View MAX4121_1455522.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

_______________general description the max4111/MAX4121/max4221 wideband video switches are optimized for high-definition, broadcast- quality, composite (hdtv, ntsc, pal, secam, and rgb) video switching arrays. their open-loop buffer amplifiers offer 0.1db gain flatness to 150mhz. they operate from ?v supplies and feature differential phase and gain error of only 0.01?0.01%, respectively. the ultra-low switching glitch (13mv) is positive to avoid confusion with any sync pulse. ideal as building blocks in large arrays, these devices feature a constant, high input impedance and a disable function that puts the outputs into a high-impedance state and reduces the operating current to only 250?. the open-loop architecture allows the outputs to drive capacitive loads without oscillation. other key features include -92db crosstalk and -78db isolation (MAX4121). the max4111/MAX4121/max4221 are offered in nar- row plastic dip and so packages. see the table below for key features: ________________________applications video-router and crosspoint arrays broadcast/hdtv-quality color signal multiplexing rf and if routing graphics color-signal routing telecom routing data acquisition ____________________________features ? -3db bandwidth of 330mhz ? 0.1db gain flatness of 150mhz ? 700v/? slew rate ? 0.01?0.01% differential phase/gain ? low power: 5.5ma max ? -92db crosstalk and -78db off isolation at 30mhz ? high-z outputs when disabled ? 3pf input capacitance ? ultra-low switching glitch ? on-board control logic max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks ________________________________________________________________ maxim integrated products 1 1 2 3 4 8 7 6 5 en v cc out v ee n.c. gnd in gnd max4111 top view so 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 sel0 sel1 v cc out0 gnd in1 gnd in0 max4221 v ee out1 sel2 sel3 in3 gnd in2 gnd narrow so 1 2 3 4 8 7 6 5 en v cc out v ee in1 gnd in0 a0 MAX4121 so ___________________________________pin configurations/functional diagrams call toll free 1-800-998-8800 for free samples or literature. 19-0402; rev 0; 6/95 part max4111 csa MAX4121 csa max4221 cse 0? to +70? 0? to +70? 0? to +70? temp. range pin-package 8 so 8 so 16 narrow so evaluation kit available ______________ordering information part description pins max4111 spst, single-input, single-output switch 8 MAX4121 spdt, 2-input, single-output switch 8 max4221 dual, spdt, 2-input, single-output switch 16
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v s = ?v, -2.5v v in +2.5v, r l = 5k , c l 5pf, t a = 0? to +70?, unless otherwise noted. typical values are at t a = +25?.) 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. supply voltages v cc ....................................................................................+6v v ee ......................................................................................-6v v cc -v ee ...........................................................................+12v analog input voltage .......................(v ee - 0.3v) to (v cc + 0.3v) digital input voltage ...................................-0.3v to (v cc + 0.3v) duration of short circuit to ground............................continuous continuous power dissipation (t a = +70?) 8-pin so (derate 5.88mw/? above +70?)................471mw 16-pin narrow so (derate 8.70mw/? above +70?) ...696mw operating temperature range...............................0? to +70? storage temperature range .............................-65? to +160? junction temperature ......................................................+150? lead temperature (soldering, 10sec) .............................+300? v s = ?.5v to ?.5v v s = ?.5v to ?.5v channel selected v out = 0v f = dc to 50mhz v in = ?.5v v v s = ?.5v to ?.5v v s = ?.5v to ?.5v channel disabled t a = t min to t max channel selected v in = 0v per channel t a = +25? v s = ?.5v to ?.5v v in = 0v, channel enabled or disabled conditions v 0.8 v inl logic input low voltage v 2.0 v inh logic input high voltage pf 5 c out(off) disabled output capacitance m 30 r out(off) disabled output resistance na 10 i out(off) disabled output current 20 r out output resistance v/v 0.97 1.0 a v voltage gain 0.98 1.0 t a = +25? db 50 psrr power-supply rejection ratio t a = t min to t max ? mv ?5 v os output offset voltage ? ?0 10 i inl pf c in input capacitance 4.0 5.5 t a = +25? t a = t min to t max ?.5 ?.0 ?.5 v s 3 operating supply voltage logic input low current ? m 100 r in input resistance 0.4 10 i inh ? ?.02 i b input bias current 6.5 150 200 v ?.5 v in input voltage range ?.5 ?.0 channel disabled logic input high current units min typ max symbol parameter ma i cc, i ee operating supply current max4111/MAX4121 ? 250 350 i cc, i ee disabled supply current dc parameters max4221
