View HEDS-5600-F13_6161227.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

functional diagram 19-5929; rev 1; 6/12 ordering information appears at end of data sheet. for related parts and recommended products to use with this part, refer to www.maximintegrated.com/max14778.related . general description the max14778 dual 4:1 analog multiplexer supports analog signals up to q 25v with a single 3.0 to 5.5v supply. each multiplexer has separate control inputs to allow independent switching, making the device ideal for multiplexing different communications signals with the same connector pins. extended esd protection of q 6kv (human body model) enable direct interfacing to cables and connectors. the max14778 features a low 1.5 i (max) on-resistance and 3m i (typ) flatness to maximize signal integrity over the entire common-mode voltage range. each multiplex - er can carry up to 300ma of continuous current through the multiplexer in either direction. the max14778 supports switching of full-speed usb 1.1 signals (12mbps) and rs-485 data rates of up to 20mbps. the max14778 is available in a 20-pin (5mm x 5mm) tqfn package and is specified over the -40 n c to +85 n c extended temperature range. applications rs-485/rs-232/usb 1.1 multiplexing pos peripherals handheld industrial devices communication systems audio/data multiplexing connector sharing gaming machines features s 25v signal range s single 3.0v to 5.5v supply s two independent multiplexers s 1.5 i r on (max) s 3m i r on flatness (typ) s 300ma maximum current through multiplexer s 78pf input capacitance s 75mhz large-signal bandwidth s break-before-make operation s extended esd protection on a_ and b_ pins ? q 6kv human body model (hbm) control a bias generation sa0 ena a0 a1 a2 a3 sa1 v dd v p v n acom control b sb0 enb sb1 gnd b0 b1 b2 b3 bcom max14778 max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer evaluation kit available for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.
2 (all voltages referenced to gnd.) v dd .......................................................................... -0.3v to +6v v p ........................... -0.3v to the lesser of +52v and (v n + 70v) v n ................ the lesser of (v dd - 40v) and (v p - 70v) to +0.3v v p to v n ................................................................. -0.3v to +70v ena, enb, sa_, sb_ ................................ -0.3v to (v dd + 0.3v) a_, acom, b_, bcom .. (v n - 0.3v) to the lesser of (v p + 0.3v) and (v n + 52v) continuous current through switch ............................. 500ma continuous power dissipation (t a = +70 n c) tqfn (derate 33.3mw/ n c above +70 n c) ............... 2666.7mw operating temperature range .......................... -40 n c to +85 n c junction temperature ..................................................... +150 n c storage temperature range ............................ -65 n c to +150 n c lead temperature (soldering, 10s) ............................... +300 n c soldering temperature (reflow) ...................................... +260 n c tqfn junction-to-ambient thermal resistance ( b ja ) .......... 30 n c/w junction-to-case thermal resistance ( b jc ) ................. 2 n c/w absolute maximum ratings note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional opera - tion 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. package thermal characteristics (note 1) electrical characteristics (v dd = 3.0v to 5.5v, t a = -40 n c to +85 n c, unless otherwise noted. typical values are at v dd = 5v, t a = +25 n c.) (note 2) parameter symbol conditions min typ max units dc characteristics supply voltage range v dd 3.0 5.5 v supply current i dd ena = enb = high v dd p v ddth 4.27 10 ma v dd > v ddth 2.54 6 v ena = v enb = v dd /2 v dd p v ddth 4.31 10 v dd > v ddth 2.59 6 charge-pump threshold v ddth (note 3) 4.64 v analog signal range v in figure 1, switch open or closed -25 +25 v continuous current through switch i com -300 +300 ma on-resistance r on figure 1, i com = q 300ma, v in = q 25v 0.84 1.5 ? on-resistance flatness r flat(on) figure 1, -25v p v in p +25v, i com = q 300ma 3 m? a_, b_ off-leakage current i a(off) , i b(off) figure 2, v in = 25v, v out = 0v -200 +200 na acom, bcom off-leakage current i acom(off) , i bcom(off) figure 2, v out = 15v, v in = 0v -1 +1 f a a_, b_ on-leakage current i a(on) , i b(on) figure 2, v in = q 25v, acom or bcom is unconnected -1 +1 f a max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
