19-1787; Rev 7; 11/11 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 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 60A 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. Features o Ultra-Small 3-Pin SC70 Package o 0.1% (max) Initial Accuracy o 100ppm/C (max) Temperature Coefficient Guaranteed over -40C to +125C Temperature Range o Wide Operating Current Range: 60A to 15mA o Low 28VRMS 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 OUTPUT PINVOLTAGE PACKAGE (V) The LM4040 is guaranteed over the temperature range of -40C to +125C. For a 1.225V output version, refer to the LM4041 data sheet. LM4040_IM3-2.1+T -40C to +85C 3 SOT23 2.048 LM4040_IX3-2.1+T -40C to +85C 3 SC70 2.048 LM4040_EM3-2.1+T -40C to +125C 3 SOT23 2.048 ________________________Applications LM4040_EX3-2.1+T -40C to +125C 3 SC70 2.048 Portable, Battery-Powered Equipment LM4040_IM3-2.5+T -40C to +85C 3 SOT23 2.500 Notebook Computers LM4040_IX3-2.5+T -40C to +85C 3 SC70 2.500 LM4040_IM3-2.5/V+T -40C to +85C 3 SC70 2.500 LM4040_EM3-2.5+T -40C to +125C 3 SOT23 LM4040_EM3-2.5/V+T -40C to +125C 3 SOT23 2.500 LM4040_EX3-2.5+T -40C to +125C 3 SC70 2.500 LM4040_IM3-3.0+T -40C to +85C 3 SOT23 3.000 LM4040_IX3-3.0+T -40C to +85C 3 SC70 3.000 LM4040_EX3-3.0+T -40C to +125C 3 SC70 3.000 LM4040_EX3-3.3+T -40C to +125C 3 SC70 3.300 LM4040_IM3-4.1+T -40C to +85C 3 SOT23 4.096 LM4040_IX3-4.1+T -40C to +85C 3 SC70 4.096 Cell Phones Industrial Process Controls Pin Configuration TOP VIEW + + 1 LM4040 3 N.C.* - 2 SC70-3/SOT23-3 *PIN 3 MUST BE LEFT UNCONNECTED OR CONNECTED TO PIN 2. Ordering Information appears at end of data sheet. 2.500 LM4040_EM3-4.1 -40C to +125C 3 SOT23 4.096 LM4040_EM3-4.1/V+T -40C to +125C 3 SOT23 4.096 LM4040_EX3-4.1+T -40C to +125C 3 SC70 4.096 LM4040_IM3-5.0+T -40C to +85C 3 SOT23 5.000 LM4040_IX3-5.0+T -40C to +85C 3 SC70 5.000 LM4040_EM3-5.0+T -40C to +125C 3 SOT23 5.000 LM4040_EM3-5.0/V+T -40C to +125C 3 SOT23 5.000 LM4040_EX3-5.0+T 5.000 -40C to +125C 3 SC70 +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. ________________________________________________________________ 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. 1 LM4040 General Description LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages ABSOLUTE MAXIMUM RATINGS Reverse Current (cathode to anode) ..................................20mA Forward Current (anode to cathode) ..................................10mA Continuous Power Dissipation (TA = +70C) 3-Pin SC70 (derate 2.17mW/C above +70C) ............174mW 3-Pin SOT23 (derate 4.01mW/C above +70C)..........320mW Operating Temperature Range LM4040_I_ _ _..................................................-40C to +85C LM4040_E_ _ _ ..............................................-40C to +125C Storage Temperature Range .............................