19-2892; Rev 0; 7/03 Ultra-Low-Power Precision Series Voltage Reference Features ♦ Ultra-Low 5.25µA (max) Supply Current ♦ ±0.15% (max) Initial Accuracy ♦ 30ppm/°C (max) Temperature Coefficient ♦ 4mA Output Source Current ♦ 1mA Output Sink Current ♦ 2.5V to 12.6V Supply Range ♦ Low 200mV Dropout ♦ Stable with Capacitive Loads Up to 10µF ♦ No External Capacitors Required ♦ Miniature 5-Pin SOT23 Package The MAX6029 provides six output voltages of 2.048V, 2.5V, 3V, 3.3V, 4.096V, and 5V. The MAX6029 is available in a 5-pin SOT23 package and is specified over the extended temperature range (-40°C to +85°C). Ordering Information PART Applications Battery-Powered Systems Hand-Held Instruments TEMP RANGE PINPACKAGE TOP MARK MAX6029EUK21-T -40°C to +85°C 5 SOT23-5 MAX6029EUK25-T -40°C to +85°C 5 SOT23-5 AEHD AEHF MAX6029EUK30-T -40°C to +85°C 5 SOT23-5 AEHH AEHN MAX6029EUK33-T -40°C to +85°C 5 SOT23-5 Precision Power Supplies MAX6029EUK41-T -40°C to +85°C 5 SOT23-5 AEHJ A/D and D/A Converters MAX6029EUK50-T -40°C to +85°C 5 SOT23-5 AEHL Selector Guide Pin Configuration PIN-PACKAGE OUTPUT VOLTAGE (V) MAX6029EUK21-T 5 SOT23-5 2.048 MAX6029EUK25-T 5 SOT23-5 2.500 MAX6029EUK30-T 5 SOT23-5 3.000 MAX6029EUK33-T 5 SOT23-5 3.300 MAX6029EUK41-T 5 SOT23-5 4.096 MAX6029EUK50-T 5 SOT23-5 5.000 PART TOP VIEW IN 1 GND 2 5 OUT MAX6029 N.C. 3 4 N.C. SOT23 ________________________________________________________________ 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 MAX6029 General Description The MAX6029 micropower, low-dropout bandgap voltage reference combines ultra-low supply current and low drift in a miniature 5-pin SOT23 surface-mount package that uses 70% less board space than comparable devices in an SO package. An initial accuracy of 0.15% and a 30ppm/°C (max) temperature coefficient make the MAX6029 suitable for precision applications. This series-mode voltage reference sources up to 4mA and sinks up to 1mA of load current. A wide 2.5V to 12.6V supply range, ultra-low 5.25µA (max) supply current, and a low 200mV dropout voltage make these devices ideal for battery-operated systems. Additionally, an internal compensation capacitor eliminates the need for an external compensation capacitor and ensures stability with load capacitances up to 10µF. MAX6029 Ultra-Low-Power Precision Series Voltage Reference ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +13V OUT to GND ..............-0.3V to the lower of +6V and (VIN + 0.3V) Output to GND Short-Circuit Duration........................Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°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—MAX6029_21 (VOUT = 2.048V) (VIN = 2.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2.0449 2.0480 2.0511 V 30 ppm/°C µV/V OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Output Short-Circuit Current VOUT TA = +25°C TCVOUT (Notes 2, 3) ∆VOUT/∆VIN VIN = 2.5V to 12.6V ∆VOUT/ ∆IOUT 27 200 IOUT = 0 to 4mA 0.22 0.7 IOUT = 0 to -1mA 2.4 5.5 ISC µV/µA 60 mA Long-Term Stability ∆VOUT/time 1000 hours at +25°C 150 ppm Thermal Hysteresis (Note 4) 140 ppm f = 0.1Hz to 10Hz 30 µVP-P f = 10Hz to 1kHz 115 µVRMS ∆VOUT/∆VIN VIN = 2.5V ±200mV, f = 120Hz 43 dB 450 µs DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time eOUT tR