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LM4041AIM3-1.2+T-LM4041CEX3-1.2+T-LM4041CIM3-1.2+T-LM4041CIX3-1.2+T-LM4041CIX3-1.2-T Fast Delivery,Good Price
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LM4041AIM3-1.2+T |LM4041AIM312+TMAXIMN/a64461avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIX3-1.2-T |LM4041CIX312TN/a2116avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CEX3-1.2+T |LM4041CEX312+TMAXIMN/a519avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIM3-1.2+T |LM4041CIM312TMAXIMN/a1755avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIM3-1.2+T |LM4041CIM312TMAXN/a1700avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIX3-1.2+T |LM4041CIX312TMAXIMN/a4760avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIX3-1.2+T |LM4041CIX312TMAXN/a1800avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIX3-1.2-T |LM4041CIX312TMAXN/a1800avaiImproved Precision Micropower Shunt Voltage Reference
LM4041CIX3-1.2-T |LM4041CIX312TMAXIMN/a400avaiImproved Precision Micropower Shunt Voltage Reference
LM4041DIM3-1.2+T |LM4041DIM312+TMAXIMN/a11083avaiImproved Precision Micropower Shunt Voltage Reference


LM4041AIM3-1.2+T ,Improved Precision Micropower Shunt Voltage ReferenceELECTRICAL CHARACTERISTICS(I = 100µA, T = T to T , unless otherwise noted. Typical values are at T ..
LM4041AIM3X-1.2 ,Precision Micropower Shunt Voltage ReferenceLM4041 Precision Micropower Shunt Voltage ReferenceJanuary 2001LM4041Precision Micropower Shunt Vol ..
LM4041B12IDBZT ,1.2-V Precision Micropower Shunt Voltage Reference, 0.2% accuracyFEATURES • Applications• 1.225-V Fixed and Adjustable Outputs – Data-Acquisition Systems(1.225 V to ..
LM4041B12IDCKR ,1.2-V Precision Micropower Shunt Voltage Reference, 0.2% accuracySLCS146E–FEBRUARY 2005–REVISED FEBRUARY 2006Packaged in space-saving SC-70 and SOT-23-3 and requiri ..
LM4041B12IDCKRE4 , PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
LM4041B12IDCKT ,1.2-V Precision Micropower Shunt Voltage Reference, 0.2% accuracyFEATURES • Applications• 1.225-V Fixed and Adjustable Outputs – Data-Acquisition Systems(1.225 V to ..
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LM4041AIM3-1.2+T-LM4041CEX3-1.2+T-LM4041CIM3-1.2+T-LM4041CIX3-1.2+T-LM4041CIX3-1.2-T-LM4041DIM3-1.2+T
Improved Precision Micropower Shunt Voltage Reference
General Description
The LM4041 is a precision two-terminal shunt mode,
bandgap voltage reference with a fixed reverse break-
down voltage of 1.225V. Ideal for space-critical appli-
cations, the LM4041 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 LM4041 has a 60µA to 12mA shunt
current capability with low dynamic impedance, ensur-
ing stable reverse-breakdown voltage accuracy over a
wide range of operating temperatures and currents.
The LM4041 does not require an external stabilizing
capacitor while ensuring stability with any capacitive
load.
The LM4041 is guaranteed over the temperature range
-40°C to +125°C.
________________________Applications

Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Controls
Features
Ultra-Small 3-Pin SC70 Package0.1% (max) Initial Accuracy100ppm/°C (max) Temperature Coefficient
Guaranteed over -40°C to +125°C Temperature
Range
Wide Operating Current Range: 60µA to 12mALow 20µVRMSOutput Noise (10Hz to 10kHz)1.225V Fixed Reverse Breakdown VoltageNo Output Capacitors RequiredTolerates Capacitive Loads
LM4041
Improved Precision Micropower
Shunt Voltage Reference
Pin Configuration
Selector Guide

19-1704; Rev 2; 5/03
Ordering Information

*See Selector Guide for a listing of LM4041 Output Voltage,
Initial Accuracy, and Temperature Coefficient specifications.
LM4041
Improved Precision Micropower
Shunt Voltage Reference
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

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.
Reverse Current (cathode to anode)..................................20mA
Forward Current (anode to cathode)..................................10mA
ESD per Method 3015.7
Human Body Model.......................................................2000V
Machine Model.................................................................200V
Continuous Power Dissipation (TA= +70°C)
3-Pin SC70 (derate 2.17mW/°C above +70°C)............174mW
3-Pin SOT23 (derate 4.01mW/°C above +70°C)..........320mW
Operating Temperature Range
LM4041_I_ _ _..................................................-40°C to +85°C
LM4041_E_ _ _..............................................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s)................................+300°C
LM4041
Improved Precision Micropower
Shunt Voltage Reference
ELECTRICAL CHARACTERISTICS (continued)