-65C to +150C 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 CHARACTERISTICS--2.048V (IR = 100A, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current SYMBOL VR VR IRMIN CONDITIONS MIN TYP MAX LM4040A (0.1%) 2.046 2.048 2.050 LM4040B (0.2%) 2.044 2.048 2.052 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 LM4040C 10 23 LM4040D 20 41 LM4040A/B/C 45 65 LM4040D 45 70 TA = +25C VR/T IR = 1mA LM4040A/B/C 15 100 LM4040D 15 150 IRMIN IR 1mA Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability 2 1mA IR 15mA ZR eN VR IR = 1mA, f = 120Hz, IAC = 0.1IR mV A ppm/C 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change V 20 IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) UNITS LM4040A/B/C 0.3 1.0 LM4040D 0.3 1.2 LM4040A/B/C 2.5 8.0 LM4040D 2.5 10.0 LM4040A/B 0.3 0.8 LM4040C 0.3 0.9 LM4040D 0.3 1.1 mV IR = 100A, 10Hz f 10kHz 28 VRMS T = 1000h 120 ppm _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ELECTRICAL CHARACTERISTICS--2.500V (IR = 100A, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current SYMBOL VR VR IRMIN CONDITIONS MIN TYP MAX LM4040A (0.1%) 2.4975 2.5000 2.5025 LM4040B (0.2%) 2.4950 2.5000 2.5050 LM4040C (0.5%) 2.4875 2.5000 2.5125 LM4040D (1.0%) 2.4750 2.5000 2.5250 LM4040A 2.0 19 LM4040B 4.0 21 LM4040C 10 29 LM4040D 20 49 LM4040A/B/C 45 65 LM4040D 45 70 TA = +25C VR/T IR = 1mA LM4040A/B/C 15 100 LM4040D 15 150 IRMIN IR 1mA Reverse Dynamic Impedance (Note 3) Wideband Noise 1mA IR 15mA ZR eN Reverse Breakdown Voltage Long-Term Stability VR IR = 1mA, f = 120Hz, IAC = 0.1IR mV A ppm/C 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change V 20 IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) UNITS LM4040A/B/C 0.3 1.0 LM4040D 0.4 1.2 LM4040A/B/C 2.5 8.0 LM4040D 2.5 10.0 LM4040A/B 0.3 0.8 LM4040C 0.3 0.9 LM4040D 0.3 1.1 mV IR = 100A, 10Hz f 10kHz 35 VRMS T = 1000h 120 ppm _______________________________________________________________________________________ 3 LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages ELECTRICAL CHARACTERISTICS--3.000V (IR = 100A, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current SYMBOL VR VR IRMIN CONDITIONS TA = +25C MIN TYP MAX LM4040A (0.1%) 2.997 3.000 3.003 LM4040B (0.2%) 2.994 3.000 3.006 LM4040C (0.5%) 2.985 3.000 3.015 LM4040D (1.0%) 2.970 3.000 3.030 LM4040A 3.0 22 LM4040B 6.0 26 LM4040C 15 34 LM4040D 30 59 LM4040A/B/C 45 67 LM4040D 45 70 VR/T IR = 1mA LM4040A/B/C 15 100 LM4040D 15 150 IRMIN IR 1mA Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability 4 1mA IR 15mA ZR eN VR IR = 1mA, f = 120Hz, IAC = 0.1IR mV A ppm/C 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change V 20 IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) UNITS LM4040A/B/C 0.3 1.0 LM4040D 0.3 1.2 LM4040A/B/C 2.5 8.0 LM4040D 2.5 10.0 LM4040A/B 0.3 0.8 LM4040C 0.3 0.9 LM4040D 0.3 1.1 mV IR = 100A, 10Hz f 10kHz 45 VRMS T = 1000h 120 ppm _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ELECTRICAL CHARACTERISTICS--3.300V (IR = 100A, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS LM4040A (0.1%) Reverse Breakdown Voltage Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current VR VR IRMIN VR/T Reverse Dynamic Impedance (Note 3) 3.2934 3.3000 3.3066 3.2835 3.3000 3.3165 LM4040D (1.0%) 3.2670 3.3000 3.3330 LM4040A 3.0 22 LM4040B 6.0 26 LM4040C 15 34 LM4040D 30 59 LM4040A/B/C 45 67 LM4040D 45 70 IR = 1mA IRMIN IR 1mA Wideband Noise 1mA IR 15mA ZR eN Reverse Breakdown Voltage Long-Term Stability VR MAX 3.3033 LM4040C (0.5%) IR = 1mA, f = 120Hz, IAC = 0.1IR UNITS V mV A 20 LM4040A/B/C 15 100 LM4040D 15 150 ppm/C 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change TYP 3.3000 LM4040B (0.2%) TA = +25C IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) MIN 3.2967 LM4040A/B/C 0.3 1.0 LM4040D 0.3 1.2 LM4040A/B/C 2.5 8.0 LM4040D 2.5 10.0 LM4040A/B 0.3 0.8 LM4040C 0.3 0.9 LM4040D 0.3 1.1 mV IR = 100A, 10Hz f 10kHz 50 VRMS T = 1000h 120 ppm _______________________________________________________________________________________ 5 LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages ELECTRICAL CHARACTERISTICS--4.096V (IR = 100A, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current SYMBOL VR VR IRMIN CONDITIONS TA = +25C MIN TYP MAX LM4040A (0.1%) 4.092 4.096 4.100 LM4040B (0.2%) 4.088 4.096 4.104 LM4040C (0.5%) 4.076 4.096 4.116 LM4040D (1.0%) 4.055 4.096 4.137 LM4040A 4.1 31 LM4040B 8.2 35 LM4040C 20 47 LM4040D 41 81 LM4040A/B/C 50 73 LM4040D 50 78 VR/T IR = 1mA LM4040A/B/C 20 100 LM4040D 20 150 IRMIN IR 1mA A ppm/C LM4040A/B/C 0.5 1.2 LM4040D 0.5 1.5 LM4040A/B/C 3.0 10.0 LM4040D 3.0 13.0 LM4040A/B/C 0.5 1.0 LM4040D 0.5 1.3 mV Reverse Dynamic Impedance (Note 3) ZR IR = 1mA, f = 120Hz, IAC = 0.1IR Wideband Noise eN IR = 100A, 10Hz f 10kHz 64 VRMS T = 1000h 120 ppm Reverse Breakdown Voltage Long-Term Stability 6 1mA IR 15mA mV 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change V 30 IR = 10mA Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) UNITS VR _______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040 ELECTRICAL CHARACTERISTICS--5.000V (IR = 100A, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) SYMBOL VR VR IRMIN VR/T CONDITIONS TA = +25C MIN TYP MAX LM4040A (0.1%) 4.995 5.000 5.005 LM4040B (0.2%) 4.990 5.000 5.010 LM4040C (0.5%) 4.975 5.000 5.025 LM4040D (1.0%) 4.950 5.000 5.050 LM4040A 5.0 38 LM4040B 10 43 LM4040C 25 58 LM4040D 50 99 LM4040A/B/C 54 80 LM4040D 54 85 IR = 10mA 30 IR = 1mA LM4040A/B/C 20 100 LM4040D 20 150 IRMIN IR 1mA 1mA IR 15mA V mV A ppm/C 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change UNITS LM4040A/B/C 0.5 1.4 LM4040D 0.5 1.8 LM4040A/B/C 3.5 12.0 LM4040D 3.5 15.0 LM4040A/B/C 0.5 1.1 LM4040D 0.5 1.5 mV Reverse Dynamic Impedance (Note 3) ZR IR = 1mA, f = 120Hz, IAC = 0.1IR Wideband Noise eN IR = 100A, 10Hz f 10kHz 80 VRMS T = 1000h 120 ppm Reverse Breakdown Voltage Long-Term Stability VR Note 1: All devices are 100% production tested at TA = +25C 