MRF49XA Datasheet, PDF (82/102 Pages) Microchip Technology – ISM Band Sub-GHz RF Transceiver

MRF49XA
TABLE 5-5: TRANSMITTER AC CHARACTERISTICS⁽¹⁾
Parameters
Condition
Min
Typ
RF Carrier Frequency
433 MHz band, 2.5 kHz resolution 430.24
—
868 MHz band, 5.0 kHz resolution 860.48
—
915 MHz band, 7.5 kHz resolution 900.72
—
Maximum RF Output Power
433 MHz @ 50Ω load
—
7
868 MHz @ 50Ω load
—
5
915 MHz @ 50Ω load
—
5
RF Output Power Control Range In steps of 8
Pmax – 17.5
—
TX Gain Control Resolution
Programmed in 8 steps
—
2.5
Harmonic Suppression
At maximum power, 50Ω load
—
—
Open-Collector Output DC
Current
Spurious Emission
| f-fsp | > 1 MHz
Output Capacitance (Set by the
Automatic Antenna Tuning
Circuit)
Quality Factor of the Output
Capacitance
Programmable
At maximum power, 50Ω load
433 MHz band
868 MHz band
915 MHz band
433 MHz band
868 MHz band
0.5
—
—
—
2
2.6
2.1
2.7
2.1
2.7
13
15
8
10
Output Phase Noise
FSK Bit Rate
FSK Bit Rate
FSK Frequency Deviation
915 MHz band
100 kHz from carrier
1 MHz from carrier
Internal TX Data register
TX data connected to the FSK
input
Programmable in 15 kHz steps
8
10
—
-80
—
-103
—
—
—
—
15
—
Note 1: Typical Values: TA = 25°C, VDD = 3.3V.
TABLE 5-6: PLL PARAMETERS AC CHARACTERISTICS⁽¹⁾
Parameters
Condition/Note
Min
Typ
PLL Reference Frequency
Crystal related timing and fre-
9
10
quency parameters change
according to the PLL reference
frequency
PLL Lock Time
Frequency error < 1 kHz after
—
30
10 MHz step
PLL Start-up Time
With a running crystal oscillator
—
200
and based on the design
Note 1: Typical Values: TA = 25°C, VDD = 3.3V.
Max
439.75
879.51
929.27
—
—
—
Pmax
—
-35
Unit
MHz
MHz
MHz
dBm
dBm
dBm
dBm
dB
dBc
6
mA
-55
dBc
3.2
pF
3.3
pF
3.3
pF
17
—
12
—
12
—
—
dBc/Hz
—
dBc/Hz
172
kbps
256
kbps
240
kHz
Max
Unit
11
MHz
—
μs
300
μs
DS70590B-page 80
Preliminary
© 2009 Microchip Technology Inc.