TDA5204E1 Infineon Technologies, TDA5204E1 Datasheet - Page 25

• Manufacturer Part Number: TDA5204E1
• Description: ASK Single Conversion Receiver 390MHz
• Manufacturer: Infineon Technologies

Wireless Components
4.4 Quartz Frequency Calculation
The quartz frequency is calculated by using the following formula:
ƒ
with
Example:
Table 4-2
QU
Table 4-1
frequency range
quartz crystal
12.xx MHz
385...406MHz
406...428MHz
781...823MHz
803...844MHz
6.xx MHz
= (ƒ
range
RF
f
RF
± 10.7MHz) / r
ƒ
+/-
ƒ
ƒ
r
RF
LO
QU
f
f
f
QU
QU
RF
=390MHz
....
...
....
....
....
=(390MHz+10.7MHz) / 64 = 6.2609375MHz
=(390MHz+10.7MHz) / 32 = 12.521875MHz
CSEL
Pin16
open
GND
high-side
injected
4 - 6
X
X
receive frequency
high-side / low-side injected
local oscillator (PLL) frequency (ƒ
quartz oscillator frequency
ratio of local oscillator (PLL) frequency and quartz
frequency as shown in the subsequent table.
low-side
injected
(1),
X
X
Table 4-3
FSEL
open
open
GND
GND
FSEL
Pin11
open
open
GND
GND
Specification, January 2001
CSEL
open
GND
open
GND
RF
TDA 5204 E1
± 10.7)
Applications
(f
preliminary
Ratio r
LO
128
64
32
64
/f
QU
)