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)(maxT)(VR)], where VR/T is the VR temperature coefficient, maxT is the maximum difference in temperature from the reference point of +25C to TMIN or TMAX, and VR is the reverse breakdown voltage. The total overtemperature tolerance for the different grades in the temperature range where maxT = +65C is shown below: A grade: 0.75% = 0.1% 100ppm/C 65C B grade: 0.85% = 0.2% 100ppm/C 65C C grade: 1.15% = 0.5% 100ppm/C 65C D grade: 1.98% = 1.0% 150ppm/C 65C The total over-temperature tolerance for the different grades in the extended temperature range where max T = +100C is shown below: A grade: 1.1% = 0.1% 100ppm/C 100C B grade: 1.2% = 0.2% 100ppm/C 100C C grade: 1.5% = 0.5% 100ppm/C 100C D grade: 2.5% = 1.0% 150ppm/C 100C 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 = 100A, SC70-3 package, TA = +25C, unless otherwise noted.) REVERSE CHARACTERISTICS AND MINIMUM OPERATING CURRENT LM4040_I_3-3.0 3 2 LM4040_I_3-2.5 LM4040_I_3-2.1 0 0 REFERENCE VOLTAGE CHANGE (mV) -1 -2 -3 -4 -5 0 50 100 -5 -10 -15 -20 -50 -25 0 REVERSE CURRENT (A) 25 50 75 125 100 -50 -25 0 TEMPERATURE (C) LM4040-2.5V REVERSE VOLTAGE vs. ISHUNT TA = -40C 3 TA = +25C TA = +85C 2 1 6 REVERSE VOLTAGE CHANGE (mV) LM4040-04 TA = +125C 4 25 TA = -40C 5 4 TA = +125C 3 TA = +85C 2 1 TA = +25C 0 0 0 5 10 ISHUNT (mA) 8 15 20 0 50 75 TEMPERATURE (C) LM4040-5.0V REVERSE VOLTAGE vs. ISHUNT 5 REVERSE VOLTAGE CHANGE (mV) 0 LM4040 toc05 REVERSE VOLTAGE (V) 4 5 LM4040 toc03 1 5 1 LM4040-5.0V TEMPERATURE DRIFT LM4040-02 LM4040_I_3-5.0 REFERENCE VOLTAGE CHANGE (mV) LM4040_I_3-4.1 LM4040-01 6 LM4040-2.5V TEMPERATURE DRIFT 5 10 15 20 ISHUNT (mA) _______________________________________________________________________________________ 100 125 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-5.0V LOAD-TRANSIENT RESPONSE LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-08 LM4040-07 LM4040-06 VGEN VGEN VGEN 10mV/div VR AC-COUPLED 2mV/div VR AC-COUPLED VR AC-COUPLED -250A -25A -25A ISHUNT = 100A 25A RL = 100k, SEE FIGURE 1 LM4040-5.0V LOAD-TRANSIENT RESPONSE 10mV/div 10s/div 40s/div 10s/div CH1: VGEN 2V/div CH2: VR AC-COUPLED 2mV/div ISHUNT = 100A 25A, RL = 100k, SEE FIGURE 1 ISHUNT = 1mA 250A RL = 10k, SEE FIGURE 1 LM4040-5.0V LOAD-TRANSIENT RESPONSE LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-09 LM4040-11 LM4040-10 +2.5mA VGEN +2.5mA VGEN VGEN +250A -250A -2.5mA 10mV/div 20mV/div 10s/div 20mV/div 10s/div 10s/div ISHUNT = 1mA 250A RL = 10k, SEE FIGURE 1 VR AC-COUPLED -2.5mA VR AC-COUPLED VR AC-COUPLED +250A +25A +25A ISHUNT = 10mA 2.5mA RL = 1k, SEE FIGURE 1 ISHUNT = 10mA 2.5mA RL = 1k, SEE FIGURE 1 ISHUNT VB LM4040 Typical Operating Characteristics (continued) (IR = 100A, SC70 package, TA = +25C, unless otherwise noted.) 