figure 1. functional block diagram features miniature 62-pin cermanic package 12-bit resolution, 50khz throughput full-scale input range from 50mv to 10v three-state outputs 16 s.e. or 8 differential input channels auto-sequencing channel addressing mil-std-883 versions no missing codes available in smt or dip packages typical topology is shown. general description using thin and thick-? lm hybrid technology, datel offers complete low-cost data acquisition systems with superior performance and reliability. the hdas-8 (with 8 differential input channels) and the hdas-16 (with 16 single-ended input channels) are complete, high-performance, 12-bit data acquisition systems in 62-pin smt or dip packages. each hdas may be expanded up to 32 single-ended or 16 differential channels by adding externalmultiplexers. internal channel address sequencing is automatic after each conversion, or the user may supply external channel addresses. internal hdas circuitry includes: analog input multiplexer (16 s.e. or 8 diff.) resistor-programmable instrumentation ampli? er sample-and-hold circuit complete with mos hold capacitor 10 volt buffered reference 12-bit a/d converter with three-state outputs and control logic ch0 hi /ch0 ch1 hi /ch1 ch2 hi /ch2 ch3 hi /ch3 ch4 hi /ch4 ch5 hi /ch5 ch6 hi /ch6 ch7 hi /ch7 ch0 lo /ch8 ch1 lo /ch9 ch2 lo /ch10 ch3 lo /ch11 ch4 lo /ch12 ch5 lo /ch13 ch6 lo /ch14 ch7 lo /ch15 4 3 2 1 62 61 60 59 58 57 56 55 54 53 52 51 11 10 12 15 17 16 39 3 8 37 40 9 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 7 bit 1 (msb) bit 2 bit 3 bit 4 en (1-4) bit 5 bit 6 bit 7 bit 8 en (5-8) bit 9 bit 10 bit 11 bit 12 (lsb) en (9-12) eoc a1 mux address out rdelay ana sig com 45 clear 36 20 C15v supply mux enable (hold) i/a 16 channel single ended or 8 channel differential 12-bit a/d converter s/h three state three state three state analog multiplexer control logic mux address register (start) 6 8 19 14 1 3 4 1 44 42 4 3 18 a2 a4 a8 strobe load ra1 ra2 ra4 ra8 mux address in a na pwr com +5v supply dig com 47 48 50 49 5 46 amp in hi amp in lo rgain hi rgain lo ana sig com ana sig com s/h out +10v ref out bipolar input gain adjust offset adjus t three state output data (buffered) +15v supply hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 1 of 8
functional specifications (the following speci? cations apply over the operating temperature range and power supply range unless otherwise indicated.) absolute maximum ratings parameters min. typ. max. units +15v supply (pin 43) C0.5 +18 volts C15v supply (pin 44) +0.5 C18 volts +5v supply (pin 18) C0.5 +7 volts analog inputs C35 +35 volts digital inputs C0.5 +7 volts thermal resistances: junction-case 15 c/watt case-ambient 15 c/watt junction-ambient 30 c/watt lead temp. (10 seconds) 300 c analog inputs min. typ. max. units signal range, unipolar gain = 1 0 +10 volts gain = 200 +50 mv signal range, bipolar gain = 1 C10 +10 volts gain = 200 C50 +50 mv input gain equation gain = 1 + (20k/rgain) gain equation error 0.1 % instrumentation ampli? er input impedance 10 8 10 12 ohms input bias current: +25c 250 pa C55 to +125c doubles every 10c input offset current: +25c 1 na C55 to +125c doubles every 10c multiplexer channel on resistance 2 k channel off input leakage 30 pa channel off output leakage 1 na channel on leakage 100 pa input capacitance hdas-16, channel on 100 pf hdas-8, channel on 50 pf +25c, channel off 5 pf input offset voltage gain = 1, +25c 2 mv C55 to +125c (max.) (3ppm/c x gain) 20ppm/c gain = 200, +25c 100 mv C55 to +125c (max.) (3ppm/c x gain) 20ppm/c common mode range 10 volts cmrr, gain = 1, at 60hz 70 82 db input voltage noise, gain = 1 (referred to input) 150 200 vrms channel crosstalk C80 db performance resolution 12 bits integral nonlinearity 0 to +70c 1 lsb C55 to +125c 1 lsb differential nonlinearity 0 to +70c 1 lsb C55 to +125c 1 lsb no missing codes over the operating temperature range performance (cont.) min. typ. max. units unipolar zero error +25c 0.1 %fsr C55 to +125c 0.3 %fsr bipolar zero error +25c 0.1 %fsr C55 to +125c 0.3 %fsr bipolar offset error +25c 0.1 %fsr C55 to +125c 0.3 %fsr gain error +25c 0.2 % C55 to +125c 0.3 % dynamic