DG444/dg445 improved, quad, spst analog switches ________________________________________________________________ maxim integrated products 1 call toll free 1-800-998-8800 for free samples or literature. _______________general description maxim? redesigned DG444/dg445 analog switches now feature on-resistance matching (4 max) between switches and guaranteed on-resistance flatness over the signal range (9 max). these low on-resistance switches conduct equally well in either direction. they guarantee low charge injection (10pc max), low power consumption (35? max), and an esd tolerance of 2000v minimum per method 3015.7. the new design offers lower off leakage current over temperature (less than 5na at +85?). the DG444/dg445 are quad, single-pole/single-throw (spst) analog switches. the DG444 has 4 normally closed switches and the dg445 has 4 normally open switches. switching times are less than 250ns for t on and less than 70ns for t off . operation is from a single +10v to +30v supply, or bipolar ?.5v to ?0v sup- plies. maxim? improved DG444/dg445 continue to be fabricated with a 44v silicon-gate process. ________________________applications sample-and-hold circuits communication systems test equipment battery-operated systems heads-up displays pbx, pabx guidance and control systems audio signal routing military radios modems/faxes ______________________new features ? plug-in upgrades for industry-standard DG444/dg445 ? improved r on match between channels (4 max) ? guaranteed r flat(on) over signal range (9 max) ? improved charge injection (10pc max) ? improved off leakage current over temperature (<5na at +85?) ? withstand electrostatic discharge (2000v min) per method 3015.7 __________________existing features ? low r ds(on) (85 max) ? single-supply operation +10v to +30v bipolar-supply operation ?.5v to ?0v ? low power consumption (35? max) ? rail-to-rail signal handling ? ttl/cmos-logic compatible ______________ordering information ordering information continued at end of data sheet. * contact factory for dice specifications. part temp. range pin-package DG444 cj 0? to +70? 16 plastic dip DG444dy 0? to +70? 16 narrow so DG444c/d 0? to +70? dice* DG444dj -40? to +85? 16 plastic dip DG444dy -40? to +85? 16 narrow so 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 in2 d2 s2 v+ v- s1 d1 in1 dg445 v l s3 d3 in3 in4 d4 s4 gnd dip/so dip/so dg445 logic switch 0 1 off on switches shown for logic "0" input DG444 logic switch 0 1 on off 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 in2 d2 s2 v+ v- s1 d1 in1 DG444 v l s3 d3 in3 in4 d4 s4 gnd top view _____________________pin configurations/functional diagrams/truth tables 19-4705; rev 1; 4/94
DG444/dg445 improved, quad, spst analog switches 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics?ual supplies (v+ = 15v, v- = -15v, v l = 5v, gnd = 0v, v inh = 2.4v, v inl = 0.8v, t a = t min to t max , unless otherwise noted.) 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. parameter symbol units r flat(on) 15 9 d r ds(on) 4 100 -0.50 0.01 0.50 source leakage current (note 5) i s(off) -5 5 na -0.50 0.01 0.50 drain-off leakage current (note 5) i d(off) -5 5 na analog signal range -15 15 v drain-source on-resistance r ds(on) 50 85 -0.50 0.08 0.50 drain-on leakage current (note 5) -10 10 na i inh -0.5 -0.00001 0.5 ? i inl -0.5 -0.00001 0.5 ? conditions (note 3) voltage referenced to v- v+........................................................................................44v gnd ....................................................................................25v v l ....................................................(gnd -0.3v) to (v+ +0.3v) digital inputs v s , v d (note 1).........(v- -2v) to (v+ +2v) or 30ma (whichever occurs first) continuous current (any terminal) ......................................30ma peak current, s or d (pulsed at 1ms, 10% duty cycle max) .100ma continuous power dissipation (t a = +70?) 16-pin plastic dip (derate 10.53mw/? above +70?) 842mw 16-pin narrow so (derate 8.70mw/? above +70?) ..696mw operating temperature ranges DG444c/dg445c ................................................0? to +70? DG444d/dg445d .............................................-40? to +85? storage temperature range .............................-65? to +150? lead temperature (soldering, 10sec) .............................+300? v analog t a = +25? v+ = 13.5v, v- = -13.5v, v d = ?.5v, i s = -10ma t a = t min to t max on-resistance match between channels (note 4) t a = +25? 5 t a = t min to t max v d = ?0v, i s = -10ma t a = +25? t a = t min to t max on-resistance flatness (note 4) v d = ?v, i s = -10ma t a = +25? t a = t min to t max v+ = 16.5v, v- = -16.5v, v d = ?5.5v, v s = 15.5v i d(on) or i s(on) input current with input voltage high input current with input voltage low t a = +25? t a = t min to t max t a = +25? t a = t min to t max v in = 2.4v, all others = 0.8v v in = 0.8v, all others = 2.4v v+ = 16.5v, v- = -16.5v, v d = ?5.5v, v s = 15.5v v+ = 16.5v, v- = -16.5v, v d = ?5.5v, v s = ?5.5v min typ max (note 2) switch input note 1: signals on s, d, or in exceeding v+ or v- are clamped by internal diodes. limit forward current to maximum current rating.
