19-1808; Rev 1; 1/07 +1.0V Micropower SOT23 Comparators The MAX9100/MAX9101 micropower comparators are optimized for single-cell systems, and are fully specified for operation from a single supply of 1.0V to 5.5V. This ultra-low voltage operation, 5µA quiescent current consumption, and small footprint make the MAX9100/MAX9101 ideal for use in battery-powered systems. A wide-input common-mode range that includes the negative rail and rail-to-rail output swing allows almost all of the power supply to be used for signal voltage. In addition, propagation delay is less than 4µs, and rise and fall times are 100ns. The MAX9100 features a push-pull CMOS output stage that sinks and sources current with large internal output drivers that allow rail-to-rail output swings with loads up to 5mA.The MAX9101 has an open-drain output stage that makes it suitable for mixed-voltage designs. The MAX9100/MAX9101 are available in tiny SOT23-5 packages. ____________________________Features • Ultra-Low Voltage: Guaranteed Down to 1.0V • Low Quiescent Current: 5µA • Optimized for Single-Cell Battery-Powered Systems • Wide Input Common-Mode Range • CMOS Rail-to-Rail Output Swing (MAX9100) • Open-Drain Output (MAX9101) • 4µs Propagation Delay • High Output Drive Capability: 5mA Sink and Source (MAX9100) • No Output Phase Reversal for Overdriven Inputs • Available in Tiny SOT23-5 Package Ordering Information ________________________Applications Single-Cell Systems PART Pagers PINPACKAGE TOP MARK PKG CODE ADOR U5-1 — S8-2 ADOS U5-1 — S8-2 Closed Sensor Applications MAX9100EUK-T 5 SOT23-5 Battery-Powered Instrumentation MAX9100ESA 8 SO Portable Electronic Equipment Portable Communication Devices MAX9101EUK-T 5 SOT23-5 MAX9101ESA 8 SO Note: All devices specified for over -40°C to +85°C operating temperature range. Typical Operating Characteristic Pin Configurations SUPPLY CURRENT vs. TEMPERATURE VCC = +5V 7 6 ICC (µA) MAX9100 toc01 8 TOP VIEW OUT 1 VCC = +2V 5 GND 2 VCC = +1V 5 VCC 4 IN- MAX9100 MAX9101 4 IN+ 3 3 SOT23 2 -40 -15 10 35 TEMPERATURE (°C) 60 85 Pin Configurations continued at end of data sheet. ________________________________________________________________ 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 MAX9100/MAX9101 General Description MAX9100/MAX9101 +1.0V Micropower SOT23 Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to GND) ................................. -0.3V to +6V IN+ or IN- to GND...................................... -0.3V to (VCC + 0.3V) Current Into Input Pins..................................................... ±20mA Output Voltages to GND MAX9100 .............................................. -0.3V to (VCC + 0.3V) MAX9101 ............................................................ -0.3V to +6V Output Short-Circuit Duration (to VCC or GND)......... Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin Plastic SOT23 (derate 7.3mW/°C above +70°C) ............................... 571mW 8-Pin Plastic SO (derate 5.88mW/°C above +70°C) ............................. 471mW Operating Temperature Range .......................... -40°C to +85°C Junction Temperature ..................................................... +150°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 (VCC = +1.2V to +5.5V, VCM = 0V, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Supply Voltage Range SYMBOL VCC Supply Current ICC Input Offset Voltage VOS Input Hysteresis Input Offset Current Input Bias Current IOS IB RIN Input Common-Mode Voltage Range (Note 2) VCM Common-Mode Rejection Ratio (Note 3) CMRR Power-Supply Rejection Ratio PSRR Output-Voltage Low 2 MIN 1.0 TYP MAX 5.5 VCC = +1V, TA = +25°C 5.0 8.0 VCC = +5V, TA = TMIN to TMAX 6.0 13.0 TA = +25°C ±3 ±10 ±20 TA = TMIN to TMAX ±2 VHYST Input Resistance