general description the max328/ma329 are monolithic cmos analog multi-plexers. the max328 is a single-ended, 1-of-8 device, and the max329 is a differential, 2-of-8 device. designed to provide the lowest possible on- and off- leakages, these multiplexers switch signals from high source impedance, providing the mux operates into a high-input-impedance op amp or a/d converter. the max328/max329 are pin-for-pin replacements for the popular dg508/dg509 in these applications. adding an external 40k ? resistor to each input makes the max328/max329 an excellent fault-tolerant multi-plexer. low leakage (less than 1pa at +25?) and 2.5k ? on-resistance allow the circuit to sustain 110v ac faults indefinitely while maintaining an error of lessthan 40nv for normal signals (i.e., 1pa times 40k ? ). the max328/max329 work equally well with a singlesupply of 10v to 30v or dual supplies of ?v to ?8v. they also perform well with unbalanced combinations of supply voltage, such as +12v and -5v or +5v and -15v. low power dissipation (1.9mw with ?5v supplies) allows use in portable applications. applications control systemsdata logging systems aircraft heads-up displays data-acquisition systems signal routing features ? ultra-low off- and on-leakage: 1pa typ ? bidirectional operation (use as mux or demux) ? ttl and cmos logic compatibility ? analog-signal range includes power-supply rails ? switching speeds less than 1.5 s ? pin compatible with dg508/dg509 and max358/max359 ? latchup proof construction max328/max329 ultra-low leakage monolithic cmos analog multiplexers ___________________________________________________ _____________ maxim integrated products 1 + 1615 14 13 12 11 10 9 12 34 5 6 7 8 a0 a1a2 gnd v+ s5 s6 s7 s8 top view max328 dip/so en v- s3 s1s2 s4 d 1615 14 13 12 11 10 9 12 34 5 6 7 8 a0 a1gnd v+ s1b s2b s3b s4b db max329 dip/so en v- s3a s1as2a s4a da + pin configurations ordering information max328 v+ v- gnd a0 a1 a2 en s1s8 d op amp +15v -15v 40k ? 1/2w 40k ? 1/2w analog input analog input dm7493 +15v +15v n.c. clk in n.c. gnd v 02 v 01 ain bin q b q c q o q a v+ en in(mux on/off control) out i bias < 1pa 1-of-8 channel sequential mux with 120v ac fault capability typical operating circuit 19-1006; rev 3; 2/11 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. + denotes a lead(pb)-free/rohs-compliant package. * contact factory for dice specifications. ** ep = exposed pad. *** contact factory for availability. substrate may be allowed to be unconnected or be connected to v+. ordering information continued at end of data sheet. part temp range pin-package max328 cpe+ 0c to +70c 16 plastic dip max328cwe+ 0c to +70c 16 wide so max328cje 0c to +70c 16 cerdip max328c/d 0c to +70c dice* max328ete+ -40c to +85c 16 tqfn-ep** max328epe+ -40c to +85c 16 plastic dip max328ewe+ -40c to +85c 16 wide so max328eje -40c to +85c 16 cerdip*** max328mje -55c to +125c 16 cerdip*** pin configurations continued at end of data sheet. downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers 2 __________________________________________________ _____________________________________ absolute maximum ratings electrical characteristics (v+ = 15v, v- = -15v, v gnd = 0v, t a = +25c , unless otherwise noted.) (note 2) stresses beyond those listed under ?bsolute 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. voltage referenced to v- v+ ........................................................................................+44v gnd .....................................................................................+25v digital inputs (note 1), v s , v d ............................