DG444/dg445 improved, quad, spst analog switches _______________________________________________________________________________________ 3 electrical characteristics?ual supplies (continued) (v+ = 15v, v- = -15v, v l = 5v, gnd = 0v, v inh = 2.4v, v inl = 0.8v, t a = t min to t max , unless otherwise noted.) parameter t a = +25? symbol min typ max (note 2) t a = t min to t max units t a = +25? i- -5 5 ? negative supply current t a = t min to t max -1 -0.0001 1 positive supply current i+ -1 0.001 1 t a = +25? t a = +25? -1 0.001 1 logic supply current i l -5 5 ? turn-on time v s = ?0v, figure 2 t on -1 -0.0001 1 150 250 ground current ns i gnd -5 5 ? power-supply range v+, v- ?.5 ?0.0 v t a = t min to t max conditions all channels on or off, v+ = 16.5v, v- = -16.5v, v in = 0v or 5v -5 5 all channels on or off, v+ = 16.5v, v- = -16.5v, v in = 0v or 5v all channels on or off, v+ = 16.5v, v- = -16.5v, v in = 0v or 5v ? t a = t min to t max all channels on or off, v+ = 16.5v, v- = -16.5v, v in = 0v or 5v t a = +25? t a = +25? turn-off time DG444, v s = ?0v, figure 2 90 120 ns t a = +25? dg445, v s = ?0v, figure 2 t off 110 170 ns t a = +25? off-isolation rejection ratio (note 6) oirr 60 db t a = +25? charge injection (note 3) q 510 pc t a = +25? crosstalk (note 7) 100 db t a = +25? source-off capacitance f = 1mhz, figure 6 c s(off) 4 pf t a = +25? drain-off capacitance f = 1mhz, figure 6 c d(off) 4 pf c l = 1nf, v gen = 0v, r gen = 0 , figure 3 r l = 50 , c l = 5pf, f = 1mhz, figure 4 r l - 50 , c l = 5pf, f = 1mhz, figure 5 t a = +25? source-on capacitance f = 1mhz, figure 7 c s(on) 16 pf t a = +25? drain-on capacitance f = 1mhz, figure 7 c d(on) 16 pf supply dynamic
DG444/dg445 improved, quad, spst analog switches 4 _______________________________________________________________________________________ electrical characteristics?ingle supply (v+ = 12v, v- = 0v, v l = 5v, gnd = 0v, v inh = 2.4v, v inl = 0.8v, t a = t min to t max , unless otherwise noted.) parameter symbol min typ max (note 2) units t a = +25? 100 160 t a = t min to t max -1 0.001 1 power-supply current i+ -5 5 ? analog signal range 012 v conditions all channels on or off, v in = 0v or 5v (note 3) t a = +25? t a = t min to t max -1 -0.0001 1 negative supply current i- -5 5 ? all channels on or off, v in = 0v or 5v t a = +25? t a = t min to t max -1 -0.0001 1 ground current i gnd -5 5 ? all channels on or off, v in = 0v or 5v t a = +25? t a = t min to t max -1 0.001 1 logic supply current i l -5 5 ? all channels on or off, v in = 0v or 5v v analog v 10.8 24.0 v+, v- power-supply range t a = +25? 200 t a = t min to t max r ds(on) drain-source on-resistance v+ = 10.8v, v l = 5.25v, v d = 3v, 8v, i s = -10ma t a = +25? 