LM4040

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MAXIM(美信)
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LM4040 - Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Volta...

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LM4040 数据手册

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 applications, the LM4040 is offered in the subminiature 3-pin SC70 surface-mount package (1.8mm 1.8mm), 50% smaller than comparable devices in SOT23 surfacemount 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, ensuring 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. 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 28µVRMS 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 Features LM4040 Selector Guide PART LM4040_IM3-2.1+T LM4040_IX3-2.1+T LM4040_EM3-2.1+T LM4040_EX3-2.1+T LM4040_IM3-2.5+T LM4040_IX3-2.5+T LM4040_IM3-2.5/V+T LM4040_EM3-2.5+T LM4040_EM3-2.5/V+T LM4040_EX3-2.5+T LM4040_IM3-3.0+T TEMP RANGE -40°C to +85°C -40°C to +85°C OUTPUT PINVOLTAGE PACKAGE (V) 3 SOT23 3 SC70 2.048 2.048 2.048 2.048 2.500 2.500 2.500 2.500 2.500 2.500 3.000 3.000 3.000 3.300 4.096 4.096 4.096 4.096 4.096 5.000 5.000 5.000 5.000 5.000 -40°C to +125°C 3 SOT23 -40°C to +125°C 3 SC70 -40°C to +85°C -40°C to +85°C -40°C to +85°C 3 SOT23 3 SC70 3 SC70 ________________________Applications Portable, Battery-Powered Equipment Notebook Computers Cell Phones Industrial Process Controls -40°C to +125°C 3 SOT23 -40°C to +125°C 3 SOT23 -40°C to +125°C 3 SC70 -40°C to +85°C -40°C to +85°C 3 SOT23 3 SC70 Pin Configuration TOP VIEW + + 1 LM4040_IX3-3.0+T LM4040_EX3-3.0+T LM4040_EX3-3.3+T LM4040_IM3-4.1+T LM4040_IX3-4.1+T LM4040_EM3-4.1 LM4040_EM3-4.1/V+T LM4040_EX3-4.1+T LM4040_IM3-5.0+T LM4040_IX3-5.0+T LM4040_EM3-5.0+T LM4040_EX3-5.0+T -40°C to +125°C 3 SC70 -40°C to +125°C 3 SC70 -40°C to +85°C -40°C to +85°C 3 SOT23 3 SC70 LM4040 -2 3 N.C.* -40°C to +125°C 3 SOT23 -40°C to +125°C 3 SOT23 -40°C to +125°C 3 SC70 -40°C to +85°C -40°C to +85°C 3 SOT23 3 SC70 SC70-3/SOT23-3 *PIN 3 MUST BE LEFT UNCONNECTED OR CONNECTED TO PIN 2. -40°C to +125°C 3 SOT23 -40°C to +125°C 3 SC70 LM4040_EM3-5.0/V+T -40°C to +125°C 3 SOT23 Ordering Information appears at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. 1 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ABSOLUTE MAXIMUM RATINGS Reverse Current (cathode to anode) ..................................20mA Forward Current (anode to cathode) ..................................10mA 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 LM4040_I_ _ _..................................................-40°C to +85°C LM4040_E_ _ _ ..............................................-40°C to +125°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s)..................................+300°C Soldering Temperature (reflow) .......................................