LMX9830 Datasheet, PDF (8/56 Pages) National Semiconductor (TI) – BluetoothTM Serial Port Module

LMX9830
SNOSAU0C – MAY 2008 – REVISED JUNE 2015
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7.9 RF Synthesizer Performance Characteristics
In the performance characteristics tables the following applies: All tests performed are based on Bluetooth Test Specification
revision 2.0. All tests are measured at antenna port unless otherwise specified. T_A = –40°C to 85°C, VDD_RF = 2.8 V unless
otherwise specified. RF system performance specifications are ensured on Texas Instruments Mesa Board rev 1.1 reference
design platform.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
f_VCO
t_LOCK
Δf₀offset ⁽¹⁾
Δf₀drift ⁽¹⁾
VCO Frequency Range
Lock Time
Initial Carrier Frequency Tolerance
Initial Carrier Frequency Drift
f₀ ± 20 kHz
During preamble
DH1 data packet
DH3 data packet
DH5 data packet
2402
-75
-25
-40
-40
2480
120
0
75
0
25
0
40
0
40
MHz
µs
kHz
kHz
kHz
kHz
Drift Rate
-20
0
20 kHz/50µs
t_D - TX
Transmitter Delay Time
From TX data to antenna
4
µs
(1) Frequency accuracy is dependent on crystal oscillator chosen. The crystal must have a cumulative accuracy of < ±20 ppm to meet
Bluetooth specifications.
7.10 Typical Characteristics
Figure 1. Modulation
Figure 2. Transmit Spectrum
Figure 3. Corresponding Eye Diagram
Figure 4. Synthesizer Phase Noise
8
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