The AD807 provides the receiver functions of data quantization, signal level detect, clock recovery and data retiming for 155 Mbps NRZ data. The device, together with a PIN diode/preamplifier combination, can be used for a highly integrated, low cost, low power SONET OC-3 or SDH STM-1 fiber optic receiver.

The receiver front end signal level detect circuit indicates when the input signal level has fallen below a user adjustable threshold. The threshold is set with a single external resistor. The signal level detect circuit 3 dB optical hysteresis prevents chatter at the signal level detect output.

The PLL has a factory trimmed VCO center frequency and a frequency acquisition control loop that combine to guarantee frequency acquisition without false lock. This eliminates a reliance on external components such as a crystal or a SAW filter, to aid frequency acquisition.

The AD807 acquires frequency and phase lock on input data using two control loops that work without requiring external control. The frequency acquisition control loop initially acquires the frequency of the input data, acquiring frequency lock on random or scrambled data without the need for a preamble. At frequency lock, the frequency error is zero and the frequency detector has no further effect. The phase acquisition control loop then works to ensure that the output phase tracks the input phase. A patented phase detector has virtually eliminated pattern jitter throughout the AD807.

The device VCO uses a ring oscillator architecture and patented low noise design techniques. Jitter is 2.0 degrees rms. This low jitter results from using a fully differential signal architecture, Power Supply Rejection Ratio circuitry and a dielectrically isolated process that provides immunity from extraneous signals on the IC. The device can withstand hundreds of millivolts of power supply noise without an effect on jitter performance.

The user sets the jitter peaking and acquisition time of the PLL by choosing a damping factor capacitor whose value determines loop damping. CCITT G.958 Type A jitter transfer requirements can easily be met with a damping factor of 5 or greater.

Device design guarantees that the clock output frequency will drift by less than 20% in the absence of input data transitions. Shorting the damping factor capacitor, CD, brings the clock output frequency to the VCO center frequency.

The AD807 consumes 140 mW and operates from a single power supply at either +5 V or –5.2 V.

Part#	Voltage Supply (V)	Data Rate (Gb/s)	Power Dissipation (mW)	Input Sensitivity (mVp-p)	Jitter Tolerance (Ulpp)	Jitter Transfer	Jitter Gen (mUI rms)	Rate	Package	Price* (1000-4999)
AD800	-5.5	156	-	80	.9 UI @ 65 kHz	-	-	-	20-Lead SOIC	$20.79
AD807	+5	0.155	170	2	1.0 @ 65 kHz	92 kHz	5	Single	16-Lead SOIC	$11.05
AD808	+5	0.622	400	4	0.6 @ 250 kHz	333 kHz	7	Single	16-Lead SOIC	$11.34
ADN2804	+3.3	0.622	420	3	1.0 @ 250 kHz	71 kHz @ OC12	1	Single	5x5 mm LFCSP	$9.88
ADN2806	+3.3	0.622	360	200	1.0 @ 250 kHz	71 kHz @ OC12	1	Single	5x5 mm LFCSP	$9.13
ADN2807	+3.3	0.622	500	4	1.0 @ 250 kHz	140 kHz @ OC12	1	Multi	7x7 mm LFCSP	$11.50
ADN2811	+3.3	2.7	500	4	1.0 @ 1 MHz	590 kHz @ OC48	2	Single	7x7 mm LFCSP	$37.00
ADN2812	+3.3	2.7	750	6	1.0 @ 1 MHz	490 kHz @ OC48	1	Continous	5x5 mm LFCSP	$54.00
ADN2813	+3.3	1.25	375	6	1UI @ 637 kHz	71 kHz @ OC12	1	Continous	5x5 mm LFCSP	$19.50
ADN2814	+3.3	0.675	350	6	1.0 @ 250 kHz	71 kHz @ OC12	1	Continous	5x5 mm LFCSP	$11.50
ADN2815	+3.3	1.25	300	6	1.0 @ 250 kHz	71 kHz @ OC12	1	Continous	5x5 mm LFCSP	$17.55
ADN2816	+3.3	0.675	300	4	1.0 @ 250 kHz	71 kHz @ OC12	1	Continous	5x5 mm LFCSP	$10.35
ADN2817	+3.3	2.7	650	5	1.0 @ 1 MHz	500 kHz @ OC48	1	Continous	5x5 mm LFCSP	$43.74
ADN2818	+3.3	2.7	600	200	1.0 @ 1 MHz	500 kHz @ OC48	1	Continous	5x5 mm LFCSP	$41.55
ADN2819	+3.3	2.7	500	4	1.0 @ 1 MHz	590 kHz @ OC48	2	Multi	7x7 mm LFCSP	$45.00
ADN2865	+3.3	2.7	1200	6	-	-	-	Continous	-	-

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.