參數(shù)資料
型號(hào): RFHCS362AG
廠商: Microchip Technology Inc.
英文描述: Code Hopping Encoder with UHF ASK/FSK Transmitter
中文描述: 跳碼編碼器的超高頻ASK / FSK發(fā)射器
文件頁(yè)數(shù): 30/60頁(yè)
文件大?。?/td> 502K
代理商: RFHCS362AG
rfHCS362G/362F
DS41189A-page 30
Preliminary
2002 Microchip Technology Inc.
6.3.1
CRYSTAL OSCILLATOR ASK
OPERATION
The rfHCS362G/362F crystal oscillator can be config-
ured for ASK operation. Figure 6-1 shows an example
ASK circuit.
Capacitor C1 trims the crystal load capacitance to the
desired circuit load capacitance and places the crystal
on the desired frequency.
FIGURE 6-1:
EXAMPLE ASK EXTERNAL
CRYSTAL CIRCUIT
TABLE 6-2:
XTAL OSC APPROXIMATE FREQ. VS. CAPACITANCE (ASK MODE)
(1)
XTAL
rfHCS362G/
362F
X1
C1
C1
Predicted Frequency
(MHz)
PPM from 13.55 MHz
Transmit Frequency (MHz)
(32 * f
XTAL
)
22 pF
39 pF
100 pF
150 pF
470 pF
1000 pF
13.551438
13.550563
13.549844
13.549672
13.549548
13.549344
+106
+42
-12
-24
-33
-48
433.646
433.618
433.595
433.5895
433.5856
433.579
Note 1:
Standard Operating Conditions (unless otherwise stated) T
A
= 25°C, RF
EN
= 1, V
DDRF
= 3V,
f
XTAL
= 13.55 MHz
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RFHCS362F 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder with UHF ASK/FSK Transmitter
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RFHCS362G 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder with UHF ASK/FSK Transmitter
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