fixed frequency d45 series sinewave oscillator 1784 chessie lane, ottawa, il 61350 ? tel: 800/252-7074, 815/434-7800 ? fax: 815/434-8176 e-mail: sales@freqdev .com w eb address: http://www .freqdev .com description the d45 series are fixed frequency sinewave oscil- lators that deliver a single phase, high purity sinu- soidal output. these fully finished devices can be user specified to operate to any frequency between 100 hz and 50.0 khz. each d45 model includes provisions for the user to adjust the output amplitude over a 1 to 20 vp-p range by external resistive or voltage programming. over the full output range, total harmonic distortion is 0.1% to 0.3% based on frequency , while the peak-to-peak amplitude stability of any fixed level selected is 0.002 db/ c. features/benefits: stable high purity sinewave output. compact 1.8"l x 0.8"w x 0.3"h minimizes board space requirements. adjustable output amplitude for applications requiring discrete or continuous output control. plug-in ready-to-use, reducing engineering design and manufacturing cycle time. applications reference oscillator airborne equipment mobile equipment t est apparatus t elemetry systems distortion t esting 1
fixed frequency d45 series sinewave oscillator 1784 chessie lane, ottawa, il 61350 ? tel: 800/252-7074, 815/434-7800 ? fax: 815/434-8176 e-mail: sales@freqdev.com web address: http://www.freqdev.com 2 discrete resistive programming: the method shown in fig. 2(a) provides continuous control of the output amplitude. for both methods, equation 1 defines the value of r1 for the specific set of con- ditions. figure 2 v o = output voltage in v p-p v s = supply voltage continuous resistive programming: to determine the value of potentiometer r1 in fig. 2(b), simply insert the appropriate values into equation 1. suppose for example, the required output ampli- tude range is 1 to 10vp-p and the positive power supply is +vs = 15 vdc. at maximum output voltage (10v p-p) equation 1 becomes voltage programmable amplitude: the output amplitude of the d45 can be voltage controlled by applying dc programming voltage v t3 to pin t3. the output response is found from equation 2, below: where vo is the output voltage expressed in vp-p, and v t3 is the dc control voltage applied to pin t3. fixed frequency operation the output signal frequency of each d45 series sinewave oscillator is factory calibrated to within 1% of the user-specified value. independent of frequency setting, the output amplitude is preset to 20v p-p. to put the oscillator into operation, simply connect the power supply common, voltages (vs), and ground pin t2. pin t2 must be connected to ground in this mode of operation. fine frequency adjustment (5%) for applications requiring a more accurate frequen- cy setting, disconnect pin t2 from ground. connect a cermet potentiometer as shown in fig. 1 for a 5% frequency adjustment range. figure 1 amplitude adjustment (1 to 20v p-p) for applications requiring either variable or lower level output signals, a single resistor or a dc control voltage can externally program the d45 output amplitude to any value between 1 and 20v p-p. warning: adjusting for outputs below 1vp-p will cause loss of the output signal. t1 500 ohm gnd cermet t3 r1 gnd metal film (a) (b) t3 gnd cermet 450v o r1(k ? )= 4v s -3v o equation 1 450 (10) r1(k ? )= 4(15)-3(10) for potentiometer r1 = 150k ? . v o v t3 = 2 equation 2
d45 series pin-out and package data ordering information specifications (25 c and vs 15 vdc) 1784 chessie lane, ottawa, il 61350 ? tel: 800/252-7074, 815/434-7800 ? fax: 815/434-8176 e-mail: sales@freqdev .com w eb address: http://www .freqdev .com w e hope the information given here will be helpful. the information is based on data and our best knowledge, and we consider t he information to be true and accurate. please read all statements, recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. w e a ssume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyri ght. pr-00d45-04 3 oscillation frequency (fo) range 100 hz to 50.0 khz t olerance 1 1 % external adjustment range 5% frequency stability t emperature 0.02%/ c supply/output amplitude v ariation 0.01%/% output characteristics amplitude preset 20v p-p 1 % adjustment range 2 1 to 20v p-p stability vs. t emperature 3 0.002 db/ c stability vs. supply v oltage 4 0.1 db/% drive capacity output current @ 20v p-p 5 5ma pk output resistance @ 20v p-p <10 w distortion 6 harmonic 100 hz to 10.0 khz: 0.1% (-60 db) 10.1 khz to 25.0 khz: 0.2% (-53 db) 25.1 khz to 50.0 khz: 0.3% (-50.4 db) noise 50v rms dc power supply (vs) rated v oltage 15 vdc operating v oltage range 12 vdc to 18 vdc maximum safe v oltage 18 vdc quiescent current 8 ma typ 12 ma max. t emperature operating -2 0 to +70 c storage -25 to +85 c notes: 1. externally adjusted to zero. 2. all models can deliver 6v p-p into a 600 w load. 3. the amplitude stability of a resistively programmed unit is directly propor- tional to the external programming resistor temperature coef ficient. 4. the amplitude stability of a voltage programmed unit having the program- ming dc voltage applied to pin t3 is 0.1db/%v t3. 5. the output is short circuit protected. 6. distortion is primarily third harmonic. specification is for resistive loading. 7. how to specify oscillation frequency: oscillation frequencies are specified by attaching a three-digit frequency designator to the basic model number . oscillation frequencies can range from 100 hz to 50.0 khz. d45-849 hz oscillation frequency 7 e.g., 849 hz 25.0 khz 50.0 khz ordering information terminal key v out signal output t1 fine frequency adjust t2 frequency adjust enable* t3 output amplitude adjust +v s power supply v oltage, positive gnd ground -v s supply v oltage, negative *must be connected to ground when fine frequency adjustment is not required. s i d e v i e w f r o n t v i e w b o t t o m v i e w 0 . 0 2 5 " ( d i a ) 1 . 8 0 " ( m a x ) 0 . 8 0 " ( m a x ) 0 . 1 5 " ( m i n ) 0 . 3 0 " ( m a x ) 0 . 8 0 " 0 . 7 0 " 0 . 1 0 " 0 . 0 0 " 0 . 0 0 " 0 . 2 0 " 0 . 8 0 " 0 . 4 0 " 1 . 5 0 " 1 . 6 0 " 1 . 8 0 " t 3 t 2 g n d o u t a l l d i m e n s i o n s a r e i n i n c h e s a l l c a s e d i m e n s i o n s 0 . 0 1 " 0 . 1 0 " ( t y p ) - v s 1 . 1 0 " + v s 1 . 3 0 " t 1 d 4 5 p a c k a g e o u t l i n e
|