db max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks _______________________________________________________________________________________ 3 electrical characteristics (v s = ?v, -2.5v v in +2.5v, r l = 5k , c l 5pf, t a = 0? to +70?, unless otherwise noted. typical values are at t a = +25?.) note 1: full-power bandwidth is inferred from slew rate (sr) testing by the equation sr = w e p , where e p is the peak output voltage and w =2 p f. note 2: differential gain and phase are tested using a modulated ramp, 100ire (0.714v). v in = 1.4vp-p f = 30mhz, v in = 1.4vp-p f = 30mhz, v in = 1.4vp-p v out = 5vp-p chip-to-chip, f = 3.58mhz f = 3.58mhz v in = 5vp-p v in = 0.1vp-p dc to 30mhz dc to 150mhz f = 3.58mhz conditions dbc -70 third harmonic dbc -65 second harmonic degrees ?.2 input-output delay matching ps 860 group delay mvp-p 13 switching transient ns 500 t on channel switching on time ? 1.0 t off channel switching off time -92 degrees 0.01 dp differential phase (note 2) 110 700 % 0.01 dg differential gain (note 2) db 0.08 gain peaking mhz 45 fpbw full-power bandwidth (note 1) mhz 330 f 3db -3db bandwidth 0.02 db 0.1 gain flatness units min typ max symbol parameter v in = 1vp-p, f = 30mhz db -70 all-hostile crosstalk v in = 1vp-p, f = 30mhz, see test circuit db 86 off isolation MAX4121 max4221 max4111 v out = 1.4vp-p v/? 500 sr slew rate v in = 0.1vp-p ps 950 t r/ t f small-signal rise time MAX4121 84 max4221 78 ac parameters
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks 4 _______________________________________________________________________________________ __________________________________________typical operating characteristics (v s = ?v, r l = 5k , c l 5pf, t a = +25?, unless otherwise noted.) -2 1 10 1000 gain vs. frequency -10 -6 0 2 -8 -4 -12 -16 -18 -14 max4111 toc-01 frequency (mhz) gain (db) 100 -0.1 1 10 100 gain flatness -0.3 0 -0.4 -0.2 -0.6 -0.7 -0.5 0.1 0.2 0.3 max4111 toc-02 frequency (mhz) gain (db) 1000 0.1 1 100 500 output resistance vs. frequency 40 10 0 20 30 max4111 toc-03 frequency (mhz) output resistance ( w ) 10 0 10k 100k 10m 100m power-supply rejection ratio vs. frequency 40 20 -10 30 10 50 60 70 80 90 max4111 toc-04 frequency (hz) amplitude (db) 1m v cc v ee -40 1 100 1000 max4111 off isolation vs. frequency 40 0 20 -20 60 140 160 100 120 80 max4111 toc-07 frequency (mhz) amplitude (db) 10 40 1 100 1000 MAX4121 all-hostile crosstalk vs. frequency -40 0 -20 20 -60 -140 -160 -100 -120 -80 max4111 toc-05 frequency (mhz) amplitude (db) 10 40 1 10 1000 max4221 all-hostile crosstalk vs. frequency -40 0 60 -20 20 -60 -140 -100 -120 -80 max4111 toc-06 frequency (mhz) amplitude (db) 100 -40 1 100 1000 MAX4121 off isolation vs. frequency 40 0 20 -20 60 140 160 100 120 80 max4111 toc-08 frequency (mhz) amplitude (db) 10 -40 1 10 1000 max4221 off isolation vs. frequency 40 0 -60 20 -20 60 140 100 120 80 max4111 toc-09 frequency (mhz) amplitude (db) 100
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks _______________________________________________________________________________________ 5 max14111 toc-10 time (5ns/div) volts (100mv/div) in gnd gnd out small-signal pulse response (r l = 5k w ) max14111 toc-11 time (5ns/div) out (1v/div) in (2.5v/div) gnd gnd large-signal pulse response (r l = 5k w ) volts max14111 toc-12 time (5ns/div) volts (100mv/div) in gnd gnd out small-signal pulse response (c l = 47pf, r l = open) max14111 toc-14 time (1 m s/div) 1v/div 2v/div enable/disable delay time (input = 1.1v) output enable out gnd max14111 toc-13 time (10ns/div) out (1v/div) in 2.5v/div gnd gnd large-signal pulse response (c l = 47pf, r l = open) volts max14111 toc-15 time (1 m s/div) 10mv/div 2v/div output glitch amplitude amplitude output a0 ____________________________typical operating characteristics (continued) (v s = ?v, r l = 5k , c l 5pf, t a = +25?, unless otherwise noted.)
