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TDA18254AHN Datasheet

Cable Silicon Tuner

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TDA18254AHN
Cable Silicon Tuner
Rev. 4 — 10 May 2011
Product short data sheet
1. General description
The TDA18254AHN is a Silicon Tuner IC designed specifically for high definition
multi-tuner cable Set Top Boxes (STB) supporting single streaming and multi-streaming
PVR STBs with watch, record, Video-On-Demand (VOD) and in-home video distribution
capability.
Used in conjunction with the TDA10024HN (digital channel demodulator), the
TDA18254AHN covers all worldwide digital cable standards.
The TDA18254AHN ensures a low system cost as:
Costly components such as low-noise amplifiers, Surface Acoustic Wave (SAW)
filters are eliminated from the system BOM
The TDA18254AHN high-performance Silicon Tuner meets today’s digital cable TV
reception needs with:
Same level of performance for master and slave tuners
Low power consumption
High linearity
Low noise figure
The TDA18254AHN ensures ease of use with:
Easy on-board integration
Efficient and effective PCB design
Reduced external components
2. Features and benefits
„ Supports 4 tuner functions specifically aimed for PVR boxes:
‹ 1 × low IF output
‹ 3 × RF outputs to drive slave tuners
„ Integrated wideband gain control
„ Extended frequency coverage up to 1002 MHz
„ Integrated RF tracking filters for rejection of unwanted signals
„ Single 3.3 V power supply
„ Low power consumption
„ Multistandard cable receptions
„ Enhanced RF and IF filters to increase selectivity and adjacent channels filtering
„ RF loop-through
„ Fully integrated IF selectivity, eliminating the need for external SAW filters
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NXP Semiconductors Electronic Components Datasheet

TDA18254AHN Datasheet

Cable Silicon Tuner

No Preview Available !

NXP Semiconductors
TDA18254AHN
Cable Silicon Tuner
„ Alignment free
„ Fully integrated oscillators:
‹ No external oscillator components for reduced cost
‹ 16 MHz crystal oscillator output buffer for single crystal applications
„ I2C-bus provides:
‹ 3.3 V microcontroller compatibility
‹ Received Signal Strength Indicator (RSSI) data access
‹ Die temperature sensor data access
„ Lead-free (Pb) manufacturing
3. Quick reference data
Table 1.
Symbol
fRF
NFtun
ϕn
P
αimage
Quick reference data
Parameter
Conditions
RF frequency
edge
tuner noise figure maximum gain
phase noise
worst case in the RF
frequency range
10 kHz
100 kHz
power dissipation
image rejection
Min Typ Max Unit
51 -
1002 MHz
- 7.5 8.5 dB
- 85 -
- 105 -
- 0.91 -
55 62 -
dBc/Hz
dBc/Hz
W
dB
4. Ordering information
Table 2. Ordering information
Type number
Package
Name Description
Version
TDA18254AHN/C1 HVQFN48 plastic thermal enhanced very thin quad flat package; SOT619-1
no leads; 48 terminals; body 7 × 7 × 0.85 mm
TDA18254AHN_SDS
Product short data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 10 May 2011
© NXP B.V. 2011. All rights reserved.
2 of 8
Free Datasheet http://www.datasheet4u.com/


Part Number TDA18254AHN
Description Cable Silicon Tuner
Maker NXP
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