TDA8260TW Description
The direct conversion QPSK demodulator is the front-end receiver dedicated to digital TV broadcasting, satisfying both DVB and DBS TV standards. The wide range oscillator (from 950 to 2175 MHz) covers the American, European and Asian satellite bands, as well as the SMA-TV US standard. The Zero-IF concept discards traditional IF filtering and intermediate conversion techniques.
TDA8260TW Key Features
- Direct conversion Quadrature Phase Shift Keying (QPSK) and 8-Phase Shift Keying (8PSK) demodulation (Zero-IF)
- Frequency range: 950 to 2175 MHz
- High level asymmetrical RF input
- 0 to 50 dB variable gain with AGC control
- Loop-controlled 0 to 90° phase shifter
- High AGC linearity (<1 dB per bit with an 8-bit DAC), AGC voltage variable between 0 and 3 V
- Integrated 5th-order matched baseband filters for in-phase (I) and quadrature (Q) signal paths
- Controlled I-to-Q gain balance
- I2C-bus controlled PLL frequency synthesizer
- Low phase noise