19-1130; Rev 0; 9/96 50ppm/°C, SOT23, 3-Terminal, 1.2V Voltage Reference The MAX6520 is the lowest-power 1.2V, precision, three-terminal voltage reference offered in a SOT23-3 package. Ideal for 3V battery-powered equipment where power conservation is critical, the MAX6520 is a low-power alternative to existing two-terminal shunt references. Unlike two-terminal references that throw away battery current and require an external series resistor, the MAX6520 has a 70µA maximum supply current (typically only 50µA) that is independent of the input voltage. This feature translates to maximum efficiency at all battery voltages. The MAX6520 operates from a supply voltage as low as 2.4V, and initial accuracy is ±1% for the SOT23 package. Output voltage temperature coefficient is typically only 25ppm/°C, and is guaranteed to be less than 50ppm/°C in the SOT23 package. ________________________Applications ____________________________Features ♦ 3-Pin SOT23 Package ♦ 50ppm/°C max Tempco ♦ Supply Current Independent of Input Voltage Over Temperature ♦ 50µA Supply Current ♦ 2.4V to 11V Input Voltage Range ♦ ±1% Initial Accuracy ______________Ordering Information PART MAX6520EUR-T Battery-Powered Systems Portable and Hand-Held Equipment TEMP. RANGE -40°C to +85°C PIN-PACKAGE 3 SOT23-3 * Contact factory for availability. Data-Acquisition Systems Instrumentation and Process Control __________Typical Operating Circuit V+ 2.4V to 11V __________________Pin Configuration TOP VIEW VIN MAX6520 0.1µF VOUT VOUT 1.2V VIN 1 MAX6520 3 GND VOUT 2 GND SOT23 0V ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 MAX6520 _______________General Description ABSOLUTE MAXIMUM RATINGS Supply Voltage (VIN) ..............................................-0.3V to +12V VOUT ............................................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration ..........Continuous to Either Supply Continuous Power Dissipation (TA = +70°C) SOT23 (derate 4mW/°C above +70°C) ...........................320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+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. DC ELECTRICAL CHARACTERISTICS (VIN = 2.4V, ILOAD = 0mA, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL Output Voltage VOUT Output Voltage Temperature Coefficient CONDITIONS MAX6520EUR TCVOUT Output Voltage Noise en MIN TYP MAX UNITS TA = +25°C 1.188 1.200 1.212 V TA = TMIN to TMAX 1.176 1.224 V 50 ppm/°C MAX6520EUR, TA = TMIN to TMAX 25 0.1Hz to 10Hz 10 10Hz to 10kHz 400 Line Regulation VOUT/VIN Load Regulation VOUT/IOUT ILOAD = -50µA to 400µA (Note 1) IQ Change in Supply Current vs. Input Voltage IQ/VIN Short-Circuit Output Current VIN = 2.4V to 11V, TA = TMIN to TMAX (Note 1) TA = +25°C Quiescent Supply Current µVp-p 2 30 µV/V 0.1 1 µV/µA 50 58 TA = TMIN to TMAX (Note 1) VIN = 2.4V to 11V ISC µA 70 1.5 5 µA/V VOUT shorted to GND 4.3 mA VOUT shorted to VIN 400 µA Note 1: Production testing done at TA = +25°C, over temperature limits guaranteed by parametric correlation data. __________________________________________Typical Operating Characteristics (VIN = 3V, ILOAD = 0mA, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE vs. INPUT VOLTAGE 60 MAX6520-02 1.20005 1.20000 1.19995 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 70 VIN = 9V 65 VIN = 5V 60 VIN = 3V 55 1.19990 2 75 SUPPLY CURRENT (µA) OUTPUT VOLTAGE (V) 70 50 2 1.20010 MAX6520 TOC-01 80 SUPPLY CURRENT vs. TEMPERATURE MAX6520 TOC-02 SUPPLY CURRENT vs. INPUT VOLTAGE SUPPLY CURRENT (µA) MAX6520 50ppm/°C, SOT23, 3-Terminal, 1.2V Voltage Reference 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 50 -50 -25 0 25 50 TEMPERATURE (°C) _______________________________________________________________________________________ 75 100 50ppm/°C, SOT23, 3-Terminal, 1.2V Voltage Reference 0.16 0.08 100 1.2000 PSRR (dB) OUTPUT VOLTAGE (V) 0.24 1.1999 -50 -25 0 25 50 75 100 80 60 1.1998 1.1997 0 120 MAX6520 TOC-05 1.2001 MAX6520 TOC-03 0.32 LOAD REGULATION (µV/µA) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY OUTPUT VOLTAGE vs. SOURCE CURRENT MAX6520 TOC-06 LOAD REGULATION vs. TEMPERATURE 1 10 TEMPERATURE (°C) 1000 100 40 0.0001 0.001 0.1Hz TO 100Hz NOISE 0.01 0.1 .01 .10 FREQUENCY (kHz) SOURCE CURRENT (µA) LOAD-TRANSIENT RESPONSE A B 50µV/div 10µs/div 1µs/div A = OUTPUT CURRENT, 50µA/div, ILOAD = 0µA TO -50µA B = OUTPUT VOLTAGE, 100mV/div LOAD-TRANSIENT RESPONSE LINE-TRANSIENT RESPONSE A IN A OUT B B 10µs/div A = OUTPUT CURRENT, 500µA/div, ILOAD = 0µA TO 500µA B = OUTPUT VOLTAGE, 100mV/div 5µs/div A = INPUT VOLTAGE, 100mV/div, VIN = 3V ± 50mV B = OUTPUT VOLTAGE, 10mV/div _______________________________________________________________________________________ 3 MAX6520 ____________________________Typical Operating Characteristics (continued) (VIN = 3V, ILOAD = 0mA, TA = +25°C, unless otherwise noted.) _____________________Pin Description PIN NAME 1 VIN 2 VOUT Reference Output 3 GND Ground __________Applications Information Input Bypassing FUNCTION For the best line-transient performance, decouple the input with a 0.1µF ceramic capacitor as shown in the Typical Operating Circuit . Locate the capacitor as close to the device pin as possible. Where transient performance is less important, no capacitor is necessary. Input Voltage Output Bypass VIN +3V 1 The MAX6520 performs well without an output decoupling capacitor. If your application requires an output charge reservoir (e.g., to decouple the reference from the input of a DAC), then make sure that the total output capacitive load does not exceed 10nF. VOUT MAX6520 3 0.1µF DIN 1 2 0.01µF CS 2 REFAB 12 11 REFC SCLK 3 OUTA DAC LATCH A +3V 8 DAC A 16-BIT SHIFT REGISTER DATA (8) OUTB DAC LATCH B 9 DAC B VIN 1 VOUT MAX6520 R R 2 3 DAC LATCH C OUTC +1.2V DAC C 7 2 10 6 -1.2V MAX406A CONTROL (8) MAX6520 50ppm/°C, SOT23, 3-Terminal, 1.2V Voltage Reference 3 MAX512 MAX513 4 LOUT -3V LATCH 14 4 RESET 5 VDD 7 VSS 6 GND Figure 2. Low-Power ±1.2V Reference Figure 1. 3V, Triple, 8-Bit Serial DAC ___________________Chip Information TRANSISTOR COUNT: 39 4 _______________________________________________________________________________________ 50ppm/°C, SOT23, 3-Terminal, 1.2V Voltage Reference 4.0±0.1 ø1.5±0.1 2.0±0.05 1.75±0.1 8.0±0.2 4.0±0.1 3.5±0.05 ø1.1±0.1 NOTE: DIMENSIONS ARE IN MM. AND FOLLOW EIA481-1 STANDARD. MARKING INFORMATION † LOT SPECIFIC CODE AY X X = MAX6520 † ICs MAY ALSO BE MARKED WITH FULL PART NAME: MAX6520 _______________________________________________________________________________________ 5 MAX6520 __________________________________________________Tape-and-Reel Information MAX6520 50ppm/°C, SOT23, 3-Terminal, 1.2V Voltage Reference ________________________________________________________Package Information DIM B E A A1 B C D E e H L S α H S INCHES MAX MIN 0.047 0.031 0.005 0.001 0.022 0.014 0.0034 0.006 0.120 0.105 0.055 0.047 0.080 0.070 0.098 0.082 0.012 0.004 0.022 0.017 8˚ 0˚ MILLIMETERS MIN MAX 0.787 1.194 0.025 0.127 0.356 0.559 0.086 0.152 2.667 3.048 1.194 1.397 1.778 2.032 2.083 2.489 0.102 0.305 0.432 0.559 0˚ 8˚ 21-0051B D α A A1 e C 3-PIN SOT23-3 SMALL-OUTLINE TRANSISTOR PACKAGE L 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. 6 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.