LM4040 Improved Precision Micropower Shunt Voltage
Reference with Multiple Reverse Breakdown Voltages
General Description Benefits and Features
The LM4040 is a precision, two-terminal shunt mode, Ultra-Small 3-Pin SC70 Package
bandgap voltage reference available in fixed reverse-
0.1% (max) Initial Accuracy
breakdown voltages of 2.048V, 2.500V, 3.000V, 3.3V,
100ppm/C (max) Temperature Coefficient
4.096V, and 5.000V. Ideal for space-critical applications,
Guaranteed Over -40C to +125C Temperature
the LM4040 is offered in the subminiature 3-pin SC70
Range
surface-mount package (1.8mm x 1.8mm), 50% smaller
than comparable devices in SOT23 surface-mount Wide Operating Current Range: 60A to 15mA
packages (SOT23 versions are also available).
Low 28V Output Noise (10Hz to 10kHz)
RMS
Laser-trimmed resistors ensure precise initial accuracy.
2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V
With a 100ppm/C temperature coefficient, the device
Fixed Reverse-Breakdown Voltages
is offered in four grades of initial accuracy ranging from
No Output Capacitors Required
0.1% to 1%. The LM4040 has a 60A to 15mA shunt
Tolerates Capacitive Loads
current capability with low dynamic impedance, ensuring
stable reverse breakdown voltage accuracy over a wide
range of operating temperatures and currents.
Ordering Information appears at end of data sheet.
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
-40C to +125C.
For a 1.225V output version, refer to the LM4041 data sheet.
Applications
Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Controls
19-1787; Rev 9; 1/16LM4040 Improved Precision Micropower Shunt Voltage
Reference with Multiple Reverse Breakdown Voltages
Absolute Maximum Ratings
Reverse Current (cathode to anode)..................................20mA Operating Temperature Range
Forward Current (anode to cathode) ..................................10mA LM4040_I_ _ _................................................ -40C to +85C
Continuous Power Dissipation (T = +70C) LM4040_E_ _ _ ............................................ -40C to +125C
A
3-Pin SC70 (derate 2.17mW/C above +70C) ...........174mW Storage Temperature Range ............................ -65C to +150C
3-Pin SOT23 (derate 4.01mW/C above +70C) ........320mW Junction Temperature ......................................................+150C
Lead Temperature (soldering, 10s) .................................+300C
Soldering Temperature (reflow) .......................................+260C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics2.048V
(I = 100A, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1)
R A MIN MAX A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LM4040A (0.1%) 2.046 2.048 2.050
LM4040B (0.2%) 2.044 2.048 2.052
Reverse Breakdown Voltage V T = +25C V
R A
LM4040C (0.5%) 2.038 2.048 2.058
LM4040D (1.0%) 2.028 2.048 2.068
LM4040A 2.0 15
LM4040B 4.0 17
Reverse Breakdown Voltage
V mV
R
Tolerance (Note 2)
LM4040C 10 23
LM4040D 20 41
LM4040A/B/C 45 65
Minimum Operating Current I A
RMIN
LM4040D 45 70
I = 10mA 20
R
Average Reverse Voltage
LM4040A/B/C 15 100
Temperature Coefficient V /T I = 1mA ppm/C
R R
LM4040D 15 150
(Notes 2 and 3)
I = 100A 15
R
LM4040A/B/C 0.3 1.0
I I 1mA
RMIN R
Reverse Breakdown Voltage
LM4040D 0.3 1.2
Change with Operating mV
LM4040A/B/C 2.5 8.0
Current Change
1mA I 15mA
R
LM4040D 2.5 10.0
LM4040A/B 0.3 0.8
Reverse Dynamic I = 1mA, f = 120Hz,
R
Z LM4040C 0.3 0.9
R
Impedance (Note 3) I = 0.1I
AC R
LM4040D 0.3 1.1
Wideband Noise e I = 100A, 10Hz f 10kHz 28 V
N R RMS
Reverse Breakdown Voltage
V T = 1000h 120 ppm
R
Long-Term Stability
Maxim Integrated 2
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