19-1936; Rev 1; 1/05 Low-Cost, 7ns, Low-Power Voltage Comparators The MAX9201/MAX9202/MAX9203 high-speed, lowpower, quad/dual/single comparators feature TTL logic outputs with active internal pullups. Fast propagation delay (7ns typ at 5mV overdrive) makes these devices ideal for fast A/D converters and sampling circuits, line receivers, V/F converters, and many other data-discrimination, signal restoration applications. All comparators can be powered from separate analog and digital power supplies or from a single combined supply voltage. The analog input common-mode range includes the negative rail, allowing ground sensing when powered from a single supply. The MAX9201/ MAX9202/MAX9203 consume only 9mW per comparator when powered from a +5V supply. The MAX9202/MAX9203 feature output latches with TTL compatible inputs. The comparator output states are held when the latch inputs are driven low. The MAX9201 provides all the same features as the MAX9202/MAX9203 with the exception of the latches. The MAX9201/MAX9202/MAX9203 are lower power and lower cost upgrades to the MAX901/MAX902/MAX903 offering a 50% power savings and smaller packaging. ____________________________Features ♦ Fast 7ns Propagation Delay ♦ Low 9mW/Comparator Power Consumption ♦ Separate Analog and Digital Supplies ♦ Flexible Analog Supply: +5V to +10V or ±5V ♦ Input Voltage Range Includes Negative Supply Rail ♦ TTL-Compatible Outputs ♦ TTL-Compatible Latch Inputs (MAX9202/MAX9203) ♦ Available in Space-Saving Packages 8-Pin SOT23 (MAX9203) 14-Pin TSSOP (MAX9202) 16-Pin TSSOP (MAX9201) Ordering Information PART ________________________Applications High-Speed A/D Converters High-Speed V/F Converters Line Receivers High-Speed Signal Squaring/Restoration Threshold Detectors Input Trigger Circuitry High-Speed Data Sampling PWM Circuits TEMP RANGE PIN-PACKAGE MAX9201EUE -40°C to +85°C 16 TSSOP MAX9201ESE -40°C to +85°C 16 Narrow SO MAX9202EUD -40°C to +85°C 14 TSSOP MAX9202ESD -40°C to +85°C 14 Narrow SO MAX9203EKA-T -40°C to +85°C 8 SOT23-8 MAX9203ESA -40°C to +85°C 8 Narrow SO Pin Configurations TOP VIEW INA- 1 16 IND- INA- 1 14 VCC INA+ 2 15 IND+ INA+ 2 13 N.C. GND 3 14 VCC GND 3 12 OUTB OUTA 4 MAX9201 OUTB 5 13 OUTD LATCHA 4 12 OUTC OUTA 5 MAX9202 11 LATCHB 10 VDD VEE 6 11 VDD N.C. 6 9 INB+ INB+ 7 10 INC+ VEE 7 8 INB- INB- 8 9 VCC 1 8 VDD VDD 1 7 OUT OUT 2 3 6 GND GND VEE 4 5 LATCH IN+ 2 8 VCC 7 IN+ 3 6 IN- LATCH 4 5 VEE MAX9203 IN- SO MAX9203 SOT23 INC- SO/TSSOP SO/TSSOP ________________________________________________________________ Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX9201/MAX9202/MAX9203 General Description MAX9201/MAX9202/MAX9203 Low Cost, 7ns, Low-Power Voltage Comparators ABSOLUTE MAXIMUM RATINGS Analog Supply Voltage (VCC - VEE) .....................................+12V Digital Supply Voltage (VDD) .................................................+7V Differential Input Voltage..................(VEE - 0.3V) to (VCC + 0.3V) Common Mode Input Voltage ..........(VEE - 0.3V) to (VCC + 0.3V) Latch Input Voltage (MAX9202/MAX9203 only) .....................