300 400 v s = 8v, figure 2 ns t on turn-on time t a = +25? 60 200 v s = 8v, figure 2 ns t off turn-off time t a = +25? 510 pc q charge injection (note 3) c l = 1nf, v gen = 0v, r gen = 0 , figure 3 note 2: typical values are for design aid only, are not guaranteed and are not subject to production testing. the algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. note 3: guaranteed by design. note 4: on-resistance match between channels and flatness are guaranteed only with bipolar-supply operation. flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured at the extremes of the speci- fied analog signal range. note 5: leakage parameters i s(off) , i d(off) , i d(on) , and is (on) , are100% tested at the maximum rated hot temperature and guaranteed at +25?. note 6: off-isolation rejection ratio = 20log (v d /v s ), v d = output, v s = input to off switch. note 7: between any two switches. switch dynamic supply __________________________________________typical operating characteristics (t a = +25?, unless otherwise noted.) on leakage currents on leakage (na) -2 -1 0 1 2 -15 0 15 v s , v d (v) t a = +125? t a = +85? v+ = 15v
v- = -15v DG444/5-1 -10 -5 510 off leakage currents off leakage (na) -1 0 -0.5 0.5 1 v s , v d (v) DG444/5-2 -15 0 15 -10 -5 510 t a = +125? v+ = 15v
v- = -15v t a = +85? switching threshold vs.
bipolar supply voltage v in (v) 0 0.5 1.5 2.0 2.5 3.0 3.5 ? ?0 ?5 ?0 bipolar supply voltage (v) DG444/5-3 in hi min in low max
DG444/dg445 improved, quad, spst analog switches _______________________________________________________________________________________ 5 ____________________________typical operating characteristics (continued) (t a = +25?, unless otherwise noted.) on-resistance vs. v d
and unipolar-supply voltage 0 25 50 75 100 125 0 5 10 15 20 v d (v) r ds(on) ( w ) DG444/5-4 v+ = 10v v+ = 15v v+ = 20v 150 v+ = 5v on-resistance vs. v d , unipolar- supply voltage and temperature 0 25 50 75 100 125 150 r ds(on) ( w ) 04 812 v d (v) DG444/5-7 t a = +125? t a = +25? t a = -40? v+ = 12v
v- = 0v on-resistance vs. v d and
bipolar-supply voltage r ds(on) ( w ) 30 60 90 120 -20 -10 0 10 20 v d (v) 0 DG444/5-5 ?v ?0v ?5v ?0v on-resistance vs. v d , bipolar
supply voltage and temperature r ds(on) ( w ) 0 20 40 60 80 100 v d (v) DG444/5-6 t a = +125? t a = -55? t a = +25? v+ = 15v, v- = -15v -15 0 15 -10 -5 510 switching time vs.
bipolar-supply voltage time (ns) 0 40 80 120 160 ? ?0 ?5 ?0 bipolar-supply voltage (v) DG444/5-8 t on t off switching time vs.
unipolar-supply voltage time (ns) 0 50 100 150 200 10 15 20 25 unipolar-supply voltage (v) v- = 0v DG444/5-9 t on t off charge injection vs.
v d voltage q (pc) -20 0 20 -15 -10 0 10 15 v d (v) DG444/5-10 v+ = 15v
v- = -15v
c l = 1nf charge injection vs.