Output-Voltage High (MAX9100) CONDITIONS Inferred from the PSRR tests VCC - VOH VOL ±0.1 VCC = +5.5V, TA = +25°C ±5 VCC = +5.5V, TA = +25°C Differential mode 200 Common mode 65 Inferred from CMRR test ±15 ±30 VCC = +5.5V, TA = TMIN to TMAX 0 54 TA = TMIN to TMAX 46 1.0V ≤ VCC ≤ 1.5V, TA = +25°C 54 66 1.5V ≤ VCC ≤ 5.5V, TA = -40°C to +85°C 56 68 68 nA nA V dB dB VCC = +5.0V, ISOURCE = 5mA 90 180 VCC = +1.2V, ISOURCE = 0.5mA 60 120 VCC = +1.0V, ISOURCE = 0.1mA, TA = +25°C 25 75 VCC = +5.0V, ISINK = 5mA 100 180 VCC = +1.2V, ISINK = 0.5mA 45 120 VCC = +1.0V, ISINK = 0.5mA, TA = +25°C 15 75 _______________________________________________________________________________________ mV MΩ VCC -0.2 TA = +25°C µA mV ±5 ±10 VCC = +5.5V, TA = TMIN to TMAX UNITS V mV mV +1.0V Micropower SOT23 Comparators (VCC = +1.2V to +5.5V, VCM = 0V, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Sourcing (MAX9100) Output Short-Circuit Current ISC Sinking Output Open-Drain Leakage Current (MAX9101) ILKG CONDITIONS VCC = +5.0V MIN TYP 25 VCC = +1.2V 3 VCC = +5.0V 28 VCC = +1.2V 3 VCC = +5.5V 0.02 MAX UNITS mA 0.2 µA Power-Up Time tPU 250 ns Input Capacitance CIN 3 pF Output Rise Time (MAX9100) trise CL = 15pF 100 ns Output Fall Time (Note 4) tfall CL = 15pF 100 ns tpd+ VOVERDRIVE = 50mV, VCC = +5.0V 3.4 tpd- VOVERDRIVE = 50mV, VCC = +5.0V 4.5 tpd+ VOVERDRIVE = 50mV, VCC = +1.0V 3.3 tpd- VOVERDRIVE = 50mV, VCC = +1.0V 3.7 Propagation Delay (Note 5) µs Note 1: All specifications are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Note 2: Operation with VCM up to VCC is possible with reduced accuracy. See the Input Stage Circuitry and Rail-to-Rail Operation section. Note 3: Tested over the specified Input Common-Mode Voltage Range and with VCC = +5.5V. Note 4: Specified with CL = 15pF for MAX9100/MAX9101, and with RPULLUP = 5kΩ for MAX9101. Note 5: Input overdrive is defined above and beyond the offset voltage and hysteresis of the comparator input. _______________________________________________________________________________________ 3 MAX9100/MAX9101 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VCC = +5V, VCM = 0V, TA = +25°C, unless otherwise noted.) OUTPUT-VOLTAGE LOW vs. SINK CURRENT 600 MAX1900 toc02 VCC = +5V 7 600 MAX9100 toc01 8 OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT 500 MAX1900 toc03 SUPPLY CURRENT vs. TEMPERATURE 500 VCC = +1V 400 5 VCC = +1V 200 3 100 VCC = +1.2V VCC = +2V VCC = +5V -15 10 35 60 85 VCC = +2V 300 VCC = +1.2V VCC = +5V 100 0 0 5 10 15 20 0 5 10 ILOAD (mA) INPUT BIAS CURRENT vs. VCM SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY 600 VOUT = VCC 35 300 ICC (µA) ICC (µA) 400 6.0 20 VCC = +2V VOUT = GND 10 IBIAS(-) = IBIAS(+) 100 25 15 5.5 200 VCC = +5V 30 6.5 500 MAX9100 toc06 7.0 40 MAX9100 toc05 7.5 MAX9100 toc04 700 5.0 5 0 VCM = VCC -100 4.5 1 2 3 4 1 5 2 3 4 0.01 5 0.1 1 10 100 VCC (V) fCLK (kHz) PROPAGATION DELAY (tpd+) vs. INPUT OVERDRIVE PROPAGATION DELAY (tpd+) vs. INPUT OVERDRIVE PROPAGATION DELAY (tpd)+ vs. INPUT OVERDRIVE 3.5 TA = +85°C 3.0 TA = +85°C 4.0 TA = +25°C 3.5 TA = -40°C 3.0 VCC = +5V 50 TA = +25°C, -40°C 150 VOD (mV) 200 4.5 4.0 TA = -40°C TA = +85°C 3.5 TA = +25°C 3.0 VCC = +2V VCC = +1V 2.5 100 MAX9100 toc09 4.5 PROPAGATION DELAY (µs) PROPAGATION DELAY (µs) 4.0 5.0 MAX9100 toc08 5.0 MAX9100 toc07 4.5 0 VCC = +1V 0 VCM (V) 5.0 2.5 20 ILOAD (mA) 800 0 15 TEMPERATURE (°C) 900 4 400 200 0 -40 IBIAS (nA) 300 4 2 VCC = +1V VCC - VOH (mV) VCC = +2V VOL (mV) ICC (µA) 6 PROPAGATION DELAY (µs) MAX9100/MAX9101 +1.0V Micropower SOT23 Comparators 250 2.5 0 20 40 60 VOD (mV) 80 100 0 20 40 60 VOD (mV) _______________________________________________________________________________________ 80 100 +1.0V Micropower SOT23 Comparators PROPAGATION DELAY