MAX6033 High-Precision, Low-Dropout SOT23 Series Voltage Reference
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1 MAX633 High-Precision, Low-Dropout SOT23 Series General Description The MAX633 ultra-high-precision series voltage reference features a low 7ppm/ C (max) temperature coefficient and a low dropout voltage (2mV, max). Low temperature drift and low noise make the MAX633 ideal for use with high-resolution ADCs or DACs. This device uses bandgap technology for low-noise performance and excellent accuracy. Laser-trimmed, highstability, thin-film resistors, and postpackage trimming guarantee excellent initial accuracy (±.4%, max). The MAX633 consumes only 4µA of supply current and sources up to 15mA. Series mode references save system power and use minimal external components compared to two-terminal shunt references. The MAX633 is available in the miniature 6-pin SOT23 package and is offered over the automotive temperature range (-4 C to +125 C). Features Tiny 6-Pin SOT23 Package Ultra-Low Temperature Drift: 7ppm/ C (max) ±.4% Initial Accuracy Stable with Capacitive Loads Low 16µV P-P Noise (.1Hz to 1Hz) ( Output) 15mA Output Source Current Low 2mV Dropout Voltage Low 4µA Quiescent Current Wide 2.7V to 12.6V Supply Voltage Excellent Load Regulation:.1mV/mA Pin Configuration Applications TOP VIEW Precision Regulators A/D and D/A Converters I.C.* OUTS Power Supplies Hard-Disk Drives GND 2 MAX633 5 OUTF High-Accuracy Industrial and Process Control Hand-Held Instruments I.C.* 3 4 IN Typical Operating Circuit appears at end of data sheet. SOT23 *I.C. = INTERNALLY CONNECTED: DO NOT USE Ordering Information/Selector Guide PART OUTPUT VOLTAGE (V) TEMP COEFF (ppm/ C) INITIAL ACCURACY (%) TOP MARK MAX633AAUT25-T ABDF MAX633AAUT25#TG #ACNC MAX633BAUT25-T AAXL MAX633BAUT25#TG #ACND MAX633CAUT25-T AAXH MAX633CAUT25#TG #ACNE MAX633AAUT3-T ABDG MAX633AAUT3#TG #ACNF MAX633BAUT3-T AAXM MAX633BAUT3#TG #ACNG Ordering Information/Selector Guide continued on last page. #Denotes a RoHS-compliant device that may include lead(pb) that is exempt under the RoHS requirements. T = Tape and reel. For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at ; Rev 3; 3/12
2 MAX633 ABSOLUTE MAXIMUM RATINGS IN to GND...-.3V to +13V OUTF, OUTS to GND...-.3V to +6V Continuous Power Dissipation (T A = +7 C) 6-Pin SOT23 (derate 9.1mW/ C above +7 C)...727mW Operating Temperature Range...-4 C to +125 C Storage Temperature Range C to +15 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 VOUT = Maximum Junction Temperature C Lead Temperature (soldering, 1s)...+3 C Soldering Temperature (reflow) RoHS-Compliant Packages C Packages Containing Lead(Pb) C ( = 5V, C OUT =.1µF, I OUT = A, T A = T MIN to T MAX, unless otherwise specified. Typical values are at.) (Note 1) MAX633A Output Voltage MAX633B V MAX633C MAX633A Output-Voltage Accuracy MAX633B % MAX633C MAX633A T A = -4 o C to +85 o C T A = -4 o C to +125 o C Output Voltage Temperature T A = -4 o C to +85 o C 3 1 TC MAX633B Coefficient T A = -4 o C to +125 o C 7 15 ppm/ C MAX633C T A = -4 o C to +85 o C 6 2 T A = -4 o C to +125 o C 1 4 Input Voltage Range Inferred from line regulation specification V Line Regulation / V 12.6V T A = -4 C to +125 C 5 µv/v Load Regulation / -1µA I OUT.1.5 I OUT 15mA T A = -4 C to +125 C.1 mv/ma =.1%, I OUT = 1mA.2.2 Dropout Voltage (Note 2) V DO VOUT =.1%, T A = -4 o C to +85 o C.3.4 V I OUT = 1mA T A = - 4 o C to o C.5 T A = +25 o C 4 6 Quiescent Supply Current I IN T A = -4 o C to +85 o C 75 T A = -4 o C to +125 o C 85 µa = V 9 Output Short-Circuit Current I SC = -2 ma Output-Voltage Noise e n.1hz f 1Hz 16 µv P-P 1Hz f 1kHz 12 µv RMS Turn-On Settling Time t ON settles to ±.1% of final value 5 µs Temperature Hysteresis (Note 3) 15 ppm Long-Term Stability t = 1hr 4 ppm 2 Maxim Integrated
