19-1129; Rev 6; 2/08 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators ____________________________Features The MAX961–MAX964/MAX997/MAX999 are low-power, ultra-high-speed comparators with internal hysteresis. These devices are optimized for single +3V or +5V operation. The input common-mode range extends 100mV Beyond-the-Rails™, and the outputs can sink or source 4mA to within 0.52V of GND and V CC . Propagation delay is 4.5ns (5mV overdrive), while supply current is 5mA per comparator. The MAX961/MAX963/MAX964 and MAX997 have a shutdown mode in which they consume only 270µA supply current per comparator. The MAX961/MAX963 provide complementary outputs and a latch-enable feature. Latch enable allows the user to hold a valid comparator output. The MAX999 is available in a tiny SOT23-5 package. The single MAX961/MAX997 and dual MAX962 are available in space-saving 8-pin µMAX® packages. ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ________________________Applications Ultra-Fast, 4.5ns Propagation Delay Ideal for +3V and +5V Single-Supply Applications Beyond-the-Rails Input Voltage Range Low, 5mA Supply Current (MAX997/MAX999) 3.5mV Internal Hysteresis for Clean Switching Output Latch (MAX961/MAX963) TTL/CMOS-Compatible Outputs Shutdown Mode (MAX961/MAX963/MAX964/MAX997) ♦ Available in Space-Saving Packages: 5-Pin SOT23 (MAX999) 8-Pin µMAX (MAX961/MAX962/MAX997) 16-Pin QSOP (MAX964) Ordering Information PART TOP MARK PIN-PACKAGE PKG CODE Single 3V/5V Systems MAX961ESA 8 SO — S8-2 Portable/Battery-Powered Systems MAX961EUA-T 8 µMAX-8 — U8-1 Threshold Detectors/Discriminators GPS Receivers MAX962ESA 8 SO — S8-2 MAX962EUA-T 8 µMAX-8 — U8-1 MAX963ESD 14 SO — S14-1 Line Receivers MAX964ESE 16 Narrow SO — S16-1 Zero-Crossing Detectors MAX964EEE 16 QSOP — E16-1 High-Speed Sampling Circuits MAX997ESA 8 SO — S8-2 MAX997EUA-T 8 µMAX-8 — U8-1 MAX999AAUK+T 5 SOT23-5 +AFEI U5+1 MAX999EUK-T 5 SOT23-5 ACAB U5-1 PIN-PACKAGE LATCH ENABLE SHUTDOWN COMPLEMENTARY OUTPUT NO. OF COMPARATORS PART Selector Guide Note: All E grade devices are specified over the -40°C to +85°C operating temperature range. MAX999AAUK is specified over the -40°C to +125°C operating temperature range. +Denotes a lead-free package. Pin Configurations TOP VIEW MAX961 1 Yes Yes Yes 8 SO/µMAX MAX962 2 No No No 8 SO/µMAX MAX963 2 Yes Yes Yes 14 SO MAX964 4 No Yes No 16 SO/QSOP MAX997 1 No Yes No 8 SO/µMAX MAX999 1 No No No 5 SOT23 Beyond-the-Rails is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc. Q 1 GND 2 IN+ 3 5 VCC 4 IN- MAX999 SOT23-5 Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1 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. MAX961–MAX964/MAX997/MAX999 _________________General Description MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC to GND................................... -0.3V to +6V All Other Pins..............................................-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 SOT23 (derate 7.1mW/°C above +70°C).......571mW/°C 8-Pin SO (derate 5.88mW/°C above +70°C)...........471mW/°C 8-Pin µMAX (derate 4.10mW/°C above +70°C) ......330mW/°C 14-Pin SO (derate 8.33mW/°C above +70°C).........667mW/°C 16-Pin SO (derate 8.70mW/°C above +70°C).........696mW/°C 16-Pin QSOP (derate 8.33mW/°C above +70°C)....667mW/°C Operating Temperature Range MAX96_E/MAX99_E.........................................-40°C to +85°C MAX999AAUK ...............................................-40°C to +125°C Storage Temperature Range ............................ -65°C to +160°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 = +2.7V to +5.5V, VCM = 0V, COUT = 5pF, VSHDN = 0V, VLE = 0V, unless otherwise noted. TMIN to TMAX is -40°C to +85°C for all E grade devices. For MAX999AAUK only, TMIN to TMAX is -40°C to +125°C.) (Note 1) PARAMETER Supply Voltage Input Common-Mode Voltage Range Input-Referred Trip Points SYMBOL VCC CONDITIONS Input Bias Current 2 MAX MIN TYP MAX UNITS 5.5 2.7 5.5 V VCMR (Note 2) -0.1 VCC + 0.1 -0.1 VCC + 0.1 V VTRIP VCM = -0.1V or 5.1V, VCC = 5V (Note 3) µMAX, SOT23 ±2.0 ±3.5 ±6.5 MAX999AAUK ±2.0 ±3.5 ±8.0 All other E packages ±2.0 ±3.5 ±4.0 µMAX, SOT23 ±0.5 ±1.5 ±4.5 MAX999AAUK ±0.5 ±1.5 ±6.0 All other E packages ±0.5 ±1.5 ±2.0 ±15 ±30 ±15 ±15 3.5 VOS IB VCM = -0.1V or 5.1V, VCC = 5V (Note 4) µMAX, SOT23 VIN+ = VIN= 0V or VCC, All other E VCC = 5V packages VCC = 5.5V, VIN- = 0V, IIN+ = 100µA Input Capacitance Common-Mode Input TYP 2.7 Differential Input Clamp Voltage Differential Input Impedance MIN TMIN to TMAX Inferred by PSRR Input-Referred Hysteresis Input Offset Voltage TA = +25°C mV mV mV µA 2.1 V 3 pF RIND VCC = 5V 8 kΩ RINCM VCC = 5V 130 kΩ _______________________________________________________________________________________ Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators (VCC = +2.7V to +5.5V, VCM = 0V, COUT = 5pF, VSHDN = 0V, VLE = 0V, unless otherwise noted. TMIN to TMAX is -40°C to +85°C for all E grade devices. For MAX999AAUK only, TMIN to TMAX is -40°C to +125°C.) (Note 1) PARAMETER SYMBOL TA = +25°C CONDITIONS MIN Common-Mode Rejection Ratio Power-Supply Rejection Ratio Output High Voltage Output Low Voltage CMRR VCC = 5V, VCM = -0.1V to 5.1V (Note 5) µMAX, SOT23 0.1 0.3 1.0 All other E packages 0.1 0.3 0.5 0.05 0.3 0.3 VOH ISOURCE = 4mA Capacitive Slew Current TYP MAX mV/V VCM = 0V (Note 6) ISINK = 4mA MIN UNITS MAX PSRR VOL TMIN to TMAX TYP E grade VCC 0.52 VCC 0.52 MAX999AAUK VCC 0.52 VCC 0.55 V E grade 0.52 0.52 MAX999AAUK 0.52 0.55 VOUT = 1.4V, VCC = 2.7V 30 Output Capacitance 60 MAX961/MAX963, VCC = 5V ICC Shutdown Supply Current per Comparator ISHDN t R, t F Logic-Input High VIH Logic-Input Low VIL Logic-Input Current IIL, IIH Propagation Delay tPD Differential Propagation Delay tPD Propagation-Delay Skew tSKEW pF 11 11 MAX962/MAX964, VCC = 5V 5 8 9 MAX997/MAX999E, VCC = 5V 5 6.5 6.5 MAX999AAUK, VCC = 5V 5 6.5 7.0 0.27 0.5 0.5 mA 1 20 µA MAX961/MAX963/MAX964/ MAX997, VCC = 5V MAX961/MAX963/MAX964/ MAX997, VOUT = 5V and VCC - 5V Shutdown Output Leakage Current Rise/Fall Time 7.2 V mA 4 Supply Current per Comparator mV/V VCC = 5V 2.3 ns VCC/2 + 0.4 VCC/2 + 0.4 VLOGIC = 0V or VCC 5mV overdrive (Note 7) mA V VCC/2 - 0.4 VCC/2 - 0.4 V ±15 ±30 µA E grade 4.5 7.0 8.5 MAX999AAUK 4.5 7.0 10 Between any two channels or outputs (Q/Q) 0.3 ns Between tPD- and tPD+ 0.3 ns ns _______________________________________________________________________________________ 3 MAX961–MAX964/MAX997/MAX999 ELECTRICAL CHARACTERISTICS (continued) MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +5.5V, VCM = 0V, COUT = 5pF, VSHDN = 0V, VLE = 0V, unless otherwise noted. TMIN to TMAX is -40°C to +85°C for all E grade devices. For MAX999AAUK only, TMIN to TMAX is -40°C to +125°C.) (Note 1) PARAMETER Data-to-Latch Setup Time Latch-to-Data Hold Time SYMBOL CONDITIONS TA = +25°C MIN TYP TMIN to TMAX MAX MIN TYP MAX UNITS tSU MAX961/MAX963 (Note 8) 5 5 ns tH MAX961/MAX963 (Note 8) 5 5 ns Latch Pulse Width tLPW MAX961/MAX963 (Note 8) 5 5 ns Latch Propagation Delay tLPD MAX961/MAX963 (Note 8) 10 10 ns Shutdown Time tOFF Delay until output is high-Z (> 10kΩ) 150 ns Shutdown Disable Time tON Delay until output is valid 250 ns Note 1: The MAX961EUA/MAX962EUA/MAX997EUA/MAX999EUK are 100% production tested at TA = +25°C; all temperature specifications are guaranteed by design. Note 2: Inferred by CMRR. Either input can be driven to the absolute maximum limit without false output inversion, provided that the other input is within