High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches

Transcription

1 9-; Rev ; / High-Speed, Low-oltage, Ω, Dual SPST General Description The MAX//MAX are monolithic, dual, single-pole/single-throw (SPST) switches that can operate from a single supply ranging from +. to +.. The MAX//MAX provide low Ω on-resistance (R ),.Ω R matching between channels, and Ω R flatness over the entire analog signal range. These devices offer fast switching times of less than while couming less than.µw of quiescent power. The MAX has two normally open (NO) switches, and the has two normally closed (NC) switches. The MAX has one NO switch and one NC switch. All three devices have low.na leakage currents over the entire temperature range. The MAX/ /MAX are available in small -pin µmax and -pin QFN packages. Applicatio Battery-Operated Equipment Audio and ideo Signal Routing Low-oltage Data-Acquisition Systems Sample-and-Hold Circuits Communicatio Circuits Rail-to-Rail is a trademark of Nippon Motorola, Ltd. Features +. to +. Single-Supply Operation Rail-to-Rail Analog Signal Range Guaranteed R Ω max (+ supply) Ω max (+ supply) +. Operation R Ω typ Over Temperature t typ, t typ Guaranteed R Flatness: Ω (+ supply) Guaranteed R Match Between Channels.Ω (+ supply) Low Leakage (<.na) Over Entire Temperature Range Excellent AC Characteristics Low Crosstalk: -9dB at MHz High Off-Isolation: -db at MHz.% Total Harmonic Distortion Low Power Coumption: <.µw PART MAXEUA MAXEGA EUA EGA MAXEUA MAXEGA Ordering Information TEMP RANGE - C to + C - C to + C - C to + C - C to + C - C to + C - C to + C PIN-PACKAGE µmax QFN x µmax QFN x µmax QFN x MAX//MAX Pin Configuratio/Functional Diagrams/Truth Tables TOP IEW MAX MAX NO NC NO COM IN COM IN COM IN IN COM IN COM IN COM NO NC NC µmax MAX µmax µmax MAX NO NC Pin Configuratio continued at end of data sheet. Maxim Integrated Products For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at --9-, or visit Maxim s website at

2 High-Speed, Low-oltage, Ω, Dual SPST MAX//MAX ABSOLUTE MAXIMUM RATINGS (All oltages Referenced to )...-. to +, COM_,, (Note )...-. to ( +.) Continuous Current (any terminal)...±ma Continuous Current (,, COM_)...±mA Peak Current (,, COM_, pulsed at ms, % duty cycle)... ±ma 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 conditio beyond those indicated in the operational sectio of the specificatio is not implied. Exposure to absolute maximum rating conditio for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Single + Supply Continuous Power Dissipation (T A = + C) -Pin µmax (derate.mw/ C above + C)... mw -Pin QFN (derate.mw/ C above + C)... 9mW Operating Temperature Range...- C to + C Junction Temperature...+ C Storage Temperature Range...- C to + C Lead Temperature (soldering, s)... + C Note : Signals on,, COM_, or exceeding or are clamped by internal diodes. Limit forward-diode current to maximum current rating. ( = +. to +., INH =., INL =.,, unless otherwise noted. Typical values are at T A = + C.) PARAMETER ANALOG SWITCH Analog Signal Range On-Resistance SYMBOL,, R =., I COM_ = ma, or = to CDITIS T A = + C MIN TYP MAX. On-Resistance Match =., I COM_ = T A = + C.. Between Channels R ma, or (Notes, ) = to. UNITS Ω Ω On-Resistance Flatness (Note ) R FLAT =., I COM_ = ma, or = to T A = + C.. Ω, Off-Leakage Current (Note ) I (), I () =., = T A = + C -... or., or =. or -.. na COM_ Off-Leakage Current (Note ) I COM_() =., = T A = + C -... or., or =. or -.. na COM_ On-Leakage Current (Notes, ) DIGITAL INPUTS Input Logic High Input Logic Low Input Current I COM_() IH IL I IN =., = or. =. or. T A = + C na µa