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks 6 _______________________________________________________________________________________ ____________________________typical operating characteristics (continued) (v s = ?v, r l = 5k , c l 5pf, t a = +25?, unless otherwise noted.) 1 100 1m 10g 100m noise voltage vs. frequency 3 100 30 10 1 max4111 toc-16 frequency (hz) noise voltage (nv ? hz ) 10k 3.4 070 supply current vs. temperature 5.0 max4111 toc-17 temperature ( c) supply current (ma) 30 4.2 3.8 10 20 60 4.6 3.6 4.4 4.0 4.8 40 50 i ee i cc -0.110 -3 gain vs. input voltage and temperature max4111 toc-18 input voltage (v) gain (db) -0.105 -0.100 -0.095 -0.090 -0.085 -2 -1 0 1 2 3 t a = +25? t a = 0? t a = +70? 0 0 bandwidth vs. load capacitance max4111 toc-19 load capacitance (pf) bandwidth (mhz) 50 100 150 200 250 300 350 20 40 60 80 100 r l = open -3db bw -0.1db bw -1.6 0 gain vs. load resistance max4111 toc-20 r l (k w ) gain (db) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 12 34 5
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks _______________________________________________________________________________________ 7 _______________detailed description the max4111/MAX4121/max4221 video switches are manufactured with maxim? proprietary, ultra-high fre- quency, complementary bipolar process that yields high bandwidth and low capacitance. make-before- break switching is used to reduce noise and glitches, even when switching from part to part in large arrays. the input buffers provide a constant high input imped- ance, and prevent the make-before-break action from feeding back to the input. the design of the switching mechanism limits the inevitable glitch to less than 13mvp-p. in addition, the glitch pulse is positive to avoid confusion with negative sync pulses. unity-gain buffers isolate other inputs from the switch- ing action of large multiplex arrays. these buffers can drive 5k resistive loads. in addition, these devices drive capacitive loads without oscillation. load capaci- tance is limited only by system bandwidth require- ments. the max4111/MAX4121/max4221 do not contain buffer latches. the digital inputs are transparent. ______________________________________________________________pin description max4221 MAX4121 max4111 15, 16 11, 13 9, 10 14 12 6, 8 1, 3 2, 4, 5, 7 pin 8 7 5 6 2, 4 1 3 logic inputs. channel selection bits for out0 of the dual 2x1 (max4221). see table 3. sel1, sel0 signal outputs out1, out0 logic inputs. channel selection bits for out1 of the dual 2x1 (max4221). see table 3. sel3, sel2 logic input. output enable for the 1x1, 2x1 switches. a logic high on this pin enables the output. a logic low causes the output to assume a high- impedance state, and reduces supply current. en 8 positive power-supply voltage. connect to +5v. decouple to power ground. v cc 7 negative power-supply voltage. connect to -5v. decouple to power ground. v ee 5 signal output out 6 signal inputs for the dual 2x1 switch in2, in3 signal input in 2 signal input in0, in1 no connect?ot internally connected n.c. 4 logic input. channel selection bit for the 2x1. see table 2. a0 analog (signal) ground. since inputs are isolated by these grounds, gnd should be as noise-free as possible. gnd 1, 3 function name
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks 8 _______________________________________________________________________________________ __________applications information grounding, bypassing, and pc board layout to obtain the full 330mhz bandwidth of these switches, microstrip and stripline techniques are recommended. to ensure your pc board does not degrade the switch? performance, it? wise to design the board for a frequency greater than 1ghz. even with very short runs, it? good practice to use this technique at critical points such as inputs and outputs. use the following guidelines when designing the board: do not use wire-wrap boards, because they are too inductive. do not use ic sockets. they increase parasitic capacitance and inductance. in general, surface-mount components have shorter leads and lower parasitic reactance, and give better high-frequency performance than through-hole com- ponents. the pc board should have at least two layers, with one side a signal side and the other a ground plane. keep signal lines as short and straight as possible. do not make 90 turns; round all corners. the ground plane should be as free from voids as possible. bypass components?apacitors surface-mount ceramic capacitors are recommended to achieve good high-frequency bypassing. a 0.1? capacitor in parallel with a 1000pf