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lt c221/LTC222 1 2212fa micropower operation single 5v or 15v supply operation low charge injection low r on low leakage guaranteed break before make latch resistant design tll/cmos compatible improved second source for dg221/dg222 microprocessor bus compatible the ltc 221 and LTC222 are micropower, quad cmos analog switches which typically dissipate only 250 w from 15v supplies and 40 w from a single 5v supply. onboard latches allow the ltc221 and LTC222 to inter- face directly to most microprocessor buses. the switches have 65 ? typical on resistance and a very high off resis- tance. a break before make characteristic is inherent in these switches to prevent the shorting of two channels. the signal range is 15v with a supply voltage of 15v and 0v to 5v with a single 5v supply. the switches have special charge compensation circuitry which greatly reduces charge injection to a maximum of 25pc ( 15v supplies). the ltc221 and LTC222 are designed for applications such as microprocessor controlled programmable gain amplifiers, automatic test equipment, communication systems, and data acquisition systems. the ltc221 is normally closed and the LTC222 is normally open as shown in the logic table. micropower, low charge injection, quad cmos analog switches with data latches , ltc and lt are registered trademarks of linear technology corporation. features descriptio u supply current ..................... i + = 40 a, i = 5 a max charge injection 15v supplies ................................. 25pc max single 5v supply .................................. 2pc typ r on ............................................................... 65 ? typ signal range ..................................................... 15v two-channel, 12-bit, self calibrating data acquisition system key specificatio s u ltc221/222 ?ta01 5v r1 15v in ?n 10k 150k 100k 120 ? 270 ? gnd in3 in4 wr wr to microprocessor e.g. tms320c25 in2 in1 cs d out v ref v fs clk gnd d1 s1 d2 s2 v in ov to 5v v fs d3 s3 d4 s4 5v v + v ?5v 15v l tc221/LTC222 lt1 006 + logic decoder l tc1292 12-bit adc serial port data bus b0 ?b3 address bus lt 1027 typical applicatio u .com .com .com
lt c221/LTC222 2 2212fa top view j package 16-lead cerdip n package 16-lead pdip j max = 110 c, ja = 120 c/w s package 16-lead plastic so j max = 110 c, ja = 130 c/w order part number ltc221cn ltc221cs LTC222cn LTC222cs ltc221mj ltc221cj LTC222mj LTC222cj 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 in1 d1 s1 v gnd s4 d4 in4 in2 d2 s2 v + wr s3 d3 in3 l tc221m/LTC222m ltc221c/LTC222c p arameter conditions min typ max min typ max units analog signal range 15 15 v r on v s = 10v t min 90 90 ? i d = 1ma 25 c65906590 ? t max 135 135 ? off input leakage i s (off) v d = 14v, v s = 14v 0.01 1 0.01 5na 100 100 na off output leakage i d (0ff) v in = 2.4v, ltc221 0.01 1 0.01 5na v in = 0.8v, LTC222 100 100 na on channel leakage l d (on) v d = v s = 14v, v in = 2.4v, LTC222 0.02 1 0.02 5na v in = 0.8v, ltc221 200 200 na input high voltage v inh , v wrh 2.4 2.4 v input low voltage v inl , v wrl 0.8 0.8 v input high or low current v in = 15v, 0v 1 1 a i inh , i inl , i wrh , i wrl v wr = 15v, 0v c s (off) 55pf c d (off) 12 12 pf c d , c s (on) 30 30 pf i + all channels on or off 16 40 16 40 a v in = v wr = 0v or 4.0v 60 60 a voltages referenced to v v + ........................................................................................... 44v gnd ..................................................................... 25v digital inputs, s, d (note 2) .......... 2v to (v + 2v) or digital inputs, s, d (n20 20ma, whichever occurs first current any input except s or d ................................... 