MAX961 MAX964/ MAX997/MAX999. Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators. General Description

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1 General Description The MAX9 MAX9/ are low-power, ultra-high-speed comparators with internal hysteresis. These devices are optimized for single +V or +V operation. The input common-mode range extends 00mV Beyond-the- Rails, and the outputs can sink or source ma to within 0.V of and VCC. Propagation delay is.ns (mv overdrive), while supply current is ma per comparator. The MAX9/MAX9/MAX9 and MAX99 have a shutdown mode in which they consume only 0μA supply current per comparator. The MAX9/MAX9 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 -pin SOT package. The single MAX9/MAX99 and dual MAX9 are available in space-saving -pin μmax packages. Applications Single V/V Systems Portable/Battery-Powered Systems Threshold Detectors/Discriminators GPS Receivers Line Receivers Zero-Crossing Detectors High-Speed Sampling Circuits Selector Guide PART NO. OF COMPARATORS COMPLEMENTARY OUTPUT SHUTDOWN LATCH ENABLE PIN-PACKAGE MAX9 Yes Yes Yes SO/μMAX MAX9 No No No SO/μMAX MAX9 Yes Yes Yes SO MAX9 No Yes No SO/SOP MAX99 No Yes No SO/μMAX MAX999 No No No SOT Beyond-the-Rails is a trademark and μmax is a registered trademark of Maxim Integrated Products, Inc. Features Ultra-Fast,.ns Propagation Delay Ideal for +V and +V Single-Supply Applications Beyond-the-Rails Input Voltage Range Low, ma Supply Current ().mv Internal Hysteresis for Clean Switching Output Latch (MAX9/MAX9) TTL/CMOS-Compatible Outputs Shutdown Mode (MAX9/MAX9/MAX9/MAX99) Available in Space-Saving Packages: -Pin SOT (MAX999) -Pin μmax (MAX9/MAX9/MAX99) -Pin SOP (MAX9) Ordering Information PART PIN-PACKAGE TOP MARK MAX9ESA SO MAX9EUA-T µmax MAX9ESA SO MAX9EUA-T µmax MAX9ESD SO MAX9ESE Narrow SO MAX9EEE SOP MAX99ESA SO MAX99EUA-T µmax MAX999AAUK+T SOT +AFEI MAX999EUK-T SOT ACAB Note: All E grade devices are specified over the -0 C to + C operating temperature range. MAX999AAUK is specified over the -0 C to + C operating temperature range. +Denotes a lead(pb)-free/rohs-compliant package. Pin Configurations TOP VIEW IN+ MAX999 SOT Pin Configurations continued at end of data sheet. IN- 9-9; Rev ; 9/

2 Absolute Maximum Ratings Supply Voltage, to...-0.v to +V All Other Pins V to ( + 0.V) Current into Input Pins...±0mA Duration of Output Short Circuit to or...continuous Continuous Power Dissipation (T A = +0 C) -Pin SOT (derate.mw/ C above +0 C)...mW/ C -Pin SO (derate.mw/ C above +0 C)...mW/ C -Pin μmax (derate.0mw/ C above +0 C)...0mW/ C -Pin SO (derate.mw/ C above +0 C)...mW/ C -Pin SO (derate.0mw/ C above +0 C)...9mW/ C -Pin SOP (derate.mw/ C above +0 C)...mW/ C Operating Temperature Range MAX9_E/MAX99_E C to + C MAX999AAUK C to + C Storage Temperature Range... - C to +0 C Lead Temperature (soldering, 0s) 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 ( = +.V to +.V, V CM = 0V, C OUT = pf, V SHDN = 0V, V LE = 0V, unless otherwise noted. T MIN to T MAX is -0 C to + C for all E grade devices. For MAX999AAUK only, T MIN to T MAX is -0 C to + C.) (Note ) PARAMETER SYMBOL CONDITIONS T A = +ºC T MIN to T MAX UNITS MIN TYP MAX MIN TYP MAX Supply Voltage Inferred by PSRR.... V Input Common-Mode Voltage Range V CMR (Note ) V Input-Referred Trip Points V TRIP or.v, = V V CM = -0.V (Note ) µmax, SOT ±.0 ±. ±. MAX999AAUK ±.0 ±. ±.0 All other E packages ±.0 ±. ±.0 Input-Referred Hysteresis. mv Input Offset Voltage V OS or.v, = V V CM = -0.V (Note ) µmax, SOT ±0. ±. ±. MAX999AAUK ±0. ±. ±.0 All other E packages ±0. ±. ±.0 mv mv Input Bias Current I B = 0V or, V IN+ = V IN- = V µmax, SOT ± ±0 All other E packages ± ± µa Differential Input Clamp Voltage =.V, V IN- = 0V, I IN+ = 00µA. V Input Capacitance pf Differential Input Impedance Common-Mode Input Impedance R IND = V kω R INCM = V 0 kω Maxim Integrated