capacitor should be used for each supply. the capacitors should be locat- ed as close to the ics supply pins as possible, with the smaller value capacitor being closer to the ic than the other. creating larger arrays the max4111/MAX4121/max4221 were designed as building blocks for larger arrays. the single-pole switch allows the system designer much greater control over crosstalk than multiple switches in a single ic. for this reason, cable drivers have not been included in the switch design because of the high-power drive required (see figure 6). even though the stability of these devices is not wors- ened by adding capacitance, you may want to limit the number of switches connected together. the max4111/MAX4121/max4221 have a finite input capa- citance of about 3pf and a dynamic output resistance of about 20 . this causes a pole at a little more than 2.7ghz. however, in a large array with many switch inputs, the total capacitance is n x 3pf, where ??is the number of switches connected in parallel. the pole will be located at: c stray = stray capacitance at the interconnect if the maximum number of switches that may be con- nected while still maintaining bandwidth is less than your system requirements, use a unity-gain buffer amplifier to isolate the switch from the remainder of the inputs. 1 23 20 p ( ) xnx pf c x mhz stray +w table 1. max4111 truth table table 2. MAX4121 truth table table 3. max4221 truth table en out 0 high-z 1 in a0 en out x 0 high-z 0 1 in0 1 1 in1 note: sel0 = sel1 = 1 and/or sel2 = sel3 = 1 is not allowed. enabling these states will not damage the device, but may cause excessive supply currents and distortion. na 1 1 in3 1 0 in2 0 1 high-z 0 0 out1 sel3 sel2 na 1 1 in1 1 0 in0 0 1 high-z 0 0 out0 sel1 sel0
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks _______________________________________________________________________________________ 9 _________________________________________________________________test circuits max4111 network analyzer * 20 w resistor used to simulate the output of an on switch. in this way, operation in an array is simulated. 50 w 20 w* MAX4121 high-impedance probe network analyzer MAX4121 high-impedance probe network analyzer * 20 w resistor used to simulate the output of an on switch. in this way, operation in an array is simulated. 20 w* figure 1. max4111 off isolation figure 2. MAX4121 all-hostile crosstalk figure 3. MAX4121 off isolation
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks 10 ______________________________________________________________________________________ max4221 network analyzer high-impedance probe 50 w 50 w 50 w 50 w max4221 network analyzer * 20 w resistor used to simulate the output of an on switch. in this way, operation in an array is simulated. 20 w* 50 w 50 w 50 w 50 w high-impedance probe figure 5. max4221 off isolation figure 4. max4221 all-hostile crosstalk
max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks ______________________________________________________________________________________ 11 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 sel0a sel1a v cc outa max4221 v ee outb sel0b sel1b in0a 75 w 75 w 75 w 75 w in1a in0b in1b 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 sel2a sel3a v cc max4221 v ee sel2b sel3b in2a 75 w 75 w 75 w 75 w in3a in2b in3b 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 sel4a sel5a v cc max4221 v ee sel4b sel5b in4a 75 w 75 w 75 w 75 w in5a in4b in5b 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 sel6a = signal ground power- supply bypassing not shown. sel7a v cc max4221 v ee sel6b sel7b in6a 75 w 75 w 75 w 75 w in7a in6b in7b figure 6. 8x2 multiplexer using max4221
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. 12 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 1995 maxim integrated products printed usa is a registered trademark of maxim integrated products. max4111/MAX4121/max4221 330mhz buffered video switches/ crosspoint building blocks ________________________________________________________package information dim a a1 b c e e h l min 0.053 0.004 0.014 0.007 0.150 0.228 0.016 max 0.069 0.010 0.019 0.010 0.157 0.244 0.050 min 1.35 0.10 0.35 0.19 3.80 5.80 0.40 max 1.75 0.25 0.49 0.25 4.00 6.20 1.27 inches millimeters 21-0041a narrow so small-outline package (0.150 in.) dim d d d min 0.189 0.337 0.386 max 0.197 0.344 0.394 min 4.80 8.55 9.80 max 5.00 8.75 10.00 inches millimeters pins 8 14 16 1.27 0.050 l 0?8 h e d e a a1 c 0.101mm 0.004in. b

▲Up To Search▲

Price & Availability of MAX4121

	To Download MAX4121 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .