xr215a Exar Corporation, xr215a Datasheet
xr215a
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xr215a Summary of contents
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... It is especially well suited for FM or FSK demodulation, frequency synthesis and tracking filter ORDERING INFORMATION Part No. XR-215ACP XR-215ACD Rev. 1.01 1996 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 TM APPLICATIONS FM Demodulation Frequency Synthesis FSK Coding/Decoding (MODEM) Tracking Filters Signal Conditioning Tone Decoding ...
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XR-215A COMP 7 1 OPAMP 4 PHCP1 6 PHCP2 5 BIAS 12 VSI 11 VGC 10 RGS 13 TCI1 14 TCI2 Rev. 1. Amp Phase Comparator VCO Figure 1. XR-215A Block Diagram 2 ...
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PIN CONFIGURATION OPAMP 1 PCO1 2 PCO2 3 PHCP1 4 BIAS 5 PHCP2 6 COMP 7 OPAMPO 8 16 Lead 300 Mil PDIP PIN DESCRIPTION Pin # Symbol Type Description 1 OPAMP I Operational Amplifier Input. 2 PCO1 O Phase ...
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XR-215A DC ELECTRICAL CHARACTERISTICS Test Conditions 12V (single supply (silver-mica closed Parameter GENERAL CHARACTERISTICS Supply Voltage Single Supply Split Supply Supply Current Upper Frequency ...
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DC ELECTRICAL CHARACTERISTICS Parameter SPECIAL APPLICATIONS A) FM Demodulation Test Conditions: Test circuit of Figure Detection Threshold Demodulated Output Amplitude Distortion (THD) AM Rejection Output Signal/Noise B) Tracking Filter Test Conditions: Test circuit of Figure 6 , ...
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XR-215A Figure 2. Equivalent Schematic Diagram SYSTEM DESCRIPTION The XR-215A monolithic PLL system consists of a balanced phase comparator, a highly stable voltage- controlled oscillator (VCO) and a high speed operational amplifier. The phase comparator outputs ...
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F Signal Input Sweep V S Input s 4 750 Figure 3. Test Circuit for Single Supply Operation Rev. 1.01 +12V 5K 5K 0 Phase ...
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XR-215A 0.1 F Signal Input 750 -6V Figure 4. Test Circuit for Split-Supply Operation Rev. 1.01 +6V 0 Phase 6 4 Comp. XR-215A 11 ...
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F FM Input 3K (50 Source) 750 Figure 5. Test Circuit for FM Demodulation Rev. 1.01 +12V 0 Phase Comp. XR-215A VCO 8 10 ...
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XR-215A 0.1 F Signal Input Rev. 1.01 +12V 5K 5K 0 Phase Comp. XR-215A VCO 10 Op Amp ...
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-800 Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...
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XR-215A VCO Timing Capacitor (Pins 13 and 14) The VCO free-running frequency inversely proportional to timing capacitor C o (See Figure 8. ) VCO Output (Pin 15) The VCO produces approximately a 2.5Vp-p output signal at this ...
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Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...
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XR-215A Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î 100 Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...
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Internal Bias T 1 1.3V Figure 12. Explanation of VCO Range-Select Controls Range-Select (Pin 10) The frequency range of the XR-215A can be extended by connecting an external resistor between pins 9 and X 10. With reference to ...
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XR-215A Amplifier Output (Pin 8) This pin is used as the output terminal for FM or FSK demodulation. The amplifier gain is determined by the external feedback resistor connected between pins 1 F and 8. Frequency response characteristics ...
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Figure 14. Linearized Model of a PLL as a Negative Feedback System Phase Comparator Gain K d The output voltage from the phase comparator per radian of phase difference at the phase comparator ...
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XR-215A Low-Pass Filter The low-pass filter section is formed by connecting an external capacitor or RC network across terminals 2 and 3. The low-pass filter components can be connected either between pins 2 and 3 or, from each pin to ...
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Cc FM Input Figure 16. Circuit Connection for FM Demodulation APPLICATIONS INFORMATION FM Demodulation Figure 16 shows the external circuit connections to the XR-215A for frequency-selective FM demodulation. The choice determined by the ...
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XR-215A Multi-Channel Demodulation The AC digital programming capability of the XR-215A allows a single circuit be time-shared or multiplexed between two information channels, and thereby selectively demodulate two separate carrier frequencies. Figure 19 shows a practical circuit configuration for time-multiplexing ...
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Channel 1 F =1MHz Channel 2 0 =1.1MHz Channel Select - ...
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XR-215A Demodulated Output Channel Select Pulse Figure 20. Demodulated Output Waveforms for Time-Multiplexed Operation FSK Demodulation Figure 21 contains a typical circuit connection for FSK demodulation. When the input frequency is shifted, corresponding to a data bit, the DC voltage ...
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FSK Input Figure 21. Circuit Connection for FSK Demodulation Rev. 1.01 +12V 5K 5K 0 ...
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XR-215A +5V Keying 0V Input R x Figure 22. Circuit Connection For FSK Generation Frequency Synthesis In frequency synthesis applications, a programmable counter or divide-by-N circuit is connected between the VCO output (pin 15) and one of the phase detector ...
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C c 20K Binary Range Select Rx (Optional) -5V Figure 23. Circuit Connection For Frequency Synthesis The circuit was designed to operate with commercially available monolithic programmable counter circuits using TTL logic, such as ...
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XR-215A Tracking Filter/Discriminator The wide tracking range of the XR-215A allows the system to track an input signal over a 3:1 frequency range, centered about the VCO free running frequency. The tracking range is maximum when the binary range- select ...
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The phase-comparator output voltage is a linear measure of the VCO frequency deviation from its free-running value. The amplifier section, therefore, can be used to provide a filtered and amplified version of the loop error voltage. In this case, the ...
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XR-215A Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î +3 Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...
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LEAD PLASTIC DUAL-IN-LINE Seating Plane L B SYMBOL Note: The control dimension is the inch column Rev. ...
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XR-215A 16 LEAD SMALL OUTLINE Seating Plane e SYMBOL Note: The control dimension is the millimeter column Rev. 1.01 (300 MIL JEDEC SOIC) Rev. 1. ...
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Rev. 1.01 Notes 31 XR-215A ...
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... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...