3 Electrical Characteristics (continued) ( = +.V to +.V, V CM = 0V, C OUT = pf, V SHDN = 0V, V LE = 0V, unless otherwise noted. T MIN to T MAX is -0 C to + C for all E grade devices. For MAX999AAUK only, T MIN to T MAX is -0 C to + C.) (Note ) PARAMETER SYMBOL CONDITIONS Common-Mode Rejection Ratio Power-Supply Rejection Ratio CMRR = V, V CM = -0.V to.v (Note ) Output High Voltage V OH I SOURCE = ma Output Low Voltage V OL I SINK = ma T A = +ºC T MIN to T MAX UNITS MIN TYP MAX MIN TYP MAX µmax, SOT All other E packages mv/v PSRR V CM = 0V (Note ) mv/v E grade MAX999AAUK E grade MAX999AAUK Capacitive Slew Current V OUT =.V, =.V 0 0 ma Output Capacitance pf Supply Current per Comparator Shutdown Supply Current per Comparator Shutdown Output Leakage Current I CC I SHDN MAX9/MAX9, = V. MAX9/MAX9, = V 9 E, = V.. MAX999AAUK, = V..0 MAX9/MAX9/MAX9/ MAX99, = V MAX9/MAX9/MAX9/ MAX99, V OUT = V and - V V V ma ma 0 µa Rise/Fall Time t R, t F = V. ns Logic-Input High V IH / + 0. Logic-Input Low V IL / - 0. Logic-Input Current I IL, I IH V LOGIC = 0V or ± ±0 µa Propagation Delay t PD overdrive mv (Note ) Differential Propagation Delay t PD Between any two channels or outputs (/) / + 0. / - 0. E grade..0. MAX999AAUK ns Propagation-Delay Skew t SKEW Between t PD- and t PD+ 0. ns V V ns Maxim Integrated

4 Electrical Characteristics (continued) ( = +.V to +.V, V CM = 0V, C OUT = pf, V SHDN = 0V, V LE = 0V, unless otherwise noted. T MIN to T MAX is -0 C to + C for all E grade devices. For MAX999AAUK only, T MIN to T MAX is -0 C to + C.) (Note ) PARAMETER SYMBOL CONDITIONS T A = +ºC T MIN to T MAX UNITS MIN TYP MAX MIN TYP MAX Data-to-Latch Setup Time t SU MAX9/MAX9 (Note ) ns Latch-to-Data Hold Time t H MAX9/MAX9 (Note ) ns Latch Pulse Width t LPW MAX9/MAX9 (Note ) ns Latch Propagation Delay t LPD MAX9/MAX9 (Note ) 0 0 ns Shutdown Time t OFF Delay until output is high-z (> 0kΩ) 0 ns Shutdown Disable Time t ON Delay until output is valid 0 ns Note : The MAX9EUA/MAX9EUA/MAX99EUA/MAX999EUK are 00% production tested at T A = + C; all temperature specifications are guaranteed by design. Note : 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 : 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.) Note : Input offset voltage is defined as the mean of the trip points. Note : CMRR = (V OSL - V OSH ) /.V, where V OSL is the offset at V CM = -0.V and V OSH is the offset at V CM =.V. Note : PSRR = (V OS. - V OS.) /.V, where V OS. is the offset voltage at =.V, and V OS. is the offset voltage at =.V. Note : 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 00mV step and 00mV 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, V TRIP is added to the overdrive. Note : Guaranteed by design. Maxim Integrated