v d voltage q (pc) -10 0 0 5 10 15 v d (v) DG444/5-11 v+ = 12v
v- = 0v
c l = 1nf 10
______________________________________________timing diagrams/test circuits t off 0.8 x v out v out 0.8 x v out t f < 20ns
t r < 20ns 50% 0v 0v +3v switch
output logic input waveform is inverted for switches
that have the opposite logic sense. t on switch
input logic
input
+3v in +5v v- -15v ( ) r l c l v out s c l includes fixture and stray capacitance. gnd repeat test for channels 2, 3, and 4. v out = v d r l
r l + r ds(on) logic
input v l +15v v+ d DG444
dg445 figure 2. switching time __________applications information general operation 1. switches are open when power is off. 2. in, d, and s should not exceed v+ or v-, even with the power off. 3. switch leakage is from each analog switch terminal to v+ or v-, not to other switch terminals. operation with supply voltages other than ?5v using supply voltages other than ?5v will reduce the analog signal range. the DG444/dg445 switches oper- ate with ?.5v to ?0v bipolar supplies or with a +10v to +30v single supply; connect v- to 0v when operating with a single supply. also, all device types can operate with unbalanced supplies such as +24v and -5v. v l must be connected to +5v to be ttl compatible, or to v+ for cmos-logic level inputs. the typical operating characteristics graphs show typical on-resistance with ?0v, ?5v, ?0v, and ?v supplies. (switching times increase by a factor of two or more for operation at ?v.) overvoltage protection proper power-supply sequencing is recommended for all cmos devices. do not exceed the absolute maximum ratings because stresses beyond the list- ed ratings may cause permanent damage to the devices. always sequence v+ on first, followed by v l , v-, and logic inputs. if power-supply sequenc- ing is not possible, add two small, external signal diodes in series with supply pins for overvoltage protection (figure 1). adding diodes reduces the analog signal range to 1v below v+ and 1v above v-, but low switch resistance and low leakage char- acteristics are unaffected. device operation is unchanged, and the difference between v+ and v- should not exceed +44v. DG444/dg445 improved, quad, spst analog switches 6 _______________________________________________________________________________________ _____________________pin description v+ d v- s v g figure 1. overvoltage protection using external blocking diodes 2, 15, 10, 7 positive supply-voltage input connected to substrate v+ 13 logic supply-voltage input v l 12 ground gnd 5 negative supply-voltage input v- 4 pin source outputs s1-s4 3, 14, 11, 6 drain outputs d1-d4 logic control inputs in1-in4 1, 16, 9, 8 function name
DG444/dg445 improved, quad, spst analog switches _______________________________________________________________________________________ 7 d v out off on off v out in DG444 in dg445 off off on q = d v out c l -15v v- v+ in gnd s +15v r gen v gen v in = +3v c l v out v l +5v d DG444
dg445 figure 3. charge injection _________________________________timing diagrams/test circuits (continued) network
analyzer signal
generator r gen = 50 w d s gnd r l 10dbm 10nf v+ +15v in 0v or +2.4v v- -15v 10nf +5v v l DG444
dg445 figure 4. off-isolation rejection ratio network
analyzer signal
generator r gen = 50 w 0v or +2.4v in d gnd r l 10dbm 10nf +15v d in s nc 0v or +2.4v 50 w v- -15v 10nf +5v s v l v+ DG444
dg445 figure 5. crosstalk capacitance
meter d s gnd 10nf +15v in 0v or +2.4v v- -15v 10nf f = 1mhz +5v v l v+ DG444
dg445 figure 6. source/drain-off capacitance d s gnd 10nf +15v in 0v or +2.4v v- -15v 10nf v+ +5v v l v d DG444
dg445 capacitance
meter f = 1mhz figure 7. source/drain-on capacitance
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. 8 ___________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 1994 maxim integrated products printed usa is a registered trademark of maxim integrated products. DG444/dg445 improved, quad, spst analog switches ___________________chip topography s2 v+ s3 v l s1 d2 d3 in3 in4 0.091"
(2.31mm) 0.071"
(1.80mm) in2 in1 d1 v- gnd d4 s4 transistor count: 126 substrate connected to v+ _ordering information (continued) * contact factory for dice specifications. part temp. range pin-package dg445 cj 0? to +70? 16 plastic dip dg445cy 0? to +70? 16 narrow so dg445c/d 0? to +70? dice* dg445dj -40? to +85? 16 plastic dip dg445dy -40? to +85? 16 narrow so ________________________________________________________package information c a a2 e1 d e e a e b a3 b1 b dim
a
a1
a2
a3
b
b1
c
d
d1
e
e1
e
e a
e b
l
a min
? 0.015
0.125
0.055
0.016
0.050
0.008
0.745
0.005
0.300
0.240
? 0.115
0? max
0.200
? 0.150
0.080
0.022
0.065
0.012
0.765
0.030
0.325
0.280
0.400
0.150
15? min
? 0.38
3.18
1.40
0.41
1.27
0.20
18.92
0.13
7.62
6.10
? 2.92
0? max
5.08
? 3.81
2.03
0.56
1.65
0.30
19.43
0.76
8.26
7.11
10.16
3.81
15? inches millimeters 2.54 bsc 7.62 bsc 0.100 bsc 0.300 bsc a1 l d1 e 21-587a a 16-pin plastic
dual-in-line
package
|
