TDA6650ATT

The TDA6650ATT is designed as one kind of programmable 3-band mixer/oscillator and low phase noise PLL synthesizer device that is intended for pure 3-band tuner concepts applied to hybrid (digital and analog) or digital only terrestrial and cable TV reception. And TDA6650ATT includes three double balanced mixers for low, mid and high bands, three oscillators for the corresponding bands, a switchable IF amplifier, a wideband AGC detector and a low noise PLL synthesizer.

Features of the TDA6650ATT are:(1)Five possible step frequencies to cope with different digital terrestrial TV and analog TV standards; (2)Eight charge pump currents between 40 mA and 600 mA to reach the optimum phase noise performance over the bands; (3)Automatic Loop Bandwidth Control (ALBC) sets the optimum phase noise performance for DVB-T channels; (4)Five PMOS open-drain ports with 15 mA source capability for band switching and general purpose; one of these ports is combined with a 5-step ADC; (5)In-lock flag; (6)Crystal frequency output buffer; (7)33 V tuning voltage output; (8)Fractional-N programmable divider; (9)Balanced mixers with a common emitter input for the low band and for the mid band (each single input); (10)Balanced mixer with a common base input for the high band (balanced input).etc.

The absolute maximum ratings of the TDA6650ATT can be summarized as:(1)supply voltage: 4.5 to 5.5 V;(2)supply current: 80 to 136 mA;(3)power-on reset supply voltage: 2.85 to 3.5 V;(4)frequency range the PLL is able to synthesize: 64 to 1024 MHz;(5)crystal frequency: 4.0 MHz;(6)input impedance (absolute value): 350 to 430 ;(7)crystal drive level: 70 uW;(8)output leakage current in off state: -10 uA;(9)output saturation voltage: 0.2 to 0.4 V;(10)ADC input voltage: 0 to 5.5 V. If you want to know more information such as the electrical characteristics about the TDA6650ATT, please download the datasheet in www.seekic.com or www.chinaicmart.com.