-2v to (v+ + 2v) current (any terminal, except s or d)................................30ma continuous current, s or d (pulsed at 1ms, 10% duty cycle max)..............................40ma operating temperature range max328/329 c _ _................................................0? to +70? max328/329 e _ _ .............................................-40? to +85? max328/329 m _ _ ..........................................-55? to +125? power dissipation (package) (note 1) cerdip (derate 10mw/? above +70?) .....................800mw pdip (derate 10.5mw/? above +70?) ....................842.1mw wide so (derate 14.3mw/? above +70?) ............1142.9mw tqfn (derate 33.3mw/? above +70?) .................2666.7mw storage temperature.........................................-65? to +150? lead temperature (soldering, 10s) .................................+300? soldering temperature (reflow) lead(pb)-free packages (pdip, tqfn, wide so) ........+260? packages containing lead(pb) (cerdip, pdip, wide so)..+240? packages containing lead(pb) (tqfn) .........................+260? max328m max329m max328c/e max329c/e parameter symbol conditions min typ max min typ max units switch analog signal range v analog -15 +15 -15 +15 v v d = 10v, i s = 100a 1.5 2.5 1.5 3.5 drain-source on-resistance r ds(on) v d = -10v, i s = 100a seq. each switch on, v al = 0.8v, v ah = 2.4v 1.0 2.5 1.0 3.5 k greatest change in drain-source on- resistance between channels r ds(on) r ds(on) = r ds(on) ma - r ds(on) min ( ) r ds(on) ave 2 2 % v s = 10v, v d = -10v 0.1 10 0.1 10 source off-leakage current (note 3) i s(off) v s = -10v, v d = 10v v en = 0v 0.3 10 0.3 10 pa v d = 10v, v s = -10v 0.3 10 0.3 10 max328 v d = -10v, v s = 10v 1.0 10 1.0 10 v d = 10v, v s = -10v 0.3 10 0.3 10 drain off- leakage current (note 3) max329 i d(off) v d = -10v, v s = 10v v en = 0v 0.5 10 0.5 10 pa v s (all) = v d = 10v 3.0 10 3.0 10 max328 v s (all) = v d = -10v 2.0 10 2.0 10 v s (all) = v d = 10v 1.5 10 1.5 10 drain on- leakage current (note 3) max329 i d(on) v s (all) = v d = -10v seq. each switch on, v al = 0.8v, v ah = 2.4v 1.0 10 1.0 10 pa note 1: all leads soldered or welded to pc board. downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers ___________________________________________________ ____________________________________ 3 electrical characteristics (continued) (v+ = 15v, v- = -15v, v gnd = 0v, t a = +25c , unless otherwise noted.) (note 2) max328m max329m max328c/e max329c/e parameter symbol conditions min typ max min typ max units input v a = 2.4v 0.001 1 0.001 1 address input current, input voltage high i ah v a = 15v 0.001 1 0.001 1 a v en = 2.4v 0.001 1 0.001 1 address input current, input voltage low i al v en = 0v all v a = 0v 0.001 1 0.001 1 a dynamic switching time of multiplexer t transition figure 1 1.0 1.5 s break-before-make interval t open figure 2 0.2 0.2 s enable turn-on time t on(en) figure 3 1.0 1.5 s enable turn-off time t off(en) figure 3 0.7 1.0 s off-isolation oirr v en = 0v, r l = 1k , c l = 15pf, v s = 7v rms , f = 500khz 84 84 db source off-capacitance c s(off) v s = 0v v en = 0v, f = 1mhz 1.8 1.8 pf max328 8.0 8.0 drain off- capacitance max329 c d(off) v d = 0v v en = 0v, f = 1mhz 4.0 4.0 pf v a = 10v 1 1 v a = 0v 2 5 2 5 charge injection (note 4) q (inj) v a = -10v 4 4 pc supply positive supply current i+ v en = 2.4v v a = 0v/5v 4.5 200 4.5 200 a negative supply current i- v en = 2.4v v a = 0v/5v 1 -100 1 -100 a power-supply range for continuous operation (note 7) v op 5 18 5 18 v downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers 4 __________________________________________________ _____________________________________ electrical characteristics (overtemperature) (v+ = 15v, v- = -15v, v gnd = 0v, t a = t min to t max , unless otherwise noted.) (note 