adsd-1410 dual, 14-bit, 10msps sampling a/d converter datel, inc., mansfield, ma 02048 (usa) ? tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 ? e-mail: sales@datel.com ? internet: www.datel.com pin function pin function 1 input "a" 28 input "b" 2 range 27 ?5v 3 +2.5v reference 26 +15v 4 analog ground 25 +5vd 5 +5va 24 digital ground 6 start convert "a" 23 start convert "b" 7 select 22 enable 8 bit 14 (lsb) 21 bit 1 (msb) 9 bit 13 20 bit 2 10 bit 12 19 bit 3 11 bit 11 18 bit 4 12 bit 10 17 bit 5 13 bit 9 16 bit 6 14 bit 8 15 bit 7 features ? 14-bit resolution ? 10msps sampling rate ? functionally complete ? no missing codes over full military temperature range ? edge-triggered, 1.7 watts ? small, 28-pin, ceramic ddip ? ideal for both time and frequency-domain applications general description the low-cost adsd-1410 is a dual 14-bit, 10msps sampling a/d converter. this device accurately samples full-scale input signals up to nyquist frequencies with no missing codes. the dynamic performance of the adsd-1410 has been optimized to achieve a signal-to-noise ratio (snr) of 78db and a total harmonic distortion (thd) of ?80db. each channel is completely independent allowing operation with independent analog inputs and start convert signals. packaged in a miniature 28-pin ddip, the functionally complete adsd-1410 contains two individual fast-settling sample-hold amplifiers and subranging a/d converters, along with an internal reference, timing/control logic, and error- correction circuitry. digital input and output levels are ttl. the adsd-1410 only requires the rising edge of the start convert pulse to operate. input/output connections figure 1. adsd-1410 functional block diagram product data requiring only 5v and +15v supplies, the adsd-1410 dissipates 1.7 watts. the device is offered with a bipolar (2.0v) analog input range and can be configured for 1.0v to 2.0v input ranges, using an external resistor. models are available in the commercial 0 to +70c, and military ?55 to +125c operating temperature ranges. a proprietary, auto- calibrating, error-correcting circuit enables the device to achieve specified performance over the full military temperature range. typical applications include medical imaging, radar, sonar, communications and instrumentation. ? ? a subsidiary of c&d technologie s 3-state output register analog input "a" 1 analog input "b" 28 7 enable start convert "b" 23 t/h subranging a/d "b" timing and control logic subranging a/d "a" digital correction logic t/h 22 enable start convert "a" 6 +5v analog supply 5 +5v digital supply 25 +15v supply 26 ?5v supply 27 analog ground 4 digital ground 24 power and grounding bit 14 (lsb) bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 (msb) 8 9 10 11 12 13 14 15 16 17 18 19 20 21
adsd-1410 2 +25c 0 to +70c ?55 to +125c analog input min. typ. max. min. typ. max. min. typ. max. units bipolar input voltage range ? ? 2 ? ? 2 ? ? 2 ? volts input resistance (vin a), (vin b) ? 400 ? ? 400 ? ? 400 ? input capacitance ? 6 15 ? 6 15 ? 6 15 pf digital input logic levels logic "1" +2.0 ? ? +2.0 ? ? +2.0 ? ? volts logic "0" ? ? +0.8 ? ? +0.8 ? ? +0.8 volts logic loading "1" ? ? +20 ? ? +20 ? ? +20 a logic loading "0" ? ? ?20 ? ? ?20 ? ? ?20 a start convert positive pulse width ? 45 50 55 45 50 55 45 50 55 ns static performance resolution ? 14 ? ? 14 ? ? 14 ? bits integral nonlinearity (dc input) ? 1 ? ? 2 ? ? 3 ? lsb differential nonlinearity (f in = 10khz) ?0.90 0.5 +1 ?0.90 0.5 +1 ?0.99 0.5 +1.25 lsb full scale absolute accuracy ? 0.1 0.3 ? 0.15 0.5 ? 0.5 0.8 %fsr bipolar zero error (tech note 2) ? 0.3 0.5 ? 