General description
The TDA18250 is a silicon tuner IC designed specifically for high definition cable Set-Top
Boxes (STB) supporting single streaming.
Used in conjunction with a digital channel demodulator, the TDA18250 covers all
worldwide digital cable standards.
• The TDA18250 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 TDA18250 high-performance silicon tuner meets today’s digital cable TV
reception needs with:
– Low power consumption
– High linearity
– Low noise figure
• The TDA18250 ensures ease of use with:
– Easy on-board integration
– Efficient and effective PCB design
– Reduced external components

Features and benefits
 RF frequency coverage up to 1002 MHz
 Integrated wideband gain control
 LOW IF (LIF) output
 Single 3.3 V power supply
 Low power consumption
 Multistandard cable receptions
 Fully integrated IF selectivity, eliminating the need for external SAW filters
 RF Loop-Through (LT)
 Enhanced RF and IF filters to increase selectivity and adjacent channels filtering
 Alignment free
 Fully integrated oscillators:
 No external oscillator components for reduced cost
 16 MHz crystal oscillator output buffer for single crystal applications
 Supports 2 tuner functions specifically aimed for PVR boxes:
 1  RF output to drive slave tuner
 I2C-bus provides:
 3.3 V microcontroller compatibility
 Received Signal Strength Indicator (RSSI) data access
 Die temperature sensor data access
 Lead-free (Pb) manufacturing