2) max328m max329m max328c/e max329c/e parameter symbol test conditions min typ max min typ max units switch analog-signal range v analog -15 +15 -15 +15 v v d = 10v, i s = 100a 2.2 4 1.9 5 drain-source on-resistance r ds(on) v d = -10v, i s = 100a seq. each switch on, v al = 0.8v, v ah = 2.4v 1.5 4 1.2 5 k v s = 10v, v d = -10v 5 5 source off-leakage current (note 6) i s(off) v s = -10v, v d = 10v v en = 0v 5 5 na v d = 10v, v s = -10v 20 20 max328 v d = -10v, v s = 10v 20 20 v d = 10v, v s = -10v 10 10 drain off- leakage current (note 6) max329 i d(off) v d = -10v, v s = 10v v en = 0v 10 10 na v s (all) = v d = 10v 20 20 max328 v s (all) = v d = -10v 20 20 v s (all) = v d = 10v 10 10 drain on- leakage current (note 6) max329 i d(on) v s (all) = v d = -10v seq. each switch on, v al = 0.8v, v ah = 2.4v 10 10 na input v a = 2.4v 0.01 1 0.01 1 address input current, input voltage high i ah v a = 15v 0.01 1 0.01 1 a v en = 2.4v 0.01 1 0.01 1 address input current, input voltage low i al v en = 0v all v a = 0v 0.01 1 0.01 1 a note 2: typical values are for design aid only; not guaranteed or subject to production testing. note 3: all leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70?, +85?, +125?, and guaran-teed by correlation at +25?. note 4: guaranteed by design. note 5: electrical characteristics, such as on-resistance, change when power supplies other than ?5v are used. power-supplyrange is a design characteristic, not production tested. note 6: leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70?, etc. downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers _______________________________________________________________________________________ 5 typical operating characteristics (t a = +25?, unless otherwise noted.) r ds(on) vs. analog input for dual supplies max328/max329 toc01 analog input (v) r ds(on) (k ? ) 10 5 0 -5 -10 1 2 3 4 5 6 7 8 90 -15 15 5v supplies 15v supplies r ds(on) vs. analog input for single supply max328/max329 toc02 analog input (v) r ds(on) (k ? ) 10 5 1 2 3 4 50 01 5 with +15v supply i s(off) vs. temperature max328/max329 toc03 temperature ( c) leakage (na) 105 85 65 45 25 5 -15 -35 0.001 0.01 0.1 1.0 10.0 0.0001 -55 125 v+ = 15vv- = 15v max328/ max329 i d(on), i d(off) vs. temperature max328/max329 toc04 temperature ( c) leakage (na) 105 85 65 45 25 5 -15 -35 0.01 0.1 1.0 10 100 0.001 -55 125 v+ = 15vv- = 15v max328 downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers 6 __________________________________________________ _____________________________________ pin max328 max329 dip/so tqfn-ep dip/so tqfn-ep name function 1, 15, 16 15, 14, 13 a0, a2, a1 address input 1, 16 15, 14 a0, a1 address input 2 16 2 16 en enable 3 1 3 1 v- negative-supply voltage input 4C7 2C5 s1Cs4 analog inputsbidirectional 4C7 2C5 s1aCs4a analog inputsbidirectional 8 6 d analog outputsbidirectional 8, 9 6, 7 da, db analog outputsbidirectional 9C12 7C10 s8Cs5 analog inputsbidirectional 10C13 8C11 s4bCs1b analog inputsbidirectional 13 11 14 12 v+ positive-supply voltage input 14 12 15 13 gnd ground ep exposed pad. connect ep to v+. (tqfn only). pin description truth tablemax328 a2 a1 a0 en on switch x x x 0 none 0 0 0 1 1 0 0 1 1 2 0 1 0 1 3 0 1 1 1 4 1 0 0 1 5 1 0 1 1 6 1 1 0 1 7 1 1 1 1 8 truth tablemax329 a1 a0 en on switch x x 0 none 0 0 1 1 0 1 1 2 1 0 1 3 1 1 1 4 note: logic ??= v al 0.8v, logic ??= v ah 2.4v downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers ___________________________________________________ ____________________________________ 7 max328 a2 +5v s1 a1en 2.4v v out v a out s8 a0 s2?7 gnd 1k ? 50 ? 12.5pf 0v v ah = 3.0v t open 50% 50% output addressdrive (v a ) figure 2. break-before-make delay (t open ) max328 a2 s1 a1en v a out a0 s2?7 gnd 1k ? 