1k + - RL VR VGEN Figure 1. Load-Transient Test Circuit _______________________________________________________________________________________ 9 Typical Operating Characteristics (continued) (IR = 100A, SC70 package, TA = +25C, unless otherwise noted.) LM4040-2.5V STARTUP CHARACTERISTICS LM4040-5.0V STARTUP CHARACTERISTICS LM4040-2.5V OUTPUT IMPEDANCE vs. FREQUENCY LM4040-13 5V 1000 LM4040-14 LM4040-12 C1 = 1F 0V 2V 4V 1V 100 IMPEDANCE () 0V VOUT 2V 0V 4 8 C1 = 0 1 RS = 30k SEE FIGURE 2 0 IR = 150A 10 IR = 1mA RS = 16k SEE FIGURE 2 12 16 20 24 28 32 36 0 0.1 10 20 30 40 50 60 70 80 90 0.1k 1k 10k 100k RESPONSE TIME (s) RESPONSE TIME (s) FREQUENCY (Hz) LM4040-5.0V OUTPUT IMPEDANCE vs. FREQUENCY LM4040-2.5V NOISE vs. FREQUENCY LM4040-5.0V NOISE vs. FREQUENCY 10 NOISE (nV/Hz) IR = 150A IR = 1mA 1 10,000 10,000 NOISE (nV/Hz) C1 = 0 LM4040-16 LM4040-15 100 1000 1M LM4040-17 VOUT VIN VIN 5V 0V IMPEDANCE () LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 1000 C1 = 1F 0.1 100 0.1k 1k 10k 100k 1M 1 FREQUENCY (Hz) 10 100 1k 10k FREQUENCY (Hz) 100 1 10 100 FREQUENCY (Hz) RS VIN 1Hz RATE 50% DUTY CYCLE VR Figure 2. Startup Characteristics Test Circuit 10 ______________________________________________________________________________________ 1k 10k Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages PIN NAME FUNCTION 1 + Positive Terminal of the Shunt Reference 2 - Negative Terminal of the Shunt Reference 3 N.C. No connection. Leave this pin unconnected or connected to pin 2. 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 60A 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. 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 60A 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 ] / [60A + 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) VS ISHUNT + ILOAD RS ILOAD VR ISHUNT LM4040 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 +150C. The maximum operating temperature for the LM4040_E_ is +125C. 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 +70C and thus for 75mW of power dissipation, the part will selfheat to 35.56C above ambient temperature. If the ambient temperature is +125C, the part operates at 159.56C, thereby exceeding the maximum junction temperature value of +150C. 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 LM4040 Pin Description LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Ordering Information LM4040AIM3-2.1+T 2.048 INITIAL ACCURACY (%) 0.1 LM4040AIX3-2.1+T 2.048 LM4040BIM3-2.1+T 2.048 LM4040BIX3-2.1+T 2.048 PART OUTPUT VOLTAGE (V) TEMPCO (ppm/C) TEMP RANGE PIN-PACKAGE TOP MARK 100 -40C to +85C 3 SOT23 FZEF 0.1 100 -40C to +85C 3 SC70 0.2 100 -40C to +85C 3 SOT23 FZEG 0.2 100 -40C to +85C 3 SC70 ABK FZEH ABJ LM4040CIM3-2.1+T 2.048 0.5 100 -40C to +85C 3 SOT23 LM4040CIX3-2.1+T 2.048 0.5 100 -40C to +85C 3 SC70 ABL LM4040DIM3-2.1+T 2.048 1.0 150 -40C to +85C 3 SOT23 FZEI LM4040DIX3-2.1+T 2.048 1.0 150 -40C to +85C 3 SC70 ABM LM4040AEM3-2.1+T 2.048 0.1 100 -40C to +125C 3 SOT23 FZNG LM4040AEX3-2.1+T 2.048 0.1 100 -40C to +125C 3 SC70 ALF LM4040BEM3-2.1-T 2.048 0.2 100 -40C to +125C 