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CPC5604ATR датащи(PDF) 20 Page - Clare, Inc. |
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CPC5604ATR датащи(HTML) 20 Page - Clare, Inc. |
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20 / 33 page ![]() www.clare.com 20 CPC5604 XXX Differential and Single Ended Mode The LiteLinkTM is designed to support either differential or single ended signals on Tx and/or Rx pins. The deci- sion of which topology to use is based on the particular chipset being used to drive the LiteLinkTM. For example, most Lucent modem chips require both differential Receive and Transmit Frequency Response Figures 4A and 4C show the test circuits for receive and transmit frequency response respectively. Figures +3 +2.5 +2 +1.5 +1 +0.5 -0 -0.5 -1 -1.5 -2 -2.5 -3 -3.5 -4 -4.5 -5 Gain (dBm) 20 50 100 200 500 1K 2K 4K Frequency (Hz) Figure 4A Receive Frequency Response Setup LITELINK TM DAA Circuit TIP RING 500 10H 500 10H 48V + - 40mA Loop Current IN1 IN2 AP1 Audio Precision Generator -3dBm/ 20Hz-4kHz RX+ RX- Audio Precision System One Analyzer 100K 600 V V RX T/R INSERTION LOSS (dB) = 20 log (V / V ) RX T/R OH 470 uF receive and transmit ability, while most Rockwell devices require differential transmit and single ended receive. The LiteLinkTM supports a full 0dBm differential signal on its Tx inputs. 4B and 4D show the graphs for receive and transmit fre- quency response respectively. Figure 4B Receive Frequency Response Rx+ |
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