3 note 2: all units are production tested at t a = +25 n c. specifications over temperature are guaranteed by design. note 3: when v dd is higher than the charge-pump threshold, the internal 5v regulated charge pump is turned off and the input to the high-voltage charge pumps is provided by v dd . note 4: the max14778 requires a 100nf capacitor on both v p and v n to gnd to guarantee full esd protection. see the applications information section for details on esd test conditions. electrical characteristics (continued) (v dd = 3.0v to 5.5v, t a = -40 n c to +85 n c, unless otherwise noted. typical values are at v dd = 5v, t a = +25 n c.) (note 2) parameter symbol conditions min typ max units logic inputs (ena, enb, sa_, sb_) input logic-low voltage v il v dd = 5.5v 0.8 v v dd = 4.5v 0.8 v dd = 3.6v 0.7 v dd = 3.0v 0.7 input logic-high voltage v ih v dd = 5.5v 2.1 v v dd = 4.5v 2.0 v dd = 3.6v 1.9 v dd = 3.0v 1.7 ac characteristics power-up time t por 404 ms enable turn-on time t on figure 3, v in = q 10v, r l = 10k i , c l = 15pf 2 ms enable turn-off time t off figure 3, v in = q 10v, r l = 10k i , c l = 15pf 1.5 ms break-before-make interval t bbm figure 4, v in = q 10v, r l = 10k i , c l = 15pf 840 f s charge injection q figure 5, v a_ = 0v, c l = 1nf 1720 pc off-isolation v iso figure 6, v a_ = 1v rms , f = 100khz, r l = 50 i , c l = 15pf -80 db crosstalk v ct figure 6, f = 100khz, r s = r l = 50 i -103 db -3db bandwidth bw figure 6, r s = 50 i , r l = 50 i 75 mhz total harmonic distortion plus noise thd+n r s = r l = 1k i , f = 20hz to 20khz 0.003 % input capacitance c in a_, b_ pins 78 pf thermal protection thermal-shutdown threshold t shut 145 n c thermal-shutdown hysteresis t hyst 25 n c esd protection a_, b_ pins (note 4) human body model q 6 kv all other pins human body model q 2 kv max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
4 test circuits/timing diagrams figure 1. on-resistance measurement figure 2. leakage current measurement a_ b_ acom bcom i com v dd gnd max14778 +5v 1f v v in v in a_ b_ i a(off) i b(off) acom bcom v dd gnd max14778 +5v 1f a i acom(off) i bcom(off) a v out v in a_ b_ i a(on) i b(on) acom bcom v dd gnd max14778 +5v 1f a max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
5 test circuits/timing diagrams (continued) figure 3. turn-on/turn-off timing figure 4. break-before-make timing t r < 20ns t f < 20ns 50% v il logic input r l ena enb v in v ih t off 0v a_ b_ acom bcom 0.9 x v 0ut 0.1 x v out t on v out switch output logic input c l v out max14778 v out = v in r l + r on ( r l ) c l includes fixture and stray capacitance. r l c l v out acom sa1 sa0 ena v dd a_ gnd max14778 v out = v in r l + r on ( r l ) c l includes fixture and stray capacitance. logic input v in +5v 1f t r < 20ns 0v +5v 0v v out logic input switch output t bbm 80% max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
6 test circuits/timing diagrams (continued) figure 5. charge injection figure 6. off-isolation, -3db bandwidth, and crosstalk c l = 1 n f v out acom bcom ena enb a_ b_ v dd gnd logic input +5v max14778 0v v out +5v on off off dv out q = c l x dv out logi c inpu t measurements are standardized against shorts at ic terminals. off-isolation is measured between acom and "off" a_ terminal on each multiplexer. -3dbw is measured between acom and "on" a_ terminal on each multiplexer. crosstalk is measured from one channel to all other channels . signal direction through multiplexer is reversed; worst values are recorded. v dd v out ena sa_ a0 acom v in off-isolation = 20log v out v in on-loss = 20log v out v in crosstalk = 20log v out v in network analyzer 50 i 50 i 50 i 50 i meas ref 0v or v dd 50i max14778 max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
7 typical operating characteristics (v dd = 5.0v, t a = +25c, unless otherwise noted.) on-resistance vs. common-mode voltage max14778 toc01 v acom (v) on-resistance (i) 15 5 -5 -15 0.96 0.97 0.98 0.99 1.00 0.95 -25 25 i acom = 300ma v dd = 3.3v v dd = 5v on-resistance vs. common-mode voltage max14778 toc02 v acom (v) on-resistance (i) 15 5 -5 -15 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 0.5 -25 25 t a = +85c t a = +25c t a = -40c i acom = 300ma off-leakage current vs. temperature max14778 toc03 t a (c) off-leakage current (na) 60 35 10 -15 1 10 100 0.1 -40 85 v a1 = 25v a0 selected acom = gnd on-leakage current vs. temperature max14778 toc04 t a (c) on-leakage current (na) 60 35 10 -15 10 100 1000 1 -40 85 v a0 = 25v a0 selected acom unconnected charge injection vs. analog signal voltage max14778 toc05 v acom (v) q (pc) 15 5 -5 -15 200 400 600 800 1,000 1,200 0 -25 25 c l = 1nf supply current vs. temperature max14778 toc06 t a (c) i dd (ma) 60 35 -15 10 0.5 1.0 1.5 2.0 3.0 2.5 3.5 4.0 0 -40 85 v dd = 3.3v v dd = 5v crosstalk vs. frequency max14778 toc07 frequency (mhz) crosstalk (db) 10 1 -100 -80 -60 -40 -20 0 -120 0.1 100 a0 to b0 a0 and b0 selected off-isolation vs. frequency max14778 toc08 frequency (mhz) off-isolation (db) 10 1 -60 -50 -40 -30 -20 -10 0 -70 0.1 100 a0 to acom a2 selected frequency response max14778 toc09 frequency (mhz) v out /v in (db) 10 1 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 -10 0.1 100 a0 to acom a0 selected max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