3 High-Speed, Low-oltage, Ω, Dual SPST ELECTRICAL CHARACTERISTICS Single + Supply (continued) ( = +. to +., INH =., INL =.,, unless otherwise noted. Typical values are at T A = + C.) PARAMETER SYMBOL CDITIS MIN TYP MAX UNITS DYNAMIC R L = Ω, C L = T A = + C 9 Turn-On Time (Note ) t pf, = =, Figure R L = Ω, C L = T A = + C Turn-Off Time (Note ) t pf, = =, Figure Break-Before-Make (Note ) (MAX only) Charge Injection Q GEN =, R GEN =, C L = nf, Figure pc, Off-Capacitance C (), C () or =, f = MHz, Figure pf COM_ Off-Capacitance C COM_ () f = MHz, Figure pf Switch On-Capacitance C () f = MHz, Figure pf Off-Isolation (Note ) ISO C L = pf, R L = Ω, f = MHz - Figure f = MHz - db Crosstalk (Note ) CT C L = pf, R L = Ω, f = MHz - Figure f = MHz -9 db Total Harmonic Distortion THD R L = Ω,.p-p, f = Hz to khz. % SUPPLY Positive Supply Current R L = Ω, T A = + C t BBM C L = pf, = =, Figure I+ =., = or.. µa MAX//MAX ELECTRICAL CHARACTERISTICS Single + Supply ( = +. to +., INH =., INL =.,, unless otherwise noted. Typical values are at T A = + C.) PARAMETER ANALOG SWITCH Analog Signal Range SYMBOL,, CDITIS MIN TYP MAX UNITS On-Resistance R =., I COM_ = ma, or = to T A = + C 9 Ω On-Resistance Match =., I COM_ = T A = + C.. Between Channels R ma, or (Notes, ) = to. Ω On-Resistance Flatness (Note ) R FLAT =., I COM_ = ma, or T A = + C.. = to.

4 High-Speed, Low-oltage, Ω, Dual SPST MAX//MAX ELECTRICAL CHARACTERISTICS Single + Supply (continued) ( = +. to +., INH =., INL =.,, unless otherwise noted. Typical values are at T A = + C.) PARAMETER DIGITAL INPUTS Input Logic High Input Logic Low Input Current DYNAMIC Turn-On Time (Note ) Turn-Off Time (Note ) Break-Before-Make (Note ) (MAX only) Charge Injection, Off-Capacitance COM_ Off-Capacitance Switch On-Capacitance Off-Isolation (Note ) Crosstalk (Note ) SUPPLY Positive Supply Current SYMBOL IH IL I IN t t t BBM Q C (), C () C COM_() C () ISO CT I+ =. or. R L = Ω, C L = pf, = =, Figure R L = Ω, C L = pf, = =, Figure R L = Ω, C L = pf, = =, Figure GEN =, R GEN =, C L = nf, Figure or =, f = MHz, Figure f =MHz, Figure f =MHz, Figure C L = pf, R L = Ω, Figure C L = pf, R L = Ω, Figure CDITIS T A = + C T A = + C T A = + C f = MHz f = MHz f = MHz f = MHz MIN TYP MAX UNITS =., = or.. µa µa pc pf pf pf db db Note : R = R (MAX) - R (MIN). Note : R Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note : Guaranteed by design. Note : On-Leakage performed with voltage applied to COM_, with and left floating. Note : Off-Isolation = log ( O_ / I_ ), where O is and I is or from the network analyzer. Note : Crosstalk is measured between the two switches. Note : R and R matching specificatio for QFN-packaged parts are guaranteed by design.

5 High-Speed, Low-oltage, Ω, Dual SPST ( = + or +, INH =, INL =, T A = + C, unless otherwise noted.) R (Ω) CHARGE INJECTI (pc) I COM = ma = -RESISTANCE vs. COM =. =. =. COM () CHARGE INJECTI vs. COM COM () = MAX//toc TOC//toc R (Ω) SUPPLY CURRENT (na) -RESISTANCE vs. TEMPERATURE I COM = ma = = - - TEMPERATURE ( C) SUPPLY CURRENT vs. SUPPLY OLTAGE IN =..... SUPPLY OLTAGE () Typical Operating Characteristics IN = MAX//toc MAX//toc LEAKAGE (pa) LOGIC THRESHOLD ().... -/-LEAKAGE CURRENT vs. TEMPERATURE IN = - - TEMPERATURE ( C) LOGIC THRESHOLD vs. SUPPLY OLTAGE IN = SUPPLY OLTAGE () MAX//toc MAX//toc MAX//MAX SWITCHING TIMES vs. SUPPLY OLTAGE TOC//toc SWITCHING TIMES vs. TEMPERATURE TOC//toc IN = SUPPLY CURRENT vs. TEMPERATURE TOC//toc9 SWITCHING TIMES () 9 SWITCHING TIMES () SUPPLY CURRENT (na) = = =. SUPPLY OLTAGE () - - TEMPERATURE ( C) - - TEMPERATURE ( C)