+260°C 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 CHARACTERISTICS—2.048V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage VR TA = +25°C LM4040B (0.2%) LM4040C (0.5%) LM4040D (1.0%) LM4040A Reverse Breakdown Voltage Tolerance (Note 2) VR LM4040B LM4040C LM4040D Minimum Operating Current IRMIN LM4040A/B/C LM4040D IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) ∆VR/∆T IR = 1mA IR = 100µA Reverse Breakdown Voltage Change with Operating Current Change IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR LM4040C LM4040D LM4040A/B/C LM4040D MIN 2.046 2.044 2.038 2.028 TYP 2.048 2.048 2.048 2.048 ±2.0 ±4.0 ±10 ±20 45 45 ±20 ±15 ±15 ±15 0.3 0.3 2.5 2.5 0.3 0.3 0.3 28 120 1.0 1.2 8.0 10.0 0.8 0.9 1.1 µVRMS ppm Ω mV ±100 ±150 ppm/°C MAX 2.050 2.052 2.058 2.068 ±15 ±17 ±23 ±41 65 70 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h 2 _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ELECTRICAL CHARACTERISTICS—2.500V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage VR TA = +25°C LM4040B (0.2%) LM4040C (0.5%) LM4040D (1.0%) LM4040A Reverse Breakdown Voltage Tolerance (Note 2) VR LM4040B LM4040C LM4040D Minimum Operating Current IRMIN LM4040A/B/C LM4040D IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) ∆VR/∆T IR = 1mA IR = 100µA Reverse Breakdown Voltage Change with Operating Current Change IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR LM4040C LM4040D LM4040A/B/C LM4040D MIN 2.4975 2.4950 2.4875 2.4750 TYP 2.5000 2.5000 2.5000 2.5000 ±2.0 ±4.0 ±10 ±20 45 45 ±20 ±15 ±15 ±15 0.3 0.4 2.5 2.5 0.3 0.3 0.3 35 120 1.0 1.2 8.0 10.0 0.8 0.9 1.1 µVRMS ppm Ω mV ±100 ±150 ppm/°C MAX 2.5025 2.5050 2.5125 2.5250 ±19 ±21 ±29 ±49 65 70 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h _______________________________________________________________________________________ 3 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ELECTRICAL CHARACTERISTICS—3.000V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage VR TA = +25°C LM4040B (0.2%) LM4040C (0.5%) LM4040D (1.0%) LM4040A Reverse Breakdown Voltage Tolerance (Note 2) VR LM4040B LM4040C LM4040D Minimum Operating Current IRMIN LM4040A/B/C LM4040D IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) ∆VR/∆T IR = 1mA IR = 100µA Reverse Breakdown Voltage Change with Operating Current Change IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR LM4040C LM4040D LM4040A/B/C LM4040D MIN 2.997 2.994 2.985 2.970 TYP 3.000 3.000 3.000 3.000 ±3.0 ±6.0 ±15 ±30 45 45 ±20 ±15 ±15 ±15 0.3 0.3 2.5 2.5 0.3 0.3 0.3 45 120 1.0 1.2 8.0 10.0 0.8 0.9 1.1 µVRMS ppm Ω mV ±100 ±150 ppm/°C MAX 3.003 3.006 3.015 3.030 ±22 ±26 ±34 ±59 67 70 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h 4 _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages ELECTRICAL CHARACTERISTICS—3.300V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage VR TA = +25°C LM4040B (0.2%) LM4040C (0.5%) LM4040D (1.0%) LM4040A Reverse Breakdown Voltage Tolerance (Note 2) VR LM4040B LM4040C LM4040D Minimum Operating Current IRMIN LM4040A/B/C LM4040D IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) ∆VR/∆T IR = 1mA IR = 100µA Reverse Breakdown Voltage Change with Operating Current Change IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR LM4040C LM4040D LM4040A/B/C LM4040D MIN 3.2967 3.2934 3.2835 3.2670 TYP 3.3000 3.3000 3.3000 3.3000 ±3.0 ±6.0 ±15 ±30 45 45 ±20 ±15 ±15 ±15 0.3 0.3 2.5 2.5 0.3 0.3 0.3 50 120 1.0 1.2 8.0 10.0 0.8 0.9 1.1 µVRMS ppm Ω mV ±100 ±150 ppm/°C MAX 3.3033 3.3066 3.3165 3.3330 ±22 ±26 ±34 ±59 67 70 µA mV V UNITS LM4040 IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h _______________________________________________________________________________________ 5 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ELECTRICAL CHARACTERISTICS—4.096V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage VR TA = +25°C LM4040B (0.2%) LM4040C (0.5%) LM4040D (1.0%) LM4040A Reverse Breakdown Voltage Tolerance (Note 2) VR LM4040B LM4040C LM4040D Minimum Operating Current IRMIN LM4040A/B/C LM4040D IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) ∆VR/∆T IR = 1mA IR = 100µA Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA ZR eN ∆VR IR = 1mA, f = 120Hz, IAC = 0.1IR LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B/C LM4040D MIN 4.092 4.088 4.076 4.055 TYP 4.096 4.096 4.096 4.096 ±4.1 ±8.2 ±20 ±41 50 50 ±30 ±20 ±20 ±15 0.5 0.5 3.0 3.0 0.5 0.5 64 120 1.2 1.5 10.0 13.0 1.0 1.3 Ω µVRMS ppm mV ±100 ±150 ppm/°C MAX 4.100 4.104 4.116 4.137 ±31 ±35 ±47 ±81 73 78 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h 6 _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages ELECTRICAL CHARACTERISTICS—5.000V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage VR TA = +25°C LM4040B (0.2%) LM4040C (0.5%) LM4040D (1.0%) LM4040A Reverse Breakdown Voltage Tolerance (Note 2) VR LM4040B LM4040C LM4040D Minimum Operating Current IRMIN LM4040A/B/C LM4040D IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) ∆VR/∆T IR = 1mA IR = 100µA Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA ZR eN ∆VR IR = 1mA, f = 120Hz, IAC = 0.1IR LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B/C LM4040D LM4040A/B/C LM4040D MIN 4.995 4.990 4.975 4.950 TYP 5.000 5.000 5.000 5.000 ±5.0 ±10 ±25 ±50 54 54 ±30 ±20 ±20 ±15 0.5 0.5 3.5 3.5 0.5 0.5 80 120 1.4 1.8 12.0 15.0 1.1 1.5 Ω µVRMS ppm mV ±100 ±150 ppm/°C MAX 5.005 5.010 5.025 5.050 ±38 ±43 ±58 ±99 80 85 µA mV V UNITS LM4040 IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h Note 1: All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified. Note 2: The overtemperature limit for Reverse Breakdown Voltage Tolerance is defined as the room-temperature Reverse Breakdown Voltage Tolerance ±[(∆VR/∆T)(max∆T)(VR)], where ∆VR/∆T is the VR temperature coefficient, max∆T is the maximum difference in temperature from the reference point of +25°C to TMIN or TMAX, and VR is 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 over-temperature 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 LM4040-2.5 has an over-temperature reverse breakdown voltage tolerance of ±2.5V 0.75% = ±19mV. Note 3: Guaranteed by design. _______________________________________________________________________________________ 7 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 Typical Operating Characteristics (IR = 100µA, SC70-3 package, TA = +25°C, unless otherwise noted.) REVERSE CHARACTERISTICS AND MINIMUM OPERATING CURRENT LM4040-01 LM4040-2.5V TEMPERATURE DRIFT LM4040-02 LM4040-5.0V TEMPERATURE DRIFT REFERENCE VOLTAGE CHANGE (mV) LM4040 toc03 6 5 REVERSE VOLTAGE (V) 4 LM4040_I_3-4.1 LM4040_I_3-5.0 1 REFERENCE VOLTAGE CHANGE (mV) 0 -1 -2 -3 -4 -5 5 0 LM4040_I_3-3.0 3 2 LM4040_I_3-2.5 1 0 0 50 REVERSE CURRENT (µA) 100 LM4040_I_3-2.1 -5 -10 -15 -20 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) LM4040-2.5V REVERSE VOLTAGE vs. ISHUNT LM4040-04 LM4040-5.0V