8 typical operating characteristics (continued) (v dd = 5.0v, t a = +25c, unless otherwise noted.) thd+n vs. frequency max14778 toc10 frequency (khz) thd+n (%) 2 0.2 0.001 0.01 0.1 1 0.0001 0.02 20 a0 to acom r s = 600i r l = 1ki psrr vs. frequency max14778 toc11 frequency (khz) psrr (db) 10 1 0.1 -120 -100 -80 -60 -40 -20 0 -140 0.01 100 v dd to acom turn-off time vs. analog-signal voltage max14778 toc13 v acom (v) t off (ms) 15 5 -5 -15 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0 -25 25 charge pump noise with switch disabled max14778 toc15 freq (mhz) mag (db) 90 80 70 60 50 40 30 -120 -100 -80 -60 -40 -20 0 -140 20 100 measured at bcom enb = gnd rbw = 5100hz turn-on time vs. analog-signal voltage max14778 toc12 v acom (v) t on (ms) 15 5 -5 -15 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 1.00 -25 25 charge pump noise with switch enabled max14778 toc14 freq (mhz) mag (db) 90 80 70 60 50 40 30 -120 -100 -80 -60 -40 -20 0 -140 20 100 measured at bcom enb = vdd bs0 = bs1 = vdd b2 is connected to gnd with a 50i resistor rbw = 5100hz max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
9 pin description pin configuration pin name function 1 bcom mux b common terminal 2 v p positive charge-pump output. bypass v p to gnd with a 100nf 50v ceramic capacitor. 3 gnd ground 4 v n negative charge-pump output. bypass v n to gnd with a 100nf 50v ceramic capacitor. 5 acom mux a common terminal 6 a0 mux a bidirectional analog input/output 0 7 a1 mux a bidirectional analog input/output 1 8 a2 mux a bidirectional analog input/output 2 9 a3 mux a bidirectional analog input/output 3 10 ena mux a enable input 11 sa0 mux a channel select input 0 12 sa1 mux a channel select input 1 13 v dd power-supply input. bypass v dd to gnd with a 1 f f ceramic capacitor. 14 sb1 mux b channel select input 1 15 sb0 mux b channel select input 0 16 enb mux b enable input 17 b3 mux b bidirectional analog input/output 3 18 b2 mux b bidirectional analog input/output 2 19 b1 mux b bidirectional analog input/output 1 20 b0 mux b bidirectional analog input/output 0 ep exposed pad. connect ep to v n . ep is not intended as an electrical connection point. max14778 tqfn 5mm x 5mm top view 19 20 *ep + 18 17 7 6 8 v p v n acom 9 bcom sb1 sa1 sa0 sb0 12 b2 45 15 14 12 11 b1 b0 *connect exposed pad to v n . a3 a2 a1 a0 gnd v dd 3 13 b3 16 10 ena enb max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
10 truth tables table 1. mux a channel selection table 2. mux b channel selection x = dont care x = dont care detailed description the max14778 dual 4:1 analog multiplexer integrates bias circuitry to provide a q 25v analog voltage range with a single 3.0 to 5.5v supply. this extended input range allows multiplexing different communications signals such as rs-232, rs-485, audio and usb 1.1 onto the same connector. integrated bias generation the max14778 contains a total of three charge pumps to generate bias voltages for the internal switches: a 5v regu - lated charge pump, a positive high-voltage (+35v) charge pump, and a negative high-voltage (-27v) charge pump. when v dd is above 4.7v (typ), the 5v regulated charge pump is bypassed and v dd provides the input for the high- voltage charge pumps, reducing overall supply current. an external 100nf capacitor is required for each high- voltage charge pump between v p /v n and gnd. analog signal levels the max14778 transmits signals of up to q 25v with a single 3.0 to 5.5v supply due to integrated bias circuitry. the device features 1.5? (max) on-resistance and 3m i (typ) flatness for analog signals between -25v and +25v (see the typical operating characteristics ). the current flow through the multiplexers can be bidirectional, allow - ing operation either as a multiplexer or demultiplexer. digital interface the max14778 has two digital select inputs for each mux: sa1 and sa0 control mux a; sb1 and sb0 control mux b. drive the digital select inputs high or low to select which input (a_, b_) is connected to the common termi - nal (acom, bcom) for each mux. see the truth tables for more information. each mux features an independent enable input (ena and enb). drive ena or enb low to disconnect all inputs from the common terminal for that mux, regardless of the status of the select inputs or the other enable input. applications information connector sharing the max14778 supports a q 25v analog signal range independently for each input/output, allowing physical connector sharing between interface types that have differing signal ranges. the multiprotocol connector-sharing application in the typical operating circuits shows an application with rs-232, half-duplex rs-485, full-speed usb 1.1, and audio signals sharing the same connector. the device allows signals to pass over the entire signal range speci - fied by each standard while safely isolating the unused transceivers. ena sa1 sa0 acom connected to 0 x x open 1 0 0 a0 1 0 1 a1 1 1 0 a2 1 1 1 a3 enb sb1 sb0 bcom connected to 0 x x open 1 0 0 b0 1 0 1 b1 1 1 0 b2 1 1 1 b3 max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
