描述 Description

The TDA18274 is a high performance silicon tuner designed for terrestrial and cable TV reception for both analog and digital signals.
The TDA18274 supports all analog and digital TV standards and delivers a LOW IF (LIF) signal to a demodulator for analog TV and/or a channel demodulator for digital TV.
The TDA18274 facilitates TV design by:
Allowing on-board integration
Drastically reducing the tuner Bill Of Material (BOM)
Providing flexibility in system solution development
Allowing straightforward and cost effective multi-tuner applications optimization

特性 Features

Single 3.3 V supply voltage
Worldwide multistandard terrestrial and cable capabilities
Alignment free
RoHS compliant
I2C-bus interface compatible with 3.3 V microcontrollers
Crystal oscillator output buffer as well as Slave Tuner Output (STO) for multiple tunerapplications
Fully integrated oscillators
Fully integrated RF selectivity (no need for RF tracking filters coils) (TDA18274HDonly)
2 programmable General-Purpose Outputs (GPO)
1.7 MHz, 6 MHz, 7 MHz, 8 MHz and 10 MHz channel bandwidths
LIF channel center frequency output ranging from 0.8 MHz to 7.5 MHz
Fully integrated IF selectivity; eliminating the need for external SAW filters
Large flexibility in the IF filtering stage to ease the matching with various demodulatorscircuits
Single-ended RF input, no need for external balun
Up to 1 GHz RF input capability
Excellent return loss compatible with cable requirements
Power Level Detector (PLD) embedded
Integrated gain control
Self-AGC synchronization mode (VSync) for analog reception
Very fast tuning time
Strong immunity to LTE interferers in the digital dividend bandwidth
Strong immunity to WLAN interferers