REVERSE VOLTAGE vs. ISHUNT LM4040 toc05 5 TA = +125°C REVERSE VOLTAGE CHANGE (mV) 4 TA = -40°C 6 REVERSE VOLTAGE CHANGE (mV) 5 4 3 2 1 TA = +25°C 0 TA = +85°C TA = -40°C 3 TA = +25°C TA = +85°C TA = +125°C 2 1 0 0 5 10 ISHUNT (mA) 15 20 0 5 10 ISHUNT (mA) 15 20 8 _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 Typical Operating Characteristics (continued) (IR = 100µA, SC70 package, TA = +25°C, unless otherwise noted.) LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-06 LM4040-5.0V LOAD-TRANSIENT RESPONSE LM4040-07 LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-08 +25µA VGEN VGEN +25µA VGEN +250µA -25µA VR AC-COUPLED VR AC-COUPLED -25µA VR AC-COUPLED -250µA 2mV/div 10mV/div 10mV/div 10µs/div CH1: VGEN 2V/div CH2: VR AC-COUPLED 2mV/div ISHUNT = 100µA ± 25µA, RL = 100kΩ, SEE FIGURE 1 40µs/div ISHUNT = 100µA ± 25µA RL = 100kΩ, SEE FIGURE 1 10µs/div ISHUNT = 1mA ± 250µA RL = 10kΩ, SEE FIGURE 1 LM4040-5.0V LOAD-TRANSIENT RESPONSE LM4040-09 LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-10 LM4040-5.0V LOAD-TRANSIENT RESPONSE LM4040-11 +250µA VGEN VGEN +2.5mA VGEN +2.5mA -250µA VR AC-COUPLED VR AC-COUPLED -2.5mA VR AC-COUPLED -2.5mA 10mV/div 20mV/div 20mV/div 10µs/div ISHUNT = 1mA ± 250µA RL = 10kΩ, SEE FIGURE 1 10µs/div ISHUNT = 10mA ± 2.5mA RL = 1kΩ, SEE FIGURE 1 10µs/div ISHUNT = 10mA ± 2.5mA RL = 1kΩ, SEE FIGURE 1 ISHUNT 1kΩ RL VR VGEN VB + - Figure 1. Load-Transient Test Circuit _______________________________________________________________________________________ 9 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 Typical Operating Characteristics (continued) (IR = 100µA, SC70 package, TA = +25°C, unless otherwise noted.) LM4040-2.5V STARTUP CHARACTERISTICS LM4040-12 LM4040-5.0V STARTUP CHARACTERISTICS LM4040-13 LM4040-2.5V OUTPUT IMPEDANCE vs. FREQUENCY LM4040-14 1000 C1 = 1 µ F 5V VIN 0V VIN 5V 0V IMPEDANCE (Ω) 100 IR = 150µA 2V VOUT 1V 0V RS = 30kΩ SEE FIGURE 2 0 4 8 12 16 20 24 28 32 36 RESPONSE TIME (µs) VOUT 4V 2V 0V RS = 16kΩ SEE FIGURE 2 0 10 20 30 40 50 60 70 80 90 RESPONSE TIME (µs) 10 C1 = 0 1 IR = 1mA 0.1 0.1k 1k 10k FREQUENCY (Hz) 100k 1M LM4040-5.0V OUTPUT IMPEDANCE vs. FREQUENCY LM4040-15 LM4040-2.5V NOISE vs. FREQUENCY LM4040-16 LM4040-5.0V NOISE vs. FREQUENCY LM4040-17 100 C1 = 0 10,000 10,000 IMPEDANCE (Ω) NOISE (nV/√Hz) 1000 NOISE (nV/√Hz) 1 10 100 FREQUENCY (Hz) 1k 10k 10 IR = 150µA 1000 1 IR = 1mA C1 = 1 µ F 0.1 0.1k 1k 10k FREQUENCY (Hz) 100k 1M 100 100 1 10 100 FREQUENCY (Hz) 1k 10k RS VIN 1Hz RATE 50% DUTY CYCLE VR Figure 2. Startup Characteristics Test Circuit 10 ______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Pin Description PIN 1 2 3 NAME + − N.C. Positive Terminal of the Shunt Reference Negative Terminal of the Shunt Reference No connection. Leave this pin unconnected or connected to pin 2. FUNCTION LM4040 Detailed Description The LM4040 shunt references use the bandgap principle to produce a stable, accurate voltage. The device behaves similarly to an ideal zener diode; a fixed voltage is maintained across its output terminals when biased with 60µA to 15mA of reverse current. The LM4040 behaves similarly to a silicon diode when biased with forward currents up 10mA. Figure 3 shows a typical operating circuit. The