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What is LM4040?

This electronic component, produced by the manufacturer "Micrel Semiconductor", performs the same function as "Precision Micropower Shunt Voltage Reference".


LM4040 Datasheet PDF - Micrel Semiconductor

Part Number LM4040
Description Precision Micropower Shunt Voltage Reference
Manufacturers Micrel Semiconductor 
Logo Micrel Semiconductor Logo 


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LM4040/LM4041
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 × 1.3mm) SOT-23 surface-mount
package.
The LM4040 is available in fixed reverse breakdown
voltages of 2.500V, 4.096V, and 5.000V. The LM4041 is
available with a fixed 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
versions have a maximum operating current of 12mA.
The LM4040 and LM4041 have bandgap reference
temperature drift curvature correction and low dynamic
impedance, ensuring stable reverse breakdown voltage
accuracy over a wide range of operating temperatures and
currents.
Datasheets and support documentation are available on
Micrel’s 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.
Applications
Battery-powered equipment
Data acquisition systems
Instrumentation
Process control
Energy management
Product testing
Automotive electronics
Precision audio components
Typical Application
LM4040, LM4041 Fixed Shunt
Regulator Application
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
June 24, 2014
Revision 3.0

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LM4040 equivalent
Micrel, Inc.
LM4040/LM4041
LM4040-4.1 Electrical Characteristics(5) (Continued)
TA = Operating Temperature Range, bold values indicate TA = TJ = 40°C to +85°C, unless noted.
Symbol Parameter
Condition
Min.
LM4040D
Reverse Breakdown Voltage
VR
Reverse Breakdown Voltage
IR = 100µA
Tolerance(6)
Typ.
4.096
IRMIN
Minimum Operating Current
50
ΔVR/ΔT
ΔVR/ΔIR
Average Reverse Breakdown
Voltage Temperature
Coefficient
IR = 10mA
IR = 1mA
IR = 100µA
Reverse Breakdown Voltage
Change with Operating Current
Change
IRMIN IR 1mA
1mA IR 15mA
±30
±20
±20
0.5
3.0
ZR Reverse Dynamic Impedance IR = 1mA, f = 120Hz, IAC = 0.1IR
eN Wideband Noise
IR = 100µA, 10Hz f 10kHz
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs., T = 25°C ±0.1°C, IR = 100µA
0.5
80
120
Max.
±41
±81
73
78
±150
1.2
1.5
9.0
13.0
1.3
Units
V
mV
mV
µA
µA
ppm/°C
ppm/°C
ppm/°C
mV
mV
mV
mV
µVRMS
ppm
LM4040-5.0 Electrical Characteristics(5)
TA = Operating Temperature Range, bold values indicate TA = TJ = 40°C to +85°C, unless noted.
Symbol Parameter
Condition
Min.
LM4040C
Reverse Breakdown Voltage
VR
Reverse Breakdown Voltage
IR = 100µA
Tolerance(6)
Typ.
5.000
IRMIN
Minimum Operating Current
54
ΔVR/ΔT
ΔVR/ΔIR
Average Reverse Breakdown
Voltage Temperature
Coefficient
IR = 10mA
IR = 1mA
IR = 100µA
Reverse Breakdown Voltage
Change with Operating Current
Change
IRMIN IR 1mA
1mA IR 15mA
±30
±20
±20
0.5
3.5
ZR Reverse Dynamic Impedance IR = 1mA, f = 120Hz, IAC = 0.1IR
eN Wideband Noise
IR = 100µA, 10Hz f 10kHz
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000hrs., T = 25°C ±0.1°C, IR = 100µA
0.5
80
120
Max.
±25
±58
74
80
±100
1.0
1.4
8.0
12.0
1.1
Units
V
mV
mV
µA
µA
ppm/°C
ppm/°C
ppm/°C
mV
mV
mV
mV
µVRMS
ppm
June 24, 2014
5
Revision 3.0


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LM4040 Shunt Voltage Reference


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