the input voltage range. Note 3: The input-referred trip points are the extremities of the differential input voltage required to make the comparator output change state. The difference between the upper and lower trip points is equal to the width of the input-referred hysteresis zone. (See Figure 1.) Note 4: Input offset voltage is defined as the mean of the trip points. Note 5: CMRR = (VOSL - VOSH) / 5.2V, where VOSL is the offset at VCM = -0.1V and VOSH is the offset at VCM = 5.1V. Note 6: PSRR = (VOS2.7 - VOS5.5) / 2.8V, where VOS2.7 is the offset voltage at VCC = 2.7V, and VOS5.5 is the offset voltage at VCC = 5.5V. Note 7: Propagation delay for these high-speed comparators is guaranteed by design characterization because it cannot be accurately measured using automatic test equipment. A statistically significant sample of devices is characterized with a 200mV step and 100mV overdrive over the full temperature range. Propagation delay can be guaranteed by this characterization, since DC tests ensure that all internal bias conditions are correct. For low overdrive conditions, VTRIP is added to the overdrive. Note 8: Guaranteed by design. 4 _______________________________________________________________________________________ Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators 6.0 5.5 5.0 4.5 tPD+ 6.0 tPD- 5.8 5.6 MAX997toc03 tPD6 tPD+ 5 4 5.0 -40 10 20 30 40 50 60 70 80 90 100 -20 0 20 40 60 0 85 20 40 60 80 100 INPUT OVERDRIVE (mV) TEMPERATURE (°C) CAPACITIVE LOAD (pF) PROPAGATION DELAY vs. SUPPLY VOLTAGE OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT OUTPUT LOW VOLTAGE vs. SINK CURRENT TA = +85°C 2.75 tPD- 0.4 VOL (V) VOH (V) 5.5 0.5 TA = +25°C TA = -40°C 2.70 2.65 120 MAX997toc06 2.80 MAX997toc04 6.0 MAX997toc05 0 7 5.2 tPD+ 3.5 TA = -40°C TA = +25°C TA = +85°C 0.3 0.2 2.60 0.1 2.55 tPD+ 0 2.50 5.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 1 10 100 1000 1 10,000 10 100 1000 10,000 SUPPLY VOLTAGE (V) SOURCE CURRENT (μA) SINK CURRENT (μA) MAX961/MAX963 SUPPLY CURRENT PER COMPARATOR vs. SUPPLY VOLTAGE MAX962/MAX964 SUPPLY CURRENT PER COMPARATOR vs. SUPPLY VOLTAGE MAX997/MAX999 SUPPLY CURRENT PER COMPARATOR vs. SUPPLY VOLTAGE TA = +85°C 7.0 TA = +25°C 6.5 6 TA = +85°C 5 8 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 7.5 9 TA = +25°C TA = -40°C MAX9997toc7C 7 MAX997toc07A 8.0 MAX997toc07B PROPAGATION DELAY (ns) 6.2 5.4 tPD- SUPPLY CURRENT (mA) 6.4 PROPAGATION DELAY (ns) 6.5 8 MAX997toc0202 6.6 PROPAGATION DELAY (ns) 7.0 PROPAGATION DELAY (ns) 6.8 MAX997toc01 7.5 4.0 PROPAGATION DELAY vs. CAPACITIVE LOAD PROPAGATION DELAY vs. TEMPERATURE PROPAGATION DELAY vs. INPUT OVERDRIVE 7 6 TA = +25°C TA = +85°C 5 4 TA = -40°C 4 TA = -40°C 6.0 3 2 3 4 SUPPLY VOLTAGE (V) 5 6 3 2 3 4 SUPPLY VOLTAGE (V) 5 6 2 3 4 5 6 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 MAX961–MAX964/MAX997/MAX999 __________________________________________Typical Operating Characteristics (VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA = +25°C, unless otherwise noted.) ____________________________Typical Operating Characteristics (continued) (VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA = +25°C, unless otherwise noted.) MAX961/MAX963/MAX964/MAX997 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE VOLTAGE TRIP POINT/INPUT OFFSET VOLTAGE vs. TEMPERATURE 160 1 VOS 0 -1 -2 0 20 60 40 -40 80 MAX997toc10 VOS -1 VTRIP- -20 0 20 40 60 85 2 3 4 SUPPLY VOLTAGE (V) INPUT BIAS CURRENT (IB+, IB-) vs. COMMON-MODE VOLTAGE INPUT BIAS CURRENT/INPUT OFFSET CURRENT vs. TEMPERATURE SHORT-CIRCUIT OUTPUT CURRENT vs. TEMPERATURE 2 0 TA = -40°C -4 -6 3.5 IB+ 3.0 2.5 2.0 1.5 1.0 0.5 0 1 2 3 4 5 100 OUTPUT SHORTED TO GND (SOURCING) 80 60 40 0 -0.5 6 OUTPUT SHORTED TO