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LM4040DYM3-2.5TR Datasheet, PDF (1/16 Pages) Micrel Semiconductor – Precision Micropower Shunt Voltage Reference | |||
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LM4040/4041
LM4040/4041
Micrel, Inc.
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4040 and LM4041
precision voltage references are available in the subminiature
(3mm à 1.3mm) SOT-23 surface-mount package.
The LM4040 is the available in ï¬xed reverse breakdown
voltages of 2.500V, 4.096V and 5.000V. The LM4041 is avail-
able with a ï¬xed 1.225V or an adjustable reverse breakdown
voltage.
The minimum operating current ranges from 60µA for the
LM4041-1.2 to 74µA for the LM4040-5.0. LM4040 versions
have a maximum operating current of 15mA. LM4041 ver-
sions have a maximum operating current of 12mA.
The LM4040 and LM4041 have bandgap reference tempera-
ture drift curvature correction and low dynamic impedance,
ensuring stable reverse breakdown voltage accuracy over a
wide range of operating temperatures and currents.
Data sheets and support documentation can be found on
Micrelâs web site at www.micrel.com.
Features
⢠Small SOT-23 package
⢠No output capacitor required
⢠Tolerates capacitive loads
⢠Fixed reverse breakdown voltages of 1.225, 2.500V,
4.096V and 5.000V
⢠Adjustable reverse breakdown version
⢠Contact Micrel for parts with extended temperature
range.
Key Speciï¬cations
⢠Output voltage tolerance ............................. ±0.1% (max)
⢠Low output noise (10Hz to 100Hz)
LM4040................................................. 35µVRMS (typ)
LM4041................................................. 20µVRMS (typ)
⢠Wide operating current range
LM4040..................................................60µA to 15mA
LM4041..................................................60µA to 12mA
⢠Industrial temperature range .................. â40°C to +85°C
⢠Low temperature coefï¬cient ................ 100ppm/°C (max)
Applications
⢠Battery-powered equipment
⢠Data acquisition systems
⢠Instrumentation
⢠Process control
⢠Energy management
⢠Product testing
⢠Automotive electronics
⢠Precision audio components
Typical Applications
VS
RS
VR
LM4040
LM4041
IQ + IL
IL VO
IQ
Figure 1. LM4040, LM4041 Fixed
Shunt Regulator Application
VS
RS
LM4041
Adjustable
VO
R1
VO = 1.233 (R2/R1 + 1)
R2
Figure 2. LM4041 Adjustable
Shunt Regulator Application
Micrel, Inc. ⢠2180 Fortune Drive ⢠San Jose, CA 95131 ⢠USA ⢠tel + 1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
March 2005
1
M9999-031805
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