30ma continuous s or d ............................................ 20ma peak s or d (pulsed at 1 ms, 10% duty cycle max) ......... 70ma esd susceptibility (note 3) ...................................... 4kv power dissipation (plastic) ............................... 500mw power dissipation (ceramic) ............................. 900mw operating temperature range ltc221c/LTC222c .................................. 0 c to 70 c ltc221m/LTC222m (obsolete) .. .....55 c to 125 c storage temperature range ................. 65 c to 150 c lead temperature (soldering, 10 sec).................. 300 c consult ltc marketing for parts specified with wider operating temperature ranges. (note 1) absolute axi u rati gs w ww u package/order i for atio uu w inx wr ltc221 LTC222 00 on off 10 off on x1 maintain previous state maintain previous state digital a d dc electrical characteristics u logic table the denotes the specifications which apply over full operating temperature range, otherwise specifications are at t a = 25 c. v + = 15v, v = ?5v, gnd = 0v, unless noted. obsolete package consider the n or s package for alternate source .com .com .com .com
lt c221/LTC222 3 2212fa v + = 15v, v = 15v, gnd = 0v, unless otherwise noted. ltc221m/LTC222m ltc221c/LTC222c p arameter conditions min typ max min typ max units t on v s = 2v, r l = 1k ? , c l = 35pf 290 400 290 400 ns t off 210 300 210 300 t open 20 85 20 85 ns off isolation v s = 2vp-p, r l = 1k ? 75 75 db crosstalk f = 100khz 90 90 charge injection o inj r gen = 0 ? , c l = 1000pf, v gen = 0 5 25 8 25 pc t otal harmonic distortion thd v s = 2vp-p, r l = 10k ? 0.01 0.01 % t on , wr v s = 2v, r l = 1k ? , c l = 35pf 270 400 270 400 ns t off , wr 160 300 160 300 ltc221m/LTC222m ltc221c/LTC222c p arameter conditions min typ max min typ max units i 0.1 5 0.1 5 a 10 10 ltc221m/LTC222m ltc221c/LTC222c p arameter conditions min typ max min typ max units analog signal range 0505 v r on v s = 1.5v, 3v t min 450 520 ? i d = 0.25ma 25 c 280 450 280 520 ? t max 650 650 ? off input leakage i s (off) v d = 4v, 1v; v s = 1v, 4v 0.01 1 0.01 5na (note 4) 100 100 na off output leakage i d (0ff) 0.01 1 0.01 5na 100 100 na on channel leakage l d (on) v d = v s = 1v, 4v 0.01 1 0.01 5na (note 4) 200 200 na input high voltage v inh , v wrh 2.4 2.4 v input low voltage v inl , v wrl 0.8 0.8 v input high or low current v in = 5v, 0v 1 1 a i inh , i inl , i wrh , i wrl v wr = 5v, 0v c s (off) 5 5 pf c d (off) 12 12 pf c d , c s (on) 30 30 pf i + all channels on or off 8 20 8 20 a v in = v wr = 0v or 4.0v 30 30 a ac electrical characteristics digital a d dc electrical characteristics u digital a d dc electrical characteristics u the denotes the specifications which apply over full operating temperature range, otherwise specifications are at t a = 25 c. v + = 15v, v = ?5v, gnd = 0v, unless noted. the denotes the specifications which apply over full operating temperature range, otherwise specifications are at t a = 25 c. v + = 5v, v = gnd = 0v, unless noted. .com .com .com .com
lt c221/LTC222 4 2212fa ltc221/222 ?tpc05 v in (v) 0 i + ( a) 150 200 250 4 100 50 0 1 2 3 5 all i nx tied together wr tied to ground all logic inputs tied together v + = 5v v = 0v t a = 25 c note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired. note 2: signals on s, d, or in exceeding v + or v will be clamped by internal diodes. limit forward diode current to maximum current rating. r on vs v s over supply voltage ac electrical characteristics note 3: in-circuit esd on the switch pins (s or d) exceeds 4kv (see test circuit). note 4: leakage current with a 5v supply is guaranteed by correlation with the 15v leakage current. typical perfor a ce characteristics uw r on vs v s over temperature r on vs v s over temperature positive supply current vs logic input voltage positive supply current vs logic input voltage ltc221/222 ?tpc01 v s (v) ?6 r on ( ? ) 150 12 100 50 200 250 0 ? 