VCC (SINKING) 120 20 IOS 0 -8 140 MAX997toc13 IB- SHORT-CIRCUIT CURRENT (mA) TA = +25°C 4.0 MAX997toc12 VCC = 5.0V VIN = VOS NEGATIVE VALUES REPRESENT CURRENT FLOWING INTO THE DEVICE INPUT BIAS/OFFSET CURRENT (μA) 4 MAX997toc11 6 -40 -20 VCM (V) 0 20 40 60 -40 80 -20 0 MAX997toc14 VIN = 100mVP-P INPUT 50mV/div VOS 20 40 TEMPERATURE (°C) TEMPERATURE (°C) 50MHz RESPONSE OUTPUT 1V/div GND 5ns/div 6 6 5 TEMPERATURE (°C) TA = +85°C -1 0 TEMPERATURE (°C) 8 -2 1 -4 -3 60 -20 VTRIP+ -3 VTRIP-40 2 -2 VCC = 2.7V 110 3 TRIP POINT / VOS (mV) TRIP POINT / VOS (mV) 210 VTRIP+ 2 4 MAX997toc09 VCC = 5.0V 260 VOLTAGE TRIP POINT/INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE 3 MAX997toc08 SHUTDOWN SUPPLY CURRENT (μA) 310 IB+, IB- (μA) MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators _______________________________________________________________________________________ 60 80 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators PROPAGATION DELAY (tPD-) PROPAGATION DELAY (tPD+) MAX997toc15 MAX997toc16 GND INPUT 50mV/div INPUT 50mV/div GND OUTPUT 1V/div OUTPUT 1V/div GND GND 5ns/div 5ns/div ______________________________________________________________Pin Description PIN NAME FUNCTION MAX997 MAX999 MAX961 MAX962 MAX963 MAX964 1, 5 — — — — — 2 4 2 2 1 1 3 3 1 1 2 2 — — 4 — 3, 5 — LE, LEA, LEB 4 2 5 5 4, 11 12 GND Ground — — — — — 16 N.C. No Connection. Connect to GND to prevent parasitic feedback. — — — 4 6 3 INB- Comparator B Inverting Input — — — 3 7 4 INB+ Comparator B Noninverting Input — — — — — — — 5 INC- Comparator C Inverting Input — 6 INC+ Comparator C Noninverting Input N.C. IN-, INA- No Connection. Not internally connected. Comparator A Inverting Input IN+, INA+ Comparator A Noninverting Input Latch-Enable Input. The output latches when LE_ is high. The latch is transparent when LE_ is low. — — — — — — — 7 IND- Comparator D Inverting Input — — — — — 8 IND+ Comparator D Noninverting Input 8 — 3 — 8 9 SHDN Shutdown Input. The device shuts down when SHDN is high. — — — 6 9 14 QB Comparator B Output — — — — 11 QC Comparator C Output — — — — 10 QD Comparator D Output — — — — — — 10 — QB Comparator B Complementary Output 7 5 8 8 12 13 VCC Positive Supply Input (VCC to GND must be ≤5.5V) 6 1 6 7 13 15 Q, QA Comparator A TTL Output — — 7 — 14 — Q, QA Comparator A Complementary Output _______________________________________________________________________________________ 7 MAX961–MAX964/MAX997/MAX999 ____________________________Typical Operating Characteristics (continued) (VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA = +25°C, unless otherwise noted.) MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators _______________Detailed Description The MAX961–MAX964/MAX997/MAX999 single-supply comparators feature internal hysteresis, ultra-highspeed operation, and low power consumption. Their outputs are guaranteed to pull within 0.52V of either rail without external pullup or pulldown circuitry. Beyondthe-Rails input voltage range and low-voltage, singlesupply operation make these devices ideal for portable equipment. These comparators all interface directly to CMOS logic. Timing Most high-speed comparators oscillate in the linear region because of noise or undesirable parasitic feedback. This can occur when the voltage on one input is close to or equal to the voltage on the other input. These devices have a small amount of internal hysteresis to counter parasitic effects and noise. The added hysteresis of the MAX961–MAX964/MAX997/ MAX999 creates two trip points: one for the rising input voltage and one for the falling input voltage (Figure 1). The difference between the trip points is the hysteresis. When the comparator’s input voltages are equal, the hysteresis