MAX9075C/D-W

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators General Description Features The MAX9075/MAX9077 single/dual comparators are optimized for 3V and 5V single-supply applications. These comparators have a 580ns propagation delay and consume just 3µA per comparator. The combination of low-power, single-supply operation down to 2.1V, and ultra-small footprint makes these devices ideal for all portable applications. o 580ns Propagation Delay from Only 3µA The MAX9075/MAX9077 have a common-mode input voltage range of -0.2V to VCC - 1.2V. Unlike many comparators, there is no differential clamp between the inputs, allowing the differential input voltage range to extend rail-to-rail. All inputs and outputs tolerate a continuous short-circuit fault condition to either rail. o No Differential Clamp Across Inputs The design of the output stage limits supply-current surges while switching (typical of many other comparators), minimizing power consumption under dynamic conditions. Large internal push-pull output drivers allow rail-to-rail output swing with loads up to 2mA, making these devices ideal for interface with TTL/CMOS logic. The MAX9075 single comparator is available in 5-pin SC70 and SOT23 packages, while the MAX9077 dual comparator is available in 8-pin SOT23, µMAX®, and SO packages. o 2.1V to 5.5V Single-Supply Operation o Ground-Sensing Inputs o Rail-to-Rail Outputs o No Output Phase Inversion for Overdriven Inputs o Available in Ultra-Small Packages 5-Pin SC70 (MAX9075) 8-Pin SOT23 (MAX9077) Ordering Information TEMP RANGE PINPACKAGE MAX9075EXK+T -40°C to +85°C 5 SC70 AAC+ MAX9075EUK+T -40°C to +85°C 5 SOT23 ADLX+ MAX9077EKA+T -40°C to +85°C 8 SOT23 AAAD+ MAX9077EUA+ -40°C to +85°C 8 µMAX — MAX9077ESA+ -40°C to +85°C 8 SO — -55°C to +125°C 8 SO — PART* MAX9077MSA/PR2 Applications Battery-Powered Systems TOP MARK +Denotes a lead(Pb)-free/RoHS-compliant package. *Denotes a package containing lead(Pb). T = Tape and reel. Threshold Detectors/Discriminators Keyless Entry Systems Typical Operating Circuit IR Receivers Digital Line Receivers VCC Pin Configurations VIN TOP VIEW VCC + OUT 1 5 MAX9075 MAX9077 VCC IN+ MAX9075 OUT GND 2 ININ+ 3 4 INVREF SC70-5/SOT23-5 GND Pin Configurations continued at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-1547; Rev 4; 12/12 MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC to GND........................................................................6V All Other Pins to GND...........................-0.3V to (VCC + 0.3V) Current into Input Pins ......................................................±20mA Duration of Output Short-Circuit to GND or VCC ........Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 3.1mW/°C above +70°C) ............247mW 5-Pin SOT23 (derate 3.1mW/°C above +70°C)..........247mW 8-Pin SOT23 (derate 5.2mW/°C above +70°C)..........412mW 8-Pin µMAX (derate 4.5mW/°C above +70°C) ...........362mW 8-Pin SO (derate 5.88mW/°C above +70°C)..............471mW Operating Temperature Range ...........................-40°C to +85°C Military Operating Temperature Range .............-55°C to +125°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) Lead (Pb)-free............................................................+260°C Containing lead (Pb) ..................................................