19-0458; Rev 1; 9/96 Low-Cost, Micropower, Precision, 3-Terminal, 1.2V Voltage Reference The MAX6120 is the lowest-power 1.2V, precision, three-terminal voltage reference offered in a SOT23 package. Ideal for 3V battery-powered equipment where power conservation is critical, the MAX6120 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 MAX6120 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 MAX6120 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 30ppm/°C, and is guaranteed to be less than 100ppm/°C in the SOT23 package. For a guaranteed output voltage temperature coefficient of less than 50ppm/°C, see the MAX6520 data sheet. ____________________________Features ♦ 3-Pin SOT23 Package ♦ Supply Current Independent of Input Voltage Over Temperature ♦ 50µA Supply Current ♦ 2.4V to 11V Input Voltage Range ♦ 30ppm/°C Typical Tempco (SOT23) ♦ ±1% Initial Accuracy (SOT23) ______________Ordering Information PART MAX6120ESA MAX6120EUR TEMP. RANGE PIN-PACKAGE -40°C to +85°C -40°C to +85°C 8 SO 3 SOT23-3 ________________________Applications Battery-Powered Systems Portable and Hand-Held Equipment Data-Acquisition Systems _________________Pin Configurations Instrumentation and Process Control TOP VIEW VIN 1 __________Typical Operating Circuit MAX6120 3 GND VOUT 2 V+ 2.4V to 11V SOT23 VIN MAX6120 0.1µF VOUT VOUT 1.2V VOUT 1 N.C. 2 N.C. 3 MAX6120 GND 4 8 VIN 7 N.C. 6 N.C. 5 N.C. GND SO 0V ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 MAX6120 _______________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 MAX6120EUR (SOT23) TCVOUT Output Voltage Noise en MIN TYP MAX UNITS TA = +25°C 1.188 1.200 1.212 V TA = TMIN to TMAX (Note 2) 1.176 1.224 V 100 ppm/°C MAX6120EUR (SOT23), TA = TMIN to TMAX (Note 2) 30 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. Note 2: Contact factory for availability of a higher-grade, lower-TC option in a SOT23 package. __________________________________________Typical Operating Characteristics (VIN = 3V, ILOAD = 0mA, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. INPUT VOLTAGE SUPPLY CURRENT (µA) OUTPUT VOLTAGE (V) 60 1.20005 1.20000 1.19995 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 MAX6120 TOC-02 70 VIN = 9V 65 VIN = 5V 60 VIN = 3V 55 50 1.19990 2 75 MAX6120-02 1.20010 MAX6120 TOC-01 70 50 2 SUPPLY CURRENT vs. TEMPERATURE OUTPUT VOLTAGE vs. INPUT VOLTAGE 80 SUPPLY CURRENT (µA) MAX6120 Low-Cost, Micropower, Precision, 3-Terminal, 1.2V Voltage Reference 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 -50 -25 0 25 50 TEMPERATURE (°C) _______________________________________________________________________________________ 75 100 Low-Cost, Micropower, Precision, 3-Terminal, 1.2V Voltage Reference 0.16 0.08 80 1.2000 PSRR (dB) OUTPUT VOLTAGE (V) 0.24 1.1999 -50 -25 0 25 50 75 100 60 40 1.1998 1.1997 0 100 MAX1620 TOC-05 1.2001 MAX6120 TOC-03 0.32 LOAD REGULATION (µV/µA) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY OUTPUT VOLTAGE vs. SOURCE CURRENT MAX1620 TOC-06 LOAD REGULATION vs. TEMPERATURE 1 10 TEMPERATURE (°C) 1000 100 20 0.001 0.1Hz TO 100Hz NOISE 0.01 0.1 1 10 100 FREQUENCY (kHz) SOURCE CURRENT (µA) LOAD-TRANSIENT RESPONSE A 50µV/div B 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 MAX6120 ____________________________Typical Operating Characteristics (continued) (VIN = 3V, ILOAD = 0mA, TA = +25°C, unless otherwise noted.) _____________________Pin Description NAME 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. FUNCTION SOT23 SO 1 8 VIN 2 1 VOUT Reference Output 3 4 GND Ground — 2, 3, 5, 6, 7 N.C. No Connect—not internally connected +3V VIN 1 __________Applications Information Input Bypassing PIN Input Voltage Output Bypass The MAX6120 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 MAX6120 3 0.1µF 2 0.01µF +3V DIN 1 CS 2 REFAB 12 11 REFC SCLK 3 OUTA DAC LATCH A 8 DAC A VIN 1 VOUT MAX6120 16-BIT SHIFT REGISTER DATA (8) +1.2V 7 2 9 DAC B 6 -1.2V MAX406A 3 DAC LATCH C DAC C OUTC 4 10 -3V MAX512 MAX513 LOUT LATCH 14 4 RESET Figure 1. 3V, Triple, 8-Bit Serial DAC 4 R 2 OUTB DAC LATCH B R 3 CONTROL (8) MAX6120 Low-Cost, Micropower, Precision, 3-Terminal, 1.2V Voltage Reference 5 VDD 7 VSS 6 GND Figure 2. Low-Power ±1.2V Reference ___________________Chip Information TRANSISTOR COUNT: 39 _______________________________________________________________________________________ Low-Cost, Micropower, Precision, 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. MARKING INFORMATION † LOT SPECIFIC CODE AY X X = MAX6120 AND FOLLOW EIA481-1 STANDARD. † ICs MAY ALSO BE MARKED WITH FULL PART NAME: MAX6120 _______________________________________________________________________________________ 5 MAX6120 __________________________________________________Tape-and-Reel Information MAX6120 Low-Cost, Micropower, Precision, 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.