3 MAX633 ELECTRICAL CHARACTERISTICS VOUT = 3.V ( = 5V, C OUT =.1µF, I OUT = A, T A = T MIN to T MAX, unless otherwise specified. Typical values are at.) (Note 1) Quiescent Supply Current I IN MAX633A Output Voltage T A = +25 o C MAX633B V MAX633C MAX633A Output-Voltage Accuracy T A = +25 o C MAX633B % MAX633C MAX633A T A = -4 o C to +85 o C T A = -4 o C to +125 o C Output-Voltage Temperature T A = -4 o C to +85 o C 3 1 TC MAX633B Coefficient T A = -4 o C to +125 o C 7 15 ppm/ C MAX633C T A = -4 o C to +85 o C 6 2 T A = -4 o C to +125 o C 1 4 Input Voltage Range Inferred from line regulation specification V Line Regulation / V 12.6V T A = -4 C to +125 C 6 µv/v Load Regulation / -1µA I OUT.2.6 I OUT 15mA T A = -4 C to +125 C.12 mv/ma Dropout Voltage (Note 2) V DO =.1% I OUT = 1mA.2.2 I OUT = 1mA.2.4 V 4 6 T A = -4 C to +85 C 75 µa T A = -4 C to +125 C 85 = V 9 Output Short-Circuit Current I SC = -2 ma Output-Voltage Noise e n.1hz f 1Hz 24 µv P-P 1Hz f 1kHz 15 µv RMS Turn-On Settling Time t ON settles to ±.1% of final value 6 µs Temperature Hysteresis (Note 3) 15 ppm Long-Term Stability t = 1hr 4 ppm ELECTRICAL CHARACTERISTICS VOUT = 4.96V ( = 5V, C OUT =.1µF, I OUT = A, T A = T MIN to T MAX, unless otherwise specified. Typical values are at.) (Note 1) MAX633A Output Voltage MAX633B V MAX633C MAX633A Output-Voltage Accuracy MAX633B % MAX633C Maxim Integrated 3
4 MAX633 ELECTRICAL CHARACTERISTICS VOUT = 4.96V (continued) ( = 5V, C OUT =.1µF, I OUT = A, T A = T MIN to T MAX, unless otherwise specified. Typical values are at.) (Note 1) Quiescent Supply Current I IN MAX633A T A = -4 o C to +85 o C T A = -4 o C to +125 o C Output-Voltage Temperature T A = -4 o C to +85 o C 3 1 TC MAX633B Coefficient T A = -4 o C to +125 o C 7 15 ppm/ C MAX633C T A = -4 o C to +85 o C 6 2 T A = -4 o C to +125 o C 1 4 Input-Voltage Range Inferred from line regulation specification V Line Regulation / V 12.6V T A = -4 o C to +125 o C 6 µv/v Load Regulation / -1µA I OUT.2.8 I OUT 15mA T A = -4 o C to +125 o C.15 mv/ma Dropout Voltage (Note 2) V DO =.1% I OUT = 1mA.2.2 I OUT = 1mA.2.4 V 4 6 T A = -4 C to +85 C 75 µa T A = -4 o C to +125 o C 85 = V 9 Output Short-Circuit Current I SC = -2 ma Output-Voltage Noise e n.1hz f 1Hz 32 µv P-P 1Hz f 1kHz 22 µv RMS Turn-On Settling Time t ON settles to ±.1% of final value 8 µs Temperature Hysteresis (Note 3) 15 ppm Long-Term Stability t = 1hr 4 ppm ELECTRICAL CHARACTERISTICS VOUT = 5.V ( = 5.5V, C OUT =.1µF, I OUT = A, T A = T MIN to T MAX, unless otherwise specified. Typical values are at.) (Note 1) MAX633A Output Voltage MAX633B V MAX633C MAX633A Output-Voltage Accuracy MAX633B % MAX633C MAX633A T A = -4 o C to +85 o C T A = -4 o C to +125 o C Output-Voltage Temperature T A = -4 o C to +85 o C 3 1 TC MAX633B Coefficient T A = -4 o C to +125 o C 7 15 ppm/ C MAX633C T A = -4 o C to +85 o C 6 2 T A = -4 o C to +125 o C 1 4 Input Voltage Range Inferred from line regulation specification V 4 Maxim Integrated
5 Line Regulation Load Regulation MAX633 ELECTRICAL CHARACTERISTICS VOUT = 5.V (continued) ( = 5.5V, C OUT =.1µF, I OUT = A, T A = T MIN to T MAX, unless otherwise specified. Typical values are at.) (Note 1) / 5.2V 12.6V / I OUT Dropout Voltage (Note 2) V DO =.1% 7 5 T A = -4 o C to +125 o C 1-1µA I OUT mA T A = -4 o C to +125 o C.2 I OUT = 1mA.2.2 I OUT = 1mA Quiescent Supply Current I IN T A = -4 C to +85 C 75 T A = -4 o C to +125 o C 85 µv/v mv/ma V µa = V 9 Output Short-Circuit Current I SC = -2 ma.1hz f 1Hz 4 µv P-P Output-Voltage Noise e n 1Hz f 1kHz 26 µv RMS Turn-On