19-5803; Rev 0; 3/11 KIT ATION EVALU E L B A IL AVA Low-Power Comparators with Precision Reference in 4-Bump UCSP The MAX9644/MAX9645/MAX9646 are small, single comparators, ideal for a wide variety of portable electronics applications such as cell phones, media players, and notebooks that have extremely tight board space and power constraints. These comparators are offered in both a miniature 4-bump UCSP™ package with a 1mm x 1mm footprint (as small as two 0402 resistors) and a 5-pin SOT23 package. The ICs feature an input voltage range of -0.3V to +5.5V, independent of supply voltage. These devices maintain high impedance at the inputs even when powered down (VCC or VREF = 0V). They also feature internal filtering to provide high RF immunity. The ICs have an internal 0.2V reference. These devices feature either a push-pull or an open-drain output. They consume only 700nA (max) supply current and operate down to VCC = 1V over the extended -40°C to +85°C temperature range. Features o Tiny, 1mm x 1mm x 0.6mm 4-Bump UCSP Footprint = Two 0402 Resistors Also Available in a 5-Pin SOT23 Package o Ultra-Low Operating Current (100nA max) o -0.3V to +5.5V Input Voltage Range o Internal 0.2V Reference Trimmed to 1% Accuracy o 15µs Propagation Delay o -40°C to +85°C Extended Temperature Range Ordering Information PART PIN-PACKAGE TOP MARK 4 UCSP +AGL MAX9644EUK+ 5 SOT23 +AFJN MAX9645EBS+G45 4 UCSP +AGM MAX9645EUK+ 5 SOT23 +AFJO Portable Media Players MAX9646EBS+G45 4 UCSP +AGN Electronic Toys MAX9646EUK+ 5 SOT23 +AFJP Notebook Computers Note: All devices are specified over the extended -40°C to +85°C operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. G45 = Protective die coating. Applications Cell Phones Portable Medical Devices MAX9644EBS+G45 Selector Guide PART REFERENCE VOLTAGE (V) INPUT OUTPUT MAX9644 0.2 Noninverting Open drain MAX9645 0.2 Inverting Open drain MAX9646 0.2 Noninverting Push-pull UCSP is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX9644/MAX9645/MAX9646 General Description MAX9644/MAX9645/MAX9646 Low-Power Comparators with Precision Reference in 4-Bump UCSP ABSOLUTE MAXIMUM RATINGS VCC, REF, IN to GND................................................-0.3V to +6V OUT to GND (MAX9644/MAX9645)..........................-0.3V to +6V OUT to GND (MAX9646 only) .................-0.3V to + (VCC + 0.3V) Output Short-Circuit Current Duration ....................................10s Input Current into Any Terminal........................................±20mA Continuous Power Dissipation 4-Bump UCSP (derate 3.0mW/°C above +70°C) .......238 mW 5-Pin SOT23 (derate 3.9mW/°C above +70°C)...........312 mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Bump Temperature (soldering) Reflow............................+235°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) .......................................+260°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 (VCC = 3.3V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, TA = -40°C to +85°C. Typical values at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Input Voltage Range VIN Guaranteed by IIN test +5.5 V Input Bias Current IIN VIN = 0.2V to 5.5V (Note 2) 0.06 15 nA VCC = 0, VIN = 5.5V (Note 2) < 0.1 15 nA Input Leakage Current Output Voltage Low IIN_SHDN VOL -0.3 ISINK = 50µA, VCC = 1.0V 0.03 0.2 ISINK = 200µA, VCC = 1.2V 0.08 0.20 ISINK = 500µA, VCC = 1.8V 0.13 0.23 ISINK = 0.75mA, VCC = 3.3V 0.14 0.3 ISINK = 1.2mA, VCC = 5.5V 0.19 0.5 VCC - 0.08V VCC - 0.2V ISOURCE = 40µA, VCC = 1.2V VCC - 0.08V VCC - 0.20V ISOURCE = 180µA, VCC = 1.8V VCC - 0.15V VCC - 0.23V ISOURCE = 0.3mA, VCC = 3.3V VCC - 0.13V VCC - 0.3V ISOURCE = 0.75mA, VCC = 5.5V VCC - 0.24V VCC - 0.5V < 0.1 15 ISOURCE = 15µA, VCC = 1.0V Output Voltage High (MAX9464 Only) Output Leakage Current (MAX9644/MAX9645 Only) VOH OUT = high, VPULLUP = 5.5V IOUT_LEAKAGE (Note 2) V V nA AC CHARACTERISTICS Propagation Delay VOVERDRIVE = ±100mV (Note 3) 15 µs Fall Time tPD tF CL = 10pF 14 ns Rise Time tR CL = 10pF, MAX9646 only 30 ns MAX964_EBS+ 200 MAX964_EUK+ 199 REFERENCE VOLTAGE Input Threshold (Note 4) Input Threshold Error (Note 4) Input Threshold Hysteresis REF Tempco Power-Supply Rejection Ratio 2 VREF Delta-VREF VHYS VREF_TEMPCO PSRR TA = +25°C TA = -40°C to +85°C -1 +1 -3.5 +3.5 TA = -40°C to +85°C (Note 5) (Note 6) VCC = 1.0V to 5.5V mV 40 % ±0.9 mV 6 µV/°C 53 dB _______________________________________________________________________________________ Low-Power Comparators with Precision Reference in 4-Bump UCSP (VCC = 3.3V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, TA = -40°C to +85°C. Typical values at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V POWER SUPPLY Supply Voltage VCC Supply Current ICC Power-Up Time tON Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Guaranteed by VOL/VOH tests 1.0 VCC = 1.0V 0.4 0.7 VCC = 5.5V 0.6 1.1 µA 3 ms All devices are 100% production tested at TA = +25°C. Temperature limits are guaranteed by design. Too small to be measured in an ATE test environment. Only gross test to catch failures is implemented. Overdrive is defined as the voltage above or below the switching points. Guaranteed by ATE and/or bench characterization over temperature. VREF is the average of the trip points. Hysteresis is half the input voltage difference between the two switching points. Includes reference error along with comparator offset voltage error. Typical Operating Characteristics (VCC = 3.3V, VREF = 1.8V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, GND = 0, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY +25°C 600 400 VCC = 5V 10 0.9 OUTPUT VOLTAGE LOW (V) SUPPLY CURRENT (µA) +85°C 1.0 MAX9644 toc02 800 SUPPLY CURRENT (nA) 100 MAX9644 toc01 1000 OUTPUT VOLTAGE LOW vs. SINK CURRENT VCC = 3.3V VCC = 1.8V 200 MAX9644 toc03 SUPPLY CURRENT vs. SUPPLY VOLTAGE 0.8 0.7 0.6 0.5 VREF = 5V 0.4 0.3 VREF = 3.3V 0.2 -40°C 1 0 0 1 2 VREF = 1.8V 0.1 3 4 SUPPLY VOLTAGE (V) 5 6 0 0.1 1 10 OUTPUT TRANSITION FREQUENCY (kHz) 100 0 2 4 6 8 SINK CURRENT (mA) _______________________________________________________________________________________ 3 MAX9644/MAX9645/MAX9646 ELECTRICAL CHARACTERISTICS Typical Operating Characteristics (VCC = 3.3V, VREF = 1.8V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, GND = 0, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT (MAX9646) INPUT BIAS CURRENT vs. INPUT BIAS VOLTAGE 0.9 INPUT BIAS CURRENT (nA) 0.8 0.7 0.6 0.5 VCC = 5V 0.4 0.3 VCC = 3.3V -5 -10 VCC = 1.8V 0.1 VCC = 3.3V -20 0.5 1.0 1.5 2.0 2.5 3.0 0 0.05 0.10 0.15 0.20 0.25 SOURCE CURRENT (mA) INPUT BIAS VOLTAGE (V) REFERENCE VOLTAGE vs. TEMPERATURE REFERENCE VOLTAGE vs. SUPPLY VOLTAGE VCC = 3.3V 201.9 201.0 200.8 REFERENCE VOLTAGE (mV) 201.8 201.7 201.6 201.5 201.4 201.3 0.30 MAX9644 toc07 202.0 MAX9644 toc11 0 200.6 200.4 200.2 200.0 199.8 199.6 201.2 199.4 201.1 199.2 201.0 199.0 -15 10 35 60 85 1.0 1.5 2.0 2.5 3.0 3.5 4.0 TEMPERATURE (°C) SUPPLY VOLTAGE (V) PROPAGATION DELAY vs. TEMPERATURE PROPAGATION DELAY vs. INPUT OVERDRIVE VOD = ±100mV 16 15 VCC = 5V 14 13 VCC = 3.3V 12 VCC = 1.8V 11 10 4.5 5.0 80 70 PROPAGATION DELAY (µs) 17 MAX9644 toc08 -40 MAX9644 toc09 REFERENCE VOLTAGE (mV) 0 -15 0.2 0 60 50 VCC = 1.8V 40 VCC = 3.3V 30 VCC = 5V 20 10 0 9 -40 -15 10 35 TEMPERATURE (°C) 4 MAX9644 toc05 5 MAX9644 toc04 OIUTPUT VOLTAGE HIGH (VCC - VOH, V) 1.0 PROPAGATION DELAY (µs) MAX9644/MAX9645/MAX9646 Low-Power Comparators with Precision Reference in 4-Bump UCSP 60 85 0 50 100 150 200 250 INPUT OVERDRIVE (mV) _______________________________________________________________________________________ Low-Power Comparators with Precision Reference in 4-Bump UCSP MAX9644 toc10 202.0 0.3V VCC = 3.3V 201.9 REFERENCE VOLTAGE (mV) IN+ 100mV/div 0.1V OUT 2V/div 0V MAX9644 toc11 REFERENCE VOLTAGE vs. TEMPERATURE PROPAGATION DELAY AT VCC = 3.3V 201.8 201.7 201.6 201.5 201.4 201.3 201.2 201.1 201.0 100µs/div -40 -15 10 35 60 85 OUTPUT RESPONSE TO SUPPLY VOLTAGE TRANSIENT POWER-UP/POWER-DOWN RESPONSE MAX9644 toc12 MAX9644 toc13 VIN = 0.3V VCC = 3.3V 3.2V VIN = VTH + 1mV 3V VCC 200mV/div OUT 2V/div VCC 2V/div 0V OUT 2V/div 0V VIN = VTH + 10mV 0V VIN = VTH + 20mV 0V OUT 2V/div OUT 2V/div 0V 1ms/div 1ms/div POWER-SUPPLY REJECTION FOR NO FALSE TRIGGERING MAX9644 toc14 206 TRIP POINT (mV) 204 202 UPPER TRIP POINT 200 198 LOWER TRIP POINT 196 VCC = 3.3V + 100mVP-P 194 10 100 1k 10k 100k 1M FREQUENCY (Hz) _______________________________________________________________________________________ 5 MAX9644/MAX9645/MAX9646 Typical Operating Characteristics (continued) (VCC = 3.3V, VREF = 1.8V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, GND = 0, TA = +25°C, unless otherwise noted.) Low-Power Comparators with Precision Reference in 4-Bump UCSP MAX9644/MAX9645/MAX9646 Pin Configuration TOP VIEW (BUMPS ON BOTTOM) OUT VCC A1 A2 B2 UCSP 1 GND 2 GND 3 5 OUT 4 IN IN MAX9644 MAX9645 MAX9646 B1 + VCC MAX9644 MAX9645 MAX9646 GND SOT23 Pin Description PIN 6 NAME UCSP SOT23 A1 5 OUT A2 4 IN FUNCTION Comparator Output. The MAX9644/MAX9645 have open-drain outputs. The MAX9646 has a push-pull output. Comparator Input. The MAX9644/MAX9646 have noninverting inputs. The MAX9645 has inverting inputs. B1 1 VCC Power-Supply Voltage. Bypass to ground with a 0.1µF bypass capacitor. B2 2, 3 GND Ground _______________________________________________________________________________________ Low-Power Comparators with Precision Reference in 4-Bump UCSP The MAX9644/MAX9645/MAX9646 are extremely small comparators ideal for compact, low-current, and lowvoltage applications. The ICs consume only 400nA (typ). The low-voltage operating capability of the operating current makes these devices extremely attractive to long-life batteryoperated devices—these applications can now use a single digital power-supply rail to power the new generation of microcontrollers (which can be down to 0.9V). All parts are available in a tiny 4-bump UCSP, which is only 0.6mm tall and occupies a 1mm x 1mm footprint and a 5-pin SOT23. Input Stage Circuitry Noninverting inputs are available on the MAX9644/ MAX9646 and inverting inputs are available on the MAX9645. The MAX9644/MAX9645/MAX9646 incorporate an innovative input stage architecture that allows their input voltage to exceed VCC by several volts (limited only by the Absolute Maximum Ratings). This is unlike traditional comparators that have an input ESD diode clamp between the input and VCC, limiting this maximum overvoltage to about 0.3V. The ICs architecture maintains a high input impedance to input signals even when the