To VOUT = 0.1% of final value INPUT Supply Voltage Range VIN Supply Current IIN Change in Supply Current 2 IIN/VIN 2.5 VIN = 2.5V to 12.6V _______________________________________________________________________________________ 12.6 V 5.25 µA 1.5 µA/V Ultra-Low-Power Precision Series Voltage Reference (VIN = 2.7V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2.4963 2.5000 2.5038 V 30 ppm/°C µV/V OUTPUT Output Voltage Output Voltage Temperature Coefficient VOUT TA = +25°C TCVOUT (Notes 2, 3) ∆VOUT/∆VIN Line Regulation ∆VOUT/∆IOUT Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current VIN - VOUT 30 230 IOUT = 0 to 4mA 0.1 0.6 IOUT = 0 to -1mA 2.5 6.2 IOUT = 0 100 IOUT = 4mA 200 ISC ∆VOUT/time Long-Term Stability VIN = 2.7V to 12.6V Thermal Hysteresis 60 µV/µA mV mA 1000 hours at +25°C 150 ppm (Note 4) 140 ppm DYNAMIC CHARACTERISTICS Noise Voltage f = 0.1Hz to 10Hz 39 µVP-P f = 10Hz to 1kHz 137 µVRMS ∆VOUT/∆VIN VIN = 2.7V ±200mV, f = 120Hz 34 dB tR To VOUT = 0.1% of final value 700 ms eOUT Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range VIN Supply Current IIN Change in Supply Current IIN/VIN 2.7 VIN = 2.7V to 12.6V 12.6 V 5.75 µA 1.5 µA/V _______________________________________________________________________________________ 3 MAX6029 ELECTRICAL CHARACTERISTICS—MAX6029_25 (VOUT = 2.500V) MAX6029 Ultra-Low-Power Precision Series Voltage Reference ELECTRICAL CHARACTERISTICS—MAX6029_30 (VOUT = 3.000V) (VIN = 3.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2.9955 3.0000 3.0045 V 30 ppm/°C µV/V OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current VOUT TA = +25°C TCVOUT (Notes 2, 3) ∆VOUT/∆VIN VIN = 3.2V to 12.6V ∆VOUT/ ∆IOUT VIN - VOUT 15 250 IOUT = 0 to 4mA 0.1 0.6 IOUT = 0 to -1mA 2.4 6.5 IOUT = 0 100 IOUT = 4mA 200 ISC 60 µV/µA mV mA Long-Term Stability ∆VOUT/time 1000 hours at +25°C 150 ppm Thermal Hysteresis (Note 4) 140 ppm DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time f = 0.1Hz to 10Hz 39 µVP-P f = 10Hz to 1kHz 161 µVRMS ∆VOUT/∆VIN VIN = 3.2V ±200mV, f = 120Hz tR To VOUT = 0.1% of final value 37 dB 775 µs eOUT INPUT Supply Voltage Range Supply Current Change in Supply Current 4 VIN 3.2 IIN IIN/VIN VIN = 3.2V to 12.6V _______________________________________________________________________________________ 12.6 V 6.75 µA 1.5 µA/V Ultra-Low-Power Precision Series Voltage Reference (VIN = 3.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient SYMBOL VOUT TA = +25°C TCVOUT (Notes 2, 3) ∆VOUT/∆VIN Line Regulation ∆VOUT/∆IOUT Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current VIN - VOUT MIN TYP MAX UNITS 3.2951 3.3000 3.3050 V 30 ppm/°C µV/V VIN = 3.5V to 12.6V 30 270 IOUT = 0 to 4mA 0.1 0.6 IOUT = 0 to -1mA 2.4 7 IOUT = 0 100 IOUT = 4mA 200 ISC ∆VOUT/time Long-Term Stability CONDITIONS Thermal Hysteresis µV/µA mV 60 mA 1000 hours at +25°C 150 ppm (Note 4) 140 ppm DYNAMIC CHARACTERISTICS Noise Voltage f = 0.1Hz to 10Hz 56 µVP-P f = 10Hz to 1kHz 174 µVRMS ∆VOUT/∆VIN VIN = 3.5V ±200mV, f = 120Hz 38 dB tR To VOUT = 0.1% of final value 1 ms eOUT Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current VIN 3.5 IIN Change in Supply Current IIN/VIN VIN = 3.5V to 12.6V 12.6 V 7.25 µA 1.5 µA/V _______________________________________________________________________________________ 