Breakdown Voltage Tolerance ±[(∆VR/ ∆T)(max∆T)(VR)], where ∆VR/ ∆T is the VRtemperature coefficient, max∆T is the
maximum difference in temperature from the reference point of +25°C to TMINor TMAX, and VRis the reverse breakdown
voltage. The total overtemperature tolerance for the different grades in the temperature range where max∆T = +65°C is
shown below:
A grade: ±0.75% = ±0.1% ±100ppm/°C ✕65°C
B grade: ±0.85% = ±0.2% ±100ppm/°C ✕65°C
C grade: ±1.15% = ±0.5% ±100ppm/°C ✕65°C
D grade: ±1.98% = ±1.0% ±150ppm/°C ✕65°C
The total overtemperature tolerance for the different grades in the extended temperature range where max∆T = +100°C is
shown below:
A grade: ±1.1% = ±0.1% ±100ppm/°C ✕100°C
B grade: ±1.2% = ±0.2% ±100ppm/°C ✕100°C
C grade: ±1.5% = ±0.5% ±100ppm/°C ✕100°C
D grade: ±2.5% = ±1.0% ±150ppm/°C ✕100°C
Therefore, as an example, the A-grade LM4041-1.2 has an overtemperature reverse breakdown voltage tolerance of ±2.5V
x 0.75% = ±19mV.
Note 3:
Guaranteed by design.
TEMPERATURE DRIFT

LM4041 toc02
TEMPERATURE (°C)
REFERENCE VOLTAGE CHANGE (mV)
REVERSE VOLTAGE vs. CURRENT
LM4041 toc03
SOURCE CURRENT (mA)
REVERSE VOLTAGE CHANGE (mV)105
Typical Operating Characteristics
(IR= 100µA, SC70-3 package, TA= +25°C, unless otherwise noted.)
LM4041
Improved Precision Micropower
Shunt Voltage Reference

10010k1k100k1M
OUTPUT IMPEDANCE vs. FREQUENCY

LM4041-08
FREQUENCY (Hz)
IMPEDANCE (
10,000
1001k10k
FREQUENCY (Hz)
NOISE vs. FREQUENCY
LM4041-09
NOISE (nV/
Hz)41216
STARTUP CHARACTERISTICS

LM4041-07
RESPONSE TIME (µs)
VIN
1.5V
1.0V
VOUT
O.5V
GEN
(AC-COUPLED)
2V/div
2mV/div
LOAD-TRANSIENT RESPONSE

LM4041-05
10µs/div
GEN
2V/div
2mV/div
LOAD-TRANSIENT RESPONSE

LM4041-06
10µs/div
GEN
(AC-COUPLED)
2V/div
2mV/div
LOAD-TRANSIENT RESPONSE

LM4041-04
10µs/divypical Operating Characteristics (continued)
(IR= 100µA, SC70-3 package, TA= +25°C, unless otherwise noted.)
Detailed Description
The LM4041 shunt references use the bandgap princi-
ple to produce a stable, accurate voltage. The device
behaves similarly to an ideal zener diode; a fixed volt-
age of +1.225V is maintained across its output termi-
nals when biased with 60µA to 12mA of reverse
current. The LM4041 behaves similarly to a silicon
diode when biased with forward currents up 10mA.
Figure 3 shows a typical operating circuit. The LM4041
is ideal for providing a stable reference from a high-
voltage power supply.
Applications Information

The LM4041’s internal pass transistor is used to main-
tain a constant output voltage (VSHUNT) by sinking the
necessary amount of current across a source resistor.
The source resistance (RS) is determined from the load
current (ILOAD) range, supply voltage (VS) variations,
VSHUNT, and desired quiescent current.
Choose the value of RSwhen VSis at a minimum and
ILOADis at a maximum. Maintain a minimum ISHUNTof
60µA at all times. The RSvalue should be large enough
to keep ISHUNTless than 12mA for proper regulation
when VSis maximum and ILOADis at a minimum. To
prevent damage to the device, ISHUNTshould never
exceed 20mA.
Therefore, the value of RSis bounded by the following
equation:
[VS(MIN)- VR] / [60µA + ILOAD(MAX)] > RS>
[VS(MAX)- VR] / [20mA + ILOAD(MIN)]
Choosing a larger resistance minimizes the total power
dissipation in the circuit by reducing the shunt current
(PD(TOTAL)= VS✕ISHUNT). Provide a safety margin to
incorporate the worst-case tolerance of the resistor
used. Ensure that the resistor’s power rating is ade-
quate, using the following general power equation:= ISHUNT✕(VS(MAX)- VR)
Output Capacitance

The LM4041 does not require an external capacitor for
frequency stability and is stable for any output capaci-
tance.
Temperature Performance

The LM4041 typically exhibits an output voltage tem-
perature coefficient within ±15ppm/°C. The polarity of
the temperature coefficient may be different from one
device to another; some may have positive coefficients,
and others may have negative coefficients.
LM4041
Improved Precision Micropower
Shunt Voltage Reference
Pin Description
LM4041
Improved Precision Micropower
Shunt Voltage Reference
Chip Information

TRANSISTOR COUNT: 60
PROCESS: BiCMOS
High Temperature Operation

The maximum junction temperature of the LM4041 is
+150°C. The maximum operating temperature for the
LM4041_E_ is +125°C. At a maximum load current of
15mA and a maximum output voltage of 5V, the part
will dissipate 75mW of power. The power dissipation
limits of the 3-pin SC70 call for a derating value of
2.17mW/°C above +70°C and thus for 75mW of power
dissipation, the part will selfheat to 35.56°C above
ambient temperature. If the ambient temperature is
+125°C, the part operates at 159.56°C, thereby
exceeding the maximum junction temperature value of
+150°C. For high-temperature operation, care must be
taken to ensure the combination of ambient tempera-
ture, output power dissipation, and package thermal
resistance does not conspire to raise the device tem-
perature beyond that listed in the Absolute Maximum
Ratings. Either reduce the output load current or the
ambient temperature to keep the part within the limits.
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