 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
XR-2206D Datasheet(PDF) 11 Page - Exar Corporation |
|
||||||||||||||||||||||||||||||
XR-2206D Datasheet(HTML) 11 Page - Exar Corporation |
|
|
11 / 16 page  XR-2206 11 Rev. 1.03 With External Adjustment: The harmonic content of sinusoidal output can be reduced to -0.5% by additional adjustments as shown in Figure 12. The potentiometer, RA, adjusts the sine-shaping resistor, and RB provides the fine adjustment for the waveform symmetry. The adjustment procedure is as follows: 1. Set RB at midpoint and adjust RA for minimum distortion. 2. With RA set as above, adjust RB to further reduce distortion. Triangle Wave Generation The circuits of Figure 11 and Figure 12 can be converted to triangle wave generation, by simply open-circuiting Pin 13 and 14 (i.e., S1 open). Amplitude of the triangle is approximately twice the sine wave output. FSK Generation Figure 13 shows the circuit connection for sinusoidal FSK signal operation. Mark and space frequencies can be independently adjusted by the choice of timing resistors, R1 and R2; the output is phase-continuous during transitions. The keying signal is applied to Pin 9. The circuit can be converted to split-supply operation by simply replacing ground with V-. Pulse and Ramp Generation Figure 14 shows the circuit for pulse and ramp waveform generation. In this mode of operation, the FSK keying terminal (Pin 9) is shorted to the square-wave output (Pin 11), and the circuit automatically frequency-shift keys itself between two separate frequencies during the positive-going and negative-going output waveforms. The pulse width and duty cycle can be adjusted from 1% to 99% by the choice of R1 and R2. The values of R1 and R2 should be in the range of 1kW to 2MW. PRINCIPLES OF OPERATION Description of Controls Frequency of Operation: The frequency of oscillation, fo, is determined by the external timing capacitor, C, across Pin 5 and 6, and by the timing resistor, R, connected to either Pin 7 or 8. The frequency is given as: f 0 + 1 RC Hz and can be adjusted by varying either R or C. The recommended values of R, for a given frequency range, as shown in Figure 5. Temperature stability is optimum for 4k W < R < 200kW. Recommended values of C are from 1000pF to 100 mF. Frequency Sweep and Modulation: Frequency of oscillation is proportional to the total timing current, IT, drawn from Pin 7 or 8: f + 320 I T (mA) C( mF) Hz Timing terminals (Pin 7 or 8) are low-impedance points, and are internally biased at +3V, with respect to Pin 12. Frequency varies linearly with IT, over a wide range of current values, from 1 mA to 3mA. The frequency can be controlled by applying a control voltage, VC, to the activated timing pin as shown in Figure 10. The frequency of oscillation is related to VC as: f + 1 RC 1 ) R R C 1 – V C 3 Hz where VC is in volts. The voltage-to-frequency conversion gain, K, is given as: K + f V C + – 0.32 R CC Hz V CAUTION: For safety operation of the circuit, IT should be limited to 3mA. |
Similar Part No. - XR-2206D |
|
Similar Description - XR-2206D |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
