CC400 Chipcon, CC400 Datasheet - Page 15

• Manufacturer Part Number: CC400
• Description: Single Chip High Performance RF Reansceiver
• Manufacturer: Chipcon

Loop filter
The loop filter is a lead-lag type of filter.
The
components are done in the SmartRF
Studio software.
See Application Note AN012 “VCO fine
tuning for CC400 and CC900” for more
Blocking
Chipcon AS
-10
-10
-10
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
70
60
50
40
30
20
10
0
0
0
420
420
420
calculations
425
425
425
Item
C151
C161
430
430
430
Frequency
Frequency
Frequency
435
435
435
for
SmartRF
440
440
440
Table 3. Crystal oscillator component values.
the
445
445
445
C
TM
L
= 12 pF
CC400
15 pF
15 pF
loop
450
450
450
FM
CW
Requirement
FM
CW
Requirement
FM
CW
Requirement
filter
Datasheet (rev. 3.1) 2003-11-12
C
L
= 16 pF
SmartRF
22 pF
22 pF
detailed
CC400_CC900_Loop_Filter_1_0.xls,
available from Chipcon that will calculate
the loop filter components for a desired
bandwidth with different constants than
the default values in SmartRF Studio.
IF =60 kHz, Separation = 20 kHz. Data
rate = 1.2 kbit/s. Interfering signal is CW
(no modulation) or FM modulation.
IF =200 kHz, Separation = 40 kHz. Data
rate = 1.2 kbit/s. Interfering signal is CW
(no modulation) or FM modulation.
IF =455 kHz external, Separation = 12
kHz. Data rate = 1.2 kbit/s. Interfering
signal is CW (no modulation) or FM
modulation.
information.
C
L
= 22 pF
33 pF
33 pF
®
A
CC400
spreadsheet,
Page 15 of 27
is