50 ? 12.5pf +10v 50% 90% 90% t off(en) t on(en) output enable drive v ah = 3.0v 0v figure 3. enable delay (t on(en) , t off(en) ) max328 a2 10v -10v 0v +10v 50% 90% 10v s1 a1 s2 en +v ah v ah = 3.0v output a v a t a out s8 a0 s2?7 gnd 10m ? 50 ? probe 14pf addressdrive (v a ) figure 1. access time vs. logic level (high) downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers 8 __________________________________________________ _____________________________________ applications information figure 4 is a typical circuit for converting themax328/max329 into a fault-tolerant mux. in this application, the internal diodes limit the voltage at the max328 input to ?5.7v (?5v supplies). no external diodes need to be added with the max328/max329, unlike conventional multiplexers requiring external diodes. the resistors, r, need to be 39k ? or higher to limit the power dissipation in the resistor when a 120v ac faultoccurs (i.e., power dissipation is (120-16) 2 /39k ? or 0.28w. this is why a 1/2/w resistor is needed). the circuitwithstands an indefinite fault to a 120v ac line with no damage to any component. in addition to allowing fault-protection, the guaranteed low leakage of the max328/max329 also reduces signal errors. the circuit in figure 4 produces an error voltage of 10pa (max leakage) x 39k ? or 0.39? at room tempera- ture and 39? at +125?. therefore, for 10v signals, themax328/max329 allows 17-bit resolution (38? = 1lsb) over the full temperature range. 1615 14 13 12 11 10 9 12 34 5 6 7 8 a0 a1a2 max328 en d s4 s3 s2 s1 1 f -15v rr r r rr r r s5s6 s7 s8 1 f +15v r = 39k ? 1/2w figure 4. fault-tolerant mux (indefinitely withstands 120v ac fault voltages) 16 en 15 a0 14 a1 13 a2 10 s5 11 v+ 12 gnd 9s6 2 s1 1 v- 3 s2 4 s3 5 s4 6 d 7 s8 8 s7 max328 logic 16 en 15 a0 14 a1 13 gnd 10 s2b 11 s1b 12 v+ 9 s3b 2 s1a 1 v- 3 s2a 4 s3a 5 s4a 6 da 7 db 8 s4b max329 logic top view functional diagrams downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers ___________________________________________________ ____________________________________ 9 ordering information (continued) + denotes a lead(pb)-free/rohs-compliant package. * contact factory for dice specifications. ** ep = exposed pad. *** contact factory for availability. substrate may be allowed to be unconnected or be connected to v+. part temp range pin-package max329 cpe+ 0c to +70c 16 plastic dip max329cwe+ 0c to +70c 16 wide so max329cje 0c to +70c 16 cerdip max329c/d 0c to +70c dice* max329ete+ -40c to +85c 16 tqfn-ep** max329epe+ -40c to +85c 16 plastic dip max329ewe+ -40c to +85c 16 wide so max329eje -40c to +85c 16 cerdip*** max329mje -55c to +125c 16 cerdip*** 16 en 15 a0 14 a1 13 a2 10 s5 11 v+ 12 gnd 9s6 2 s1 1 v- 3 s2 4 s3 5s4 + 6 d 7 s8 8s7 max328 top view tqfn 16 en 15 a0 14 a1 13 gnd 10 s2b 11 s1b 12 v+ 9 s3b 2 s1a 1 v- 3 s2a 4 s3a 5s4a + 6 da 7 db 8 s4b max329 top view tqfn pin configurations (continued) package information for the latest package outline information and land patterns(footprints), go to www.maxim-ic.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. package type package code outline no. land pattern no. 16 cerdip j16+3 21-0045 16 pdip p16+2 21-0043 16 tqfn-ep t1655+3 21-0140 90-0073 16 wide so w16+2 21-0042 90-0107 downloaded from: http:///
max328/max329 ultra-low leakage monolithic cmos analog multiplexers 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. 10 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 3 2/11 updated the ordering informaion table to reflect lead-free parts and corrected part numbers and package types 1, 9 downloaded from: http:///
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