6 High-Speed, Low-oltage, Ω, Dual SPST MAX//MAX ( = + or +, INH =, INL =, T A = + C, unless otherwise noted.) (db/div) = FREQUENCY RESPSE -LOSS -ISOLATI -.. FREQUENCY (MHz) PIN MAX//toc CROSSTALK (db) Typical Operating Characteristics (continued) NAME CROSSTALK vs. FREQUENCY FREQUENCY (MHz) MAX//toc THD (%)..... FUNCTI TOTAL HARMIC DISTORTI vs. FREQUENCY =.. FREQUENCY (khz) Pin Description MAX//toc MAX MAX, NO, NO Analog Switch Normally Open Terminals, NC, NC Analog Switch Normally Closed Terminals NO Analog Switch Normally Open Terminal NC Analog Switch Normally Closed Terminal,,, COM, COM Analog Switch Common Terminals,,, IN, IN Logic-Controlled Inputs Ground Positive Supply Input. Bypass with a.µf capacitor to. Note:,, and COM_ pi are identical and interchangeable. Signals can be passed through either side of these bidirectional switches. However, the typical off-capacitances differ, as shown in the Electrical Characteristics.

7 High-Speed, Low-oltage, Ω, Dual SPST Pin Configuratio/Functional Diagrams/Truth Tables (continued) TOP IEW NO COM IN, MAX QFN MAX Applicatio Information COM COM Figure. Overvoltage Protection Using External Blocking Diodes IN NO NC COM IN QFN IN COM NC NO COM IN MAX QFN MAX NO COM NC exceeds or (Figure ). irtually all of the analog leakage current comes from the ESD diodes to or. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced, they are reverse biased differently. Each is biased by either or and the analog signal. This mea their leakages will vary as the signal varies. The difference in the two diode leakages to the and pi cotitutes the analog-signal-path leakage current. All analog leakage current flows between each pin and one of the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity. There is no normal current path between the analogsignal paths and or. and also power the internal logic and logic-level tralators. The logiclevel tralators convert the logic level into switched and signals to drive the analog signal gates. IN NC MAX//MAX The MAX//MAX operate from a single supply ranging from +. to +.. The devices are guaranteed to be functional over that supply range, but TTL/CMOS compatibility is only valid for operation using a + supply. All voltage levels are referenced to. Positive and negative DC analog inputs or AC signals can be accommodated by shifting and. ESD-protection diodes are internally connected between each analog-signal pin and both and. One of these diodes conducts if any analog signal

8 High-Speed, Low-oltage, Ω, Dual SPST MAX//MAX OPEN OPEN Ω Ω MAX COM_ COM_ Ω Ω pf pf IH +. % % IH +. t 9% t % % t 9% t t R < t F < 9% 9% S MAX S IH +. Ω COM_ Ω pf S 9% 9% t BBM t BBM t BBM = t () - t () OR t BBM = t () - t () Figure. Switching Times

9 High-Speed, Low-oltage, Ω, Dual SPST Figure. Off-Isolation, On-Loss, and Crosstalk IN Ω MAX MAX OR MAX MAX COM_ MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. -ISOLATI IS MEASURED BETWEEN COM AND TERMINAL EACH SWITCH. -LOSS IS MEASURED BETWEEN COM AND TERMINAL EACH SWITCH. SIGNAL DIRECTI THROUGH SWITCH IS REERSED; WORST ALUES ARE RECORDED. OR COM_.µF OR = OUT C L pf * IN OUT NETWORK ANALYZER Ω Ω MEAS Ω Ω -ISOLATI = log OUT IN -LOSS = log OUT IN REF * ADD Ω TERMINATI FOR -ISOLATI AS REQUIRED MAX MAX OR COM_ MHz CAPACITANCE ANALYZER MAX//MAX IN MAX Figure.,, and COM_ Capacitance OUT OUT OUT IS THE MEASURED OLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS. Q = OUT x C L TRANSISTOR COUNT: Chip Information Figure. Charge Injection 9

10 High-Speed, Low-oltage, Ω, Dual SPST MAX//MAX Package Information LUMAXD.EPS Maxim cannot assume respoibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licees are implied. Maxim reserves the right to change the circuitry and specificatio without notice at any time. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA 9 -- Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.