characteristics acquisition time, gain = 1 +25c 9 10 s C55 to +125c 15 s aperture delay time 500 ns aperture uncertainty 1 ns s/h droop rate 1 v/s feedthrough 0.01 % a/d conversion time +25c 6 8 s C55 to +125c 10 s throughput rate +25c 50 66 khz C55 to +125c 33 khz digital inputs logic levels (pins 8, 13C16, 19C21, 26, 31) logic 1 +2.0 +5.5 volts logic 0 0 +0.8 volts (pin 5) logic 1 +4.0 +5.5 volts logic 0 0 +0.8 volts logic loading (pins 5, 8, 13C16, 19C21, 26, 31) logic 1 10 a logic 0 10 a multiplexer address set-uptime 20 ns enable to data valid delay 20 30 ns strobe 40 n outputs logic levels (output data) logic 1 +2.4 volts logic 1 (pin 7) +2.5 volts logic 0 +0.4 volts (pins 9, 10, 11, and 12) logic 1 +2.5 volts logic 0 +0.4 volts logic loading logic 1 C400 a logic 0 +4 ma internal reference: voltage, +25c +9.99 +10.00 +10.01 volts drift 20 ppm/c external current 1 ma output data coding straight binary (unipolar) or offset binary (bipolar) hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 2 of 8
*same as hdas-16 caution: pins 49 and 50 do not have overvoltage protection; therefore, protected multiplexers, such as mpss mx-1606 and mx-808 are recommended. see the general operation description. technical notes 1. input channels are protected to 20 volts beyond the powersupplies. all digital output pins have one second short-circuit protection. 2. to retain high system throughput rates while digitizing low-level signals, apply external high-gain ampli? ers foreach channel. mpss am-551 is suggested for such ampli? er-per-channel applications. 3. the hdas devices have self-starting circuits for free-running sequential operation. if, however, in a power-upcondition the supply voltage slew rate is less than 3v per microsecond, the free running state might not be initial- ized. apply a negative pulse to the strobe, to eliminate this condition. 4. for unipolar operation, connect bipolar input (pin 38) to s/h out (pin 39). for bipolar operation, connect bipolar input (pin 38) to +10v reference out (pin 40). 5. rdelay may be a standard value 5% carbon composition or ? lm-type resistor. 6. rgain must be very accurate with low temperature coef? cients. if neces- sary, fabricate the gain resistor from a precision metal-? lm type in series with a low value trim resistor or potentiometer. the total resistor tempera- ture coef? cient must be no greater than 10ppm/c. 7. analog signal common, power common and digital common are connected internally. for optimal performance, tie all ground pins (17, 41, 42, 45, 46) directly to a large analog ground plane beneath the package. 8. for hdas-16, tie pin 50 to a signal source common if possible. otherwise tie pin 50 to pin 41 (ana sig com). power requirements min. typ. max. units power supply ranges +15v supply +14.25 +15.0 +15.75 volts C15v supply C14.25 C15.0 C15.75 volts +5v supply +4.75 +5.0 +5.25 volts power supply currents +15v supply +33 ma C15v supply C30 ma +5v suppy +15 ma power dissipation 1.25 watts physical/environmental operating temp. range, case mc models 0 +70 c mm/883 models C55 +125 c storage temperature range C65 +150 c weight 1.4 ounces (39.7 grams) package type 62-pin cermanic dip footnotes: analog inputs will withstand 35v with power on. if the power is off, the maximum safe input (no damage) is 20v. the gain equation error is guaranteed before external trimming and applies at gains less than 50. this error increases at gains over 50. adjustable to zero. strobe pulse width must be less than eoc period to achieve maximum throughput rate. pin no. hdas-16 hdas-8 1 ch3 in ch3 high in 2 ch2 in ch2 high in 3 ch1 in ch1 high in 4 ch0 in ch0 high in 5 mux enable * 6 rdelay * 7 eoc * 8 strobe * 9 a8 multiplexer * 10 a4 address * 11 a2 out * 12 a1 * 13 ra8 multiplexer * 14 ra4 address * 15 ra2 in * 16 ra1 * 17 digital common * 18 +5v supply * 19 load * 20 clear * 21 enable (bits 9C12) * 22 bit 12 (lsb) * 23 bit 11 * 24 bit 10 * 25 bit 9 * 26 enable (bits 5C8) * 27 bit 8 * 28 bit 7 * 29 bit 6 * 30 bit 5 * 31 enable (bits 1C4) * 32 bit 4 * 33 bit 3 * 34 bit 2 * 35 bit 1 (msb) * 36 gain adjust * 37 offset adjust * 38 bipolar input * 39 sample/hold out * 40 +10v reference out * 41 analog signal common * 42 analog power common * 43 +15v supply 44 C15v supply * 45 analog signal common * 46 analog signal common * 47 rgain low * 48 rgain high * 49 amp. in high * 50 amp. in low * 51 ch15 in ch7 low in 52 ch14 in ch6 low in 53 ch13 in ch5 low in 54 ch12 in ch4 low in 55 ch11 in ch3 low in 56 ch10 in ch2 low in 57 ch9 in ch1 low in 58 ch8 in ch0 low in 59 ch7 in ch7 high in 60 ch6 in ch6 high in 61 ch5 in ch5 high in 62 ch4 in ch4 high in hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 3 of 8
figure 2. external adjustment general operation the hdas devices accept either 16 single-ended or 8 differential input signals. for single-ended circuits, the amp inlow (pin 50) input to the instrumentation ampli? er must terminate at analog signal common (pin 41). for differential circuits, both the high and low signal inputs must terminate externally for each channel. tie unused channels to the analog signal common (pin 41). to obtain additional channels, connect external multiplexers to the amp in high (pin 49) and amp in low (pin 50). using this scheme, the hdas-16 can provide 32 single-ended expansion channels while the hdas-8 can provide up to 16 differential expansion channels. mpss mx series multiplexers are recommended. gain adjust 36 +15vdc offset adjust 20k 20k 37 C15vdc calibration procedures 1. offset and gain adjustments are made by connecting two 20k trim potenti- ometers as shown in figure 2. 2. connect a precision voltage source to pin 4 (ch0 in). if the hdas-8 is used, connect pin 58 (ch0 low in) to analog ground. ground pin 20 (clear) and momentarily short pin8 (strobe). trigger the a/d by connecting pin 7 (eoc) to pin 8 (strobe). select proper value for rgain and rdelay by referring to table 3. 3. adjust the precision voltage source to the value shown in table 2 for the unipolar zero adjustment (zero + 1/2lsb)or the bipolar offset adjustment (Cfs + 1/2lsb). adjust the offset trim potentiometer so that the output code ? ickers equally between 0000 0000 0000 and 0000 0000 0001. 4. change the output of the precision voltage source to the value shown in table 2 for the unipolar or bipolar gain adjustment (+fs C 1 1/2lsb). adjust the gain trim potentiometer so that the output ? ickers equally between 1111 1111 1110 and 1111 1111 1111. table 1. description of pin functions table 2. calibration table function logic state description digital inputs strobe 1 to 0 initiates acquisition and conversion of analog signal load 0 random address mode initiated on falling edge of strobe 1 sequential address mode clear 0 allows next strobe pulse to reset multiplexer address to ch0 overrid- ing load command mux enable 0 disables internal multiplexer 1 enables internal multiplexer mux address in selects channel for random address mode 8, 4, 2, 1 natural binary coding digital outputs eoc (status) 0 conversion complete 1 conversion in process enable (1C4) 0 enables three-state outputs bits 1-4 1 disables three-state outputs bits 1-4 enable (5C8) 0 enables three-state outputs bits 5-8 1 disables three-state outputs bits 5-8 enable (9C12) 0 enables three-state outputs bits 9-12 1 disables three-state outputs bits 9-12 mux address out output of multiplexer address register 8, 4, 2, 1 natural binary coding analog inputs description channel inputs limit voltage to 20v beyond power supplies bipolar input for unipolar operation, connect to pin 39 (s/h out). for bipolar operation, connect to in 40 (+10v out) amp. in low amp. in high these pins are direct inputs to the instrumentation ampli? er for external channel expansion beyond 16se or 8d channels. analog outputs s/h out sample/hold output +10v reference out buffered +10v reference output adjustment pins analog signal common low level analog signal return gain adjustment external gain adjustment. see calibration instructions. offset adjustment external offset adjustment. see calibration instructions. rgain optional gain selection point. factory adjusted for g = 1 when left open. rdelay optional acquisition time adjustment when connected to +5v. factory adjusted for 9s. must be connected to +5v either directly or through a resistor. unipolar range adjust input voltage 0 to +5v zero gain +0.6mv +4.9982v 0 to +10v zero gain +1.2mv +9.9963v bipolar range 2.5v offset gain C2.4994v +2.4982v 5v offset gain C4.9988v +4.9963v 10v offset gain C9.9976v +9.9927v hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 4 of 8
