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MRF89XA
TABLE 5-6:
TRANSMITTER AC CHARACTERISTICS (1)
Symbol
RFOP
Description
RF Output Power, Programmable
with 8 Steps of typ. 3 dB
Min
—
—
Typ
+12.5
-8.5
Max
—
—
Unit
dBm
dBm
Condition
Maximum power setting.
Minimum power setting.
PN
Phase Noise
—
-112
—
dBc/Hz Measured with a 600 kHz
offset at the transmitter output.
TXSP
Transmitted Spurious
—
—
-47
dBc
At any offset between 200 kHz
and 600 kHz, unmodulated
carrier, f dev = 50 kHz.
TX2
Second Harmonic
No modulation, see Note 2
TX3
TX4
Third Harmonic
Fourth Harmonic
—
—
-40
dBm
TXn
Harmonics above TX4
FSKDEV
TSTWF
TSTWS
FSK Deviation
Transmitter Wake-up Time
Transmitter Wake-up Time
±33
—
—
±55
120
600
-200
500
900
kHz
μs
μs
Programmable
From FS to TX ready.
From Stand-by to TX ready.
Note 1:
2:
Guaranteed by design and characterization.
Transmitter in-circuit performance with RFM recommended SAW filter and crystal.
5.2
Timing Specification and Diagram
TABLE 5-7:
SPI TIMING SPECIFICATION (1,2,3)
Parameter
SPI Configure Clock Frequency
SPI Data Clock Frequency
Data Hold and Setup Time
SDI Setup Time for SPI Configure
SDI Setup Time for SPI Data
CSCON Low to SCK Rising Edge;
Min
—
—
2
250
312
500
Typ
—
—
—
—
—
—
Max
6
1
—
—
—
—
Unit
MHz
MHz
μs
ns
ns
ns
Condition
—
—
—
—
—
—
SCK Falling Edge to CSCON High
CSDAT Low to SCK Rising Edge;
625
—
—
ns
—
SCK Falling Edge to CSDAT High
CSCON Rising to Falling Edge
CSDAT Rising to Falling Edge
500
625
—
—
—
—
ns
ns
—
—
Note 1:
2:
Typical Values: T A = 25°C, V DD = 3.3V, crystal frequency = 12.8 MHz, unless otherwise specified.
Negative current is defined as the current sourced by the pin.
? 2010–2011 Microchip Technology Inc.
Preliminary
DS70622C-page 107
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