GS9010A
Serial Digital Automatic Tuning Subsystem
Description
Features
Applications
Downloads
The GENLINX™ GS9010A is a monolithic integrated circuit designed to be an Automatic Tuning Subsystem (ATS) when used with the GS9005A Receiver or the GS9015A Reclocker and the GS9000B or GS9000S Decoder. The GS9010A ATS eliminates the need to manually set or externally temperature compensate the Receiver or Reclocker VCO. The GS9010A can also determine whether the incoming data stream is 4fsc NTSC, 4fsc PAL or component 4:2:2.
The GS9010A is an enhanced version of the GS9010. Pin compatible with the GS9010, the GS9010A offers improved noise immunity to spurious HSYNC signals.
The GS9010A includes a ramp generator/oscillator which repeatedly sweeps the Receiver/Reclocker VCO frequency over a set range until the system is correctly locked. Once locked, an automatic fine tuning (AFT) loop maintains the VCO control voltage at its optimum centre point over variations in temperature. During normal operation, the GS9000B or GS9000S Decoder provides continuous HSYNC pulses which disable the ramp/oscillator of the GS9010A. This maintains the correct Receiver/Reclocker VCO frequency. When an interruption to the incoming data stream is detected by the Receiver/Reclocker, the Carrier Detect goes LOW and opens the AFT loop in order to maintain the correct VCO frequency for a period of typically 2 seconds. If the signal is re-established within this 2 seconds, the Receiver/Reclocker will rapidly relock. For periods longer than typically 2 seconds, the VCO slowly drifts towards a minimum frequency. Typically after 2 minutes, the serial clock output of the PLL settles to approximately 85MHz when f/2 is high or 170MHz when f/2 is low. The GS9010A is packaged in a 16 pin wide SOIC, operates from a single +5 or -5 volt supply and typically consumes 40mW of power.
- when used with the GS9005A or GS9015A and the GS9000B or GS9000S, the GS9010A:
- constitutes an automatic 'tweakless' Serial Digital receiving system
- eliminates the need for trim pots and external temperature compensation for bit rates to 370Mb/s
- automatically determines whether data is 4fsc or 4:2:2, and whether the 4fsc data is NTSC or PAL
- acquires lock from a 'no signal' condition in typically 50ms
- holds lock during data interruptions for typically 2s
- relocks from synchronous switching in less than 10ms
- 16 pin SOIC packaging
- operates from a single +5 or -5 volt supply
- typically consumes only 40mW
- immunity to spurious HSYNC inputs
- defines minimum GS9005A VCO frequency after extended absence of input signal
- matches GS9005A capture range
4fsc, 4:2:2 & 360Mb/s serial digital interfaces
Ordering Information| Part No | Package | GS9010ACKC
| 16 pin SOIC Wide | GS9010ACTC
| 16 pin SOIC Wide Tape | GS9010ACKCE3
| 16 pin SOIC Wide |
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