L www.ti.com
LM4040/LM4040Q Precision Micropower Shunt Voltage Reference
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