0.3 0.5 ? 0.5 0.9 %fsr gain error (tech note 2) ? 0.3 0.5 ? 0.3 0.5 ? 0.5 0.9 %fsr no missing codes (f in = 10khz) 14 ? ? 14 ? ? 14 ? ? bits dynamic performance peak harmonics (?0.5db) dc to 975khz ? ?80 ?78 ? ?80 ?78 ? ?80 ?76 db 975khz to 2.4mhz ? ?76 ?70 ? ?76 ?70 ? ?76 ?68 db total harmonic distortion (?0.5db) dc to 975khz ? ?80 ?77 ? ?80 ?77 ? ?80 ?74 db 975khz to 2.4mhz ? ?75 ?69 ? ?75 ?69 ? ?75 ?69 db signal-to-noise ratio (w/o distortion, ?0.5db) dc to 975khz 76 78 ? 76 78 ? 76 77 ? db 975khz to 2.4mhz 75 77 ? 75 77 ? 75 76 ? db signal-to-noise ratio ? (& distortion, ?0.5db) dc to 975khz 74 74 ? 74 74 ? 73 73 ? db 975khz to 2.4mhz 68 72 ? 68 72 ? 67 72 ? db noise ? 150 ? ? 150 ? ? 150 ? vrms two-tone intermodulation distortion (f in = 240khz, 200khz f s = 10mhz, ?0.5db) ? ?76 ?70 ? ?76 ?70 ? ?76 ?70 db input bandwidth (?3db) small signal (?20db input) ? 30 ? ? 30 ? ? 30 ? mhz large signal (?0.5db input) ? 20 ? ? 20 ? ? 20 ? mhz feedthrough rejection (f in = 500khz) ? 78 ? ? 78 ? ? 78 ? db slew rate ? tbd ? ? tbd ? ? tbd ? v/s aperture delay time ? +1 ? ? +1 ? ? +1 ? ns aperture uncertainty ? 5 ? ? 5 ? ? 5 ? ps rms functional specifications (t a = +25c, +v dd = +5v, ?v dd = ?5v, +vcc = +15v, 10msps sampling rate, 2v input range, and a minimum 3 minute warmup ? unless otherwise specified.) parameters min. typ. max. units operating temp. range, case adsd-1410 ?55 ? +125 c thermal impedance jc ? 6 ? c/watt ca ? 23 ? c/watt storage temperature range ?65 ? +150 c package type 28-pin, metal-sealed, ceramic ddip weight 0.34oz (9.6 grams) absolute maximum ratings parameters limits units +5v supply (pins 5, 25) 0 to +6 volts +15v supply (pin 26) 12 to 17 volts ?5v supply (pin 3) 0 to ?6 volts digital inputs (pins 6, 7, 22, 23 ) ?0.3 to +v dd +0.3 volts analog input (pins 1, 28) 5 volts lead temperature (10 seconds) +300 c physical/environmental
adsd-1410 3 +25c 0 to +70c ?55 to +125c dynamic performance (cont.) min. typ. max. min. typ. max. min. typ. max. units s/h acquisition time ( to 0.003%fsr, 4v step) ? 45 ? ? 45 ? ? 45 ? ns overvoltage recovery time ? 175 ? ? 175 ? ? 175 ? ns a/d conversion rate 10 ? ? 10 ? ? 10 ? ? mhz digital outputs logic levels logic "1" +2.4 ? ? +2.4 ? ? +2.4 ? ? volts logic "0" ? ? +0.4 ? ? +0.4 ? ? +0.4 volts logic loading "1" ? ? ?4 ? ? ?4 ? ? ?4 ma logic loading "0" ? ? +4 ? ? +4 ? ? +4 ma output coding two?s complement power requirements power supply ranges +5v supply +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 +4.9 +5.0 +5.25 volts ?5v supply ?4.75 ?5.0 ?5.25 ?4.75 ?5.0 ?5.45 ?4.9 ?5.2 ?5.45 volts +15v supply +14.75 +15 +15.5 +14.75 +15 +15.5 +14.75 +15 +15.25 volts power supply currents +5v supply ? 220 270 ? 220 270 ? 220 270 ma ?5v supply ? 25 35 ? 25 35 ? 25 35 ma +15v supply ? 20 35 ? 20 35 +14.5 35 35 ma power dissipation ? 1.7 1.9 ? 1.7 1.9 ? 1.7 1.9 watts power supply rejection ? ? 0.05 ? ? 0.05 ? ? 0.05 %fsr/%v footnotes: technical notes 1. obtaining fully specified performance from the adsd-1410 requires careful attention to pc card layout and power supply decoupling. the device?s analog and digital ground systems are connected to each other internally. for optimal performance, tie all ground pins (4 and 24) directly to a large analog ground plane beneath the package. bypass all power supplies to ground with 4.7f tantalum capacitors in parallel with 0.1f ceramic capacitors. locate the bypass capacitors as close to the unit as possible. 