The AD800 and AD802 employ a second order phase-locked loop architecture to perform clock recovery and data retiming on Non-Return to Zero, NRZ, data. This architecture is capable of supporting data rates between 20 Mbps and 160 Mbps. The products described here have been defined to work with standard telecommunications bit rates. 45 Mbps DS-3 and 52 Mbps STS-1 are supported by the AD800-45 and AD800-52 respectively. 155 Mbps STS-3 or STM-1 are supported by the AD802-155.
Unlike other PLL-based clock recovery circuits, these devices do not require a preamble or an external VCXO to lock onto input data. The circuit acquires frequency and phase lock using two control loops. The frequency acquisition control loop initially acquires the clock frequency of the input data. The
phase-lock loop then acquires the phase of the input data, and ensures that the phase of the output signals track changes in the phase of the input data. The loop damping of the circuit is dependent on the value of a user selected capacitor; this defines jitter peaking performance and impacts acquisition time. The devices exhibit 0.08 dB jitter peaking, and acquire lock on random or scrambled data within 4 × 105 bit periods when using a damping factor of 5.
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Standard Products 44.736 Mbps-DS-3 51.84 Mbps-STS-1 155.52 Mbps-STS-3 or STM-1Accepts NRZ Data, No Preamble RequiredRecovered Clock and Retimed Data OutputsPhase-Locked Loop Type Clock Recovery-No Crystal RequiredRandom Jitter: 208 Peak-to-PeakPattern Jitter: Virtually Eliminated10KH ECL CompatibleSingle Supply Operation: 5.2 V or +5 VWide Operating Temperature Range: 408C to +858C
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Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Input Voltage (Pin 16 or Pin 17 to VCC) . . . . VEE to +300 mV
Maximum Junction Temperature
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Ceramic DIP Package . . . . . . . . . . . . . . . . . . . . . . +175°C
Storage Temperature Range . . . . . . . . . . .65°C to +150°C
Lead Temperature Range (Soldering 60 sec) . . . . . .+300°C
ESD Rating
AD800 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500 V
AD802 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 V
Post a Buying Lead
Required Field 
