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| 型號： | TEA5764UK |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | FM radio + RDS |
| 中文描述： | FM, AUDIO SINGLE CHIP RECEIVER, PBGA34 |
| 封裝： | 4 X 4 MM, WLB-34 |
| 文件頁數(shù)： | 7/64頁 |
| 文件大小： | 287K |
| 代理商： | TEA5764UK |
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TEA5764HN_2
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 9 August 2005
7 of 64
Philips Semiconductors
TEA5764HN
FM radio + RDS
8.4 Crystal oscillator
The crystal oscillator can operate with a 32.768 kHz clock crystal. The oscillator can be
overridden via the FREFIN pin. When the FREFIN pin is used the oscillator is clocked
externally by a 32.768 kHz signal. Selection between a reference clock or a reference
crystal can be done via the I
2
C-bus. When a crystal is connected the FREFIN pin must be
left open-circuit, and when pin FREFIN is used a crystal may not be connected. It is not
possible to connect a crystal and apply a frequency via the FREFIN pin in the same
application.
The crystal oscillator generates the reference frequency for the following:
Reference frequency divider for synthesizer PLL
Timing for the IF counter
Timing for the pause detector
Free running frequency adjustment of the stereo decoder VCO
Centre frequency for adjustment of the IF filters
Clock frequency of the RDS/RBDS decoder
8.5 PLL tuning system
The PLL synthesizer tuning system is suitable to operate with a 32.768 kHz reference
frequency generated by the crystal oscillator or a reference clock of 32.768 kHz fed into
the TEA5764HN. To tune the radio to the required frequency requires the PLL word to be
calculated and then programmed to the register. The PLL word is 14 bits long; see
Table 20
and
Table 21
. Calculation of this 14-bit word can be done as follows.
Formula for high-side injection:
(1)
Formula for low-side injection:
(2)
where:
N
DEC
= decimal value of PLL word
f
RF
= wanted tuning frequency (Hz)
f
IF
= intermediate frequency of 225 kHz
f
ref
= the reference frequency of 32.768 kHz
Example for receiving a channel at 100.1 MHz:
(3)
N
DEC
4
--------------------------------------
f
f
ref
)
=
N
DEC
4
-------------------------------------
f
f
ref
)
=
N
DEC
------------------------------------------------------------------------
6
32768
3
)
12246.704
=
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA5764UK/N2,027 | 功能描述:調(diào)諧器 FM RADIO WITH RDS RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| TEA5764UK-G | 功能描述:調(diào)諧器 FM RADIO WITH RDS RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| TEA5766UK/N1,023 | 功能描述:調(diào)節(jié)器/解調(diào)器 FM RADIO + RDS RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TEA5766UK/N1,118 | 功能描述:調(diào)節(jié)器/解調(diào)器 FM RADIO + RDS RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TEA5766UK/N1/S21,0 | 功能描述:調(diào)諧器 FM RADIO + RDS RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
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