Settling Time t ON settles to ±.1% of final value 1 µs Temperature Hysteresis (Note 3) 15 ppm Long-Term Stability t = 1hr 4 ppm Note 1: MAX633 is 1% production tested at and is guaranteed by design for T A = T MIN to T MAX as specified. Note 2: Dropout Voltage is the minimum input voltage at which changes.1% from at = 5V ( = 5.5V for = 5V). Note 3: Temperature Hysteresis is defined as the change in +25 C output voltage before and after cycling the device from T MAX to T MIN. Typical Operating Characteristics ( = 5V, C OUT =.1µF, I OUT = A,, unless otherwise specified.) (Note 4) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE vs. TEMPERATURE TYPICAL UNITS TEMPERATURE ( C) MAX633 toc1 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE vs. TEMPERATURE ( = 5V) TYPICAL UNITS TEMPERATURE ( C) MAX633 toc2 OUTPUT VOLTAGE (V) LOAD REGULATION T A = -4 C OUTPUT CURRENT (ma) MAX633 toc3 Maxim Integrated 5
6 MAX633 Typical Operating Characteristics (continued) ( = 5V, C OUT =.1µF, I OUT = A,, unless otherwise specified.) (Note 4) OUTPUT VOLTAGE (V) LOAD REGULATION ( = 5V) T A = -4 C OUTPUT CURRENT (ma) MAX633 toc4 DROPOUT VOLTAGE (mv) DROPOUT VOLTAGE vs. OUTPUT CURRENT T A = -4 C OUTPUT CURRENT (ma) MAX633 toc5 DROPOUT VOLTAGE (mv) DROPOUT VOLTAGE vs. OUTPUT CURRENT ( = 5V) T A = -4 C OUTPUT CURRENT (ma) MAX633 toc6 PSRR (db) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX633 toc7 PSRR (db) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY ( = 5V) MAX633 toc8 SUPPLY CURRENT (µa) SUPPLY CURRENT vs. INPUT VOLTAGE MAX633 toc T A = -4 C FREQUENCY (khz) FREQUENCY (khz) INPUT VOLTAGE (V) SUPPLY CURRENT (µa) SUPPLY CURRENT vs. INPUT VOLTAGE ( = 5V) T A = -4 C INPUT VOLTAGE (V) MAX633 toc1.1hz TO 1Hz OUTPUT NOISE MAX633 toc11 1s/div 4µV/div.1Hz TO 1Hz OUTPUT NOISE ( = 5V) MAX633 toc12 1s/div 1µV/div 6 Maxim Integrated
7 MAX633 Typical Operating Characteristics (continued) ( = 5V, C OUT =.1µF, I OUT = A,, unless otherwise specified.) (Note 4) LOAD TRANSIENT MAX633 toc13 LOAD TRANSIENT MAX633 toc14 = 5V C OUT =.1µF 5mV/div = 5V C OUT =.1µF 5mV/div 1mA 1mA -1µA I OUT 1mA/div 4µs/div I OUT 1mA/div 1ms/div LOAD TRANSIENT MAX633 toc15 LOAD TRANSIENT MAX633 toc16 = 5V C OUT = 1µF = 5V C OUT = 1µF 2mV/div 5mV/div 1mA 1mA I OUT 1mA/div -1µA I OUT 1mA/div 4µs/div 1ms/div LINE TRANSIENT MAX633 toc17 LINE TRANSIENT ( = 5V) MAX633 toc18 5.5V C OUT =.1µF 6.5V C OUT =.1µF 4.5V 5mV/div 5.5V 5mV/div 1mV/div 5V 1mV/div 4µs/div 1ms/div Maxim Integrated 7
8 MAX633 Typical Operating Characteristics (continued) ( = 5V, C OUT =.1µF, I OUT = A,, unless otherwise specified.) (Note 4) TURN-ON TRANSIENT MAX633 toc19 TURN-ON TRANSIENT ( = 5V) MAX633 toc2 TURN-ON TRANSIENT MAX633 toc21 5V 5.5V 5V 1V/div 5V 1V/div C OUT =.1µF C OUT =.1µF C OUT = 1µF 1µs/div 4µs/div 2ms/div 5.5V TURN-ON TRANSIENT ( = 5V) MAX633 toc LONG-TERM STABILITY vs. TIME 5 TYPICAL UNITS MAX633 toc LONG-TERM STABILITY vs. TIME ( = 5V) 5 TYPICAL UNITS MAX633 toc24 5V VOUT (V) VOUT (V) ms/div C OUT = 1µF TIME (HOURS) TIME (HOURS) Note 4: Many of the MAX633 Typical Operating Characteristics are similar. The extremes of these characteristics are found in the MAX633 ( output) and the MAX633 (5V output). The Typical Operating Characteristics of the remainder of the MAX633 family typically lie between these two extremes and can be estimated based on their output voltages. 8 Maxim Integrated