effectively causes one comparator input voltage to move quickly past the other, thus taking the input out of the region where oscillation occurs. Standard comparators require hysteresis to be added with external resistors. The fixed internal hysteresis eliminates these resistors. The MAX961/MAX963 include internal latches that allow storage of comparison results. LE has a high input impedance. If LE is low, the latch is transparent (i.e., the comparator operates as though the latch is not present). The comparator’s output state is stored when LE is pulled high. All timing constraints must be met when using the latch function (Figure 2). Input Stage Circuitry The MAX961–MAX964/MAX997/MAX999 include internal protection circuitry that prevents damage to the precision input stage from large differential input voltages. This protection circuitry consists of two groups of three front-to-back diodes between IN+ and IN-, as well as two 200Ω resistors (Figure 3). The diodes limit the differential voltage applied to the comparator’s internal circuitry to no more than 3VF, where VF is the diode’s forward-voltage drop (about 0.7V at +25°C). VTRIP+ VIN+ VHYST VOS = VTRIP+ + VTRIP2 VIN- = 0V VTRIP- VOH Q VOL Q VOH VOL Figure 1. Input and Output Waveforms, Noninverting Input Varied 8 _______________________________________________________________________________________ Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators tH DIFFERENTIAL INPUT VOLTAGE VOS tLPW VCC VCC 2 LE 0V tPD tLPD VOH VCC 2 Q VOL VCC 2 Q tSKEW tSKEW Figure 2. MAX961/MAX963 Timing Diagram MAX961-MAX964 MAX997 MAX999 200Ω IN+ IN200Ω TO INTERNAL CIRCUITRY TO INTERNAL CIRCUITRY For a large differential input voltage (exceeding 3VF), this protection circuitry increases the input bias current at IN+ (source) and IN- (sink). (IN+ - IN-) - 3VF Input current = ———————— 2 x 200 Input currents with large differential input voltages should not be confused with input bias currents (IB). As long as the differential input voltage is less than 3VF, this input current is less than 2IB. The input circuitry allows the MAX961–MAX964/ MAX997/MAX999’s input common-mode range to extend 100mV beyond both power-supply rails. The output remains in the correct logic state if one or both inputs are within the common-mode range. Taking either input outside the common-mode range causes the input to saturate and the propagation delay to increase. Figure 3. Input Stage Circuitry _______________________________________________________________________________________ 9 MAX961–MAX964/MAX997/MAX999 tSU MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators VCC ISOURCE MAX961-MAX964 MAX997 MAX999 Q, Q ISINK GND Figure 5. MAX961 PCB Layout Figure 4. Output Stage Circuitry Output Stage Circuitry The MAX961–MAX964/MAX997/MAX999 contain a current-driven output stage, as shown in Figure 4. During an output transition, ISOURCE or ISINK is pushed or pulled to the output pin. The output source or sink current is high during the transition, creating a rapid slew rate. Once the output voltage reaches VOH or VOL, the source or sink current decreases to a small value, capable of maintaining the VOH or VOL in static condition. This decrease in current conserves power after an output transition has occurred. One consequence of a current-driven output stage is a linear dependence between the slew rate and the load capacitance. A heavy capacitive load slows down the voltage output transition. Shutdown Mode When SHDN is high, the MAX961/MAX963/MAX964/ MAX997 shut down. When shut down, the supply current drops to 270µA per comparator, and the outputs become high impedance. SHDN has a high input impedance. Connect SHDN to GND for normal operation. Exit shutdown with LE low; otherwise, the output is indeterminate. 