3 SOT23 LM4040BEX3-2.1-T 2.048 0.2 100 -40C to +125C 3 SC70 FZNH ALG LM4040CEM3-2.1-T 2.048 0.5 100 -40C to +125C 3 SOT23 FZNI LM4040CEX3-2.1+T 2.048 0.5 100 -40C to +125C 3 SC70 ALH LM4040DEM3-2.1+T 2.048 1.0 150 -40C to +125C 3 SOT23 FZNJ LM4040DEX3-2.1+T 2.048 1.0 150 -40C to +125C 3 SC70 ALI LM4040AIM3-2.5+T 2.500 0.1 100 -40C to +85C 3 SOT23 FZEJ LM4040AIX3-2.5+T 2.500 0.1 100 -40C to +85C 3 SC70 ABN LM4040BIM3-2.5+T 2.500 0.2 100 -40C to +85C 3 SOT23 FZEK LM4040BIM3-2.5/V+T 2.500 0.2 100 -40C to +125C 3 SOT23 FZWL LM4040BIX3-2.5+T 2.500 0.2 100 -40C to +85C 3 SC70 ABO FZEL LM4040CIM3-2.5+T 2.500 0.5 100 -40C to +85C 3 SOT23 LM4040CIX3-2.5+T 2.500 0.5 100 -40C to +85C 3 SC70 LM4040DIM3-2.5+T 2.500 1.0 150 -40C to +85C 3 SOT23 LM4040DIX3-2.5+T 2.500 1.0 150 -40C to +85C 3 SC70 ABQ LM4040AEM3-2.5+T 2.500 0.1 100 -40C to +125C 3 SOT23 FZNK LM4040AEX3-2.5+T 2.500 0.1 100 -40C to +125C 3 SC70 LM4040BEM3-2.5+T 2.500 0.2 100 -40C to +125C 3 SOT23 LM4040BEX3-2.5+T 2.500 0.2 100 -40C to +125C 3 SC70 LM4040CEM3-2.5+T 2.500 0.5 100 -40C to +125C 3 SOT23 FZNM FZVZ ABP FZEM ALJ FZNL ALK LM4040CEM3-2.5/V+T 2.500 0.5 100 -40C to +125C 3 SOT23 LM4040CEX3-2.5+T 2.500 0.5 100 -40C to +125C 3 SC70 LM4040DEM3-2.5+T 2.500 1.0 150 -40C to +125C 3 SOT23 FZNN LM4040DEX3-2.5+T 2.500 1.0 150 -40C to +125C 3 SC70 ALM +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. 12 ______________________________________________________________________________________ ALL Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages OUTPUT VOLTAGE (V) PART INITIAL ACCURACY (%) TEMPCO (ppm/C) TEMP RANGE PIN-PACKAGE TOP MARK FZEN LM4040AIM3-3.0+T 3.000 0.1 100 -40C to +85C 3 SOT23 LM4040AIX3-3.0+T 3.000 0.1 100 -40C to +85C 3 SC70 ABR LM4040BIM3-3.0+T 3.000 0.2 100 -40C to +85C 3 SOT23 FZEO LM4040BIX3-3.0+T 3.000 0.2 100 -40C to +85C 3 SC70 ABS LM4040CIM3-3.0+T 3.000 0.5 100 -40C to +85C 3 SOT23 FZEP LM4040CIX3-3.0+T 3.000 0.5 100 -40C to +85C 3 SC70 LM4040DIM3-3.0+T 3.000 1.0 150 -40C to +85C 3 SOT23 FZEQ LM4040DIX3-3.0+T 3.000 1.0 150 -40C to +85C 3 SC70 ABU LM4040AEM3-3.0+T 3.000 0.1 100 -40C to +125C 3 SOT23 LM4040AEX3-3.0+T 3.000 0.1 100 -40C to +125C 3 SC70 ALN LM4040BEM3-3.0+T 3.000 0.2 100 -40C to +125C 3 SOT23 FZNP 3 SC70 ALO ABT FZNO LM4040BEX3-3.0+T 3.000 0.2 100 -40C to +125C LM4040CEX3-3.0+T 3.000 0.5 100 -40C to +125C 3 SC70 LM4040DEM3-3.0+T 3.000 1.0 150 -40C to +125C 3 SOT23 FZNR LM4040DEX3-3.0+T 3.000 1.0 150 -40C to +125C 3 SC70 ALQ LM4040AEX3-3.3+T 3.300 0.1 100 -40C to +125C 3 SC70 ANY LM4040BEX3-3.3+T 3.300 0.2 100 -40C to +125C 3 SC70 ANZ LM4040CEX3-3.3+T 3.300 0.5 100 -40C to +125C 3 SC70 AOA LM4040DEX3-3.3+T 3.300 1.0 150 -40C to +125C 3 SC70 AOB LM4040AIM3-4.1+T 4.096 0.1 100 -40C to +85C 3 SOT23 FZER LM4040AIX3-4.1+T 4.096 0.1 100 -40C to +85C 3 SC70 ABV LM4040BIM3-4.1+T 4.096 0.2 100 -40C to +85C 3 SOT23 FZES LM4040BIX3-4.1+T 4.096 0.2 100 -40C to +85C 3 SC70 ABW FZET ALP LM4040CIM3-4.1+T 