LMX9830SM/NOPB National Semiconductor, LMX9830SM/NOPB Datasheet - Page 24
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LMX9830SM/NOPB
Manufacturer Part Number
LMX9830SM/NOPB
Description
IC SRL PORT MOD BLUETOOTH 60FBGA
Manufacturer
National Semiconductor
Datasheet
1.LMX9830SMNOPB.pdf
(46 pages)
Specifications of LMX9830SM/NOPB
Frequency
2.4GHz
Data Rate - Maximum
704kbps
Modulation Or Protocol
Bluetooth v2.0, Class 2
Applications
PDA's, POS Terminals
Power - Output
0dBm
Sensitivity
-80dBm
Voltage - Supply
2.5 V ~ 3.6 V
Current - Receiving
65mA
Current - Transmitting
65mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 125°C
Package / Case
60-FBGA
Physical Interfaces
UART
Data Rate
704Kbps
Operating Temperature Range
-40°C To +125°C
Msl
MSL 4 - 72 Hours
Supply Voltage Range
1.6V To 3.6V
Frequency Max
2480MHz
Termination Type
SMD
Rohs Compliant
Yes
Filter Terminals
SMD
Frequency Min
2402MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Memory Size
-
Lead Free Status / Rohs Status
Compliant
Other names
*LMX9830SM
*LMX9830SM/NOPB
LMX9830SM
*LMX9830SM/NOPB
LMX9830SM
www.national.com
Summary:
Components can then be calculated from loop filter coefficients
Some typical values for the LMX9830 are:
Which give the following component values:
10.9.2 Phase Noise and Lock-Time Calculations
Phase noise has three sources, the VCO, crystal oscillator
and the rest of the PLL consisting of the phase detector, di-
viders, charge pump and loop filter. Assuming the VCO and
crystal are very low noise, it is possible to put down approxi-
mate equations that govern the phase noise of the PLL.
Phase noise (in-band) = PN1Hz + 20Log[N] + 10Log[F
Where PH1Hz is the PLL normalized noise floor in 1 Hz res-
olution bandwidth.
Comparison Frequency
Phase Margin
Loop bandwidth
T3 over T1 ratio
Gamma
VCO gain
Charge pump gain
Fout
C1
C2
C3
R2
R3
Symbol
T1
T2
T3
A0
A1
A2
n
N counter value
Loop Bandwidth
Loop filter pole
Loop filter zero
Loop filter zero
Total capacitance
First order loop filter coefficient
Second order loop filter coefficient
0.17
2.38
0.04
1737
7025
comp
]
Description
24
Further out from the carrier, the phase noise will be affected
by the loop filter roll-off and hence its bandwidth.
As a rule-of-thumb; ΔPhase noise = 40Log[ΔFc]
Where Fc is the relative change in loop BW expressed as a
fraction.
For example if the loop bandwidth is reduced from 100 kHz
to 50 kHz or by one half, then the change in phase noise will
be -12dB. Loop BW in reality should be selected to meet the
13
48
100
40
1.0
120
0.6
2441
20180047
20180045
nF
nF
nF
Ω
Ω
20180046
MHz
Pl rad
kHz
%
MHz per V
mA
MHz
None
rad/s
S
S
S
nF
nFs
nFs2
Units