LM4040 is ideal for providing a stable reference from a highvoltage power supply. VS ISHUNT + ILOAD RS ILOAD VR ISHUNT LM4040 Applications Information The LM4040’s internal pass transistor is used to maintain 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 RS when VS is at a minimum and ILOAD is at a maximum. Maintain a minimum ISHUNT of 60µA at all times. The RS value should be large enough to keep ISHUNT less than 15mA for proper regulation when VS is maximum and ILOAD is at a minimum. To prevent damage to the device, ISHUNT should never exceed 20mA. Therefore, the value of RS is 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 adequate, using the following general power equation: PDR = ISHUNT (VS(MAX) - VSHUNT) Figure 3. Typical Operating Circuit Temperature Performance The LM4040 typically exhibits an output voltage temperature 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. High Temperature Operation The maximum junction temperature of the LM4040 is +150°C. The maximum operating temperature for the LM4040_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 temperature, output power dissipation and package thermal resistance does not conspire to raise the device temperature 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. Output Capacitance The LM4040 does not require an external capacitor for frequency stability and is stable for any output capacitance. ______________________________________________________________________________________ 11 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 Ordering Information PART LM4040AIM3-2.1+T LM4040AIX3-2.1+T LM4040BIM3-2.1+T LM4040BIX3-2.1+T LM4040CIM3-2.1+T LM4040CIX3-2.1+T LM4040DIM3-2.1+T LM4040DIX3-2.1+T LM4040AEM3-2.1+T LM4040AEX3-2.1+T LM4040BEM3-2.1-T LM4040BEX3-2.1-T LM4040CEM3-2.1-T LM4040CEX3-2.1+T LM4040DEM3-2.1+T LM4040DEX3-2.1+T LM4040AIM3-2.5+T LM4040AIX3-2.5+T LM4040BIM3-2.5+T LM4040BIM3-2.5/V+T LM4040BIX3-2.5+T LM4040CIM3-2.5+T LM4040CIX3-2.5+T LM4040DIM3-2.5+T LM4040DIX3-2.5+T LM4040AEM3-2.5+T LM4040AEX3-2.5+T LM4040BEM3-2.5+T LM4040BEX3-2.5+T LM4040CEM3-2.5+T LM4040CEM3-2.5/V+T LM4040CEX3-2.5+T LM4040DEM3-2.5+T LM4040DEX3-2.5+T OUTPUT VOLTAGE (V) 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.048 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 2.500 INITIAL ACCURACY (%) 0.1 0.1 0.2 0.2 0.5 0.5 1.0 1.0 0.1 0.1 0.2 0.2 0.5 0.5 1.0 1.0 0.1 0.1 0.2 0.2 0.2 0.5 0.5 1.0 1.0 0.1 0.1 0.2 0.2 0.5 0.5 0.5 1.0 1.0 TEMPCO (ppm/°C) 100 100 100 100 100 100 150 150 100 100 100 100 100 100 150 150 100 100 100 100 100 100 100 150 150 100 100 100 100 100 100 100 150 150 TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +125°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PIN-PACKAGE 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 TOP MARK FZEF ABJ FZEG ABK FZEH ABL FZEI ABM FZNG ALF FZNH ALG FZNI ALH FZNJ ALI FZEJ ABN FZEK FZWL ABO FZEL ABP FZEM ABQ FZNK ALJ FZNL ALK FZNM FZVZ ALL FZNN ALM +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. 