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參數(shù)資料
| 型號： | TEA5760UK/N1,023 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA25 |
| 封裝： | 3 X 2.80 MM, 0.60 MM HEIGHT, WLCSP-25 |
| 文件頁數(shù)： | 35/37頁 |
| 文件大小： | 209K |
| 代理商： | TEA5760UK/N1,023 |
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TEA5760UK_1
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 14 December 2006
6 of 36
NXP Semiconductors
TEA5760UK
Single chip FM stereo radio
where:
NDEC = decimal value of PLL word
fRF = wanted tuning frequency (Hz)
fIF = intermediate frequency (Hz): 225 kHz
fref = reference frequency (Hz): 32.768 kHz
Example for receiving a channel at 100.1 MHz:
The result must always be rounded to the lowest integer value. If rounded down to the
lowest integer value of NDEC = 12246, the PLL word becomes 2FD6h.
Via the control interface this value can be written to register FRQSET and the
TEA5760UK will then start an autonomous search beginning at this frequency or go to a
preset channel at this frequency. When the application is built according the application
diagram (see Figure 11) and with the preferred components, the tuning system will settle
to the new frequency within 40 ms.
The PLL is triggered by writing one of the following bytes: FRQSETMSB, FRQSETLSB,
TNCTRL1, TNCTRL2, TESTBITS and TESTMODE.
Accurate validation of the PLL locking onto the new frequency can take 40 ms. Bit LD in
register TUNCHK (see Table 18) is set when a lock is detected.
6.6 Band limits
The TEA5760UK can be switched to the Japanese FM band or the US/Europe FM band.
With bit BLIM in register TNCTRL (see Table 13) set to logic 0 it enables the US/European
FM band (87.5 MHz to 108 MHz), while setting bit BLIM to logic 1 enables the Japanese
FM band (76 MHz to 90 MHz).
6.7 RF AGC
The RF AGC prevents overloading and limits the amount of intermodulation products
created by strong adjacent channels. The default setting for the RF AGC is on and it can
be turned off via the control interface. The TEA5760UK also has an inband AGC to
prevent overloading by the wanted channel itself. The inband AGC is always on.
6.8 IF lter
Fully integrated IF lter with a center frequency of 225 kHz.
6.9 FM demodulator
Fully integrated FM quadrature demodulator.
N
DEC
4
100.e6
225e3
+
()
×
[]
32768
---------------------------------------------------------
12246.704
==
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