LM4040 Datasheet, PDF (1/15 Pages) National Semiconductor (TI) – Precision Micropower Shunt Voltage Reference

19-1787; Rev 7; 11/11
Improved Precision Micropower Shunt Voltage
Reference with Multiple Reverse Breakdown Voltages
General Description
The LM4040 is a precision two-terminal shunt mode,
bandgap voltage reference available in fixed reverse
breakdown voltages of 2.048V, 2.500V, 3.000V, 3.3V,
4.096V, and 5.000V. Ideal for space-critical applica-
tions, the LM4040 is offered in the subminiature 3-pin
SC70 surface-mount package (1.8mm  1.8mm), 50%
smaller than comparable devices in SOT23 surface-
mount packages (SOT23 versions are also available).
Laser-trimmed resistors ensure precise initial accuracy.
With a 100ppm/°C temperature coefficient, the device
is offered in four grades of initial accuracy ranging from
0.1% to 1%. The LM4040 has a 60µA to 15mA shunt
current capability with low dynamic impedance, ensur-
ing stable reverse breakdown voltage accuracy over a
wide range of operating temperatures and currents.
The LM4040 does not require an external stabilizing
capacitor while ensuring stability with any capacitive
load.
The LM4040 is guaranteed over the temperature range
of -40°C to +125°C.
For a 1.225V output version, refer to the LM4041 data
sheet.
________________________Applications
Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Controls
TOP VIEW
Pin Configuration
+
+1
LM4040
-2
3 N.C.*
SC70-3/SOT23-3
*PIN 3 MUST BE LEFT UNCONNECTED
OR CONNECTED TO PIN 2.
Ordering Information appears at end of data sheet.
Features
o Ultra-Small 3-Pin SC70 Package
o 0.1% (max) Initial Accuracy
o 100ppm/°C (max) Temperature Coefficient
Guaranteed over -40°C to +125°C Temperature
Range
o Wide Operating Current Range: 60µA to 15mA
o Low 28µV_RMS Output Noise (10Hz to 10kHz)
o 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V
Fixed Reverse Breakdown Voltages
o No Output Capacitors Required
o Tolerates Capacitive Loads
Selector Guide
PART
TEMP RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)
LM4040_IM3-2.1+T -40°C to +85°C 3 SOT23 2.048
LM4040_IX3-2.1+T
-40°C to +85°C 3 SC70
2.048
LM4040_EM3-2.1+T -40°C to +125°C 3 SOT23 2.048
LM4040_EX3-2.1+T -40°C to +125°C 3 SC70
2.048
LM4040_IM3-2.5+T -40°C to +85°C 3 SOT23 2.500
LM4040_IX3-2.5+T
-40°C to +85°C 3 SC70
2.500
LM4040_IM3-2.5/V+T -40°C to +85°C 3 SC70
2.500
LM4040_EM3-2.5+T -40°C to +125°C 3 SOT23 2.500
LM4040_EM3-2.5/V+T -40°C to +125°C 3 SOT23 2.500
LM4040_EX3-2.5+T -40°C to +125°C 3 SC70
2.500
LM4040_IM3-3.0+T -40°C to +85°C 3 SOT23 3.000
LM4040_IX3-3.0+T
-40°C to +85°C 3 SC70
3.000
LM4040_EX3-3.0+T -40°C to +125°C 3 SC70
3.000
LM4040_EX3-3.3+T -40°C to +125°C 3 SC70
3.300
LM4040_IM3-4.1+T -40°C to +85°C 3 SOT23 4.096
LM4040_IX3-4.1+T
-40°C to +85°C 3 SC70
4.096
LM4040_EM3-4.1 -40°C to +125°C 3 SOT23 4.096
LM4040_EM3-4.1/V+T -40°C to +125°C 3 SOT23 4.096
LM4040_EX3-4.1+T -40°C to +125°C 3 SC70
4.096
LM4040_IM3-5.0+T -40°C to +85°C 3 SOT23 5.000
LM4040_IX3-5.0+T -40°C to +85°C 3 SC70
5.000
LM4040_EM3-5.0+T -40°C to +125°C 3 SOT23 5.000
LM4040_EM3-5.0/V+T -40°C to +125°C 3 SOT23 5.000
LM4040_EX3-5.0+T -40°C to +125°C 3 SC70
5.000
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
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