+240°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 = 5V, VCM = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Operating Supply Voltage Range VCC Supply Current per Comparator ICC CONDITIONS VCC = 5V MIN TYP 2.1 Inferred from PSRR 3 TA = +25°C PSRR 2.1V ≤ VCC ≤ 5.5V 54 Common-Mode Voltage Range VCMR (Note 2) 0 VOS ±1 Input Offset Current IOS 1 IB Common-Mode Rejection Ratio CMRR VCM = 0.2V (Note 3) 0V ≤ VCM ≤ (VCC - 1.2V) 5.2 77 Input Offset Voltage CIN V µA 2.4 Power-Supply Rejection Ratio Input Capacitance UNITS 5.5 7.5 TA = TMIN to TMAX VCC = 3V Input Bias Current MAX -5 60 dB VCC 1.2 V ±8 mV nA -20 nA 3 pF 82 dB VCC 0.4 OUT_ Output-Voltage High VOH ISOURCE = 2mA OUT_ Output-Voltage Low VOL ISINK = 2mA Propagation Delay Low to High tPD+ CLOAD = 10pF, overdrive = 100mV 580 ns Propagation Delay High to Low tPD- CLOAD = 10pF, overdrive = 100mV 250 ns CLOAD = 10pF 1.6 ns Rise/Fall Time V 0.4 V Note 1: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Note 2: Inferred from CMRR. Either input can be driven to the absolute maximum limit without output inversion, as long as the other input is within the input voltage range. Note 3: Guaranteed by design. 2 Maxim Integrated MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (VCC = 5V, VCM = 0V, 100mV overdrive, TA = +25°C, unless otherwise noted.) OUTPUT-VOLTAGE LOW vs. SINK CURRENT (VCC = 2.1V) TA = +85°C 1.5 TA = +85°C 10 15 5 10 15 20 25 30 35 SINK CURRENT (mA) SINK CURRENT (mA) OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT (VCC = 2.1V) OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT (VCC = 3V) 3.0 1.5 TA = +85°C 1.0 TA = +25°C 0.5 TA = -40°C 2.5 TA = +85°C TA = +25°C 1.0 6 8 10 12 14 SOURCE CURRENT (mA) 16 SHORT-CIRCUIT SINK CURRENT vs. TEMPERATURE 80 VCC = 5V 60 50 40 VCC = 3V 30 20 5 10 15 20 25 30 35 SOURCE CURRENT (mA) 40 100 90 VCC = 2.1V VCC = 5V 80 SOURCE CURRENT (mA) SINK CURRENT (mA) 70 0 60 50 40 VCC = 3V 30 5 25 45 TEMPERATURE (°C) Maxim Integrated 65 1 0 85 10 20 30 40 50 60 70 80 90 100 SOURCE CURRENT (mA) 4.5 4.0 3.5 VCC = 5V 3.0 VCC = 3V 2.5 2.0 VCC = 2.1V 1.5 1.0 VCC = 2.1V 0.5 0 0 -15 TA = +25°C SUPPLY CURRENT vs. TEMPERATURE (OUT = HIGH) 10 -35 2 45 70 20 10 -55 TA = +85°C 3 SHORT-CIRCUIT SOURCE CURRENT vs. TEMPERATURE MAX9075 toc07 90 4 -1 0 18 SUPPLY CURRENT (μA) 4 90 0 MAX9075 toc08 2 80 TA = -40°C -0.5 0 30 40 50 60 70 SINK CURRENT (mA) 5 0 -0.5 20 6 0.5 0 10 OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT (VCC = 5V) 2.0 1.5 0 40 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) TA = -40°C MAX9075/7 toc03 TA = -40°C MAX9075/7 toc05 2.0 3.5 MAX9075/7 toc04 2.5 TA = +85°C 2 0 0 20 TA = +25°C 3 MAX9075 toc09 5 4 1 0 0 5 TA = -40°C 0.5 0 OUTPUT VOLTAGE (V) TA = +25°C 1.0 TA = -40°C 0.5 2.5 2.0 6 MAX9075/7 toc06 TA = +25°C 1.5 3.0 OUTPUT VOLTAGE (V) 2.0 7 MAX9075/7 toc02 3.5 OUTPUT VOLTAGE (V) 2.5 OUTPUT VOLTAGE (V) 4.0 MAX9075/7 toc01 3.0 1.0 OUTPUT-VOLTAGE LOW vs. SINK CURRENT (VCC = 5V) OUTPUT-VOLTAGE LOW vs. SINK CURRENT (VCC = 3V) -55 -35 -15 5 25 45 TEMPERATURE (°C) 65 85 -55 -35 -15 5 25 45 65 85 TEMPERATURE (°C) 3 MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (continued) (VCC = 5V, VCM = 0V, 100mV overdrive, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY SUPPLY CURRENT (μA) VCC = 5V 2.5 VCC = 3V 2.0 VCC = 2.1V 1.5 100 -0.1 OFFSET VOLTAGE (mV) 3.0 0 MAX9075 toc11 3.5 SUPPLY CURRENT (μA) 1000 MAX9075 toc10 4.0 INPUT OFFSET VOLTAGE vs. TEMPERATURE VCC = 5V VCC = 3V 10 1.0 MAX9075 toc12 SUPPLY CURRENT vs. TEMPERATURE (OUT = LOW) -0.2 -0.3 -0.4 VCC = 5V -0.5 VCC = 3V -0.6 VCC = 2.1V 0.5 VCC = 2.1V 0 1 -15 5 25 45 65 10 100 1k 10k 100k 1M 25 45 65 PROPAGATION DELAY vs. INPUT OVERDRIVE (tPD+) PROPAGATION DELAY vs. INPUT OVERDRIVE (tPD-) 0.1 0.7 1.0 0.8 VCC = 5V VCC = 3V 0.6 0.4 0.6 PROPAGATION DELAY vs. TEMPERATURE (VCC = 2.1V) tPD- 300 250 200 150 100 150 200 25 45 TEMPERATURE (°C) 65 85 150 200 PROPAGATION DELAY vs. TEMPERATURE (VCC = 5V) 500 tPD+ 400 300 tPD- 200 800 700 tPD+ 600 250 500 400 300 tPD- 200 100 0 0 5 100 PROPAGATION DELAY vs. TEMPERATURE (VCC = 3V) 100 -15 50 INPUT OVERDRIVE (mV) 50 0 0 250 INPUT OVERDRIVE (mV) 600 PROPAGATION DELAY (ns) 350 100 PROPAGATION DELAY (ns) tPD+ 400 50 MAX9075 toc17 450 MAX9075 toc16 500 0.2 0 0 2000 VCC = 2.1V VCC = 3V VCC = 5V 0.3 0.1 0 500 1000 1500 LOAD CAPACITANCE (pF) 0.4 VCC = 2.1V 0.2 0 0.5 MAX9075 toc18 0.2 1.2 85 MAX9075 toc15 1.4 PROPAGATION DELAY (μs) tPD- 0.3 1.6 MAX9075 toc13 0.4 -35 5 PROPAGATION DELAY vs. LOAD CAPACITANCE 0.5 -55 -15 TEMPERATURE (°C) 0.6 0 -35 TRANSITION FREQUENCY (Hz) tPD+ 4 -55 TEMPERATURE (°C) 0.7 PROPAGATION DELAY (μs) -0.8 1 85 PROPAGATION DELAY (μs) -35 MAX9075 toc14 -55 PROPAGATION DELAY (ns) -0.7 -55 -35 -15 5 25 45 TEMPERATURE (°C) 65 85 -55 -35 -15 5 25 45 65 85 TEMPERATURE (°C) Maxim Integrated MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (continued) (VCC = 5V, VCM = 0V, 100mV overdrive, TA = +25°C, unless otherwise noted.) PROPAGATION DELAY (tPD-) PROPAGATION DELAY (tPD+) MAX9075/7 toc20 MAX9075/7 toc19 VCC = 5V VCC = 5V VIN VIN 50mV/div 50mV/div VOUT 2V/div 2V/div VOUT 100ns//div 100ns/div PROPAGATION DELAY (tPD-) PROPAGATION DELAY (tPD+) MAX9075/7 toc21 MAX9075/7 toc22 VCC = 3V VCC = 3V VIN 50mV/div VIN 50mV/div VOUT 1V/div VOUT 1V/div 100ns/div 100ns/div TRIANGLE WAVE INPUT BIAS CURRENT vs. TEMPERATURE MAX9075/7 toc23 MAX9075 toc24 7 VCC = 3V 50mV/div VIN VOUT 1V/div INPUT BIAS CURRENT (nA) 6 VCC = 5V 5 VCC = 3V 4 VCC = 2.1V 3 2 1 0 200μs/div -55 -35 -15 5 25 45 65 85 TEMPERATURE (°C) Maxim Integrated 5 MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Pin Description PIN MAX9075 NAME MAX9077 FUNCTION SOT23 SC70 µMAX/SO SOT23 1 1 — — OUT — — 1 1 OUTA Output of Comparator A 2 2 4 2 GND Ground 3 3 — — IN+ Noninverting Comparator Input — — 3 4 INA+ 4 4 — — IN- — — 2 3 INA- Inverting Input of Comparator A 5 5 8 8 VCC Positive Supply Voltage — — 5 5 INB+ Noninverting Input of Comparator B — — 6 6 INB- Inverting Input of Comparator B — — 7 7 OUTB Detailed Description The MAX9075/MAX9077 feature a 580ns propagation delay from an ultra-low supply current of only 3µA per comparator. These devices are capable of single-supply operation in the 2.1V to 5.5V range. Large internal output drivers allow rail-to-rail output swing with up to 2mA loads. Both comparators offer a push-pull output that sinks and sources current. Comparator Output The MAX9075/MAX9077 are designed to maintain a low-supply current during repeated transitions by limiting the shoot-through current. Noise Considerations, Comparator Input The input common-mode voltage range for these devices extends from 0V to VCC - 1.2V. Unlike many other comparators, the MAX9075/MAX9077 can operate at any differential input voltage within these limits. Input bias current is typically -5nA if the input voltage is between the supply rails. Although the comparators have a very high gain, useful gain is limited by noise. The comparator has a wideband