a 12?bit, 100 msps a/d converter preliminary 10/01/98 AD9432 rev .20 analog devices, inc., 1996 information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of analog devices. one technology way, p.o box 9106, norwood, ma 02062?9106, usa tel: 617/329?4700 fax: 617?326?8703 the AD9432 is an 12-bit monolithic sampling analog?to?digital converter with an on?chip track?and?hold circuit and is optimized for high speed conversion and ease of use. the product operates at a 100 msps conversion rate with outstanding dynamic performance over its full operating range. the adc requires only a single 5.0v power supply and a 100mhz encode clock for full?performance operation. no external reference or driver components are required for many applications. the digital outputs are ttl/cmos compatible and a separate output power supply pin supports interfacing with 3.3v logic. the encoder input supports either differential or single-ended and is ttl/cmos compatible. the 12-bit digital outputs can be operated from +3.0v (2.5v to 3.6v) supplies. fabricated on an advanced bicmos process, the AD9432 is available in a 52 pin plastic quad flat package (52 lqfp) specified over the industrial temperature range (?40c to +85c). features 12?bit, 100msps adc on-chip linear self-calibration loop two?s complement output format on?chip reference and track/hold target low power: 850 mw typical at 100 msps target: 500 mhz analog bandwidth target: snr = 67db @ 47mhz target: sfdr = 80db @ 30mhz a in 2.0 vp?p differential analog input range single +5.0v supply operation +3.3v cmos/ttl outputs applications communications basestations and ?zero-if? subsystems wireless local loop (wll) local multipoint distribution service (lmds) adc output staging timing gnd v dd ain/ encode AD9432 t/h 12 ain ref ref out ref in d 11 -d 0 encode/ v cc 12
AD9432?target specifications AD9432 advance technical information ? 10/01/1998 ? 2 ? rev .20 electrical characteristics 1 (v dd = 3.0v, v cc = 5.0v; external reference; encode = 100 msps, unless otherwise noted) test AD9432bst-100 parameter temp level min typical max units resolution 10 bits dc accuracy differential nonlinearity +25c full i vi 0.5 lsb lsb integral nonlinearity +25c full i vi 0.75 lsb lsb no missing codes full vi guaranteed gain error +25c full i vi 1 % fs % fs gain tempco full v 150 ppm/c analog input input voltage range (with respect to ain\) full v 1.0 v p?p common mode vo ltage full v 3.0 v input offset voltage +25c full i i 3 mv mv reference voltage +25c i 2.5 v input resistance +25c i 3 k w full i k w input capacitance +25c v 4 pf input bias current +25c full i i 15 m a m a analog bandwi dth, full power +25c v 500 mhz switching performance maximum conversion rate full vi 100 msps minimum conversion rate full iv 2 msps encode pulse width high (t eh ) +25c iv 5.0 ns encode pulse width low (t el ) +25c iv 5.0 ns apertur e delay (t a ) +25c v 2.0 ns aperture uncertainty (jitter) +25c v 0.2 ps rms output valid time (t v ) full vi 4.0 6.0 ns output propagation delay (t pd ) full vi 8.0 11.0 ns output rise time (t r ) full vi 1.4 ns output fall time (t f ) full vi 1.0 ns digital inputs differential input (enc,enc\) logic "1" voltage full full iv iv 0.4 2.0 3.5 v v logic "0" voltage full iv 0.8 v logic "1" current full vi 1 a logic "0" current full vi 1 a input capacitance +25c v 4.5 pf digital outputs logic "1" voltage (v dd = +3.3v) full vi v dd -0.05 v logic "0" voltage (v dd = +3.3v) full vi 0.05 v output coding two?s complement power supply power dissipation full vi 750 mw power supply rejection r atio (psrr) +25c i 1 mv/v
AD9432 rev. 20 ? 3 ? AD9432 advance technical information ? 10/01/1998 test AD9432br parameter temp level min typical max units dynamic performance signal?to?noise ratio (snr) (without harmonics) f in = 10 mhz f in = 20 mhz f in = 47 mhz +25c full +25c full +25c full i v i v i v 68 68 67 db db db db db db signal?to?noise ratio (sinad) (with harmonics) f in = 10 mhz f in = 20 mhz f in = 47 mhz +25c full +25c full +25c full i v i v i v 67 66.5 65 db db db db db db effe ctive number of bits f in = 10 mhz f in = 20 mhz f in = 47 mhz +25c +25c +25c i i i 11.0 10.9 10.5 bits bits bits 2nd harmonic distortion f in = 10 mhz f in = 20 mhz f in = 47 mhz +25c +25c +25c i i i 78 78 71 dbc dbc dbc 3rd harmonic distortion f in = 10 mhz f in = 20 mhz f in = 47 mhz +25c +25c +25c i i i 78 78 71 dbc dbc dbc two?tone intermod distortion (imd) f in = 10 mhz f in = 20 mhz f in = 47 mhz +25c +25c +25c v v v 78 78 71 dbc dbc dbc notes 1. target specifications only for product development purposes. ordering guide model temperature range package option AD9432bst-100 AD9432/pcb ?40c to +85c +25c evaluation board * explanation of test levels test level i 100% production te sted. ii 100% production tested at +25c and sample tested at specified temperatures. iii sample tested only. iv parameter is guaranteed by design and characterization testing. v parameter is a typical value only. vi 100% production tested at +25c; guaran teed by design and characterization testing for industrial temperature range. absolute maximum ratings * v dd ................................ ................................ ....................... +4 v v cc ................................ ................................ ......................... +6v analog inputs ................................ .............. -0.5v to v cc + 0.5 v digital inputs ................................ ............... -0.5v to v dd + 0.5 v vref in ................................ ...................... -0.5v to v cc + 0.5 v digital output current ................................ ........................ 20 ma operating temperature ................................ ....... ?55c to +125 c storage temperature ................................ .......... ?65c to +150 c maximum junction temperature ................................ ........ +175 c maximum case temperature ................................ ............. +150 c * stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions outside of those indicated in the operation sections of this specification is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability.
AD9432 AD9432 advance technical information ? 10/01/1998 ? 4 ? rev .20 pin descriptions pin number datasheet AD9432bst name function 1,3,4,9,11,33,34,35,38,43, 48,51 gnd analog ground 2,5,6,36,37,44,47,52 vcc analog supply (+5v) 7 encode/ encode clock for adc ? complementary 8 encode encode clock for adc ? true - (adc samples on rising edge of encode) 10,39,40,41,42 dnc do not connect 14 or out of range output. 15-20, 25-30 d11-0 digital output 12,21,24,31 dgnd digital output ground 13,22,23,32 vdd digital output power supply (+3v) 45 vrefin reference input for adc (2.5v typical) 46 vrefout internal reference output (2.5v typical); bypass with 0.1uf to vcc 49 ain analog input ? true 50 ain/ analog input ? complementary pin configuration 36001 1 2 4 3 5 6 7 8 9 10 11 12 13 39 38 36 37 35 34 33 32 31 30 29 28 27 52 51 49 50 48 47 46 45 44 43 42 41 40 14 15 17 16 18 19 20 21 22 23 24 25 26 AD9432bst-100 top view (not to scale) or (msb) d11 d10 d9 d8 d7 d6 d5 d4 dgnd dgnd vdd vdd gnd encode/ encode dnc vcc vcc vcc gnd dgnd gnd gnd gnd v dd vcc vrefin vrefout ain/ ain gnd gnd vcc vcc gnd dnc dnc dnc d3 d2 d1 d0 (lsb) vdd dgnd gnd gnd gnd gnd dnc vcc vcc (to be finalized)
|