device power-supply voltage is completely turned off (VCC or REF taken to 0V). This greatly benefits flexible power-saving schemes to be easily implemented in advanced battery-operated devices. On-chip filtering provides immunity from any RF noise being picked up by input traces. These devices feature an internal temperature-compensated, low-power 0.2V reference voltage. Output Stage Structure The MAX9644/MAX9645 have open-drain outputs that allow them to interface to logic circuitry running from supply voltages other than the one supplied to the part. These devices require an external pullup resistor or current source for proper operation. Many microcontroller digital inputs ports can be readily programmed to include these. The MAX9646 has a push-pull output stage that can both sink and source current, eliminating the need for an external pullup resistor. In this case, the MAX9646 uses the microcontroller’s power supply as VCC. Applications Information Bypassing REF/VCC Place a 0.1µF capacitor between REF or V CC and GND as close as possible to the device. During a switching event, all comparators draw a current spike from their power-supply rails. This current spike is minimized by the use of an internal break-before-make design. Hysteresis Operation The ICs feature internal hysteresis for noise immunity and glitch-free operation. If additional hysteresis is needed, an external positive feedback network can be easily implemented on the MAX9644 and MAX9646 noninverting input devices. Additional external hysteresis is not possible on the MAX9645 because the noninverting input of the comparator is not externally accessible. Table 1. How Devices Behave Under Various Input Voltage Conditions PART MAX9644 MAX9645 MAX9646 INPUT VOLTAGE CONDITIONS ACTION AT OUTPUT VIN > 0.2V External pullup resistor pulls output high. VIN < 0.2V Output asserts low. VIN > 0.2V Output asserts low. VIN < 0.2V External pullup resistor pulls output high. VIN > 0.2V Output asserts high. VIN < 0.2V Output asserts low. _______________________________________________________________________________________ 7 MAX9644/MAX9645/MAX9646 Detailed Description Low-Power Comparators with Precision Reference in 4-Bump UCSP MAX9644/MAX9645/MAX9646 Typical Operating Circuits VCC = 1.0V TO 5.5V VDD VCC = 1.0V TO 5.5V VDD INTERNAL PULLUP 0.2V REF INTERNAL PULLUP MAX9644 MAX9645 0.2V REF OUT I/O IN OUT I/O IN MICROCONTROLLER MICROCONTROLLER VCC = 1.0V TO 5.5V VDD 0.2V REF MAX9646 OUT I/O IN MICROCONTROLLER Chip Information PROCESS: BiCMOS 8 _______________________________________________________________________________________ Low-Power Comparators with Precision Reference in 4-Bump UCSP PACKAGE TYPE PACKAGE CODE DOCUMENT NO. LAND PATTERN NO. 4 UCSP B4+1 21-0117 Refer to Application Note 1891 5 SOT23 U5+2 21-0057 90-0174 _______________________________________________________________________________________ 9 MAX9644/MAX9645/MAX9646 Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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 Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. SOT-23 5L .EPS MAX9644/MAX9645/MAX9646 Low-Power Comparators with Precision Reference in 4-Bump UCSP 10 ______________________________________________________________________________________ Low-Power Comparators with Precision Reference in 4-Bump UCSP REVISION NUMBER REVISION DATE 0 3/11 DESCRIPTION Initial release PAGES CHANGED — 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX9644/MAX9645/MAX9646 Revision History