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MICRF405 Datasheet(PDF) 35 Page - Micrel Semiconductor

Part # MICRF405
Description  290MHz-980MHz ISM Band ASK / FSK Transmitter
PDF  46 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF405 Datasheet(HTML) 35 Page - Micrel Semiconductor

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Micrel
MICRF405
April 2006
35
M9999-041906
(408) 955-1690
PA2
PA1
PA0
State
0
0
0
21dB attenuation or PA off if PA_LDc_en=0
0
0
1
18dB attenuation
0
1
0
15dB attenuation
0
1
1
12dB attenuation
1
0
0
9dB attenuation
1
0
1
6dB attenuation
1
1
0
3dB attenuation
1
1
1
Max output
Table 21. Power Amplifier.
ClkOut_en
ClkOut_1
ClkOut_0
State
Comments
0
X
X
CLKOUT off
Output is 0 volt.
1
0
0
CLKOUT on
The XCO frequency is divided by 16.
1
0
1
CLKOUT on
The XCO frequency is divided by 8.
1
1
0
CLKOUT on
The XCO frequency is divided by 4.
1
1
1
CLKOUT on
The XCO frequency is divided by 2.
Table 22. Output Clock.
Bit_IO_en
Sync_en
State
Comments
0
X
DCLK pin on, RDY
Byte ready, RDY, signal from databyte
1
0
DCLK pin off
Transparent transmission of data
1
1
DCLK pin on, DATACLK
Bit-clock is generated by transmitter
Table 23. Synchronizer Mode
ASK_EN
Modulation1
Modulation0
State
Comments
0
0
0
Closed loop VCO-modulation
VCO is phase-locked
0
0
1
Open loop VCO-modulation
VCO is free-running
0
1
0
Modulation by A,M and N
Modulation inside PLL
0
1
1
Not used
1
0
0
ASK modulation with spreading code applied to
VCO. Not recommended.
VCO is phase-locked
1
0
1
ASK modulation with spreading code applied to
VCO. Not recommended.
VCO is free-running
1
1
0
ASK modulation with spreading code applied to
internal modulation by A, M and M
Modulation inside PLL
1
1
1
ASK modulation
VCO is phase-locked
Table 24. Modulation.



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