2. the adsd-1410 achieves its specified accuracies without the need for external calibration. it is recommended that the +5va and +5vd supplies should be powered up from the same source. the standard input range is 2.0 volts. users desiring an input range from 1.0 volts to 2.0 volts, can use an external input resistor (see page 4). 3. a passive bandpass filter is used at the input of the a/d for all production testing. ? all power supplies should be on before applying a start convert pulse. all supplies and the clock (start convert pulses) must be present during warmup periods. the device must be continuously converting during this time. ? contact datel for other input voltage ranges. ? a 50ns wide start convert pulse is used for all production testing. for applications requiring less than an 10msps sampling rate, wider start convert pulses can be used. ? effective bits is equal to: (snr + distortion) ? 1.76 + 20 log full scale amplitude actual input amplitude 6.02 thermal requirements all datel sampling a/d converters are fully characterized and specified over operating temperature (case) range of ?55 to +125c. all room temperature (t a = +25c) production testing is performed without the use of heat sinks or forced air cooling. thermal impedance figures for each device are listed in their respective specification tables. these devices do not normally require heat sinks, however, standard precautionary design and layout procedures should be used to ensure devices do not overheat. the ground and power planes beneath the package, as well as all pcb signal runs to and from the device, should be as heavy as possible to help conduct heat away from the package. electrically-insulating, thermally-conductive "pads" may be installed underneath the package. devices should be soldered to boards rather than socketed, and of course, minimal air flow over the surface can greatly help reduce the package temperature.
adsd-1410 4 figure 2. timing diagram table 1. output coding input volt. bipolar msb lsb 2v scale 01 1111 1111 1111 +1.99976 +fs ? 1lsb 01 1000 0000 0000 +1.50000 +3/4fs 01 0000 0000 0000 +1.00000 +1/2fs 00 0000 0000 0000 0.00000 0 11 0000 0000 0000 ?1.00000 ?1/2fs 10 1000 0000 0000 ?1.50000 ?3/4fs 10 0000 0000 0001 ?1.99976 ?fs+1lsb 10 0000 0000 0000 ?2.00000 ?fs two?s comp in more severe ambient conditions, the package/junction temperature of a given device can be reduced dramatically (typically 35%) by using one of datel's hs series heat sinks. see ordering information for the assigned part number. request datel application note an8, "heat sinks for dip data converters", or contact datel directly, for additional information. analog input range the standard adsd-1410 has a 2.0 volt input range. users desiring an input range from 1.0 volt up to 2.0 volts, can use an external resistor (r set ), between the range (pin 2) and analog ground (pin 4) pins. r set is determined as follows: for v input voltage range, r set = v 10 - 5v examples: for v = 2v, r set = infinity 1 10 - 5v for v = 1v, r set = = 200 ohms timing the adsd-1410 has a three-pipeline delay for valid output (see figure 2 and table 2). the particular subranging a/d?s output data is selected with the select pin (pin 7), a/d ?a? min(ns) typ(ns) max(ns) tpw minimum convert pulse width 45 50 55 tnctdv new conversion to internal data valid 12 12 20 toetdv output enable to data valid 20 30 37 tseltdv select change to data valid 20 25 37 tdctdv internal data to data valid 12 14 16 todtdz output disable to high-impedence 30 35 45 tctdv conversion to data valid 24 30 36 timing specifications +5vd (pin 25) = +5v, digital output load c l =35pf typ being selected when the select pin is ?low?, and a/d ?b? being selected when select pin is ?high?. a particular a/d?s conversion is initiated by the appropriate start convert signal and the output ?word? will appear at the output data bits, after three start convert signals have been given (assumes output brought high with the enable pin (pin 22)). the detailed timing specifications are given in table 2, and show both dual a/d operation, and also when just a single channel is used. the ?internal data? times are given as information only, indicating when internal systems events (ground current flows) occur. 