11 non-powered condition the max14778 can tolerate input voltages on the a_, b_, acom, and bcom pins in the 25v range when it is not powered. when vdd = 0v, the dc input leakage current into the a_, b_, acom or bcom pins will typically be below 1a. some devices can have a larger leakage current up to ma range due to technology spread. with vdd not powered, internal diodes between the ana - log pins and the vp and vn will charge up the external capacitors on vp and vn when positive and/or negative voltages are applied to these pins. this causes transient input current flow. large dv/dt on the inputs causes large capacitive charg - ing currents, which have to be limited to the 300ma absolute maximum ratings in order to not destroy the internal diodes. with 100nf capacitors on vp and vn, the dv/dt must be limited to 3v/s once the capacitors reach their final voltage; the input current decays to the leakage current levels mentioned above. high-esd protection electrostatic discharge (esd)-protection structures are incorporated on all pins to protect against electrostatic discharges up to q 2kv human body model (hbm) encountered during handling and assembly. a_ and b_ are further protected against esd up to q 6kv (hbm) without damage. the esd structures withstand high esd both in normal operation and when the device is powered down. after an esd event, the max14778 continues to function without latchup. esd test conditions esd performance depends on a variety of conditions. contact maxim for a reliability report that documents test setup, test methodology, and test results. the max14778 requires a 100nf capacitor on both v p and v n to gnd to guarantee full esd protection. human body model figure 7 shows the human body model. figure 8 shows the current waveform it generates when discharged into a low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest that is then discharged into the device through a 1.5k i resistor. figure 7. human body esd test model figure 8. human body current waveform charge current - limit resistor discharge resistance storage capacitor c s 100pf r c 1m i r d 1.5k i high- voltage dc source device under test 36.8% t rl time t dl current waveform peak-to-peak ringing (not drawn to scale) i r 10% 0 0 amperes i p 100% 90% max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
12 typical operating circuits control control inputs sa1 ena sa0 sb1 sb0 enb rs-232 transceiver rs-485 transceiver usb 1.1 transceiver audio source mul tiprotocol connector sharing applica tion a0 tx rx a b d+ d- l r b0 acom v n v p +5v v dd 1f 100nf bcom a1 b1 a2 b2 a3 b3 max14778 gnd 100nf shared connector +5v max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
13 typical operating circuits (continued) control control inputs sa1 ena sa0 sb1 sb0 enb rs-232 transceiver rs-485 transceiver usb 1.1 transceiver keyboard wedge scanner connector sharing applica tion a0 tx rx a b d+ d- clock data b0 acom v n v p +5v v dd 1f 100nf bcom a1 b1 a2 b2 a3 b3 max14778 gnd 100nf shared connector +5v max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
14 ordering information + denotes a lead(pb)-free/rohs-compliant package. * ep = exposed pad. chip information process: bicmos package information for the latest package outline information and land patterns (foot - prints), go to www.maximintegrated.com/packages . 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. part temp range pin-package max14778etp+ -40 n c to +85 n c 20 tqfn-ep* package type package code outline no. land pattern no. 20 tqfn-ep t2055+4 21-0140 90-0009 max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer maxim integrated
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 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 15 ? 2012 maxim integrated products, inc. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. revision history revision number revision date description pages changed 0 6/11 initial release 1 6/12 added new tocs 14 and 15, updated non-powered condition section, updated note 4, pin description , esd test conditions , typical operating circuits , updated capacitor values 3, 8, 9, 10, 11, 12, 13 max14778 dual 25v above- and below-the-rails 4:1 analog multiplexer

▲Up To Search▲

Price & Availability of HEDS-5600-F13

	To Download HEDS-5600-F13 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .