mrf89xa Microchip Technology Inc., mrf89xa Datasheet - Page 123

• Manufacturer Part Number: mrf89xa
• Description: Ultra-low Power, Integrated Ism Band Sub-ghz Transceiver
• Manufacturer: Microchip Technology Inc.

5.4.7
FIGURE 5-17:
FIGURE 5-18:
© 2010 Microchip Technology Inc.
Note:
12.00
10.00
12.0
10.0
8.00
6.00
4.00
2.00
0.00
8.0
6.0
4.0
2.0
0.0
863
OUTPUT POWER FLATNESS
902
As noted inSection 4.3.1 “SAW Filter Plot”, the 869 MHz SAW filter does not cover the entire European 863-870 MHz frequency band
when used in a 50
MHz band, it is recommended that an appropriate SAW filter be implemented or that the SAW response is tuned by external matching.
The SAW filter ripple references are the insertion loss of each SAW at 869 MHz and 915 MHz.
904
P
P
OUT
OUT
864
906
Ω
FOR 869 MHz BAND OPERATION
FOR 915 MHz BAND OPERATION
environment. Therefore, the output power degradation at the lowest frequencies. For applications in the 863-860
908
865
910
912
Preliminary
866
Frequency [MHz]
P
Frequency [MHz]
P
OUT
OUT
914
SAW Ripple
SAW Ripple
916
867
918
920
868
922
924
869
MRF89XA
926
DS70622B-page 123
928
870
4.0
2.0
0.0
-2.0
-4.0
-6.0
-8.0
4.0
2.0
0.0
-2.0
-4.0
-6.0
-8.0