the acquisition time is the amount of time the multiplexer, instrumenta- tion ampli? er, and sample/hold require to settle within a speci? ed range of accuracy after strobe (pin 8)goes low. the acquisition time period can be observed by measuring how long eoc is low after the falling edge of strobe (see figure 4). for higher gains, increase the acquisition time. do this by con- necting a resistor from rdelay (pin 6) to +5v (pin 18). an external resistor, rgain, can be added to increase the gain value. the gain is equal to 1 without an rgain resistor. table 3 refers to the appropriate rdelay and rgain resis- tors required for various gains. the hdas devices enter the hold mode and are ready for conversion as soon as the one-shot (controling acquisition time) times out. an internal clock is gated on, and a start-convert pulse is sent to the 12-bit a/d converter, driving the eoc output high.the hdas devices can be con? gured for either bipolar or unipolar operation (see table 2). the conversion is complete within a maximum of 10 microseconds. the eoc now returns low, the data is valid and sent to the three-state output buffers.the sample/hold ampli? er is now ready to acquire new data.the next falling edge of the strobe pulse repeats the process for the next conversion. multiplexer addressing the hdas devices can be con? gured in either random orsequential address- ing modes. refer to table 5 and the subsequent descriptions. the number of channels sequentially addressed can be truncated using the mux address out(pins 9, 10, 11 and 12) and appropriate decoding circuitry forthe highest channel desired. the decoding circuit can drive the clear (pin 20) function low to reset the addressing to channel 0. pin on channel mux address 5 13 14 15 16 mux enable ra8 ra4 ra2 ra1 0 x x x x none hdas-8 (3-bit address) 1 0 0 0 0 0 1 0 0 0 1 1 1 0 0 1 0 2 1 0 0 1 1 3 1 0 1 0 0 4 1 0 1 0 1 5 1 0 1 1 0 6 1 0 1 1 1 7 1 1 0 0 0 8 hdas-16 (4-bit address) 1 1 0 0 1 9 1 1 0 1 0 10 1 1 0 1 1 11 1 1 1 0 0 12 1 1 1 0 1 13 1 1 1 1 0 14 1 1 1 1 1 15 table 3. input range parameters (typical) input range gain rgain ( ) rdelay ( ) throughput system accuracy (% of fsr) 10v 1 open 0 (short) 66.6khz 0.009 5v 2 20.0k 0 (short) 66.6khz 0.009 2.5v 4 6.667k 0 (short) 66.6khz 0.009 1v 10 2.222k 0 (short) 66.6khz 0.009 200mv 50 408.2 7k 40.0khz 0.010 100mv 100 202.0 21k 25.6khz 0.011 50mv 200 100.5 51k 14.5khz 0.016 notes the analog input range to the a/d converter is 0 to +10v for unipolar signals and 10v for bipolar signals. full scale can be accommodated for analog signal ranges of 50mv to 10v. for gains between 1 and 10, rdelay (pin 6) must be shorted to +5v (pin 18). throughput period equals acquisition and settling delay, plus a/d con- version period (10 microseconds maximum). rgain () = 20,000 rdelay () = [total acquisition delay (s) x 1000] C 9000 (gain C 1) table 5. mux channel addressing table 4. output coding unipolar straight binary input 0 to +10v 0 to +5v msb lsb +fs C 1lsb +9.9976 +4.9988 1111 1111 1111 +1/2fs +5.0000 +2.5000 1000 0000 0000 +1lsb +0.0024 +0.0012 0000 0000 0001 zero 0.0000 0.0000 0000 0000 0000 bipolar offset binary* input 10v 5v msb lsb +fs C 1lsb +9.9951 +4.9976 1111 1111 1111 +1/2fs +5.0000 +2.5000 1100 0000 0000 +1lsb +0.0049 +0.0024 1000 0000 0001 zero 0.0000 0.0000 1000 0000 0000 Cfs + 1lsb C9.9951 C4.9976 0000 0000 0001 Cfs C10.000 C5.0000 0000 0000 0000 * for 2s complement coding, add an inverter to the msb line. hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 5 of 8