5 MAX6029 ELECTRICAL CHARACTERISTICS—MAX6029_33 (VOUT = 3.300V) MAX6029 Ultra-Low-Power Precision Series Voltage Reference ELECTRICAL CHARACTERISTICS—MAX6029_41 (VOUT = 4.096V) (VIN = 4.3V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 4.0899 4.0960 4.1021 V 30 ppm/°C µV/V OUTPUT Output Voltage Output Voltage Temperature Coefficient VOUT TA = +25°C TCVOUT (Notes 2, 3) Line Regulation ∆VOUT/∆VIN Load Regulation ∆VOUT/∆IOUT Dropout Voltage (Note 5) Output Short-Circuit Current Long-Term Stability VIN - VOUT VIN = 4.3V to 12.6V 30 310 IOUT = 0 to 4mA 0.1 0.6 IOUT = 0 to -1mA 2.5 8.5 IOUT = 0 100 IOUT = 4mA 200 ISC ∆VOUT/time Thermal Hysteresis µV/µA mV 60 mA 1000 hours at +25°C 150 ppm (Note 4) 140 ppm f = 0.1Hz to 10Hz 72 µVP-P µVRMS DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time eOUT f = 10Hz to 1kHz 210 ∆VOUT/∆VIN VIN = 4.3V ±200mV, f = 120Hz 36 dB tR To VOUT = 0.1% of final value 1.2 ms INPUT Supply Voltage Range VIN Supply Current IIN Change in Supply Current 6 IIN/VIN 4.3 VIN = 4.3V to 12.6V _______________________________________________________________________________________ 12.6 V 8.75 µA 1.5 µA/V Ultra-Low-Power Precision Series Voltage Reference (VIN = 5.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 4.9925 5.0000 5.0075 V 30 ppm/°C 34 375 µV/V 0.3 0.8 3.3 9 OUTPUT Output Voltage Output Voltage Temperature Coefficient VOUT TA = +25°C TCVOUT (Notes 2, 3) ∆VOUT/∆VIN VIN = 5.2V to 12.6V IOUT = 0 to 4mA ∆VOUT/ ∆IOUT IOUT = 0 to -1mA Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current VIN - VOUT IOUT = 0 100 IOUT = 4mA 200 ISC µV/µA mV 60 mA Long-Term Stability ∆VOUT/time 1000 hours at +25°C 150 ppm Thermal Hysteresis (Note 4) 140 ppm f = 0.1Hz to 10Hz 90 µVP-P f = 10Hz to 1kHz 245 µVRMS ∆VOUT/∆VIN VIN = 5.2V ±200mV, f = 120Hz 38 dB 1.4 ms DYNAMIC CHARACTERISTICS Noise Voltage eOUT Ripple Rejection Turn-On Settling Time tR To VOUT = 0.1% of final value INPUT Supply Voltage Range VIN Supply Current IIN Change in Supply Current IIN/VIN 5.2 VIN = 5.2V to 12.6V 12.6 V 10.5 µA 1.5 µA/V MAX6029 is 100% production tested at TA = +25°C and is guaranteed by design for TA = TMIN to TMAX as specified. Temperature coefficient is defined by box method: (VMAX - VMIN)/(∆T ✕ V+25°C). Not production tested. Guaranteed by design. Thermal hysteresis is defined as the change in TA = +25°C output voltage before and after temperature cycling of the device (from TA = TMIN to TMAX). Initial measurement at TA = +25°C is followed by temperature cycling the device to TA = +85°C then to TA = -40°C and another measurement at TA = +25°C is compared to the original measurement at TA = +25°C. Note 5: Dropout voltage is the minimum input voltage at which VOUT changes by 0.1% from VOUT at rated VIN and is guaranteed by Load Regulation Test. Note 1: Note 2: Note 3: Note 4: _______________________________________________________________________________________ 7 MAX6029 ELECTRICAL CHARACTERISTICS—MAX6029_50 (VOUT = 5.000V) Typical Operating Characteristics (VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless otherwise noted.) 