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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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TDA18271HD/C2 Datenblatt(PDF) 7 Page - NXP Semiconductors |
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TDA18271HD/C2 Datenblatt(HTML) 7 Page - NXP Semiconductors |
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7 / 70 page  TDA18271HD_4 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 04 — 19 May 2009 7 of 70 NXP Semiconductors TDA18271HD Silicon Tuner IC 8.3 Tuner outputs The tuner provides a slave tuner output (pin STO) and a loop-through output (pin LT). These outputs are used to transmit the antenna signal to other tuners. Each output has its own characteristics (see Table 58 and Table 59). 8.3.1 Loop-through output The gain between the antenna connector and the loop-through pin (pin LT) equals 0 dB. This pin can be connected to any consumer electronic equipment. 8.3.2 Slave tuner output In dual tuner applications the slave tuner output (pin STO) must be connected to the RF input of the slave tuner TDA18271HD. The gain between the antenna connector and the slave tuner output can change according to the input level. The slave tuner will automatically compensate for the gain change, using the MASTERSYNC and FREEZE signals. 8.4 Crystal input mode The TDA18271HD requires a 16 MHz crystal reference. The chosen crystal must withstand at least 100 µW drive level and an additional shunt capacitor with a typical value of 5.6 pF as shown in Figure 1 is also needed. The quartz references for which the performances are guaranteed are: • NDK NX5032 • Siward SX-5032 • TXC 9C series • Chungho Elcom HC49S profile Clock reference: • In Master mode, the clock reference must be provided by a 16 MHz crystal connected between pins XTALP and XTALN of the master tuner • In Slave mode, the clock reference must be provided by pins XTOUTP and XTOUTN of the tuner in Master mode to pins XTALP and XTALN of the tuner in Slave mode 8.5 Crystal output mode Pins XTOUTP and XTOUTN deliver a symmetrical sine waveform to drive the channel decoder and/or IF demodulator. The load on these outputs should be made similar to ensure optimum performances. If only one crystal output is used, the unused output should be loaded by an equivalent capacitance. |
Ähnliche Teilenummer - TDA18271HD/C2 |
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Ähnliche Beschreibung - TDA18271HD/C2 |
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