19-1787; Rev 5; 7/05 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. The LM4040 is guaranteed over the temperature range of -40C to +125C. For a 1.225V output version, refer to the LM4041 data sheet. Features Ultra-Small 3-Pin SC70 Package 0.1% (max) Initial Accuracy 100ppm/C (max) Temperature Coefficient Guaranteed over -40C to +125C Temperature Range Wide Operating Current Range: 60A to 15mA Low 28VRMS Output Noise (10Hz to 10kHz) 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V Fixed Reverse Breakdown Voltages No Output Capacitors Required Tolerates Capacitive Loads Selector Guide OUTPUT PINVOLTAGE PACKAGE (V) PART TEMP RANGE LM4040_IM3-2.1 -40C to +85C 3 SOT23-3 2.048 Portable, Battery-Powered Equipment LM4040_IX3-2.1 -40C to +85C 3 SC70-3 2.048 Notebook Computers LM4040_EM3-2.1 -40C to +125C 3 SOT23-3 ________________________Applications Cell Phones Industrial Process Controls Pin Configuration TOP VIEW + 1 LM4040 3 N.C.* - 2 SC70-3/SOT23-3 *PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2. 2.048 LM4040_EX3-2.1 -40C to +125C 3 SC70-3 2.048 LM4040_IM3-2.5 -40C to +85C 3 SOT23-3 2.500 LM4040_IX3-2.5 -40C to +85C 3 SC70-3 2.500 LM4040_EM3-2.5 -40C to +125C 3 SOT23-3 2.500 LM4040_EX3-2.5 -40C to +125C 3 SC70-3 2.500 LM4040_IM3-3.0 -40C to +85C 3 SOT23-3 3.000 LM4040_IX3-3.0 -40C to +85C 3 SC70-3 3.000 LM4040_EM3-3.0 -40C to +125C 3 SOT23-3 3.000 LM4040_EX3-3.0 -40C to +125C 3 SC70-3 3.000 LM4040_EX3-3.3 -40C to +125C 3 SC70-3 3.300 LM4040_IM3-4.1 -40C to +85C 3 SOT23-3 4.096 LM4040_IX3-4.1 -40C to +85C 3 SC70-3 4.096 LM4040_EM3-4.1 -40C to +125C 3 SOT23-3 4.096 LM4040_EX3-4.1 -40C to +125C 3 SC70-3 4.096 LM4040_IM3-5.0 -40C to +85C 3 SOT23-3 5.000 LM4040_IX3-5.0 -40C to +85C 3 SC70-3 5.000 LM4040_EM3-5.0 -40C to +125C 3 SOT23-3 5.000 LM4040_EX3-5.0 5.000 -40C to +125C 3 SC70-3 Ordering Information appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas 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 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 TA = +25C 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 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 TA = +25C 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 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 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 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 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 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%) 3.2967 3.3000 3.3033 LM4040B (0.2%) 3.2934 3.3000 3.3066 LM4040C (0.5%) 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 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 0.3 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 Average Reverse Voltage Temperature Coefficient (Notes 2 and 3) SYMBOL VR VR IRMIN VR/T CONDITIONS TA = +25C MIN TYP MAX LM4040A (0.1%) 4.092 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 IR = 10mA 30 IR = 1mA LM4040A/B/C 20 100 LM4040D 20 150 IRMIN IR 1mA mV A ppm/C LM4040A/B/C 0.5 LM4040D 0.5 1.2 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 V 15 IR = 100A Reverse Breakdown Voltage Change with Operating Current Change 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 SYMBOL VR VR IRMIN 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 VR/T IR = 1mA LM4040A/B/C 20 100 LM4040D 20 150 IRMIN IR 1mA 1mA IR 15mA mV A ppm/C 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 LM4040A/B/C 0.5 LM4040D 0.5 1.4 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 +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 LM4040-5.0V LOAD-TRANSIENT RESPONSE LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-2.5V LOAD-TRANSIENT RESPONSE LM4040-07 LM4040-06 LM4040-08 +25A VR AC-COUPLED VR AC-COUPLED 2mV/div 10mV/div -250A VR AC-COUPLED -25A -25A 40s/div 10s/div LM4040-5.0V LOAD-TRANSIENT RESPONSE 10mV/div 10s/div ISHUNT = 100A 25A RL = 100k, SEE FIGURE 1 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 VGEN VGEN VGEN +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, SC70-3 package, TA = +25C, unless otherwise noted.) 1k + - RL VR VGEN Figure 1. Load-Transient Test Circuit _______________________________________________________________________________________ 9 Typical Operating Characteristics (continued) (IR = 100A, SC70-3 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. Chip Information TRANSISTOR COUNT: 60 PROCESS: BiCMOS ______________________________________________________________________________________ 11 LM4040 Pin Description LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 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 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 LM4040CEX3-2.5-T LM4040DEM3-2.5-T LM4040DEX3-2.5-T 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 LM4040CEM3-3.0-T 12 OUTPUT VOLTAGE (V) INITIAL ACCURACY (%) TEMPCO (ppm/C) TEMP RANGE 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 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 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 0.5 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 0.5 0.5 1.0 1.0 0.1 0.1 0.2 0.2 0.5 100 100 100 100 100 100 150 150 100 100 100 100 100 100 150 150 100 100 100 100 100 100 150 150 100 100 100 100 100 100 150 150 100 100 100 100 100 100 150 150 100 100 100 100 100 -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PIN-PACKAGE TOP MARK 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 3 SC70-3 3 SOT23-3 FZEF ABJ FZEG ABK FZEH ABL FZEI ABM FZNG ALF FZNH ALG FZNI ALH FZNJ ALI FZEJ ABN FZEK ABO FZEL ABP FZEM ABQ FZNK ALJ FZNL ALK FZNM ALL FZNN ALM FZEN ABR FZEO ABS FZEP ABT FZEQ ABU FZNO ALN FZNP ALO FZNQ ______________________________________________________________________________________ Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages PART LM4040CEX3-3.0-T OUTPUT VOLTAGE (V) INITIAL ACCURACY (%) TEMPCO (ppm/C) TEMP RANGE 3.000 0.5 100 -40C to +125C PIN-PACKAGE 3 SC70-3 TOP MARK ALP LM4040DEM3-3.0-T 3.000 1.0 150 -40C to +125C 3 SOT23-3 FZNR LM4040DEX3-3.0-T 3.000 1.0 150 -40C to +125C 3 SC70-3 ALQ LM4040AEX3-3.3-T 3.300 0.1 100 -40C to +125C 3 SC70-3 ANY LM4040BEX3-3.3-T 3.300 0.2 100 -40C to +125C 3 SC70-3 ANZ LM4040CEX3-3.3-T 3.300 0.5 100 -40C to +125C 3 SC70-3 AOA LM4040DEX3-3.3-T 3.300 1.0 150 -40C to +125C 3 SC70-3 AOB FZER LM4040AIM3-4.1-T 4.096 0.1 100 -40C to +85C 3 SOT23-3 LM4040AIX3-4.1-T 4.096 0.1 100 -40C to +85C 3 SC70-3 ABV LM4040BIM3-4.1-T 4.096 0.2 100 -40C to +85C 3 SOT23-3 FZES 3 SC70-3 LM4040BIX3-4.1-T 4.096 0.2 100 -40C to +85C LM4040CIM3-4.1-T 4.096 0.5 100 -40C to +85C 3 SOT23-3 FZET ABW LM4040CIX3-4.1-T 4.096 0.5 100 -40C to +85C 3 SC70-3 ABX LM4040DIM3-4.1-T 4.096 1.0 150 -40C to +85C 3 SOT23-3 FZEU LM4040DIX3-4.1-T 4.096 1.0 150 -40C to +85C 3 SC70-3 ABY LM4040AEM3-4.1-T 4.096 0.1 100 -40C to +125C 3 SOT23-3 FZNS LM4040AEX3-4.1-T 4.096 0.1 100 -40C to +125C 3 SC70-3 ALR LM4040BEM3-4.1-T 4.096 0.2 100 -40C to +125C 3 SOT23-3 FZNT LM4040BEX3-4.1-T 4.096 0.2 100 -40C to +125C 3 SC70-3 ALS LM4040CEM3-4.1-T 4.096 0.5 100 -40C to +125C 3 SOT23-3 LM4040CEX3-4.1-T 4.096 0.5 100 -40C to +125C 3 SC70-3 FZNU LM4040DEM3-4.1-T 4.096 1.0 150 -40C to +125C 3 SOT23-3 LM4040DEX3-4.1-T 4.096 1.0 150 -40C to +125C 3 SC70-3 ALU LM4040AIM3-5.0-T 5.000 0.1 100 -40C to +85C 3 SOT23-3 FZEV LM4040AIX3-5.0-T 5.000 0.1 100 -40C to +85C 3 SC70-3 LM4040BIM3-5.0-T 5.000 0.2 100 -40C to +85C 3 SOT23-3 FZEW LM4040BIX3-5.0-T 5.000 0.2 100 -40C to +85C 3 SC70-3 ACA LM4040CIM3-5.0-T 5.000 0.5 100 -40C to +85C 3 SOT23-3 FZEX LM4040CIX3-5.0-T 5.000 0.5 100 -40C to +85C 3 SC70-3 ACB LM4040DIM3-5.0-T 5.000 1.0 150 -40C to +85C 3 SOT23-3 FZEY LM4040DIX3-5.0-T 5.000 1.0 150 -40C to +85C 3 SC70-3 LM4040AEM3-5.0-T 5.000 0.1 100 -40C to +125C 3 SOT23-3 LM4040AEX3-5.0-T 5.000 0.1 100 -40C to +125C 3 SC70-3 ALT FZNV ABZ ACC FZNW ALV LM4040BEM3-5.0-T 5.000 0.2 100 -40C to +125C 3 SOT23-3 LM4040BEX3-5.0-T 5.000 0.2 100 -40C to +125C 3 SC70-3 FZNX ALW LM4040CEM3-5.0-T 5.000 0.5 100 -40C to +125C 3 SOT23-3 FZNY LM4040CEX3-5.0-T 5.000 0.5 100 -40C to +125C 3 SC70-3 ALX ______________________________________________________________________________________ 13 LM4040 Ordering Information (continued) Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) SOT23 L.EPS LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages PACKAGE OUTLINE, 3L SOT-23 21-0051 14 ______________________________________________________________________________________ F 1 1 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages SC70, 3L.EPS PACKAGE OUTLINE, 3L SC70 21-0075 C 1 1 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. 15 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. LM4040 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)