TDA18252HN/C1,551 NXP Semiconductors, TDA18252HN/C1,551 Datasheet - Page 2

• Manufacturer Part Number: TDA18252HN/C1,551
• Description: IC DGTL CABLE SIL TUNER 48HVQFN
• Manufacturer: NXP Semiconductors
• Type: Silicon Tunerr

Specifications of TDA18252HN/C1,551

• Applications: Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: 48-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935286958551

The received signal spectrum is down-converted and filtered
to low-IF signal. This directly feeds the QAM demodulator,
without needing conventional high cost external filtering.
The TDA18252HN provides a low IF frequency of 4 MHz from
a 6 MHz bandwidth, 4.5 MHz from a 7 MHz bandwidth and
5 MHz from an 8 MHz bandwidth.
Working with a single 16 MHz crystal, the IC’s buffered clock
output can provide the system clock for other tuners and
for channel decoders. The TDA18252HN also includes an
integrated analog loop-through function.
NXP offers a number of complete reference designs based
on the TDA18252HN, further reducing your time and effort
when developing new set-top box solutions.
Key parameters
TDA18252 block diagram
www.nxp.com
Parameter
Frequency range
Noise figure
Phase noise
Power dissipation
CSO/CTB
Image rejection
Low leakage
RF
LT
IN
AS
ATT
LNA
INTERFACE
SCL
I
2
C
CONTROL
SDA
LEVEL
stepped
AGC
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SYNTHESIZER
CP
K
bandpass
filter
VT
Value (typical)
41 – 1002 MHz
7 dB
-85 dBc @ 10 kHz
800 mW
57/63 dBc
60 dBc
8 dBµV
K
mixer
XTAL
filter
IF
P
XTAL
osc
XTAL
AGC
IF
N
IF
IF
V
XT
XT
IF_AGC
OUT_P
OUT_N
OUT_P
OUT_N
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Front-end OM3853C/C1 reference design
NXP’s OM3853/C1 single channel digital cable front-end
reference design helps cable STB makers in China develop
straightforward and cost effective receivers. Along with
our TDA18252HN – incorporating low-profile shielding for
EMI protection – it also features the QAM demodulator
TDA10024HN. The TDA10024HN controls the tuner gain
by delivering the AGC control voltage. For the QAM
demodulator, an on-board 1.8 V supply voltage is available.
½ NIM OM3865C/C1 reference design
Our OM3865/C1 lets you quickly evaluate the TDA18252HN
in your existing STB platforms. It is pin-to-pin compatible with
conventional can tuners currently used in the Chinese market.
through
input
loop
RF
SILICON TUNER
TDA18252
XT
IF
AGC
OUT
OUT
3.3 V SUPPLY
REGULATION
FILTERING
AND
Date of release: March 2008
Document order number: 9397 750 16486
Printed in the Netherlands
1.80 V
TDA10024
I
2
C IN
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TS