vs. VCM PROPAGATION DELAY (tPD+) MAX9100 toc11 PROPAGATION DELAY (µs) MAX9100 toc10 4.5 4.0 IN+ 50mV/div OUT 500mV/div 3.5 tpd3.0 tpd+ 2.5 VOD = 50mV 2.0 0 1 2 3 4 1µs/div 5 VCM (mV) PROPAGATION DELAY (tPD-) PROPAGATION DELAY (tPD+) MAX9100 toc12 MAX9100 toc13 IN+ 50mV/div IN+ OUT 500mV/div OUT VOD = 50mV 50mV/div 2V/div VOD = 50mV 1µs/div 1µs/div POWER-UP DELAY PROPAGATION DELAY (tpd-) MAX9100 toc15 MAX9100 toc14 IN+ OUT 50mV/div VCC 2V/div 2V/div OUT 2V/div VIN- = 0V VIN+ = 100mV VOD = 50mV 1µs/div 100ns/div _______________________________________________________________________________________ 5 MAX9100/MAX9101 Typical Operating Characteristics (continued) (VCC = +5V, VCM = 0V, TA = +25°C, unless otherwise noted.) MAX9100/MAX9101 +1.0V Micropower SOT23 Comparators Typical Operating Characteristics (continued) (VCC = +5V, VCM = 0V, TA = +25°C, unless otherwise noted.) SWITCHING CURRENT, OUTPUT RISING SWITCHING CURRENT, OUTPUT FALLING RESPONSE TO SLOW TRIANGLE WAVEFORM MAX9100 toc17 MAX9100 toc16 100mV/div 5V/div IN+ MAX9100 toc18 100mV/div OUT IN+ 50mV/div 5V/div OUT 1mA/div ICC 1mA/div VOD = 50mV VOD = 50mV 2µs/div 2µs/div Pin Description PIN NAME FUNCTION SOT23-5 SO-8 1 6 OUT Comparator Output 2 4 GND Ground 3 3 IN+ Noninverting Input 4 2 IN- Inverting Input — 1, 5, 8 N.C. No Connection 5 7 VCC Positive Supply Voltage Detailed Description The MAX9100/MAX9101 are low-power and ultra-low single-supply voltage comparators. They have an operating supply voltage range between +1.0V to +5.5V and consume only 5µA of quiescent supply current, while achieving 4µs propagation delay. Input Stage Circuitry and Rail-to-Rail Operation The devices’ input common-mode range is fully specified from 0 to (VCC - 0.2V), although full rail-to-rail input range is possible with degraded performance. These comparators may operate at any differential input voltage within these limits. Input bias current is typically ±5nA if the input voltage is within the specified common-mode range. Comparator inputs are protected from overvoltage by internal diodes connected to the supply rails. As the input voltage exceeds the supply rails, these diodes become forward biased and begin 6 2V/div 5.0ms/div to conduct. Consequently, bias currents increase exponentially as the input voltage exceeds the supply rails. True rail-to-rail input operation is also possible. For input common-mode voltages from VCC - 0.2V to VCC, the input bias current will typically increase to 800nA. Additionally, the supply current will typically increase to 7µA. Otherwise, the device functions as within the specified common-mode range. See graphs in the Typical Operating Characteristics. Output Stage Circuitry The MAX9100/MAX9101 contain a unique output stage capable of rail-to-rail operation. Many comparators consume orders of magnitude more current during switching than during steady-state operation. However, with this family of comparators, the supply-current change during an output transition is extremely small. The Typical Operating Characteristics graph Supply Current vs. Output Transition Frequency shows the minimal supply-current increase as the output switching frequency approaches 100kHz. This characteristic reduces the requirement for power-supply filter capacitors to reduce glitches created by comparator switching currents. This feature increases battery life in portable applications. Push-Pull Output (MAX9100) The MAX9100 has a push-pull CMOS output. The output stage swings rail-to-rail under no-load conditions. External load drive capability varies with supply voltage. _______________________________________________________________________________________ +1.0V Micropower SOT23 Comparators VTH is the threshold voltage at which the comparator switches its output from high to low as V IN rises above the trip point. VTL is the threshold voltage at which the comparator switches its output from low to high as VIN drops below the trip point. 