10 __________Applications Information Circuit Layout and Bypassing The MAX961–MAX964/MAX997/MAX999’s high bandwidth requires a high-speed layout. Follow these layout guidelines: 1) Use a PCB with a good, unbroken, low-inductance ground plane. 2) Place a decoupling capacitor (a 0.1µF ceramic surface-mount capacitor is a good choice) as close to VCC as possible. 3) On the inputs and outputs, keep lead lengths short to avoid unwanted parasitic feedback around the comparators. Keep inputs away from outputs. Keep impedance between the inputs low. 4) Solder the device directly to the printed circuit board rather than using a socket. 5) Refer to Figure 5 for a recommended circuit layout. 6) For slow-moving input signals, take care to prevent parasitic feedback. A small capacitor (1000pF or less) placed between the inputs can help eliminate oscillations in the transition region. This capacitor causes negligible degradation to t PD when the source impedance is low. ______________________________________________________________________________________ Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators TOP VIEW 8 VCC INA+ 1 7 Q INA- 2 SHDN 3 6 Q LE 4 5 GND IN+ 1 IN- 2 MAX961 8 VCC 7 QA INB+ 3 6 QB INB- 4 5 GND MAX962 SO/μMAX SO/μMAX INA- 1 14 QA INA- 1 16 N.C. INA+ 2 13 QA INA+ 2 15 QA LEA 3 12 VCC INB- 3 14 QB 11 GND INB+ 4 10 QB INC- 5 12 GND INB- 6 9 QB INC+ 6 11 QC INB+ 7 8 SHDN IND- 7 10 QD IND+ 8 9 GND 4 MAX963 LEB 5 MAX964 13 VCC 8 SHDN 7 VCC IN+ 3 6 Q GND 4 5 N.C. N.C. 1 IN- 2 MAX997 SO/μMAX SHDN SO SO/QSOP ___________________Chip Information MAX961/MAX962 TRANSISTOR COUNT: 286 MAX963/MAX964 TRANSISTOR COUNT: 607 MAX997/MAX999 TRANSISTOR COUNT: 142 ______________________________________________________________________________________ 11 MAX961–MAX964/MAX997/MAX999 Pin Configurations 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.) 4X S 8 E Ø0.50±0.1 8 INCHES DIM A A1 A2 b H c D e E H 0.6±0.1 1 L 1 α 0.6±0.1 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 MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators 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 4.78 5.03 0.41 0.66 0° 6° 0.5250 BSC TOP VIEW A1 A2 e FRONT VIEW A α c b L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 12 ______________________________________________________________________________________ REV. J 1 1 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators QSOP.EPS ______________________________________________________________________________________ 13 MAX961–MAX964/MAX997/MAX999 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.) 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 MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails 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 14 ______________________________________________________________________________________ REV. B 1 1 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators SOT-23 5L .EPS ______________________________________________________________________________________ 15 MAX961–MAX964/MAX997/MAX999 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.) MAX961–MAX964/MAX997/MAX999 Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 9/96 Initial release 1 12/96 Added 8-pin µMAX packages. Correct minor errors. 1, 2, 3 — 2 3/97 Added dual and quad MAX963/MAX964 packages. 1, 2, 3 3 7/97 Added new MAX997 and MAX999 parts. 4 3/99 New wafer fab/process change to CB20. Update specifications and TOCs. 1, 2, 3 2, 3, 4, 5, 6 5 2/07 Added new Current into Input Pins in the Absolute Maximum Ratings. 2 6 12/07 Added new automotive grade MAX999AAUK part and specifications. 1, 2, 3 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.