-0.3V to (VDD + 0.3V) Output Short-Circuit Duration To GND ......................................................................Continuous To VDD ..................................................................................1min Continuous Power Dissipation (TA = +70°C) 8-Pin SOT23-8 (derate 9.1mW/°C above +70°C) ...727mW/°C 8-Pin SO (derate 5.9mW/°C above +70°C).............471mW/°C 14-Pin TSSOP (derate 9.1mW/°C above +70°C) ....727mW/°C 14-Pin SO (derate 8.3mW/°C above +70°C)...........667mW/°C 16-Pin TSSOP (derate 9.4mW/°C above +70°C) ....755mW/°C 16-Pin SO (derate 8.7mW/°C above +70°C)...........696mW/°C Operating Temperature Range ...........................-45°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 = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Analog Supply Voltage Range Digital Supply Voltage Range Input Offset Voltage Input Bias Current CONDITIONS VDD Referenced to GND VOS VCM = 0, VOUT= 1.4V IB IIN+ or IIN- Input Offset Current IOS VCM = 0, VOUT = 1.4V Common-Mode Input Voltage Range VCM Note 2 Common-Mode Rejection Ratio CMRR -5.1V < VCM < +2.75V VOUT = 1.4V Power-Supply Rejection Ratio PSRR Note 3 MIN TYP 4.75 4.75 TA = +25°C 1 TA = -40°C to +85°C MAX UNITS 10.5 V 5.25 V 4 7.5 TA = +25°C 1.25 TA = -40°C to +85°C 5 7.0 TA = +25°C 50 TA = -40°C to +85°C 250 450 VCC 2.25 VEE - 0.1 TA = +25°C 50 TA = -40°C to +85°C 150 250 TA = +25°C 50 TA = -40°C to +85°C 150 250 nA V µV/V µV/V (VIN+ - VIN-) > 250mV, ISOURCE = 1mA Output Low Voltage VOL (VIN+ - VIN-) < -250mV, ISINK = 8mA 0.25 0.4 V Latch Input Threshold Voltage High VLH Note 4 1.4 2 V VLL Note 4 ILH VLH = 3.0V, Note 4 0.5 3 µA Latch Input Current Low ILL VLL = 0.3V, Note 4 0.5 3 µA Input Capacitance CIN 4 pF Differential Input Impedance RIND 5 MΩ RINCM 5.5 MΩ Positive Analog Supply Current ICC Note 5 0.8 3.5 µA VOH Common-Mode Input Impedance 3.0 mV Output High Voltage Latch Input Threshold Voltage Low Latch Input Current High 2 SYMBOL VCC - VEE Referenced to VEE V 1.4 V MAX9201 4.7 7 MAX9202 2.5 4.0 MAX9203 1.3 2 _______________________________________________________________________________________ mA Low Cost, 7ns, Low-Power Voltage Comparators (VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Negative Analog Supply Current Digital Supply Current Power Dissipation SYMBOL IEE IDD PD CONDITIONS Note 5 Note 5 VCC = VDD = +5V, VEE = 0V TYP MAX MAX9201 MIN 3.4 5.0 MAX9202 1.8 3.0 MAX9203 1.0 1.6 MAX9201 2 3.0 MAX9202 1 1.5 MAX9203 0.5 0.8 MAX9201 33 44 MAX9202 17 24 MAX9203 9 13 UNITS mA mA mW TIMING CHARACTERISTICS (VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, T A = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Notes 1, 6) PARAMETER SYMBOL CONDITIONS VOD = 5mV, CL = 15pF, IOUT = 2mA TA = +25°C MIN TYP MAX 7 9 UNITS Input-to-Output High Response Time tPD+ Input-to-Output Low Response Time tPD- Rise Time tR CL = 15pF, IOUT = 2mA TA = +25°C 2.0 ns Fall Time tF CL = 15pF, IOUT = 2mA TA = +25°C 1.0 ns TA = +25°C 0.5 VOD = 5mV, CL = 15pF, IOUT = 2mA ns TA = -40°C to +85°C TA = +25°C 12 7 9 ns TA = -40°C to +85°C 12 1.5 Difference in Response Time Between Outputs ∆tPD Note 7 Latch Disable to Output High Delay tPD+(D) Note 4 10 ns Latch Disable to Output Low Delay tPD-(D) Note 4 10 ns Minimum Setup Time tS Note 4 2 ns Minimum Hold Time tN Note 4 1 ns tPW(D) Note 4 8 ns Minimum Latch Disable Pulse Width TA = -40°C to +85°C 2.5 ns Note 1: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Note 2: Inferred by CMRR test. Note 