2) The hysteresis band will be: ⎛ ⎞ ⎟ ⎝ R1 + R2 ⎠ Applications Information Low-Voltage Operation: VCC = 1V The minimum operating voltage is +1.0V. At lower supply voltages, the input common-mode range remains rail-to-rail, but the comparator’s output drive capability is reduced and propagation delay increases (see the Typical Operating Characteristics). Internal Hysteresis Hysteresis increases the comparators’ noise margin by increasing the upper threshold and decreasing the lower threshold (Figure 1). This hysteresis prevents the comparator from providing multiple poles when driven with a very-slow-changing signal. Additional Hysteresis These comparators have 1.0mV internal hysteresis. Additional hysteresis can be generated with two resistors using positive feedback (Figure 2). Use the following procedure to calculate resistor values: 1) Calculate the trip points of the comparator using these formulas: ( ) ⎞ ⎛ V CC − VREF R2 ⎟ ⎜ VTH = VREF + ⎟⎟ ⎜⎜ R1 + R2 ⎠ ⎝ and ⎛ R2 ⎞ VTL = VREF ⎜1 − ⎟ ⎝ R1 + R2 ⎠ 3) In this example, let VCC = +5V and VREF = +2.5V: ⎛ R2 ⎞ VTH = 2.5 + 2.5 ⎜ ⎟ ⎝ R1 + R2 ⎠ and ⎛ R2 ⎞ VTL = 2.5 ⎜1 − ⎟ R1 + R2 ⎠ ⎝ 4) Select R2. In this example, we will choose 1kΩ. 5) Select VHYS. In this example, we will choose 50mV. 6) Solve for R1: ⎛ R2 ⎞ VHYS = VCC ⎜ ⎟ ⎝ R1 + R2 ⎠ ⎛ 1000 ⎞ 0.050 = 5 ⎜ ⎟ ⎝ R1 +1000 ⎠ where R1 ≈ 100kΩ, VTH = 2.525V, and VTL = 2.475V. Board Layout and Bypassing A power-supply bypass capacitor is not normally required, but 100nF bypass capacitors can be used when the supply impedance is high or when the supply VCC THRESHOLDS IN+ R2 VHYS = VTH - VTL = VCC ⎜ R2 VIN - +VHYST/2 INVIN - VHYST R2 HYSTERESIS VHYST BAND VREF VCC OUT GND MAX9100 VIN OUT Figure 1. Threshold Hysteresis Band Figure 2. Additional Hysteresis (MAX9100) _______________________________________________________________________________________ 7 MAX9100/MAX9101 Open-Drain Output (MAX9101) The MAX9101 has an open-drain output, which can be pulled up to +6.0V above ground independent of the supply voltage. This is typically used with an external pullup resistor, facilitating interface between mixed logic voltages. Alternatively, multiple open-drain comparator outputs can be connected in a wired-OR configuration. MAX9100/MAX9101 +1.0V Micropower SOT23 Comparators +5V +1.0V +3V 232kΩ 100kΩ VCC VCC IN- RPULLUP INOUT 100kΩ 5V LOGIC OUT IN+ 3V LOGIC OUT OUT 100kΩ IN+ MAX9100 MAX9101 GND 3V LOGIC IN GND 1V LOGIC IN Figure 3. MAX9100 Logic-Level Translator leads are long. Minimize signal lead lengths to reduce stray capacitance between the input and output that might cause instability. Figure 4. MAX9101 Logic-Level Translator Pin Configurations (continued) Typical Application N.C. 1 IN- 8 N.C. 2 7 VCC IN+ 3 6 OUT GND 4 5 N.C. MAX9100 MAX9101 Logic-Level Translator 3V to 5V Figure 3 shows an application that converts 3V logic levels to 5V logic levels. The push-pull output MAX9100 is powered by the +5V supply voltage, and the inverting input is biased to +1.5V with two resistors. This configuration allows a full 5V swing at the output, maximizing the noise margin of the receiving circuit. 1V to 3V Figure 4 shows an application that converts 1V logic levels to 3V logic levels. The MAX9101 is powered by the +1V supply voltage, and the pullup resistor for the output is connected to the +3V supply voltage. The inverting input is biased to +0.5V with two resistors. SO-8 Chip Information TRANSISTOR COUNT: 393 PROCESS: BiCMOS Revision History Pages changed at Rev 1: 1–8 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.