19-0157; Rev 2; 8/03 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators Features Ultra Fast (10ns) Single +5V or Dual 5V Supply Operation Input Range Extends Below Negative Supply Low Power: 6mA (+5V) Per Comparator No Minimum Input Signal Slew-Rate Requirement No Power-Supply Current Spiking Stable in the Linear Region Inputs Can Exceed Either Supply Low Offset Voltage: 0.8mV Now Available in a Small MAX Package Ordering Information PART TEMP RANGE PIN-PACKAGE 0C to +70C 16 Plastic DIP MAX912CSE 0C to +70C 16 Narrow SO MAX912EPE -40C to +85C 16 Plastic DIP Ethernet Line Receivers MAX912ESE -40C to +85C 16 Narrow SO Switching Regulators MAX913CPA 0C to +70C High-Speed Sampling Circuits MAX913CSA 0C to +70C High-Speed Triggers MAX913EPA -40C to +85C 8 Plastic DIP Extended Range V/F Converters MAX913ESA -40C to +85C 8 SO Fast Pulse Width/Height Discriminators MAX913EUA -40C to +85C 8 MAX Applications Zero-Crossing Detectors MAX912CPE 8 Plastic DIP 8 SO Pin Configurations TOP VIEW MAX912 MAX913 V+ 1 8 Q IN+ 2 7 Q 3 6 GND V- 4 5 LE IN- DIP/SO/MAX QA 1 16 QB QA 2 15 QB 14 GND GND 3 LEA 4 N.C. 5 V- 6 13 LEB A B 12 N.C. 11 V+ INA- 7 10 INB- INA+ 8 9 INB+ DIP/NARROW SO ________________________________________________________________ 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 MAX912/MAX913 General Description The MAX913 single and MAX912 dual, high-speed, low-power comparators have differential inputs and complementary TTL outputs. Fast propagation delay (10ns, typ), extremely low supply current, and a wide common-mode input range that includes the negative rail make the MAX912/MAX913 ideal for low-power, high-speed, single +5V (or 5V) applications such as V/F converters or switching regulators. The MAX912/MAX913 outputs remain stable through the linear region. This feature eliminates output instability common to high-speed comparators when driven with a slow-moving input signal. The MAX912/MAX913 can be powered from a single +5V supply or a 5V split supply. The MAX913 is an improved plug-in replacement for the LT1016. It provides significantly wider input voltage range and equivalent speed at a fraction of the power. The MAX912 dual comparator has equal performance to the MAX913 and includes independent latch controls. MAX912/MAX913 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators ABSOLUTE MAXIMUM RATINGS 8-Pin SO (derate 5.88mW/C above +70C)................471mW 8-Pin MAX (derate 4.5mW/C above +70C) .............362mW 16-Pin Plastic DIP (derate 10.53mW/C above +70C)842mW 16-Pin Narrow SO (derate 8.70mW/C above +70C) .696mW Operating Temperature Ranges: MAX91_C_ _ ...........................................................0C to +70C MAX91_E_ _.........................................................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Positive Supply Voltage .........................................................+7V Negative Supply Voltage ........................................................-7V V+ to V- ................................................................................+13V Differential Input Voltage .....................................................+15V Input Voltage (Referred to V-) ................................-0.3V to +14V Latch Pin Voltage .............................................Equal to Supplies Continuous Output Current...............................................20mA Continuous Power Dissipation (TA = +70C) 8-Pin Plastic DIP (derate 9.09mW/C above +70C) ...727mW 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 V+ = +5V, V- = -5V, VQ = 1.4V, VLE = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Input Offset Voltage (Note 2) Offset Drift Input Offset Current (Note 2) Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Small-Signal Voltage Gain SYMBOL VOS RS 100 MIN TA = +25C IOS IB VCM CMRR PSRR AV VOH VOL Positive Supply Current Per Comparator (Note 3) I+ Negative Supply Current Per Comparator (Note 3) I- Latch-Pin High Input Voltage VIH Latch-Pin Low Input Voltage VIL Latch-Pin Current IIL TYP MAX 0.1 2 TA = TMIN TO TMAX 3 TCVOS Output Voltage 2 CONDITIONS 2 TA = +25C 0.3 TA = TMIN TO TMAX 2 C, E temperature ranges 5 8 C, E temperature ranges -5.2 +3.5 Single +5V -0.2 +3.5 C, E temperature ranges -5.0V VCM +3.5V 80 110 Positive supply; 4.5V V+ 5.5V 60 85 Negative supply; -2V V- -7V 80 100 1V VQ 2V, TA = +25C V+ 4.5V 1500 3500 IOUT = 1mA 2.7 3.4 IOUT = 10mA 2.4 3.0 ISINK = 4mA 0.3 TA = +25C, ISINK = 10mA 0.4 C, E temperature ranges A A V dB dB V/V 0.5 V 6 10 mA 1 2 mA 2.0 VLE = 0V mV V/C 0.5 1 TA = +25C UNITS V -1 _______________________________________________________________________________________ 0.8 V -20 A Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators V+ = +5V, V- = -5V, VQ = 1.4V, VLE = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Propagation Delay (Note 4) Differential Propagation Delay (Note 4) SYMBOL tPD+, tPD- tPD Channel-to-Channel Propagation Delay (Note 4) Latch Setup Time (Note 5) Latch Hold Time (Note 5) Latch Propagation Delay (Note 6) CONDITIONS VIN = 100mV, VOD = 5mV TA = +25C VIN = 100mV, VOD = 20mV TA = +25C MIN TYP MAX 10 14 9 12 TA = TMIN TO TMAX 16 TA = TMIN TO TMAX VIN = 100mV, VOD = 5mV TA = +25C VIN = 100mV, VOD = 5mV (MAX912 only) TA = +25C ns 15 MAX913 2 4 MAX912 3 5 tSU 2 tH 5 tLPD UNITS ns 500 ps 0 ns 2 ns 7 ns Note 1: All specifications are 100% tested at TA = +25C, unless otherwise noted. Specification limits over temperature (TA = TMIN to TMAX) are guaranteed by design. Note 2: Input Offset Voltage (VOS) is defined as the average of the two input offset voltages, measured by forcing first one output, then the other to 1.4V. Input Offset Current (IOS) is defined the same way. Note 3: Supply currents are measured with VQ driven to both VOH and VOL (not 1.4V). Note 4: Propagation Delay (tPD) and Differential Propagation Delay (tPD) cannot be measured in automatic handling equipment with low input overdrive values. Characterization and correlation tests have shown that tPD and tPD limits can be guaranteed by design. Electrical Characteristic DC tests are performed to guarantee that all internal bias conditions are correct. For low overdrive conditions, VOS is added to overdrive. Differential Propagation Delay is defined as tPD = tPD+ - tPD-. Note 5: Input latch setup time (tSU) is the interval in which the input signal must be stable prior to asserting the latch signal. The hold time (tH) is the interval after the latch is asserted in which the input signal must be stable. These parameters are guaranteed by design. Note 6: Latch Propagation Delay (tLPD) is the delay time for the output to respond when the latch-enable pin is deasserted (see Timing Diagram). _______________________________________________________________________________________ 3 MAX912/MAX913 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (V+ = +5V, V- = -5V, VLE = 0V, CL = 15pF, TA = +25C, unless otherwise noted.) 8 tPD+ tPD- 18 16 14 12 10 tPD+ 8 6 tPD- 14 VOD = 10mV 12 10 PROPAGATION DELAY vs. TEMPERATURE Q OUTPUT tPD- 7 1.4 1.2 5 TA = +25C TA = -40C 20 40 TEMPERATURE (C) 60 0.2 3 80 4 OFFSET VOLTAGE vs. TEMPERATURE 400 300 200 -20 0 20 40 TEMPERATURE (C) 60 80 2 3 4 5 6 V- (V) INPUT BIAS CURRENT vs. TEMPERATURE OUTPUT VOLTAGE vs. DIFFERENTIAL INPUT VOLTAGE 2.0 VCM = -5.2V 1.5 1.0 VCM = 0V VCM = 3.5V 7 5 4 3 2 1 0 0 1 V+ (V) 2.5 0.5 100 0 7 6 MAX912/13 toc08 500 5 3.0 INPUT BIAS CURRENT (A) MAX912/13 toc07 600 -40 TA = -40C 0.4 OUTPUT VOLTAGE (V) 0 0.8 1 0 -20 TA = +25C 0.6 2 -40 50 TA = +85C 1.0 6 3 Q OUTPUT tPD+ 40 NEGATIVE SUPPLY CURRENT (PER COMPARATOR) vs. NEGATIVE SUPPLY VOLTAGE TA = +85C 4 30 POSITIVE SUPPLY CURRENT (PER COMPARATOR) vs. POSITIVE SUPPLY VOLTAGE I- (mA) 8 20 10 LOAD CAPACITANCE (pF) 8 I+ (mA) PROPAGATION DELAY (ns) Q OUTPUT tPD+ 10k SOURCE RESISTANCE () 7 Q OUTPUT tPD- 1k V- = 0 TO 5V 9 5 4 100 10 MAX912/13 toc04 11 6 4 MAX912/13 toc06 INPUT OVERDRIVE (mV) 9 tPD+ 6 0 1 100 MAX912/13 toc05 10 10 8 2 0 5 VOD = 5mV tPD- 10 4 2 1 MAX912/13 toc03 VOD = 10mV MAX912/13 toc09 6 MAX912/13 toc02 9 20 PROPAGATION DELAY (ns) MAX912/13 toc01 PROPAGATION DELAY (ns) 10 7 PROPAGATION DELAY vs. LOAD CAPACITANCE PROPAGATION DELAY vs. SOURCE RESISTANCE PROPAGATION DELAY (ns) PROPAGATION DELAY vs. INPUT OVERDRIVE OFFSET VOLTAGE (V) MAX912/MAX913 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators 0 -40 -20 0 20 40 TEMPERATURE (C) 60 80 -3 -2 -1 0 1 2 DIFFERENTIAL