3: Tested for +4.75V < VCC < +5.25V, and -5.25V < VEE < -4.75V with VDD = +5V, although permissible analog power-supply range is 4.75V < VCC < +10.5V for single supply operation with VEE grounded. Note 4: Specification does not apply to MAX9201. Note 5: ICC tested for 4.75V < VCC < +10.5V with VEE grounded. IEE tested for -5.25V < VEE < -4.75V with VCC = +5V. IDD tested for +4.75V < VDD < +5.25V with all comparator outputs low, worst-case condition. Note 6: Guaranteed by design. Times are for 100mV step inputs (see propagation delay characteristics in Figures 2 and 3) Note 7: Maximum difference in propagation delay between two comparators in the MAX9201/MAX9202. _______________________________________________________________________________________ 3 MAX9201/MAX9202/MAX9203 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, VOUT = 1.4V, TA = +25°C, unless otherwise noted.) INPUT BIAS CURRENT vs. TEMPERATURE INPUT OFFSET VOLTAGE vs. TEMPERATURE VCM = 0 1.6 INPUT BIAS CURRENT (µA) 1.0 0.5 0 -0.5 -1.0 1.2 1.0 0.8 0.4 -15 10 35 60 -15 10 35 60 TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT HIGH VOLTAGE (VOH) vs. LOAD CURRENT OUTPUT LOW VOLTAGE (VOL) vs. LOAD CURRENT TA = +85°C 3.6 TA = +25°C 3.2 3.0 350 TA = -40°C MAX9201 toc04 3.8 85 400 OUTPUT LOW VOLTAGE (mV) 4.0 3.4 -40 85 MAX9201 toc03 -40 OUTPUT HIGH VOLTAGE (V) 1.4 0.6 -1.5 TA = -40°C 300 250 200 TA = +25°C 150 100 TA = +85°C 50 0 2.8 0 2 4 6 8 10 0 12 2 ICC SUPPLY CURRENT (PER COMPARATOR) vs. VCC SUPPLY VOLTAGE 10 12 RESPONSE TIME vs. INPUT OVERDRIVE 9.5 9.0 RESPONSE TIME (ns) TA = +85°C 1.3 1.2 TA = +25°C 1.0 8.5 8.0 tPD- 7.5 7.0 6.5 6.0 TA = -40°C 0.9 8 MAX9201 toc06 1.5 1.1 6 10.0 MAX9201 toc05 1.6 1.4 4 LOAD CURRENT (mA) LOAD CURRENT (mA) tPD+ 5.5 VEE = GND 5.0 0.8 5 6 7 8 VCC SUPPLY VOLTAGE (V) 4 MAX9201 toc02 1.8 MAX9201 toc01 INPUT OFFSET VOLTAGE (mV) 1.5 ICC SUPPLY CURRENT (mA) MAX9201/MAX9202/MAX9203 Low Cost, 7ns, Low-Power Voltage Comparators 9 10 0 5 10 15 20 25 30 35 40 45 50 INPUT OVERDRIVE (mV) _______________________________________________________________________________________ Low Cost, 7ns, Low-Power Voltage Comparators (VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, VOUT = 1.4V, TA = +25°C, unless otherwise noted.) RESPONSE TIME vs. TEMPERATURE (5mV OVERDRIVE) 7.5 7.3 tPD+ 7.0 MAX9201 toc08 9.5 tPDRESPONSE TIME (ns) 7.8 RESPONSE TIME (ns) 10.0 MAX9201 toc07 8.0 RESPONSE TIME vs. LOAD CAPACITANCE (5mV OVERDRIVE, RLOAD = 2.4kΩ) 9.0 8.5 8.0 tPD+ 7.5 7.0 6.8 tPD- 6.5 6.5 6.0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 0 TEMPERATURE (°C) 10 20 30 40 50 60 70 80 90 LOAD CAPACITANCE (pF) Pin Description MAX9201 MAX9202 PIN NAME FUNCTION PIN NAME 1, 8, 9, 16 IN_- Negative Input (Channels A, B, C, D) 1, 8 IN_- Negative Input (Channels A, B) 2, 7, 10, 15 Positive Input (Channels A, B, C, D) 2, 9 IN_+ Positive Input (Channels A, B) IN_+ 3 GND Ground 3 GND Ground 4, 11 LATCH_ Latch Input (Channels A, B) 4, 5, 12, 13 OUT_ Output (Channels A, B, C, D) 5, 12 OUT_ Output (Channels A, B) 6, 13 N.C. No Connection VEE Negative Analog Supply and Substrate 7 VEE Negative Analog Supply and Substrate 10 VDD Positive Digital Supply 14 VCC Positive Analog Supply 6 11 VDD Positive Digital Supply 14 VCC Positive Analog Supply FUNCTION _______________________________________________________________________________________ 5 MAX9201/MAX9202/MAX9203 Typical Operating Characteristics (continued) MAX9201/9202/9203 Low Cost, 7ns, Low-Power Voltage Comparators decoupling and terminating components. Short lead lengths on the inputs and outputs are essential to avoid unwanted parasitic feedback around the comparators. Solder the device directly to the printed circuit board instead of using a socket. Pin Description (continued) MAX9203 PIN NAME FUNCTION SO SOT 1 8 VCC Positive Analog Supply 2 7 IN+ Positive Input 3 6 IN- Negative Input 4 5 VEE Negative Analog Supply and Substrate 5 4 LATCH 6 3 GND Ground 7 2 OUT Output 8 1 VDD Positive Digital Supply Input Slew-Rate Requirements As with all high-speed comparators, the high gain-bandwidth product of the MAX9201/MAX9202/ MAX9203 can create oscillation problems when the input traverses the linear region. For clean output switching without oscillation or steps in the output waveform, the input must meet minimum slew-rate requirements (0.5V/s typ). Oscillation is largely a function of board layout and of coupled source impedance and stray input capacitance. Both poor layout and large source impedance will cause the part to oscillate and increase the minimum slew-rate requirement. In some applications, it may be helpful to apply some positive feedback between the output and positive input. This pushes the output through the transition region clearly, but applies a hysteresis in threshold seen at the input terminals. Latch Input Applications Information Circuit Layout TTL Output and Latch Inputs Because of the large gain-bandwidth transfer function of the MAX9201/MAX9202/MAX9203 special precautions must be taken to realize their full high-speed capability. A printed circuit board with a good, lowinductance ground plane is mandatory. All decoupling capacitors (the small 100nF ceramic type is a good choice) should be mounted as close as possible to the power-supply pins. Separate decoupling capacitors for analog VCC and for digital VDD are also recommended. Close attention should be paid to the bandwidth of the The comparator TTL output stages are optimized for driving low-power Schottky TTL with a fan-out of four. When the latch is connected to a logic high level, the comparator is transparent and immediately responds to changes at the input terminals. When the latch is connected to a TTL low level, the comparator output latches (in the same state) the instant that the latch command is applied, and will not respond to subsequent changes at the input. No latch is provided on the MAX9201. Typical Power-Supply Alternatives +5V +5V +10V +5V +5V VCC VCC VCC VDD VDD OUT GND GND VEE VDD OUT OUT VEE GND VEE -5V Figure 1a. Separate Analog Supply, Common Ground 6 Figure 1b. Single +5V Supply, Common Ground Figure 1c. Split ±5V Supply, Separate Ground _______________________________________________________________________________________ Low Cost, 7ns, Low-Power Voltage Comparators Definition of Terms Input Offset Voltage: Voltage applied between the two input terminals to obtain TTL logic threshold (+1.4V) at the output. Input Voltage Pulse Amplitude: Usually set to 100mV for comparator specifications. Input Voltage Overdrive: Usually set to 5mV and in