tents of the address counter to be incremented by one, followed by an a/d conversion in 9 microseconds. input voltage protection as shown in figure 3, the multiplexer has reversed biased diodes which protect the input channels from being damaged by overvoltage signals. the hdas input channels areprotected up to 20v beyond the supplies and can be increasedby adding series resistors (ri) to each channel. the input resistor must limit the current ? owing through the protection diodes to 10ma. the value of ri for a speci? c voltage protection range (vp) can be calculated by the following formula: vp = (rsignal + ri + r on ) (10ma)where r on = 2k note: increased input series resistance will increase multiplexer settling time signi? cantly. figure 3. multiplexer equivalent circuit figure 4. hdas timing diagram strobe load 40nsec min. eoc clear ra8 ra4 ra2 ra1 a8 a2 a1 a4 ch0 data valid 40nsec min. acquisition ch0 conversion ch0 acquisition ch1 conversion ch1 9sec typ. 6 sec typ. external strobe pulse ch12 data valid acquisition ch12 conversion ch12 40nsec min. 40nsec min. ch12 selected t 20nsec min. ch0 addressed mode clear ch1 addressed ch2 addressed ch12 addressed sequential (eoc tied to strobe) random may change or don't care code t 2 t , 1 t 1 t 2 50nsec chn input 1k 1k r2 r1 +15v C15v 100pf 10pf ri r signal signal ~ inst. amp. random addressing set pin 19 (load) to logic 0. the next falling edge of strobe will load the mux channel address present on pin 13 to pin 16. digital address inputs must be stable 20ns before andafter falling edge of the strobe pulse. free running sequential addressing set pin 19 (load) and pin 20 (clear) to logic 1 or leave open. connect pin 7 (eoc) to pin 8 (strobe). the fallingedge of eoc will increment channel address. this means thatwhen the eoc is low, the digital output data is valid for theprevious channel (chn C 1) rather than the channel indicated on mux address output. the hdas will continually scan all channels. example: ch4 has been addressed and a conversion takes place. the eoc goes low. that channels (ch4s) data becomes valid, but mux address output is now ch5. triggered sequential addressing set pin 19 (load) and pin 20 (clear) to logic 1 or leaveopen. apply a falling edge trigger pulse to pin 8 (strobe).this negative transition causes the con- hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 6 of 8
mechnical dimensions inches (mm) 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 2.325 (59.055) 0.150 (3.810) 1.100 (27.940) 1.415 max. (35.94) 0.150 (3.810) 0.200 max. (5.080) 0.100 typ. (2.540) 2.00 0.008 (50.800) 0.235 max. (5.969) 0.190 max. (4.826) 0.020 0.002 (0.508) 0.040 (1.016) 0.150 (3.810) seating plane 0.025 0.010 (0.635) 1.100 0.008 (27.940) 0.150 (3.810) 1 21 32 52 62 2.150 ref 1.250 ref 1.220 .050 1.000 1.000 .100 typ .900 .450 .100 typ ref .050 ref ref .020 .100 .010 ref c l c l 2.120 .100 62x .050 2.30 ref 62x 1.40 ref dip package smt package hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 md a_hdas-16/8.b05 page 7 of 8
iso 9001 iso 9001 regi s tered ordering information model number operating temperature package rohs compliant hdas-16mc 0 to 70c dip no HDAS-16MM -55 to +125c dip no hdas-16/883 -55 to +125c dip no hdas-16gc 0 to 70c smt no hdas-16gm -55 to +125c smt no hdas-16g/883 -55 to +125c smt no hdas-16mc-c 0 to 70c dip yes HDAS-16MM-c -55 to +125c dip yes hdas-16/883-c -55 to +125c dip yes hdas-16gc-c 0 to 70c smt yes hdas-16gm-c -55 to +125c smt yes hdas-16g/883-c -55 to +125c smt yes hdas-8mc 0 to 70c dip no hdas-8mm -55 to +125c dip no hdas-8/883 -55 to +125c dip no hdas-8gc 0 to 70c smt no hdas-8gm -55 to +125c smt no hdas-8g/883 -55 to +125c smt no hdas-8mc-c 0 to 70c dip yes hdas-8mm-c -55 to +125c dip yes hdas-8/883-c -55 to +125c dip yes hdas-8gc-c 0 to 70c smt yes hdas-8gm-c -55 to +125c smt yes hdas-8g/883-c -55 to +125c smt yes receptacle for pc board mounting can be ordered through amp inc., part #3-331272-4 (component lead spring socket), 62 required. contact datel for mil-std-883 product speci? cations. hdas-16, hdas-8 12-bit, 50khz, complete data acquisition systems . makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. the descriptions contained her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are subject to change without notice. www.datel.com ? e-mail: help@datel.com ?? datel 11 cabot boulevard, mans? eld, ma 02048-1151 usa itar and iso 9001/14001 registered 01 apr 2011 md a_hdas-16/8.b05 page 8 of 8
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