National Semiconductor LMX9838, Руководство пользователя

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Transmitter Performance Characteristics
Symbol Parameter Condition Min
Typ
(Note 15)
Max Unit
P
OUT
RF Transmit Output Power 2.402 GHz −4 0 +3 dBm
2.441 GHz −4 0 +3 dBm
2.480 GHz −4 0 +3 dBm
MOD
Δ
F1
AVG
Modulation Characteristics Data = 00001111 140 165 175 kHz
MOD
Δ
F2
MAX
(Note 18)
Modulation Characteristics Data = 10101010 115 125 kHz
Δ
F2
AVG
/DF1
AVG
(Note
19)
Modulation Characteristics 0.8
20 dB Bandwidth 1000 kHz
P
OUT
2*f
o
(Note 20) PA 2 nd Harmonic Suppression Maximum gain setting:
f
0
= 2402 MHz,
P
out
= 4804 MHz
-30 dBm
Z
RFOUT
(Note 21) RF Output Impedance/Input
Impedance of RF Port (RF_inout) P
out
@ 2.5 GHz 47
Ω
Note 17: Typical operating conditions are at 2.75V operating voltage and 25°C ambient temperature.
Note 18:
Δ
F2max
≥
115 kHz for at least 99.9% of all
Δ
f2max.
Note 19: Modulation index set between 0.28 and 0.35.
Note 20: Out-of-Band spurs only exist at 2nd and 3rd harmonics of the CW frequency for each channel.
Note 21: Not tested in production.
Synthesizer Performance Characteristics
Symbol Parameter Condition Min Typ Max Unit
f
VCO
VCO Frequency Range 2402 2480 MHz
t
LOCK
Lock Time f
0
± 20 kHz 120 µs
Δ
f
0
offset (Note 22)
Initial Carrier Frequency Tolerance During preamble -75 0 75 kHz
Δ
f
0
drift (Note 22)
Initial Carrier Frequency Drift DH1 data packet -25 0 25 kHz
DH3 data packet -40 0 40 kHz
DH5 data packet -40 0 40 kHz
Drift Rate -20 0 20 kHz/50µs
t
D
- Tx Transmitter Delay Time From Tx data to antenna 4 µs
Note 22:
Frequency accuracy is dependent on crystal oscillator chosen. The crystal must have a cumulative accuracy of < +/-20ppm to meet Bluetooth
specifications.
Note: All RF parameters are tested prior to the antenna.
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LMX9838