opposite polarity to VIN for comparator specifications. Input to Output High Delay: The propagation delay measured from the time the input signal crosses the input offset voltage to the TTL logic threshold (+1.4V) of an output low to high transition. VOS VIN VOD tpd+ LATCH ENABLE INPUT COMPARE Input to Output Low Delay: The propagation delay measured from the time the input signal crosses the input offset voltage to the TTL logic threshold (+1.4V) of an output high to low transition. tpd+ (D) Latch Disable to Output High Delay: The propagation delay measured from the latch signal crossing the TTL logic threshold (+1.4V) in a low to high transition to the point of the output crossing TTL threshold (+1.4V) in a low to high transition. tpd- (D) Latch Disable to Output Low Delay: The propagation delay measured from the latch signal crossing the TTL threshold (+1.4V) in a low to high transition to the point of the output crossing TTL threshold (+1.4V) in a high to low transition. ts Minimum Setup Time: The minimum time, before the negative transition of the latch signal, that an input signal change must be present in order to be acquired and held at the outputs. th Minimum Hold Time: The minimum time, after the negative transition of the latch signal, that an input signal must remain unchanged in order to be acquired and held at the output. tpd- Minimum Latch Disable Pulse Width: The minimum time that the latch signal must remain high in order to acquire and hold an input signal change. tpw (D) COMPARE 1.4V LATCH LATCH VOD + 5mV 0V 50mV/div LATCH INPUT ts VIN th tpw (D) VOD VOS 1V/div OUTPUT tpd tpd+ (D) 0V 1.4V COMPARATOR OUTPUT 5ns/div Figure 2. MAX9201/MAX9202/MAX9203 Diagram Figure 3. tPD+ Response Time to 5mV Overdrive _______________________________________________________________________________________ 7 MAX9201/9202/9203 Power Supplies The MAX9201/MAX9202/MAX9203 can be powered from separate analog and digital supplies or from a single +5V supply. The analog supply can range from +5V to +10V with VEE grounded for single-supply operation (Figures 1a and 1b) or from a split ±5V supply (Figure 1c). The VDD digital supply always requires +5V. In high-speed, mixed-signal applications where a common ground is shared, a noisy digital environment can adversely affect the analog input signal. When set up with separate supplies, the MAX9201/MAX9202/MAX9203 isolate analog and digital signals by providing a separate analog ground (VEE) and digital ground (GND). MAX9201/9202/9203 Low Cost, 7ns, Low-Power Voltage Comparators INPUT 50mV/div 0V INPUT TO 10X SCOPE PROBE (10MΩ 14pF) VCC = +5V VOD + 5mV OUTPUT 10kΩ 1kΩ PRECISION STEP GENERATOR 100nF OUTPUT TO 10X SCOPE PROBE (10MΩ 14pF) 1V/div 0V 100nF RL 2.43kΩ D.U.T. 10kΩ VCC OFFSET ADJUST VDD = +5V 100nF 5ns/div 10kΩ 100nF VEE = -5V Figure 4. tPD- Response Time to 5mV Overdrive Figure 5. Response-Time Setup OUTPUT OUTPUT 2V/div 2V/div 0V 0V 10mV/div 10mV/div 0V 0V INPUT INPUT 5ns/div 5ns/div Figure 7. Response to 100MHz Sine Wave Figure 6. Response to 50MHz Sine Wave Chip Information MAX9201 TRANSISTOR COUNT: 348 MAX9202 TRANSISTOR COUNT: 176 MAX9203 TRANSISTOR COUNT: 116 PROCESS: Bipolar 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 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.