5 Typical Operating Characteristics ( = +.0V, C LOAD = pf, mv of overdrive, T A = + C, unless otherwise noted.) PROPAGATION DELAY (ns) PROPAGATION DELAY vs. INPUT OVERDRIVE t PDt PD INPUT OVERDRIVE (mv) MAX99toc0 PROPAGATION DELAY (ns) PROPAGATION DELAY vs. TEMPERATURE t PD + t PD TEMPERATURE ( C) MAX99toc00 PROPAGATION DELAY (ns) PROPAGATION DELAY vs. CAPACITIVE LOAD t PD- t PD CAPACITIVE LOAD (pf) MAX99toc0 PROPAGATION DELAY (ns).0. PROPAGATION DELAY vs. SUPPLY VOLTAGE t PD - t PD + MAX99toc0 VOH (V) T A = + C T A = + C T A = -0 C OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT MAX99toc0 VOL (V) T A = -0 C T A = + C T A = + C OUTPUT LOW VOLTAGE vs. SINK CURRENT MAX99toc SUPPLY VOLTAGE (V) ,000 SOURCE CURRENT (µa) ,000 SINK CURRENT (µa) SUPPLY CURRENT (ma) MAX9/MAX9 SUPPLY CURRENT PER COMPARATOR vs. SUPPLY VOLTAGE T A = + C T A = + C T A = -0 C MAX99toc0A SUPPLY CURRENT (ma) MAX9/MAX9 SUPPLY CURRENT PER COMPARATOR vs. SUPPLY VOLTAGE T A = + C T A = + C T A = -0 C MAX99toc0B SUPPLY CURRENT (ma) 9 SUPPLY CURRENT PER COMPARATOR vs. SUPPLY VOLTAGE T A = + C T A = + C MAX999tocC.0 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) T A = -0 C Maxim Integrated

6 Typical Operating Characteristics (continued) ( = +.0V, C LOAD = pf, mv of overdrive, T A = + C, unless otherwise noted.) SHUTDOWN SUPPLY CURRENT (µa) MAX9/MAX9/MAX9/MAX99 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE =.0V =.V MAX99toc0 TRIP POINT / VOS (mv) VOLTAGE TRIP POINT/INPUT OFFSET VOLTAGE vs. TEMPERATURE V TRIP+ V OS V TRIP- MAX99toc09 TRIP POINT / VOS (mv) VOLTAGE TRIP POINT/INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE V OS V TRIP+ V TRIP- MAX99toc TEMPERATURE ( C) TEMPERATURE ( C) - SUPPLY VOLTAGE (V) IB+, IB- (µa) INPUT BIAS CURRENT (I B+, I B- ) vs. COMMON-MODE VOLTAGE T A = -0ºC T A = +ºC T A = +ºC =.0V V IN = V OS NEGATIVE VALUES REPRESENT CURRENT FLOWING INTO THE DEVICE MAX99toc INPUT BIAS/OFFSET CURRENT (µa) INPUT BIAS CURRENT/INPUT OFFSET CURRENT vs. TEMPERATURE I B- I B+ I OS MAX99toc SHORT-CIRCUIT CURRENT (µa) SHORT-CIRCUIT OUTPUT CURRENT vs. TEMPERATURE OUTPUT SHORTED TO (SINKING) OUTPUT SHORTED TO (SOURCING) MAX99toc V CM (V) TEMPERATURE (ºC) TEMPERATURE ( C) 0MHz RESPONSE V OS V IN = 00mV P-P MAX99toc INPUT 0mV/div OUTPUT V/div ns/div Maxim Integrated

7 Typical Operating Characteristics (continued) ( = +.0V, C LOAD = pf, mv of overdrive, T A = + C, unless otherwise noted.) PROPAGATION DELAY (t PD+ ) MAX99toc PROPAGATION DELAY (t PD- ) MAX99toc INPUT 0mV/div INPUT 0mV/div OUTPUT V/div OUTPUT V/div ns/div ns/div Pin Description PIN MAX99 MAX999 MAX9 MAX9 MAX9 MAX9 NAME FUNCTION, N.C. No Connection. Not internally connected. IN-, INA- Comparator A Inverting Input IN+, INA+ Comparator A Noninverting Input, LE, LEA, LEB, Ground N.C. Latch-Enable Input. The output latches when LE_ is high. The latch is transparent when LE_ is low. No Connection. Connect to to prevent parasitic feedback. INB- Comparator B Inverting Input INB+ Comparator B Noninverting Input INC- Comparator C Inverting Input INC+ Comparator C Noninverting Input IND- Comparator D Inverting Input IND+ Comparator D Noninverting Input 9 SHDN 9 B Comparator B Output C Comparator C Output 0 D Comparator D Output Shutdown Input. The device shuts down when SHDN is high. 0 B Comparator B Complementary Output Positive Supply Input ( to must be.v), A Comparator A TTL Output, A Comparator A Complementary Output Maxim Integrated

8 Detailed Description The MAX9 MAX9/ single-supply comparators feature internal hysteresis, ultra-high-speed operation, and low power consumption. Their outputs are guaranteed to pull within 0.V of either rail without external pullup or pulldown circuitry. Beyond-the-Rails input voltage range and low-voltage, single-supply 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 MAX9 MAX9/MAX99/ MAX999 creates two trip points: one for the rising input voltage and one for the falling input voltage (Figure ). 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 MAX9/MAX9 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 ). Input Stage Circuitry The MAX9 MAX9/ 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 00Ω resistors (Figure ). The diodes limit the differential voltage applied to the comparator s internal circuitry to no more than V F, where V F is the diode s forward-voltage drop (about 0.V at + C). V TRIP+ V IN+ V HYST V TRIP+ + V V TRIP- OS = V IN- = 0V V TRIP- V OH V OL V OH V OL Figure. Input and Output Waveforms, Noninverting Input Varied Maxim Integrated

9 t SU t H DIFFERENTIAL INPUT VOLTAGE V OS t LPW LE 0V t PD t LPD V OH V OL t SKEW t SKEW Figure. MAX9/MAX9 Timing Diagram MAX9 MAX9 MAX99 MAX999 For a large differential input voltage (exceeding V F ), this protection circuitry increases the input bias current at IN+ (source) and IN- (sink). (IN+ IN ) V Input current = F 00 IN+ 00Ω TO INTERNAL CIRCUITRY Input currents with large differential input voltages should not be confused with input bias currents (I B ). As long as the differential input voltage is less than V F, this input current is less than I B. IN- 00Ω TO INTERNAL CIRCUITRY The input circuitry allows the MAX9 MAX9/MAX99/ MAX999 s input common-mode range to extend 00mV 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. Input Stage Circuitry Maxim Integrated 9

10 I SOURCE MAX9 MAX9 MAX99 MAX999, I SINK Figure. Output Stage Circuitry Figure. MAX9 PCB Layout Output Stage Circuitry The MAX9 MAX9/ contain a current-driven output stage, as shown in Figure. During an output transition, I SOURCE or I SINK 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 V OH or V OL, the source or sink current decreases to a small value, capable of maintaining the V OH or V OL 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 MAX9/MAX9/MAX9/ MAX99 shut down. When shut down, the supply current drops to 0μA per comparator, and the outputs become high impedance. SHDN has a high input impedance. Connect SHDN to for normal operation. Exit shutdown with LE low; otherwise, the output is indeterminate. Applications Information Circuit Layout and Bypassing The MAX9 MAX9/ s high bandwidth requires a high-speed layout. Follow these layout guidelines: ) Use a PCB with a good, unbroken, low-inductance ground plane. ) Place a decoupling capacitor (a 0.μF ceramic surface-mount capacitor is a good choice) as close to as possible. ) 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. ) Solder the device directly to the printed circuit board rather than using a socket. ) Refer to Figure for a recommended circuit layout. ) For slow-moving input signals, take care to prevent parasitic feedback. A small capacitor (000pF 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. Maxim Integrated 0

11 Pin Configurations TOP VIEW IN+ INA+ IN- SHDN MAX9 INA- INB+ MAX9 A B LE INB- SO/MAX SO/MAX INA- A INA- N.C. N.C. SHDN INA+ LEA LEB MAX9 0 A B IN- IN+ INA+ INB- INB+ INC- MAX9 A B MAX99 N.C. INB- INB+ 9 B SHDN INC+ IND- 0 C D SO/MAX SO IND+ SO/SOP 9 SHDN Chip Information MAX9/MAX9 TRANSISTOR COUNT: MAX9/MAX9 TRANSISTOR COUNT: 0 TRANSISTOR COUNT: Maxim Integrated

12 Package Information For the latest package outline information and land patterns (footprints), go to 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. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. LAND PATTERN NO. SOT U SO S µmax U SO S SO S SOP E Maxim Integrated

13 Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 9/9 Initial release /9 Added -pin µmax packages. Correct minor errors.,, /9 Added dual and quad MAX9/MAX9 packages.,, /9 Added new MAX99 and MAX999 parts.,, /99 New wafer fab/process change to CB0. Update specifications and TOCs.,,,, /0 Added new Current into Input Pins in the Absolute Maximum Ratings. /0 Added new MAX999AAUK part and specifications.,, 9/ Removed automotive reference from Revision History. For pricing, delivery, and ordering information, please contact Maxim Direct at --9-, or visit Maxim Integrated s website at 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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 0 Maxim Integrated Products, Inc.