0 ?2 ?0 16 ? 4 8 20 t a = 25 c i d = 1ma 5v 10v 20v v supply = 5v, ov 15v ltc221/222 ?tpc04 v in (v) 0 i + ( a) 150 200 250 12 100 50 0 3 6 9 15 v + = 15v v = 15v t a = 25 c all i nx tied together wr tied to ground all logic inputs tied together ltc221/222 ?tpc02 v s (v) r on ( ? ) ?2 60 9 40 20 80 100 0 ? 0 ? ?5 12 ? 3 6 15 v + = 15v v = 15v i d = 1ma ?5 c 125 c 25 c ltc221/222 ?tpc03 v s (v) r on ( ? ) 300 4 200 100 400 500 0 1 0 2 3 5 v + = 5v v = 0v i d = 1ma ?5 c 125 c 25 c v + = 5v, v = gnd = 0v, unless otherwise noted. ltc221m/LTC222m ltc221c/LTC222c p arameter conditions min typ max min typ max units t on v s = 2v, r l = 1k ? , c l = 35pf 450 600 450 600 ns t off 190 300 190 300 ns t open 100 250 100 250 ns off isolation v s = 2v p-p , r l = 1k ? 75 75 db crosstalk f = 100khz 90 90 db charge injection o inj r gen = 0 ? , c l = 1000pf, v gen = 2.5v 2 2 pc t otal harmonic distortion thd v s = 2v p-p , r l = 10k ? 0.01 0.01 % t on , wr v s = 2v, r l = 1k ? , c l = 35pf 430 600 430 600 ns t off , wr 160 300 160 300 ns .com .com .com .com
lt c221/LTC222 5 2212fa switching time test circuit switch output waveform shown for v s = constant with logic input waveform as shown. note that v s may be (+) or (? as per switching time test circuit. v o is the steady applicatio s i for atio wu uu state output switch on. feedthrough via gate capacitance may result in spikes at leading and trailing edge of output waveform. ccrr-channel to channel crosstalk test circuit switching time test circuit charge injection test circuit oirr-off isolation test circuit ltc221/222 ?ai01 v s ov ov ov 3v 3v LTC222 logic input t r < 20ns t r < 20ns ltc221 logic input t r < 20ns t r < 20ns switch input switch output 50% 50% v o 0.9 0.9 logic "0" = sw on logic "1" = sw on v o t on t off ltc221/222 ?ai02 s1 d1 (repeat test for in2, in3 and in4) v o c l 35pf r l 1k r l r l + r ds(on) v o = v s in1 switch output switch input logic input v s = 2v ltc221/222 ?ai03 sx r gen v gen dx inx v o c l = 1000pf ltc221/222 ?ai04 ov ov 3v 3v v o ltc221 inx LTC222 inx ? v o ? v o is the measured voltage error due to charge injection. the error voltage in coulombs is ? q = v l ? ? v o off off on on on on ltc221/222 ?ai05 v s v + v c oirr = 20 log c = 0.001 f//0.1 f chip capacitors signal generator c 15v 15v v d gnd v in inx v s v d r l 1k v s = 2v p-p f = 100khz chan a analyzer chan b ltc221/222 ?ai06 v s1 v + v c oirr = 20 log c = 0.001 f//0.1 f chip capacitors signal generator c nc 50 ? 15v 15v v d2 v s2 v d1 v l gnd v in v in in2 in1 v s1 v d2 r l 1k v s = 2vp-p f = 100khz chan a analyzer chan b .com .com .com .com
lt c221/LTC222 6 2212fa in-circuit esd test circuit applicatio s i for atio wu uu ltc221/222 ?ta07 lt c221/ ltc 222 gnd v 15v 15v 1.5k any source or drain pin esd tester power applied or open circut per mil-std-883c method 3015.2 4kv 100pf 0.1 f 0.1 f v + s or d ltc221/222 ?ai08 ltc221 in LTC222 in v s v o 0v 0v 0v 0v 3v 3v wr 3v logic input t r < 20ns t r < 20ns 50% 50% v o 0.9 0.9 v o t on t off wr wr ltc221/222 ?ai09 s1 d1 (repeat test for in2, in3 and in4) v o c l 35pf r l 1k in1 r l r l + r ds(on) v o = v s switch output switch input logic input logic input v s = 2v wr v ?5v 15v v + gnd ov ltc221/222 ?ai10 ltc221 in LTC222 in ov ov ov 3v 3v 3v t dw t ww t wd wr 1.5v 1.5v 0.8v 0.8v 2.4v 2.4v wr switching time test circuit wr setup conditions wr/input minimum timing requirements parameter min limit units t ww write pulse width 230 ns t dw data valid to write 180 ns t wd data valid after write 30 ns .com .com .com .com
