WGCE5039 Intel, WGCE5039 Datasheet - Page 18

• Manufacturer Part Number: WGCE5039
• Manufacturer: Intel

Specifications of WGCE5039

• Lead Free Status / Rohs Status: Compliant

The bandwidth of the baseband filter is given by the following expression:
where:
fbw
fxtal
BR
BF
The above equation can be re-arranged as follows
It is recommended that BR should be set so that
This sets the bandwidth resolution to approximately 200kHz
The value of BF can now be calculated from Equation 2 and rounded to the nearest integer:
Example
Conditions: fxtal = 10.111 MHz, fbw = 26.5 MHz
Choose BR = 10
BF = 132
The actual filter bandwidth is therefore given by:
fbw
BF
=
=
10.111
26.5
=
=
=
=
10
fbw
x
10.111
the filter bandwidth in MHz within the range 8 MHz to 43 MHz.
crystal oscillator frequency in MHz.
decimal value of the bits BR[4:0], range 1-31.
(BR = 0 is not allowed)
decimal value of the register bits BF[7:0], range 0 - 255.
=
5.088
BF
x
(
BR
132
=
⎡
⎢
⎣
fxtal
x
x
fbw x
+
5.088
10
1
)
x
−
1
5.088
5.088
=
x
1
132.35
(
BF
x
=
+
fxtal
26
1
BR
)
.
43
⎤
⎥
⎦
Equation 1
−
MHz
1
Equation 2
Intel Corporation
fxtal
BR
CE5039
18
is approximately 1 MHz
Data Sheet