2.044 5.006 2.999 2.997 2.995 MAX6029 toc03 3 TYPICAL UNITS 3.001 OUTPUT VOLTAGE (V) 2.046 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 5V) 3 TYPICAL UNITS 5.004 5.002 OUTPUT VOLTAGE (V) 3 TYPICAL UNITS 2.048 OUTPUT VOLTAGE (V) 3.003 MAX6029 toc01 2.050 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 3V) MAX6029 toc02 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.048V) 5.000 4.998 4.996 4.994 4.992 2.042 2.993 4.990 2.040 2.991 -40 -15 10 35 85 60 -15 10 -40 85 60 -15 10 35 60 85 TEMPERATURE (°C) SUPPLY CURRENT vs. INPUT VOLTAGE SUPPLY CURRENT vs. TEMPERATURE DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 2.048V) VOUT = 3V VOUT = 2.048V 4 5.5 VOUT = 3V 5.0 4.5 4.0 VOUT = 2.048V 3.5 VOUT = 5V 0.14 0.10 0.08 0.06 0.02 0 2.5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 0.12 0.04 3.0 0 MAX6029 toc06 VOUT = 5V DROPOUT VOLTAGE (V) SUPPLY CURRENT (µA) 8 6 6.5 6.0 0.16 MAX6029 toc05 7.0 MAX6029 toc04 10 2 -40 -15 10 35 0 85 60 1 2 3 4 5 INPUT VOLTAGE (V) TEMPERATURE (°C) SOURCE CURRENT (mA) DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 3V) DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 5V) LOAD REGULATION (VOUT = 2.048V) 0.08 0.07 0.06 0.05 0.04 0.03 0.07 0.06 0.05 0.04 0.03 2.0515 2.0510 2.0505 2.0500 2.0495 2.0490 2.0485 0.02 2.0480 0.01 0.01 2.0475 0 0 0.02 0 1 2 3 4 5 SOURCE CURRENT (mA) 6 7 MAX6029 toc09 0.08 DROPOUT VOLTAGE (V) 0.09 7 6 2.0520 OUTPUT VOLTAGE (V) 0.10 MAX6029 toc08 0.09 MAX6029 toc07 0.11 8 35 TEMPERATURE (°C) 12 SUPPLY CURRENT (µA) 4.988 -40 TEMPERATURE (°C) 14 DROPOUT VOLTAGE (V) MAX6029 Ultra-Low-Power Precision Series Voltage Reference 2.0470 0 1 2 3 4 5 SOURCE CURRENT (mA) 6 7 -2 -1 0 1 2 3 4 OUTPUT CURRENT (mA) _______________________________________________________________________________________ 5 6 7 Ultra-Low-Power Precision Series Voltage Reference LOAD REGULATION (VOUT = 3V) 3.0045 2.04784 2.04782 2.04780 2.04778 3.0040 3.0035 3.0030 3.0025 2.04776 3.0020 2.04774 3.0015 2.04772 5.5 7.0 8.5 10.0 11.5 13.0 -1 0 1 3 4 5 LOAD REGULATION (VOUT = 5V) LINE REGULATION (VOUT = 5V) MAX6029 toc13 5.0030 5.0025 5.0020 3 5.00070 2 3 4 5 6 10 11 12 13 0 -10 -30 -60 5 7 6 7 8 9 10 11 12 13 0.1 INPUT VOLTAGE (V) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 3V) 1 10 1000 100 FREQUENCY (kHz) LINE-TRANSIENT RESPONSE (VOUT = 2.048V) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 5V) MAX6029 toc18 MAX6029 toc17 0 MAX6029 toc16 -10 9 -50 OUTPUT CURRENT (mA) 0 8 -40 5.00064 1 7 -20 5.00072 5.00066 0 6 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.048V) 5.00074 5.0010 -1 5 5.00076 5.00068 -2 4 INPUT VOLTAGE (V) 5.00078 5.0015 5.0005 7 PSRR (dB) 5.0035 6 5.00080 OUTPUT VOLTAGE (V) 5.0040 -5 -10 3V VIN 200mV/div AC-COUPLED -15 PSRR (dB) -20 PSRR (dB) 2 OUTPUT CURRENT (mA) 5.0045 OUTPUT VOLTAGE (V) 3.00155 -2 INPUT VOLTAGE (V) 5.0050 3.00165 MAX6029 toc14 4.0 3.00170 3.00160 3.0010 2.5 3.00175 MAX6029 toc15 2.04786 MAX6029 toc11 3.0050 OUTPUT VOLTAGE (V) 2.04788 3.00180 OUTPUT VOLTAGE (V) 2.04790 OUTPUT VOLTAGE (V) 3.0055 MAX6029 toc10 2.04792 LINE REGULATION (VOUT = 3V) MAX6029 toc12 LINE REGULATION (VOUT = 2.048V) MAX6029 Typical Operating Characteristics (continued) (VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless otherwise noted.) -30 -40 2.5V -20 -25 -30 -35 VOUT 200mV/div AC-COUPLED 2.048V -40 -50 -45 -60 -50 0.1 1 10 FREQUENCY (kHz) 100 1000 0.1 1 10 100 