tda18219hn NXP Semiconductors, tda18219hn Datasheet - Page 5

• Manufacturer Part Number: tda18219hn
• Description: Silicon Tuner For Terrestrial And Cable Digital Tv Reception
• Manufacturer: NXP Semiconductors

NXP Semiconductors
9. Functional description
TDA18219HN_1
Objective data sheet
Table 4.
The Silicon Tuner is based on single down-conversion and LOW IF architecture (LIF) that
allows full integration of selectivity and eliminates the need for external SAW filters.
The RF input signal is fed to the input splitter, built-out of a Low Noise Amplifier (LNA). It is
followed by an alignment free RF tuned filter to protect the rest of the tuner function
against strong unwanted signals.
The LOW IF concept needs complex signals that highly suppress the N + 1 image
channel thanks to image rejection calibration. The IF selectivity is performed by a complex
filter and a IF filter which depends on IF frequency choice and channel bandwidth. The IF
filter is built with a IF Low-Pass Filter (LPF), an IF notch filter which can be activated to
suppress the residual adjacent N − 1 sound carrier and a programmable IF High-Pass
Filter (HPF) for more flexibility on IF frequency.
Symbol
V
CAPREGVCO
GND(SYNTH)
VTUNE
CP
XTOUT1
XTOUT2
TEST2
IFN
IFP
GND(IF)
V
VIFAGC
TEST3
IRQ
VHFSUPPLY
VHFLOW
VHFSENSE
VHFHIGH
V
UHFLOW
UHFSUPPLY
UHFHIGH
n.c.
CAPRFAGC
GND(RF)
CC(SYNTH)
CC(IF)
CC(RF)
Pin description
Pin
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
die pad
Rev. 01 — 3 February 2010
…continued
Silicon Tuner for terrestrial and cable digital TV reception
Description
synthesizer supply voltage
VCO regulator filtering input
synthesizer ground
VCO tuning voltage input
charge pump output
crystal oscillator buffer output 1
crystal oscillator buffer output 2
test input 2, must be connected to ground
IF negative output
IF positive output
IF ground
IF supply voltage
IF gain control input
test input 3, must be connected to ground
interrupt request output
RF filter VHF supply input
RF filter VHF LOW input
RF filter VHF sense
RF filter VHF HIGH input
RF filter supply voltage
RF filter UHF LOW input
RF filter UHF supply input
RF filter UHF HIGH input
not connected
RF AGC filtering
RF ground
TDA18219HN
© NXP B.V. 2010. All rights reserved.
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