參數(shù)資料
型號(hào): TDA5204
廠商: INFINEON TECHNOLOGIES AG
英文描述: ASK Single Conversion Receiver 390MHz
中文描述: 調(diào)幅單一轉(zhuǎn)換接收390MHz
文件頁數(shù): 25/40頁
文件大?。?/td> 1241K
代理商: TDA5204
X
Applications
4 - 6
TDA 5204 E1
preliminary
Wireless Components
Specification, January 2001
4.4 Quartz Frequency Calculation
The quartz frequency is calculated by using the following formula:
QU
= (
RF
± 10.7MHz) / r
(1),
with
RF
+/-
....
receive frequency
...
high-side / low-side injected
LO
QU
r
....
local oscillator (PLL) frequency (
RF
± 10.7)
quartz oscillator frequency
....
....
ratio of local oscillator (PLL) frequency and quartz
frequency as shown in the subsequent table.
Example:
f
RF
=390MHz
f
QU
=(390MHz+10.7MHz) / 64 = 6.2609375MHz
f
QU
=(390MHz+10.7MHz) / 32 = 12.521875MHz
Table 4-1
frequency range
f
RF
high-side
injected
low-side
injected
FSEL
Pin11
385...406MHz
X
open
406...428MHz
X
open
781...823MHz
GND
803...844MHz
X
GND
Table 4-3
FSEL
CSEL
Ratio r
(f
LO
/f
QU
)
open
open
64
open
GND
32
GND
open
128
GND
GND
64
Table 4-2
quartz crystal
range
CSEL
Pin16
6.xx MHz
open
12.xx MHz
GND
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