12 ______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Ordering Information (continued) PART LM4040AIM3-3.0+T LM4040AIX3-3.0+T LM4040BIM3-3.0+T LM4040BIX3-3.0+T LM4040CIM3-3.0+T LM4040CIX3-3.0+T LM4040DIM3-3.0+T LM4040DIX3-3.0+T LM4040AEM3-3.0+T LM4040AEX3-3.0+T LM4040BEM3-3.0+T LM4040BEX3-3.0+T LM4040CEX3-3.0+T LM4040DEM3-3.0+T LM4040DEX3-3.0+T LM4040AEX3-3.3+T LM4040BEX3-3.3+T LM4040CEX3-3.3+T LM4040DEX3-3.3+T LM4040AIM3-4.1+T LM4040AIX3-4.1+T LM4040BIM3-4.1+T LM4040BIX3-4.1+T LM4040CIM3-4.1+T LM4040CIX3-4.1+T LM4040DIM3-4.1+T LM4040DIX3-4.1+T LM4040AEM3-4.1+T LM4040AEX3-4.1+T LM4040BEM3-4.1+T LM4040BEX3-4.1+T LM4040CEM3-4.1+T OUTPUT VOLTAGE (V) 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.000 3.300 3.300 3.300 3.300 4.096 4.096 4.096 4.096 4.096 4.096 4.096 4.096 4.096 4.096 4.096 4.096 4.096 INITIAL ACCURACY (%) 0.1 0.1 0.2 0.2 0.5 0.5 1.0 1.0 0.1 0.1 0.2 0.2 0.5 1.0 1.0 0.1 0.2 0.5 1.0 0.1 0.1 0.2 0.2 0.5 0.5 1.0 1.0 0.1 0.1 0.2 0.2 0.5 TEMPCO (ppm/°C) 100 100 100 100 100 100 150 150 100 100 100 100 100 150 150 100 100 100 150 100 100 100 100 100 100 150 150 100 100 100 100 100 TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PIN-PACKAGE 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SC70 3 SOT23 3 SC70 3 SC70 3 SC70 3 SC70 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 TOP MARK FZEN ABR FZEO ABS FZEP ABT FZEQ ABU FZNO ALN FZNP ALO ALP FZNR ALQ ANY ANZ AOA AOB FZER ABV FZES ABW FZET ABX FZEU ABY FZNS ALR FZNT ALS FZNU LM4040 +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. ______________________________________________________________________________________ 13 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 Ordering Information (continued) PART LM4040CEX3-4.1+T LM4040DEM3-4.1+T LM4040DEM3-4.1/V+T LM4040DEX3-4.1+T LM4040AIM3-5.0+T LM4040AIX3-5.0+T LM4040BIM3-5.0+T LM4040BIX3-5.0+T LM4040CIM3-5.0+T LM4040CIX3-5.0+T LM4040DIM3-5.0+T LM4040DIX3-5.0+T LM4040AEM3-5.0+T LM4040AEM3-5.0/V+T LM4040AEX3-5.0+T LM4040BEM3-5.0+T LM4040BEX3-5.0+T LM4040CEM3-5.0+T LM4040CEM3-5.0/V+T LM4040CEX3-5.0+T LM4040DEM3-5.0+T OUTPUT VOLTAGE (V) 4.096 4.096 4.096 4.096 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 5.000 INITIAL ACCURACY (%) 0.5 1.0 1.0 1.0 0.1 0.1 0.2 0.2 0.5 0.5 1.0 1.0 0.1 0.1 0.1 0.2 0.2 0.5 0.5 0.5 1.0 TEMPCO (ppm/°C) 100 150 150 150 100 100 100 100 100 100 150 150 100 100 100 100 100 100 100 100 150 150 TEMP RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PIN-PACKAGE 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 TOP MARK ALT FZNV FZWA ALU FZEV ABZ FZEW ACA FZEX ACB FZEY ACC FZNW FZWB ALV FZNX ALW FZNY +FZWC ALX FZNZ ALY LM4040DEX3-5.0+T 5.000 1.0 +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Chip Information PROCESS: BiCMOS Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE 3 SOT23 3 SC70 PACKAGE CODE U3+1 X3+2 OUTLINE NO. 21-0051 21-0075 LAND PATTERN NO. 90-0179 90-0208 14 ______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Revision History REVISION NUMBER 0 5 6 7 REVISION DATE 8/00 7/05 4/11 11/11 Initial release Updated Electrical Characteristics. Updated Selector Guide, Absolute Maximum Ratings, and Ordering Information. Add /V+ automotive-qualified identification to the Selector Guide and Ordering Information. DESCRIPTION PAGES CHANGED — 2–7 1, 2, 12, 13, 14 1, 12 LM4040 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 15 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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