描述 Description

The TDA18250A is a silicon tuner designed specifically for worldwide cable and terrestrial digital Set Top Boxes (STB). The TDA18250A ensures a low system cost by saving external components such as: Low-Noise Amplifiers
Surface Acoustic Wave (SAW) filters
RF splitter


Moreover, thanks to its 8 kV ESD capability, EIA/JESD22-A114 (HBM), on the RF input pin and the loop-through pin, the application level ESD protection can be reduced.The TDA18250A silicon tuner meets current and future digital cable and terrestrial TV reception with:Low-power consumption
High linearity
Very low noise figure (3.8 dB typical)
High immunity to wireless interferers (WLAN, LTE and GSM)

The TDA18250A ensures ease of use with:Easy on-board integration
Efficient and effective PCB design
Reduced external components
Integrated Zero Power Loop-Through (ZPLT)

特性 Features

Single 3.3 V supply voltage
RF frequency coverage up to 1 GHz
Flexible low IF output from 3 MHz to 7.5 MHz to ease the matching with various demodulators
RoHS compliant
I2C-bus interface compatible with 3.3 V microcontrollers
Strong Immunity to wireless interferers (WLAN, GSM, LTE)
Multi-reference clock frequency compliant: 16 MHz, 24 MHz, 25 MHz, 27 MHz, 30 MHz
Crystal oscillator output buffer to drive demodulator, SoC or slave tuner
Slave Tuner Output (STO), integrated splitter for dual tuner applications
Fully integrated oscillators
LT output, both in active and Zero Power Loop-Through mode (ZPLT)
Fully integrated IF and RF selectivity; eliminating the need for external SAW filters
Single-ended RF input (no need for external balun)
Enhanced ESD protection (8 kV) on RF_IN and ZPLT pins
Alignment free
Excellent return loss compatible with cable requirements
Integrated RSSI function, readable through I2C-bus
Integrated temperature sensor
Integrated gain control

應用 Application

Digital cable STB applications:DVB-C
J83.B
J83.C

Digital terrestrial STB applications:DTMB
DVB-T/DVB-T2 (NORDIG 2.4, DTG D-Book 7)
ISDB-T
ATSC

PVR
DOCSIS 2.0 and EuroDOCSIS 2.0 cable modem
DOCSIS 3.0 and EuroDOCSIS 3.0