OSC-15801 synchro/resolver/inductosyn ? reference oscillator description the OSC-15801 is a quadrature power oscillator with two outputs that are 90 out of phase. these outputs provide both the reference and quad- rature signals, simultaneously, mak- ing the OSC-15801 ideally suited for inductosyn applications. the oscillator?s outputs are pin-pro- grammable for both frequency and amplitude. the output frequency can be programmed from 400 hz to 20 khz by simply connecting two exter- nal capacitors. the reference output voltage, 8.8 vrms at 20 khz, can be scaled down by connecting a single resistor. applications packaged in an 18-pin hermetic ddip, the OSC-15801 operates over a tem- perature range of -55c to +125c. this, combined with its small size and programmable output voltage and fre- quency capabilities, makes it an excellent choice for use in inductosyn applications. features quadrature reference output voltages for inductosyn applications programmable output frequency from 400 hz to 20 khz small 18-pin ddip scalable reference output -55c to +125c operating temperature range quad oscillator - + +15 vdc gnd -15 vdc pa out 30k pa in rext cext cext ref out c1 c2 gnd ref out -90? 30k c2 figure 1. OSC-15801 block diagram 1981, 1999 data device corporation ? inductosyn is a registered trademark of farrand controls corporation.
2 OSC-15801 operation programmable frequency output the output frequency of the OSC-15801 is programmable from 20 khz down to 400 hz. the frequency is programmed using two external equal value capacitors (see figure 2). the value of the capacitors (c ext ) is calculated as follows: c ext = (2,400,000/f) - 100 where: c ext is capacitance in picofarads, f is frequency in hertz. programmable reference voltage output the pa out (ref), pin 13, provides from 7.1 to 8.8 vrms, depending on the operating frequency. table 2 lists the pa out voltages at the (programmed) operating frequency. these volt- ages are the maximum voltages obtained at these frequencies, with the r ext = 0 ohms (pin 7 jumped to pin 3). to scale down the pa out voltage, an external resistor (r ext ) is connected between pins 3 and 7. the value of r ext is calculated as follows: r ext = 30 [(pa out/desired voltage) -1] where: r ext is in kohms, desired voltage is in vrms, pa out is dependent on frequency used. for example , to scale down pa out to 5 vrms at 10 khz, the value of r ext would be calculated as follows: r ext = 30 [(pa out/desired voltage) -1] r ext = 30 [(7.5/5) -1] r ext = 15k ? table 1. OSC-15801 specifications specifications apply over temperature range and power supply range. parameter units value frequency hz programmable from 400 to 20k outputs (note 1) pa out voltage continuous current protection ref voltage continuous current protection ref -90 voltage continuous current protection v rms ma rms v rms ma rms v rms ma rms 7.1 to 8.8 215 max momentary short circuit (1 sec. max.) 7.1 to 8.8 3 max momentary short circuit (5 sec. max.) (note 2) 3 max momentary short circuit (5 sec. max.) power supplies voltage current max voltage without damage vdc ma vdc ?5 ?% 10 max plus current load ?8 temperature range operating -10x -30x storage ? ? ? -55 to +125 0 to +70 -65 to +150 physical characteristics size package type weight in (mm) oz (gm) 1.0 x 0.8 x 0.2 (25.45 x 20.32 x 4.83) 18-pin ddip 0.4 (1) OSC-15801 +15 v -15 v pa out (ref) pa in rext cext cext ref out c1 c2 ref out +90 ? 13 15 16 18 11 10 3 7 6 c2 12 figure 2. programming resistor and capacitor connections notes: 1. output voltage tracks 15 v supply levels. 2. clipped sine wave for demodulator drive only, 10 vrms typ. table 2. pa out/frequency pa out frequency 8.8 vrms 7.5 vrms 7.1 vrms 20 khz 10 khz .4 khz * *pin 7. ref out is the unbuffered output of oscillator
3 0.190 max (4.83) 0.180 minimum (4.57) 0.018 0.002 (0.46 0.05) 8 eq. sp. @ 0.100 = 0.800 tol noncum (@ 2.54 = 20.32) 1.002 max (25.45) 0.800 max (20.32) 0.600 (15.24) 0.010 0.002 typ (0.25 0.05) 0.040 typ (1.02) 0.100 typ (2.54) 0.035 typ (0.89) top view side view 1 9 10 18 pin 1 index figure 3. OSC-15801 mechanical outline table 3. OSC-15801 pin functions pin name function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 nc nc pa i n nc nc c1 ref out nc nc c2 c2 gnd ref out -90 pa out nc -15 v gnd nc +15 v no connection no connection power amplifier inverting input no connection no connection capacitor connection (pin-programmable freq.) reference output no connection no connection capacitor connection (pin-programmable freq.) capacitor connection (pin-programmable freq.) -90 reference output signal power amplifier output no connection -15 vdc power supply voltage ground no connection +15 vdc power supply voltage notes: 1. dimensions shown are in inches (mm). 2. lead cluster shall be centralized within 0.010 (2.54) of outline dimensions. 3. pin material meets solderability requirements of mil-std-202e, method 208c. 4. pin numbers are for reference only.
4 h-11/99-1m the information in this data sheet is believed to be accurate; however, no responsibility is assumed by data device corporation for its use, and no license or rights are granted by implication or otherwise in con- nection therewith. specifications are subject to change without notice. 105 wilbur place, bohemia, new york 11716-2482 for technical support - 1-800-ddc-5757 ext. 7389 or 7413 headquarters - tel: (631) 567-5600 ext. 7389 or 7413, fax: (631) 567-7358 southeast - tel: (703) 450-7900, fax: (703) 450-6610 west coast - tel: (714) 895-9777, fax: (714) 895-4988 europe - tel: +44-(0)1635-811140, fax: +44-(0)1635-32264 asia/pacific - tel: +81-(0)3-3814-7688, fax: +81-(0)3-3814-7689 world wide web - http://www.ddc-web.com printed in the u.s.a. ordering information OSC-15801 -xx0x supplemental process requirements: s = pre-cap source inspection l = pull test q = pull test and pre-cap inspection k = one lot date code w = one lot date code and pre-cap source y = one lot date code and 100% pull test z = one lot date code, pre-cap source and 100% pull test blank = none of the above process requirements: 0 = standard ddc processing, no burn-in 1 = mil-prf-38534 compliant 2 = b* 3 = mil-prf-38534 compliant with pind testing 4 = mil-prf-38534 compliant with solder dip 5 = mil-prf-38534 compliant with pind testing and solder dip 6 = b* with pind testing 7 = b* with solder dip 8 = b* with pind testing and solder dip 9 = standard ddc processing with solder dip, no burn-in temperature grade/data requirements: 1 = -55 c to +125 c 2 = -40 c to +85 c 3 = 0 c to +70 c 4 = -55 c to +125 c with variables test data 5 = -40 c to +85 c with variables test data 8 = 0 c to +70 c with variables test data 1015, table 1 burn-in a 2001 constant acceleration c 1010 temperature cycle a and c 1014 seal 2009, 2010, 2017, and 2032 inspection condition(s) method(s) test mil-std-883 standard ddc processing *standard ddc processing with burn-in and full temperature test - see table below ilc data device corporation registered to iso 9001 file no. a5976
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