General description

The TDA18252HN is a single-chip direct conversion Silicon Tuner IC designed for digital-only cable applications.

The TDA18252HN integrates a loop-through feature that enables the RF input signal to be used as an output for another downconverter. This feature simplifies the application and reduces the Bill Of Materials (BOM).

• The TDA18252HN ensures a low system cost as:

– Costly components such as low-noise amplifiers, Surface Acoustic Wave (SAW) filters and incremental crystal oscillators are eliminated from the system BOM

• The TDA18252HN high-performance Silicon Tuner meets today’s digital cable TV reception needs with:

– Low power consumption

– High linearity

– Low noise figure

• The TDA18252HN ensures ease of use with:

– Easy on-board integration

– Efficient and effective PCB design

– Reduced external components

Features and benefits

■ Single 3.3 V power supply

■ Low power consumption

■ Extended frequency coverage of up to 1002 MHz

■ Digital cable reception for STB

■ RF loop-through

■ Fully integrated IF selectivity; eliminating the need for external SAW filters

■ Alignment free

■ Fully integrated oscillator with no external components

■ Integrated wideband gain control

■ Crystal oscillator output buffer (16 MHz) for single crystal applications

■ I2C-bus provides:

♦ 3.3 V and 5 V microcontroller compatibility

♦ Received Signal Strength Indicator (RSSI) data access

♦ Die temperature sensor data access

♦ Addressing of up to four tuners in a system

■ Lead-free manufacturing