a 155.52 MHz Frequency Synthesizer AD809 FEATURES 155.52 Mbps ports. The AD809 can be applied to create the trans- Frequency Synthesis to 155.52 MHz mit bit clock for one or more ports. 19.44 MHz or 9.72 MHz Input An input signal multiplexer supports loop-timed applications Reference Signal Select Mux where a 155.52 MHz transmit bit clock is recovered from the Single Supply Operation: +5 V or 5.2 V 155.52 Mbps received data. Output Jitter: 2.0 Degrees RMS The low jitter VCO, low power and wide operating temperature Low Power: 90 mW range make the device suitable for generating a 155.52 MHz bit 10 KH ECL/PECL Compatible Output clock for SONET/SDH/Fiber in the Loop systems. 10 KH ECL/PECL/TTL/CMOS Compatible Input Package: 16-Pin Narrow 150 Mil SOIC The device has a low cost, on-chip VCO that locks to either 8 or 16 the frequency at the 19.44 MHz or 9.72 MHz input. No external components are needed for frequency synthesis how- ever, the user can adjust loop dynamics through selection of a damping factor capacitor whose value determines loop damping. PRODUCT DESCRIPTION The AD809 design guarantees that the clock output frequency The AD809 provides a 155.52 MHz ECL/PECL output clock from will drift low (by roughly 20%) in the absence of a signal at the either a 19.44 MHz or a 9.72 MHz TTL/CMOS/ECL/PECL refer- input. ence frequency. The AD809 functionality supports a distributed timing architecture, allowing a backplane or PCB 19.44 MHz or The AD809 consumes 90 mW and operates from a single power 9.72 MHz timing reference signal to be distributed to multiple supply at either +5 V or 5.2 V. FUNCTIONAL BLOCK DIAGRAM CF1 CF2 7 8 CLKIN 13 (19.44MHz AUTO LOOP OR PFD VCO SELECT FILTER 9.72MHz) CLKINN 12 BW ADJUST 10 TTL/CMOSIN AUTO SELECT DIVIDE BY 8/16 AD809 5 2 CLKOUT PECLIN MUX (155MHz) 4 CLKOUTN 1 (155MHz PECLINN PECL 15 MUX OUTPUT) REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or Tel: 617/329-4700 World Wide Web Site: (T = T to T , V = V to V , C = 22 nF, unless otherwise noted) AD809SPECIFICATIONS A MIN MAX S MIN MAX D Parameter Condition Min Typ Max Units 1 TRACKING AND CAPTURE RANGE 8 Synthesis 19.42 19.46 MHz 16 Synthesis 9.71 9.73 MHz OUTPUT JITTER 8 Synthesis 1.6 2.9 Degrees RMS 16 Synthesis 1.6 2.9 Degrees RMS JITTER TRANSFER Bandwidth 200 kHz Peaking C = 5.6 nF ( = 5) 0.08 dB D C = 22 nF ( = 10) 0.02 dB D DUTY CYCLE TOLERANCE 8 or 16 Synthesis Output Jitter 2.9 Degrees RMS 15 85 % INPUT VOLTAGE LEVELS PECL Input Logic High, V CLKIN/N and 3.8 V Volts IH CC Input Logic Low, V PECLIN/N Inputs 3.1 3.6 Volts IL TTL Input Logic High, V TTL/CMOSIN 2.0 Volts IH Input Logic Low, V and MUX Inputs 0.8 Volts IL OUTPUT VOLTAGE LEVELS Referenced to V CC PECL Output Logic High, V 1.2 1.0 0.7 Volts OH Output Logic Low, V 2.0 1.8 1.7 Volts OL SYMMETRY (Duty Cycle) 8 Synthesis or 46 52 62 % 16 Synthesis % OUTPUT RISE/FALL TIMES 1.5 Rise Time (t ) 20%80% 1.1 1.5 ns R Fall Time (t ) 80%20% 1.1 1.5 ns F POWER SUPPLY VOLTAGE V to V 4.5 5.5 Volts MIN MAX POWER SUPPLY CURRENT 17 26 mA OPERATING TEMPERATURE RANGE T to T 40 +85 C MIN MAX NOTES 1 Device design is guaranteed for operation over Capture Ranges and Tracking Ranges, however the device has wider capture and tracking ranges (for both 8 and 16 synthesis). Specifications subject to change without notice. ABSOLUTE MAXIMUM RATINGS* Supply Voltage +12 V ON TIME t ON Input Voltage (Pin 12 or Pin 13) V + 0.6 V CC Maximum Junction Temperature . +165C Storage Temperature Range .65C to +150C OUTPUT 50% (PINS 4 & 5) Lead Temperature Range (Soldering 10 sec) +300C ESD Rating (Human Body Model) 1500 V PERIOD *Stresses above those listed under Absolute Maximum Ratings may cause SYMMETRY = (100 t /) ON permanent damage to the device. This is a stress rating only functional operation of the device at these or any other conditions above those indicated in the Figure 1. Symmetry operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Thermal Characteristics: 16-Pin Narrow Body SOIC Package: = 110C/W. JA ORDERING GUIDE Model Temperature Range Package Description Package Option AD809BR 40C to +85C 16-Pin Narrow Body SOIC R-16A AD809BR-REEL7 40C to +85C 750 Pieces, 7 Reel R-16A 2 REV. A