9 MAX633 Pin Description PIN NAME FUNCTION 1, 3 I.C. Internally Connected. Do not connect externally. 2 GND Ground 4 IN Positive Power-Supply Input 5 OUTF Force Output. Short OUTF to OUTS as close to the device as possible. Bypass OUTF with.1µf (min) capacitor to GND. 6 OUTS Sense IN MAX633 OUTF OUTS GND Figure 1. Precision Current Source I SOURCE Applications Information Bypassing/Load Capacitance For the best line-transient performance, decouple the input with a.1µf ceramic capacitor as shown in the Typical Operating Circuit. Place the capacitor as close to IN as possible. When transient performance is less important, no capacitor is necessary. The MAX633 family requires a minimum output capacitance of.1µf for stability and is stable with capacitive loads (including the bypass capacitance) of up to 1µF. In applications where the load or the supply can experience step changes, a larger output capacitor reduces the amount of overshoot (undershoot) and improves the circuit s transient response. Place output capacitors as close to the device as possible. Supply Current The quiescent supply current of the MAX633 series reference is typically 4µA and is virtually independent of the supply voltage. In the MAX633 family, the load current is drawn from the input 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. When the supply voltage is below the minimum-specified input voltage (as during turn-on), the devices can draw up to 15µA beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on. Output-Voltage Hysteresis Output voltage hysteresis is the change in the output voltage at before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the bandgap core transistors. The typical temperature hysteresis value is 15ppm. IN MAX633 GND OUT 3V SUPPLY Turn-On Time These devices typically turn on and settle to within.1% of their final value in >1µs. The turn-on time can increase up to 2ms with the device operating at the minimum dropout voltage and the maximum load. Precision Current Source Figure 1 shows a typical circuit providing a precision current source. The OUTF output provides the bias current for the bipolar transistor. OUTS senses the voltage across the resistor and adjusts the current sourced by OUTF accordingly. High-Resolution DAC and Reference from Single Supply Figure 2 shows a typical circuit providing both the power supply and reference for a high-resolution DAC. A MAX633 with output provides the reference voltage for the DAC. REF V DD MAX5143 DAC OUT ANALOG OUTPUT Figure Bit High-Resolution DAC and Positive Reference from a Single 3V Supply GND Maxim Integrated 9
10 MAX633 PART Ordering Information/Selector Guide (continued) OUTPUT VOLTAGE (V) TEMP COEFF (ppm/ C) INITIAL ACCURACY (%) TOP MARK MAX633CAUT3-T AAXI MAX633CAUT3#TG #ACNH MAX633AAUT41-T ABDH MAX633AAUT41#TG #ACNI MAX633BAUT41-T AAXN MAX633BAUT41#TG #ACLG MAX633CAUT41-T AAXJ MAX633CAUT41#TG #ACNJ MAX633AAUT5-T ABDI MAX633AAUT5#TG #ACNK MAX633BAUT5-T AAXO MAX633BAUT5#TG #ACNL MAX633CAUT5-T AAXK MAX633CAUT5#TG #ACNM #Denotes a RoHS-compliant device that may include lead(pb) that is exempt under the RoHS requirements. T = Tape and reel. Typical Operating Circuit SUPPLY INPUT PROCESS: BiCMOS Chip Information IN OUTS OUTF.1µF* MAX633 GND *INPUT CAPACITOR IS OPTIONAL REFERENCE OUTPUT.1µF (min) Package Information For the latest package outline information and land patterns (footprints), go to 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. SOT23-6 U6F RoHS SOT23-6 UGFH-6 1 Maxim Integrated
11 REVISION NUMBER REVISION DATE MAX633 DESCRIPTION Revision History PAGES CHANGED 2 6/3 Various changes 3 3/12 Replaced Ordering Information table/selector Guide, updated packaging information 1, 1 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated 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. Maxim Integrated 16 Rio Robles, San Jose, CA USA Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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