4.096 0.5 100 -40C to +85C 3 SOT23 LM4040CIX3-4.1+T 4.096 0.5 100 -40C to +85C 3 SC70 ABX LM4040DIM3-4.1+T 4.096 1.0 150 -40C to +85C 3 SOT23 FZEU LM4040DIX3-4.1+T 4.096 1.0 150 -40C to +85C 3 SC70 ABY LM4040AEM3-4.1+T 4.096 0.1 100 -40C to +125C 3 SOT23 FZNS LM4040AEX3-4.1+T 4.096 0.1 100 -40C to +125C 3 SC70 ALR FZNT LM4040BEM3-4.1+T 4.096 0.2 100 -40C to +125C 3 SOT23 LM4040BEX3-4.1+T 4.096 0.2 100 -40C to +125C 3 SC70 LM4040CEM3-4.1+T 4.096 0.5 100 -40C to +125C 3 SOT23 ALS FZNU +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. ______________________________________________________________________________________ 13 LM4040 Ordering Information (continued) LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Ordering Information (continued) OUTPUT VOLTAGE (V) INITIAL ACCURACY (%) TEMPCO (ppm/C) TEMP RANGE LM4040CEX3-4.1+T 4.096 0.5 100 -40C to +125C 3 SC70 LM4040DEM3-4.1+T 4.096 1.0 150 -40C to +125C 3 SOT23 FZNV LM4040DEM3-4.1/V+T 4.096 1.0 150 -40C to +125C 3 SOT23 FZWA LM4040DEX3-4.1+T 4.096 1.0 150 -40C to +125C 3 SC70 ALU LM4040AIM3-5.0+T 5.000 0.1 100 -40C to +85C 3 SOT23 FZEV LM4040AIX3-5.0+T 5.000 0.1 100 -40C to +85C 3 SC70 ABZ PART PIN-PACKAGE TOP MARK ALT LM4040BIM3-5.0+T 5.000 0.2 100 -40C to +85C 3 SOT23 LM4040BIX3-5.0+T 5.000 0.2 100 -40C to +85C 3 SC70 ACA LM4040CIM3-5.0+T 5.000 0.5 100 -40C to +85C 3 SOT23 FZEX LM4040CIX3-5.0+T 5.000 0.5 100 -40C to +85C 3 SC70 ACB LM4040DIM3-5.0+T 5.000 1.0 150 -40C to +85C 3 SOT23 FZEY LM4040DIX3-5.0+T 5.000 1.0 150 -40C to +85C 3 SC70 ACC LM4040AEM3-5.0+T 5.000 0.1 100 -40C to +125C 3 SOT23 FZNW LM4040AEM3-5.0/V+T 5.000 0.1 100 -40C to +125C 3 SOT23 FZWB LM4040AEX3-5.0+T 5.000 0.1 100 -40C to +125C 3 SC70 LM4040BEM3-5.0+T 5.000 0.2 100 -40C to +125C 3 SOT23 LM4040BEX3-5.0+T 5.000 0.2 100 -40C to +125C 3 SC70 ALW LM4040CEM3-5.0+T 5.000 0.5 100 -40C to +125C 3 SOT23 FZNY +FZWC LM4040CEM3-5.0/V+T 5.000 0.5 100 -40C to +125C 3 SOT23 LM4040CEX3-5.0+T 5.000 0.5 100 -40C to +125C 3 SC70 LM4040DEM3-5.0+T 5.000 1.0 150 -40C to +125C 3 SOT23 LM4040DEX3-5.0+T 5.000 1.0 +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. 150 -40C to +125C 3 SC70 14 ALV FZNX ALX FZNZ ALY Package Information Chip Information PROCESS: BiCMOS FZEW 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 PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 3 SOT23 U3+1 21-0051 90-0179 3 SC70 X3+2 21-0075 90-0208 ______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages REVISION NUMBER REVISION DATE 0 8/00 Initial release 5 7/05 Updated Electrical Characteristics. 6 4/11 Updated Selector Guide, Absolute Maximum Ratings, and Ordering Information. 1, 2, 12, 13, 14 7 11/11 Add /V+ automotive-qualified identification to the Selector Guide and Ordering Information. 1, 12 DESCRIPTION PAGES CHANGED -- 2-7 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 (c) 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. LM4040 Revision History