cx24118a NXP Semiconductors, cx24118a Datasheet - Page 42

• Manufacturer Part Number: cx24118a
• Description: Advanced Modulation Digital Satellite Tuner
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 11.
CX24118A_N_2
Product data sheet
Operating VCO frequency
Tuning step size @ 40 MHz f
Reference frequency
Spurs
Integrated DSB phase noise with 40 MHz reference
frequency
Lock time
Reference oscillator output frequency
Reference oscillator output level
Reference oscillator output DC offset
FOOTNOTES:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
This is the current drawn when all blocks are disabled except the crystal oscillator and digital sections.
–25 dBm is single tone power and –6 dBm is the aggregate average power of 40 QPSK modulated carriers.
–69 dBm is the minimum power at 20 MSps, and –81 dB is the minimum power at 1 MSps.
This LO leakage is at RF_INP pin from 925 MHz–2175 MHz.
f3dB is the baseband bandwidth given by:
f3dB is calculated for alpha of 0.35, LNB
These IIP3 tone offsets are specifically for a symbol rate of 20 MSps, with the overall filter bandwidth set at 18.5 MHz and the bandwidth
of the filter at the mixer output set at 35 MHz. The IIP3 tone offsets scale with symbol rate assuming a channel spacing of 1.5*SR. Thus
the ±(31,60) MHz tones correspond to ±(1.5*SR, 3*SR) MHz and the ±(91,180) MHz tones correspond to ±(4.5*SR, 9*SR) MHz.
This level is derived assuming –23 dBm is the maximum level of all other transponders, an operating symbol rate of 20 MSps and a C/I of
7 dB.
From after serial communication has been received to stable lock.
The output level is across 10 k
is a square wave when OutRefDiv is set to
(8)
Receiver Electrical Specifications (Sheet 3 of 3)
Parameter
ref
Ω
|| 20 pF load. The output waveform is sinusoidal when register bit OUTRefDiv (0x02[2]) is set to
(9)
offset
Reference Oscillator Output Specifications
SR
------- -
2
÷
2.
of 2.5 MHz. PLL step size, being very small (160 Hz), can be ignored.
×
(
1
1 MHz to 40 MHz offset frequencies
Integrated from 1 kHz to 1 MHz offset
frequencies
Between any two frequencies within the
operating range of 925 MHz to 2175
MHz
+
alpha
Rev. 02 — 08 September 2009
Chapter 5: Electrical, Thermal, and Mechanical Specifications
)
+
LNB
Conditions
offset
+
1
-- -
2
×
(
PLL step size
2330
)
Min
40 (20)
Typ
160
–40
–44
1.6
40
1
2
CX24118A
4660
Max
–30
–36
5
© NXP B.V. 2009. All rights reserved.
÷
Units
1, and
msec
Vp–p
MHz
MHz
MHz
dBc
dBc
Hz
V
42