1000 200µs/div FREQUENCY (kHz) _______________________________________________________________________________________ 9 MAX6029 Ultra-Low-Power Precision Series Voltage Reference Typical Operating Characteristics (continued) (VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless otherwise noted.) LINE-TRANSIENT RESPONSE (VOUT = 3V) LINE-TRANSIENT RESPONSE (VOUT = 5V) MAX6029 toc19 3.7V MAX61029 toc20 VIN 200mV/div AC-COUPLED 3.2V 5.7V VIN 200mV/div AC-COUPLED 5.2V VOUT 100mV/div AC-COUPLED 5V VOUT 200mV/div AC-COUPLED 3V 200µs/div 200µs/div LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 2.048V) LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 2.048V) MAX6029 toc21 MAX6029 toc22 COUT = 0 COUT = 0 IOUT 10mA/div 4mA 0 VOUT 500mV/div AC-COUPLED 2.048V IOUT 2mA/div 0 -1mA VOUT 500mV/div AC-COUPLED 2.048V 100µs/div 1ms/div LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 2.048V) LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 2.048V) MAX6029 toc23 MAX6029 toc24 COUT = 1µF COUT = 1µF IOUT 10mA/div 4mA 0 VOUT 500mV/div AC-COUPLED 2.048V 400µs/div 10 0 -1mA IOUT 2mA/div VOUT 500mV/div AC-COUPLED 2.048V 1ms/div ______________________________________________________________________________________ Ultra-Low-Power Precision Series Voltage Reference LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 5V) LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 5V) MAX6029 toc25 MAX6029 toc26 COUT = 0 COUT = 0 IOUT 10mA/div 4mA 0 0 IOUT 1mA/div -1mA VOUT 500mV/div AC-COUPLED 5V VOUT 1V/div AC-COUPLED 5V 400µs/div 2ms/div LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 5V) LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 5V) 6029 toc27 MAX6029 toc28 COUT = 1µF COUT = 1µF IOUT 10mA/div 4mA 0 0 IOUT 1mA/div -1mA VOUT 200mV/div AC-COUPLED 6V VOUT 1V/div AC-COUPLED 5V 400µs/div 2ms/div TURN-ON TRANSIENT (VOUT = 2.048V) TURN-ON TRANSIENT (VOUT = 3V) MAX6029 toc29 2.5V MAX6029 toc30 VIN 1V/div 3.2V VIN 2V/div 0 0 3V 2.048V VOUT 1V/div VOUT 1V/div 0 0 200µs/div 200µs/div ______________________________________________________________________________________ 11 MAX6029 Typical Operating Characteristics (continued) (VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25°C, unless otherwise noted.) 0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 2.048V) TURN-ON TRANSIENT (VOUT = 5V) 0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 3V) MAX6029 toc32 MAX6029 toc31 MAX6029 toc33 5.2V VIN 2V/div VOUT 10µV/div VOUT 10µV/div 0 5V VOUT 2V/div 0 1s/div 400µs/div 1s/div NOISE vs. FREQUENCY (VOUT = 2.048V) 0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 5V) MAX6029 toc34 MAX6029 toc35 4.0 VOUT 20µV/div NOISE (µVRMS/√Hz) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 1s/div 10 20 30 40 50 FREQUENCY (kHz) NOISE vs. FREQUENCY (VOUT = 5V) NOISE vs. FREQUENCY (VOUT = 3V) MAX6029 toc37 18 16 14 12 10 8 6 4 2 0 0 10 20 30 FREQUENCY (kHz) 12 20 MAX6029 toc36 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 NOISE (µVRMS/√Hz) NOISE (µVRMS/√Hz) MAX6029 Ultra-Low-Power Precision Series Voltage Reference 40 50 0 10 20 30 40 FREQUENCY (kHz) ______________________________________________________________________________________ 50 Ultra-Low-Power Precision Series Voltage Reference PIN NAME 1 IN FUNCTION 2 GND Ground 3, 4 N.C. No Connection. Leave unconnected or connect to ground. 