General description
●The TDA18250HN is a Silicon Tuner IC designed specifically for high definition cable Set Top Boxes (STB) supporting single streaming.
●Used in conjunction with the TDA10024HN (digital channel demodulator), the TDA18250HN covers all worldwide digital cable standards.
●• The TDA18250HN 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 TDA18250HN high-performance Silicon Tuner meets today’s digital cable TV reception needs with:
● – Low power consumption
● – High linearity
● – Low noise figure
●• The TDA18250HN 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 860 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
●■ I2C-bus provides:
● ♦ 3.3 V microcontroller compatibility
● ♦ Received Signal Strength Indicator (RSSI) data access
● ♦ Die temperature sensor data access
●■ Lead-free (Pb) manufacturing