INPUT VOLTAGE (mV) _______________________________________________________________________________________ 3 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators POSITIVE-TO-NEGATIVE PROPAGATION DELAY NEGATIVE-TO-POSITIVE PROPAGATION DELAY INPUT 100mV/div INPUT 100mV/div OUTPUT Q OUTPUT Q 1V/div 1V/div Q Q 5ns/div 5ns/div MAX912/MAX913 RESPONSE TO 50MHZ (10mVP-P) SINE WAVE INPUT 10mV/div OUTPUT Q 2V/div 10ns/div MAX912/MAX913 RESPONSE TO SLOW-MOVING TRIANGLE WAVE INDUSTRY-STANDARD 686 RESPONSE MAX912/MAX913 RESPONSE INPUT 20mV/div INPUT 20mV/div OUTPUT Q 1V/div OUTPUT Q 1V/div Q 1V/div 20s/div Q 1V/div 20s/div _______________________________________________________________________________________ 5 MAX912/MAX913 Typical Operating Characteristics (continued) (V+ = +5V, V- = -5V, VLE = 0V, CL = 15pF, TA = +25C, unless otherwise noted.) Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators MAX912/MAX913 MAX912 Pin Description PIN NAME FUNCTION 1 QA Comparator A TTL Output 2 QA Comparator A Complementary TTL Output 3, 14 GND Logic Ground. Connect both GND pins to ground. 4 LEA Comparator A Latch Enable. QA and QA are latched when LEA is TTL high or floating. Comparator A latch is transparent when LEA is low. 5, 12 N.C. No Connection. Not internally connected. 6 V- Negative Power Supply. -5V for dual supplies (bypass to GND with a 0.1F capacitor) or GND for a single supply. 7 INA- Comparator A Inverting Input 8 INA+ Comparator A Noninverting Input 9 INB+ Comparator B Noninverting Input 10 INB- Comparator B Inverting Input 11 V+ Positive Power Supply, +5V. Bypass to GND with a 0.1F capacitor. 13 LEB Comparator B Latch Enable. QB and QB are latched when LEB is TTL high or floating. Comparator B latch is transparent when LEB is low. 15 QB Comparator B Complementary TTL Output 16 QB Comparator B TTL Output MAX913 Pin Description PIN 6 NAME FUNCTION 1 V+ 2 IN+ Positive Power Supply. Bypass to GND with a 0.1F capacitor. Noninverting Input 3 IN- Inverting Input 4 V- Negative Power Supply. -5V for dual supplies (bypass to GND with a 0.1F capacitor) or GND for a single supply. 5 LE Latch Enable. Q and Q are latched when LE is TTL high or floating. The comparator latch is transparent when LE is low. 6 GND 7 Q TTL Output 8 Q Complementary TTL Output Logic Ground _______________________________________________________________________________________ Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators The MAX912 (dual) and MAX913 (single) high-speed comparators have a unique design that prevents oscillation when the comparator is in its linear region. No minimum input slew rate is required. Many high-speed comparators oscillate in the linear region, as shown in the Typical Operating Characteristics' industry-standard 686 response graph. One way to overcome this oscillation is to sample the output after it has passed through the unstable region. Another practical solution is to add hysteresis. Either solution results in a loss of resolution and bandwidth. Because the MAX912/MAX913 do not need hysteresis, they offer high resolution to all signals--including lowfrequency signals. The MAX912/MAX913 provide a TTL-compatible latch function that holds the comparator output state (Figure 1). As long as Latch Enable (LE) is high or floating, the input signal has no effect on the output state. With LE low, the outputs are controlled by the input differential voltage and the latch is transparent. Input Amplifier A comparator can be thought of as having two sections; an input amplifier and a logic interface. The MAX912/MAX913's input amplifier is fully differential with input offset voltage trimmed to below 2.0mV at +25C. Input common-mode range extends from 200mV below the negative supply rail to 1.5V below the positive power supply. The total common-mode range is 8.7V when operating from 5VDC supplies. The MAX912/MAX913's amplifier has no built-in hysteresis. For highest accuracy, do not add hysteresis. Figure 2 shows how hysteresis degrades resolution. Resolution A comparator's ability to resolve small signal differences--its resolution--is affected by various factors. As with most amplifiers, the most significant factors are the input offset voltage (VOS) and