lt c221/LTC222 7 2212fa auto ranging an 8-channel, 10-bit a/d converter applicatio s i for atio wu uu ltc221/222 ?ai11 gnd in3 in4 wr wr in2 in1 d1 s1 d2 s2 v in ov ?5v d3 s3 d4 s4 v l tc221/ l tc222 logic decoder data bus b0 ?b3 to microcontroller e.g. hd64180 address bus l t1027 serial port l tc1090 5v 5v 15v 15v 15v 2.49k ? 4.99k ? 10k ? 20k ? l t1006 + ch0 ch1 ch2 ch3 ch4 ch5 ch6 ch7 com dgnd agnd cs d out v cc d in aclk sclk ref + ref v .com .com .com .com
lt c221/LTC222 8 2212fa 8-channel, 14-bit a/d converter applicatio s i for atio wu uu ltc221/222 ?ai12 gnd in3 in4 wr wr in2 in1 d1 s1 d2 s2 v in 0v to 5v d3 s3 d4 s4 v l tc221/ ltc2 22 logic decoder data bus b0 ?b3 to microcontroller e.g. tms370 address bus l t1027 l tc1090 5v 15v 1k ? 1k ? 1k ? 1k ? 15v ch0 ch1 ch2 ch3 ch4 ch5 ch6 ch7 com dgnd agnd cs d out d in aclk sclk ref + ref v serial port .com .com .com .com
lt c221/LTC222 9 2212fa u package descriptio obsolete package j16 0801 .015 ?.060 (0.380 ?1.520) .100 (2.54) bsc .014 ?.026 (0.360 ?0.660) .045 ?.065 (1.143 ?1.651) .200 (5.080) max .125 (3.175) min .008 ?.018 (0.203 ?0.457) 0 ?15 1 23 4 5 6 78 .220 ?.310 (5.588 ?7.874) .840 (21.336) max .005 (0.127) min 16 13 9 10 11 12 14 15 .025 (0.635) rad typ .300 bsc (7.62 bsc) .045 ?.065 (1.143 ?1.65) full lead option .023 ?.045 (0.584 ?1.143) half lead option corner leads option (4 plcs) note: lead dimensions apply to solder dip/plate or tin plate leads j package 16-lead cerdip (narrow .300 inch, hermetic) (reference ltc dwg # 05-08-1110) .com .com .com .com
lt c221/LTC222 10 2212fa u package descriptio n package 16-lead pdip (narrow .300 inch) (reference ltc dwg # 05-08-1510) n16 0502 .255 .015* (6.477 0.381) .770* (19.558) max 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 .020 (0.508) min .125 (3.175) min .130 .005 (3.302 0.127) .065 (1.651) typ .045 ?.065 (1.143 ?1.651) .018 .003 (0.457 0.076) .100 (2.54) bsc .009 ?.015 (0.229 ?0.381) .300 ?.325 (7.620 ?8.255) .325 +.035 ?015 + 0.889 0.381 8.255 () note: 1. dimensions are inches millimeters *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .010 inch (0.254mm) .com .com .com .com
lt c221/LTC222 11 2212fa u package descriptio .016 ?.050 (0.406 ?1.270) .010 ?.020 (0.254 ?0.508) 45 0 ?8 typ .008 ?.010 (0.203 ?0.254) 1 n 2 3 4 5 6 7 8 n/2 .150 ?.157 (3.810 ?3.988) note 3 16 15 14 13 .386 ?.394 (9.804 ?10.008) note 3 .228 ?.244 (5.791 ?6.197) 12 11 10 9 s16 0502 .053 ?.069 (1.346 ?1.752) .014 ?.019 (0.355 ?0.483) typ .004 ?.010 (0.101 ?0.254) .050 (1.270) bsc .245 min n 123 n/2 .160 .005 recommended solder pad layout .045 .005 .050 bsc .030 .005 typ inches (millimeters) note: 1. dimensions in 2. drawing not to scale 3. these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .006" (0.15mm) s package 16-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610) information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. .com .com .com .com
lt c221/LTC222 12 2212fa related parts part number description comments ltc201/ltc202/ltc203 micropower, low charge injection, quad cmos analog switches dg201/dg202 compatible ltc1380/ltc1393 8-channel/4-channel analog multiplexer with smbus interface 3v to 15v, 8 single ended/4 differential inputs ltc1390/ltc1391 8-channel, analog multiplexer with serial interface 3v to 15v operation linear technology corporation 1 630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com lw/tp 1002 1k rev a ?printed in usa ? l inear technology corporation 1991 .com .com .com

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