peak-to-peak noise of approximately 70µV. Comparator Output Noninverting Input of Comparator A Inverting Comparator Input Output of Comparator B Applications Information Adding Hysteresis Hysteresis extends the comparator’s noise margin by increasing the upper threshold and decreasing the lower threshold. A voltage divider from the output of the comparator sets the trip voltage. Therefore, the trip voltage is related to the output voltage. Set the hysteresis with three resistors using positive feedback, as shown in Figure 1. The design procedure is as follows: 1) Choose R3. The leakage current of IN+ may cause a small error; however, the current through R3 can be approximately 500nA and still maintain accuracy. The added supply current due to the circuit at the trip point is VCC/R3; 10MΩ is a good practical value for R3, as this keeps the current well below the supply current of the chip. 2) Choose the hysteresis voltage (VHYS), which is the voltage between the upper and lower thresholds. In this example, choose VHYS = 50mV and assume VREF = 1.2V and VCC = 5V. 3) Calculate R1 as follows: R1 = R3 x VHYS/VCC = 10MΩ x 0.05/5 = 100kΩ 6 Maxim Integrated MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators 4) Choose the threshold voltage for VIN rising (VTHR). In this example, choose VTHR = 3V. VCC 5) Calculate R2 as follows: R3 R2 = 1/{[VTHR/(VREF  R1)] - 1/R1 - 1/R3} = 1/{[3 / (1.2  100kΩ)] - 1/100kΩ - 1/10MΩ} = 67.114kΩ R1 VIN VCC A 1% preferred value is 64.9kΩ. 6) Verify the threshold voltages with these formulas: VIN rising: OUT R2 GND MAX9075 MAX9077 VREF VTHR = VREF  R1 (1/R1 + 1/R2 + 1/R3) VIN falling: VTHF = VTHR - (R1  VCC)/R3 7) Check the error due to input bias current (5nA). If the error is too large, reduce R3 and recalculate. Figure 1. Adding Hysteresis Pin Configurations (continued) VTH = IB (R1  R2  R3)/(R1 + R2 + R3) = 0.2mV Board Layout and Bypassing Use 10nF power-supply bypass capacitors. Use 100nF bypass capacitors when supply impedance is high, when supply leads are long, or when excessive noise is expected on the supply lines. Minimize signal trace lengths to reduce stray capacitance. Minimize the capacitive coupling between IN- and OUT. For slowmoving input signals (rise time > 1ms) use a 1nF capacitor between IN+ and IN-. TOP VIEW + OUTA 1 GND 2 INA- 8 VCC 7 OUTB 3 6 INB- INA+ 4 5 INB+ 8 VCC 7 OUTB MAX9077 Chip Information SOT23-8 PROCESS: BiCMOS + OUTA 1 INA- 2 INA+ 3 6 INB- GND 4 5 INB+ MAX9077 µMAX/SO Maxim Integrated 7 MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.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. 8 PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 5 SC70 X5+1 21-0076 90-0188 5 SOT23 U5+1 21-0057 90-0174 8 SOT23 K8+2 21-0078 90-0176 8 µMAX U8+1 21-0036 90-0092 8 S0 S8+4 21-0041 90-0096 Maxim Integrated MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Revision History REVISION NUMBER REVISION DATE 0 0/99 Initial release — 3 1/07 Revised Absolute Maximum Ratings 2 12/12 Added MAX9077MSA/PR2 to Ordering Information and updated for lead-free notation. Revised Absolute Maximum Ratings, Electrical Characteristics, and the Noise Considerations, Comparator Input section. 4 DESCRIPTION PAGES CHANGED 1, 2, 6 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 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 _________________________________ 9 © 2012 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.