the common-mode and power-supply rejection ratios (CMRR, PSRR). If source impedance is high, input offset current can be significant. If source impedance is unbalanced, the input bias current can introduce another error. For high-speed comparators, an additional factor in resolution is the comparator's stability in its linear region. Many high-speed comparators are useless in their linear region because they oscillate. This makes the differential input voltage region around 0V unusable, as does a high VOS. Hysteresis does not cure the problem, but acts to keep the input away from its linear range (Figure 2). The MAX912/MAX913 do not oscillate in the linear region, which greatly enhances the comparator's resolution. tSU VIN (DIFFERENTIAL) tH LATCH ENABLE (LE) tLPD tPD+ Q tPD Q tPD- Figure 1. Timing Diagram _______________________________________________________________________________________ 7 MAX912/MAX913 Detailed Description MAX912/MAX913 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators Applications Information Power Supplies and Bypassing The MAX912/MAX913 are tested with 5V power supplies that provide an input common-mode range (VCM) of 8.7V (-5.2V to +3.5V). Operation from a single +5V supply provides a common-mode input range of 3.7V (-0.2V to +3.5). Connect V- to GND for single-supply operation. The MAX912/MAX913 will operate from a minimum single-supply voltage of +4.5V. The V+ supply provides power to both the analog input stage and digital output circuits, whereas the V- supply only powers the analog section. Bypass V+ and V- to ground with 0.1F to 1.0F ceramic capacitors in parallel with 10F or greater tantalum capacitors. Connect the ceramic capacitors very close to the MAX912/MAX913's supply pins, keeping leads short to minimize lead inductance. For particularly noisy applications, use ferrite beads on the power-supply lines. Board Layout As with all high-speed components, careful attention to layout is essential for best performance. 1) Use a printed circuit board with an unbroken ground plane. 2) Pay close attention to the bandwidth of bypass components and keep leads short. 3) Avoid sockets; solder the comparator and other components directly to the board to minimize unwanted parasitic inductance and capacitance. Input Slew Rate The MAX912/MAX913 design eliminates the input slewrate requirement imposed on many standard comparators. As long as LE is high after the maximum propagation delay and the input is greater than the comparator's total DC error, the output will be valid without oscillations. Maximum Clock (LE) and Signal Rate The maximum clock and signal rate is 70MHz, based on the comparator's rise and fall time with a 5mV overdrive at +25C (Figure 1). With a 20mV overdrive, the maximum propagation delay is 12ns and the clock signal rate is 85MHz. IN+ HYSTERESIS BAND* IN- Q WITH HYSTERESIS IDEAL (WITHOUT HYSTERESIS) *WHEN HYSTERESIS IS ADDED, A COMPARATOR CANNOT RESOLVE ANY INPUT SIGNAL WITHIN THE HYSTERESIS BAND. Figure 2. Effect of Hysteresis on Input Resolution Chip Information MAX912 TRANSISTOR COUNT: 285 MAX913 TRANSISTOR COUNT: 154 PROCESS: Bipolar 8 _______________________________________________________________________________________ Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators 8 INCHES DIM A A1 A2 b E y 0.500.1 H c D e E H 0.60.1 L 1 1 0.60.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6 0 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 5.03 4.78 0.41 0.66 0 6 0.5250 BSC TOP VIEW A1 A2 A c e b FRONT VIEW L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 _______________________________________________________________________________________ 9 MAX912/MAX913 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX912/MAX913 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0-8 A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 10 ______________________________________________________________________________________ REV. B 1 1 Single/Dual, Ultra-Fast, Low-Power Precision TTL Comparators PDIPN.EPS 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 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX912/MAX913 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)