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LM4041AELT-1.2-LM4041AILT-1.2-LM4041BELT-1.2-LM4041BILT-1.2-LM4041CELT-1.2-LM4041CILT-1.2-LM4041DECT-1.2-LM4041DELT-1.2-LM4041DICT-1.2-LM4041DILT-1.2
1.225V Micropower shunt voltage reference
February 2014 DocID018817 Rev 4 1/16
LM4041Precision micropower shunt voltage reference
Datasheet - production data
Features Fixed 1.225 V typical output voltage Ultra low operating current: 40 µA at 25 °C High precision: +/- 0.1% @ 25 °C (0.2%, 0.5%
and 1% versions are also available) Stable when used with capacitive loads Industrial (- 40 to+ 85 °C) and Extended (- 40
to +125 °C) temperature range versions
available 100 ppm/°C maximum temperature coefficient Available in SOT23-3L and SOT323-5L
packages
Applications Computers Battery chargers Switch mode power supply Battery operated equipment Data acquisition systems Energy management Instrumentation
DescriptionThe LM4041 is a micropower shunt voltage
reference, providing a stable 1.225 V output
voltage, with an initial accuracy of 0.1% @ 25 °C
and a low temperature coefficient. Available in
SOT323-5L and SOT23-3L surface mount
packages, it can be designed in applications
where space saving is a critical issue. The low
operating current is a key advantage for power
restricted designs. In addition, the LM4041 is very
stable and can be used in a broad range of
application conditions.
Contents LM40412/16 DocID018817 Rev 4
Contents Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DocID018817 Rev 4 3/16
LM4041 Pin configuration
1 Pin configurationNote: Below pins must be left floating or connected to Anode pin to improve noise immunity due to
PCB layout.
SOT23-3L: pin 3.
SOT323-5L: pin 2, pin 4 and pin 5.
Maximum ratings LM40414/16 DocID018817 Rev 4
2 Maximum ratingsNote: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 1. Absolute maximum ratings PD has been calculated with TAMB = 25°C and TJMAX = 150 °C.
Table 2. Thermal data
Table 3. Operating conditions
DocID018817 Rev 4 5/16
LM4041 Electrical characteristics
3 Electrical characteristicsTAMB = 25 °C, unless otherwise specified.
Note: Limits are 100% production tested at 25 °C. Limits over temperature are guaranteed
through correlation and by design.
Table 4. Electrical characteristics Tmax = 85 °C for LM4041xI (industrial version) and Tmax = 125 °C for LM4041xE (extended version). The average temperature coefficient is defined as: 106 x {max(ΔVk) / [Vk@25°C x (Tmax-Tmin)]} [ppm/°C].
Typical performance characteristics LM4041 Typical performance characteristicsThe following plots are referred to the typical application circuit and, unless otherwise noted,
at TA = 25 °C.
Figure 2. Vk change vs. temperature Figure 3. Minimum current for regulation
Figure 4. Output impedance vs. frequency Figure 5. Minimum current for regulation vs.
temperature
DocID018817 Rev 4 7/16
LM4041 Typical performance characteristics
Figure 6. Startup characteristics Figure 7. Startup measure circuit
Figure 8. Wideband noise voltage Package mechanical data LM4041 DocID018817 Rev 4
Package mechanical dataIn order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions, and product status are available at: .
ECOPACK is an ST trademark.
Figure 9. SOT23-3L dimensions