5 OUT Reference Output Positive Voltage Supply age source only when required, so supply current is not wasted and efficiency is maximized at all input voltages. This improved efficiency reduces power dissipation and extends battery life. Output Thermal Hysteresis Applications Information Input Bypassing The MAX6029 does not require an input bypass capacitor. For improved transient performance, bypass the input to ground with a 0.1µF ceramic capacitor. Place the capacitor as close to IN as possible. Load Capacitance The MAX6029 does not require an output capacitor for stability. The MAX6029 is stable driving capacitive loads from 0 to 100pF and 0.1µF to 10µF when sourcing current and from 0 to 0.4µF when sinking current. In applications where the load or the supply can experience step changes, an output capacitor reduces the amount of overshoot (undershoot) and improves the circuit’s transient response. Many applications do not require an external capacitor, and the MAX6029 offers a significant advantage in applications where board space is critical. Output thermal hysteresis is the change of the output voltage at TA = +25°C before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the device. Temperature Coefficient vs. Operating Temperature Range for a 1LSB Maximum Error In a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range. Figure 1 shows the maximum allowable reference voltage temperature coefficient to keep the conversion error to less than 1 LSB, as a function of the operating temperature range (TMAX - TMIN) with the converter resolution as a parameter. The graph assumes the reference-voltage temperature coefficient as the only parameter affecting accuracy. In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltage reference changes. Supply Current Turn-On Time The quiescent supply current of the series-mode MAX6029 is very small, 5.25µA (max), and is very stable against changes in the supply voltage with only 1.5µA/V (max) variation with supply voltage. The MAX6029 family draws load current from the input volt- These devices turn on and settle to within 0.1% of their final value in less than 1ms. The turn-on time increases when heavily loaded and operating close to dropout. 10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/°C) 8-BIT 10 10-BIT 12-BIT 1 14-BIT 16-BIT 0.1 18-BIT 0.01 1 10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C) 20-BIT 100 Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error ______________________________________________________________________________________ 13 MAX6029 Pin Description Ultra-Low-Power Precision Series Voltage Reference MAX6029 Typical Operating Circuit VIN = 2.5V TO 12.6V Chip Information TRANSISTOR COUNT: 30 PROCESS: BiCMOS * IN MAX6029 OUT GND *CAPACITOR IS OPTIONAL. 14 ______________________________________________________________________________________ Ultra-Low-Power Precision Series Voltage Reference SOT-23 5L .EPS PACKAGE OUTLINE, SOT-23, 5L 21-0057 E 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 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX6029 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.)