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TDA6650ATT

5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog); \n\nSingle-chip 5 V mixer/oscillator and low phase noise PLL synthesizer for TV and VCR tuners, dedicated to hybrid (digital and analog) and pure digital applications for Japanese standards (NTSC and ISDB-T)\n\nFive possible step frequencies to cope with different digital terrestrial TV and analog TV standards\n\nEight charge pump currents between 40 uA and 600 uA to reach the optimum phase noise performance over the bands\n\nI2C-bus protocol compatible with 2.5 V, 3.3 V and 5 V microcontrollers: \nAddress + 5 data bytes transmission (I2C-bus write mode)\n\nAddress + 1 status byte (I2C-bus read mode)\n\nFour independent I2C-bus addresses\n\n\n\n\nFive 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\n\nWideband AGC detector for internal tuner AGC: \nSix programmable take-over points\n\nTwo programmable time constants\n\nAGC flag\n\n\n\n\nIn-lock flag\n\nCrystal frequency output buffer\n\n33 V tuning voltage output\n\nFractional-N programmable divider\n\nBalanced mixers with a common emitter input for the low band and for the mid band (each single input)\n\nBalanced mixer with a common base input for the high band (balanced input)\n\n2-pin asymmetrical oscillator for the low band\n\n2-pin symmetrical oscillator for the mid band\n\n4-pin symmetrical oscillator for the high band\n\nSwitched concept IF amplifier with both asymmetrical and symmetrical outputs to drive low impedance or SAW filters i.e. 500 Ω/40 pF\n\n\n;

\nThe TDA6650ATT; TDA6651ATT is a programmable 3-band mixer/oscillator and low phase noise PLL synthesizer intended for pure 3-band tuner concepts applied to hybrid (digital and analog) or digital-only terrestrial and cable TV reception.\n\nThe device 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. Two pins are available between the mixer output and the IF amplifier input to enable IF filtering for improved signal handling and to improve the adjacent channel rejection.\n\nThe IF amplifier is switchable in order to drive both symmetrical and asymmetrical outputs. When it is used as an asymmetrical amplifier, the IFOUTB pin needs to be connected to the supply voltage VCCA.\n\nFive open-drain PMOS ports are included on the IC. Two of them, BS1 and BS2, are also dedicated to the selection of the low, mid and high bands. PMOS port BS5 pin is shared with the ADC.\n\nThe AGC detector provides a control that can be used in a tuner to set the gain of the RF stage. Six AGC take-over points are available by software. Two programmable AGC time constants are available for search tuning and normal tuner operation.\n\nThe local oscillator signal is fed to the fractional-N divider. The divided frequency is compared to the comparison frequency into the fast phase detector which drives the charge pump. The loop amplifier is also on-chip, including the high-voltage transistor to drive directly the 33 V tuning voltage without the need to add an external transistor.\n\nThe comparison frequency is obtained from an on-chip crystal oscillator. The crystal frequency can be output to the XTOUT pin to drive the clock input of a digital demodulation IC.\n\nControl data is entered via the I2C-bus; six serial bytes are required to address the device, select the Local Oscillator (LO) frequency, select the step frequency, program the output ports and set the charge pump current or enable or disable the crystal output buffer, select the AGC take-over point and time constant and/or select a specific test mode. A status byte concerning the AGC level detector and the ADC voltage can be read out on the SDA line during a read operation. During a read operation, the loop 'in-lock' flag, the power-on reset flag and the automatic loop bandwidth control flag are read.\n\nThe device has 4 programmable addresses. Each address can be selected by applying a specific voltage to pin AS, enabling the use of multiple devices in the same system.\n\nThe I2C-bus is fast mode compatible, except for the timing as described in the functional description and is compatible with 5 V, 3.3 V and 2.5 V microcontrollers depending on the voltage applied to pin BVS.\n\n

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TDA6650ATT

5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

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TDA6650ATT/C3

5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

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TDA6650ATT/C3/S2

5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

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TDA6650ATTSLASHC3

5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

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TDA6650ATTSLASHC3SLASHS2

5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

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