10mhz start convert select a or b enable data on 30465 bus output bus if enable is low 10ns typ. division select b select b select a an-4 bn-3 an-3 bn-2 highz highz highz highz select a an-2 bn-1 bn-0 data valid data valid data valid 30ns toetdv 35ns todtdz 50ns tpw 25ns tseltdv 16ns tnctdv 14ns tdctdv 30ns tctdv
adsd-1410 5 figure 3. adsd-1410 connection diagram adsd-1410 1 input a range 2 +2.5v ref 3 +15v 26 27 ?5v 6 start con a start con b 23 select a, b gnd enable +5va +5vd lsb b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 msb input b male bnc 100 male bnc 100 d1 d2 d3 d4 d5 d6 d7 en vcc oe q1 q2 q3 q4 q5 q6 q7 74as573 19 msb 18 17 16 15 14 13 11 20 1.10 +5v d1 d2 d3 d4 d5 d6 d7 en 74as573 q1 q2 q3 q4 q5 q6 q7 oe vcc 11 20 1.10 +5v 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 lsb 12 p1 dc25s 13 14 1 + + 10uf 10uf + 10uf 10uf + ?5v +15v 7 42422 525 + + 10uf 10uf +5v +5v 11 12 13 74s86 74s86 8 9 10 3 74s86 1 2 14 +5v 6 74s86 7 5 4 +5v +5v 14 7 8 xtal 12.8m mhz 2 3 1 6 5 4 pr q q cl c d +5v 74act74 200 +5v +5v 200 74act74 pr d q c cl q 13 7 11 12 14 10 9 8 select a select b +5v 28 21 20 19 18 17 16 14 13 12 11 10 9 8 15
datel, inc. 11 cabot boulevard, mansfield, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 ww.datel.com e-mail: sales@datel.com www.cdpowerelectronics.com datel makes no representation that the use of its products in the circuits described herein, or the use of other technical info rmation contained herein, will not infringe upon existing or future patent rights. the descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. specifications are subject to change without notice. the datel logo is a registered datel, inc. trademark. datel (uk) ltd. tadley, england tel: (01256)-880444 internet: www.datel-europe.com e-mail: datel.ltd@datel.com datel s.a.r.l. montigny le bretonneux, france tel: 01-34-60-01-01 internet: www.datel-europe.com e-mail: datel.sarl@datel.com datel gmbh mnchen, germany tel: 89-544334-0 internet: www.datel-europe.com e-mail: datel.gmbh@datel.com datel kk tokyo, japan tel: 3-3779-1031, osaka tel: 6-6354-2025 internet: www.datel-co.jp e-mail: salestko@datel.co.jp, salesosa@datel.co.jp datel china shanghai, china tel: 011-86-51317131 e-mail: davidx@datel.com iso 9001:2000 registered ? ? a subsidiary of c&d technologie s adsd-1410 operating 28-pin model temp. range package ADSD-1410MC 0 to +70c ddip adsd-1410mm ?55 to +125c ddip ordering information mechanical dimensions inches (mm) ds-0438b 11/04 accessories hs-24 heat sink for all adsd-1410 models pin 1 index ( on top) 1.570 max. (39.88) 0.018 0.002 (0.457) 0.100 typ. (2.540) 0.100 (2.540) 0.210 max. (5.334) 0.185 max. (4.70) 0.040 (10.160) 0.012 0.003 (0.305) 1 28 1.300 typ. (33.00) 0.600 0.010 (15.240) 0.100 (2.540) 14 15 0.80 max. (20.32) dimension tolerances (unless otherwise indicated): 2 place decimal (.xx) 0.010 (0.254) 3 place decimal (.xxx) 0.005 (0.127) lead material: kovar alloy lead finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 0.100 (2.540) seating plane 0.025 (0.635) 0.200 max. (5.080)
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