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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TLV320AIC21 датащи(PDF) 47 Page - Texas Instruments |
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TLV320AIC21 датащи(HTML) 47 Page - Texas Instruments |
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47 / 56 page  www.ti.com CallerID Interface 0-dB Gain, Typ. CIDI+ CIDI- Rx 365 k Ω Rx 365 k Ω Cx 470 pF Cx 470 pF To Telephone To RJ11 To Analog Crosspoint TLV320AIC20 VCOM VCOM TLV320AIC20, TLV320AIC21 TLV320AIC24, TLV320AIC25 TLV320AIC20K, TLV320AIC24K SLAS363D – MARCH 2002 – REVISED APRIL 2005 Layout and Grounding Guidelines for TLV320AIC2x (continued) The callerID amplifier interface to the telephone line is shown in (A). The value for Rx is 365 k Ω (E96 series, which has 1% tolerance). Cx is 470 pF (10% tolerance) of high-voltage rating. Voltage rating is decided based on the telecommunication standards of the country. The typical value is 1 kV. The callerID input can be used as a lower-performance line input. For this application, a larger value capacitor is required for Cx. A. Typical Application Circuit for CallerID Amplifiers Figure 37. Recommended Power-Supply Decoupling The recommended power-supply decoupling for the TLV320AIC2x is shown in Figure 38. Both high frequency and bulk decoupling capacitors are suggested. The high-frequency capacitors should be X7R type capacitors or better. A 1-µF ceramic capacitor should be used to decouple the digital power supply. 47 |
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