ADN2812ACPZ-RL7 Analog Devices, ADN2812ACPZ-RL7 Datasheet

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ADN2812ACPZ-RL7

Manufacturer Part Number
ADN2812ACPZ-RL7
Description
Manufacturer
Analog Devices
Datasheet

Specifications of ADN2812ACPZ-RL7

Dc
07+

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Part Number:
ADN2812ACPZ-RL7
Manufacturer:
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Quantity:
8 000
FEATURES
Serial data input: 12.3 Mb/s to 2.7 Gb/s
Exceeds SONET requirements for jitter transfer/
Quantizer sensitivity: 6 mV typical
Adjustable slice level: ±100 mV
Patented clock recovery architecture
Loss of signal (LOS) detect range: 3 mV to 15 mV
Independent slice level adjust and LOS detector
No reference clock required
Loss of lock indicator
I
Single-supply operation: 3.3 V
Low power: 750 mW typical
5 mm × 5 mm 32-lead LFCSP
APPLICATIONS
SONET OC-1/OC-3/OC-12/OC-48 and all associated FEC rates
Fibre Channel, 2× Fibre Channel, GbE, HDTV
WDM transponders
Regenerators/repeaters
Test equipment
Broadband cross-connects and routers
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
2
C interface to access optional features
generation/tolerance
SLICEP/N
VREF
NIN
PIN
THRADJ
QUANTIZER
2
DETECT
FUNCTIONAL BLOCK DIAGRAM
LOS
Continuous Rate 12.3 Mb/s to 2.7 Gb/s Clock and
LOS
Data Recovery IC with Integrated Limiting Amp
REFCLKP/N
(OPTIONAL)
DATAOUTP/N
RE-TIMING
SHIFTER
PHASE
DATA
2
Figure 1.
LOL
FREQUENCY
DETECT
DETECT
PHASE
CLKOUTP/N
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The ADN2812 provides the receiver functions of quantization,
signal level detect, and clock and data recovery for continuous
data rates from 12.3 Mb/s to 2.7 Gb/s. The ADN2812 auto-
matically locks to all data rates without the need for an external
reference clock or programming. All SONET jitter requirements
are met, including jitter transfer, jitter generation, and jitter
tolerance. All specifications are quoted for −40°C to +85°C
ambient temperature, unless otherwise noted.
This device, together with a PIN diode and a TIA preamplifier,
can implement a highly integrated, low cost, low power fiber
optic receiver.
The receiver front end, loss of signal (LOS) detector circuit
indicates when the input signal level has fallen below a user-
adjustable threshold. The LOS detect circuit has hysteresis to
prevent chatter at the output.
The ADN2812 is available in a compact 5 mm × 5 mm 32-lead
lead frame chip scale package (LFCSP).
2
CF1
FILTER
FILTER
LOOP
LOOP
CF2
©2004–2007 Analog Devices, Inc. All rights reserved.
VCC
VCO
VEE
ADN2812
www.analog.com

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ADN2812ACPZ-RL7 Summary of contents

Page 1

... Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. ...

Page 2

ADN2812 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Jitter Specifications....................................................................... 4 Output and Timing Specifications ............................................. 5 Absolute Maximum Ratings............................................................ 6 Thermal Characteristics .............................................................. ...

Page 3

SPECIFICATIONS VCC = VEE = MIN MAX MIN MAX unless otherwise noted. Table 1. Parameter QUANTIZER—DC CHARACTERISTICS Input Voltage Range Peak-to-Peak Differential Input Input Common-Mode Level ...

Page 4

ADN2812 Parameter DATA RATE READBACK ACCURACY Coarse Readback Fine Readback POWER SUPPLY VOLTAGE POWER SUPPLY CURRENT OPERATING TEMPERATURE RANGE 1 PIN and NIN should be differentially driven and ac-coupled for optimum sensitivity. 2 When ac-coupled, the LOS assert and deassert ...

Page 5

OUTPUT AND TIMING SPECIFICATIONS Table 3. Parameter CML OUPUT CHARACTERISTICS (CLKOUTP/CLKOUTN, DATAOUTP/DATAOUTN) Single-Ended Output Swing Differential Output Swing Output High Voltage Output Low Voltage CML Outputs Timing Rise Time Fall Time Setup Time Hold Time 2 I C® INTERFACE DC ...

Page 6

ADN2812 ABSOLUTE MAXIMUM RATINGS VCC = VEE = MIN MAX MIN MAX SLICEP = SLICEN = VEE, unless otherwise noted. Table 4. Parameter Supply Voltage (VCC) ...

Page 7

TIMING CHARACTERISTICS CLKOUTP DATAOUTP/N OUTP V OUTN OUTP – OUTN Figure 2. Output Timing CML DIFF Figure 3. Single-Ended vs. Differential Output Specifications Rev Page ADN2812 V ...

Page 8

ADN2812 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Type 1 TEST1 2 VCC P 3 VREF AO 4 NIN AI 5 PIN AI 6 SLICEP AI 7 SLICEN AI 8 VEE P 9 THRADJ ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS 100 1k R (Ω) Thresh Figure 5. LOS Comparator Trip Point Programming 1000 100 10 1 0.1 10k 100k 1 Figure 6. Typical Measured Jitter Tolerance OC-48 ...

Page 10

ADN2812 INTERFACE TIMING AND INTERNAL REGISTER DESCRIPTION S SLAVE ADDR, LSB = 0 (WR) A(S) S SLAVE ADDR, LSB = 0 (WR START BIT A(S) = ACKNOWLEDGE BY SLAVE START BIT SLAVE ADDRESS SDA A6 ...

Page 11

Table 6. Internal Register Map Reg. Name R/W Address FREQ0 R 0x00 FREQ1 R 0x01 FREQ2 R 0x02 RATE R 0x03 MISC R 0x04 CTRLA W 0x08 CTRLA_RD R 0x05 CTRLB W 0x09 CTRLB_RD R 0x06 CTRLC W 0x11 ...

Page 12

ADN2812 TERMINOLOGY INPUT SENSITIVITY AND INPUT OVERDRIVE Sensitivity and overdrive specifications for the quantizer involve offset voltage, gain, and noise. The relationship between the logic output of the quantizer and the analog voltage input is shown in Figure 12. For ...

Page 13

JITTER SPECIFICATIONS The ADN2812 CDR is designed to achieve the best bit-error- rate (BER) performance and exceeds the jitter transfer, generation, and tolerance specifications proposed for SONET/SDH equip- ment defined in the Telcordia Technologies GR-253-CORE document. Jitter is the dynamic ...

Page 14

ADN2812 THEORY OF OPERATION The ADN2812 is a delay- and phase-locked loop circuit for clock recovery and data retiming from an NRZ encoded data stream. The phase of the input data signal is tracked by two separate feedback loops that ...

Page 15

At medium jitter frequencies, the gain and tuning range of the VCO are not large enough to track input jitter. In this case, the VCO control voltage becomes large and saturates, and the VCO frequency dwells at one extreme of ...

Page 16

ADN2812 FUNCTIONAL DESCRIPTION FREQUENCY ACQUISITION The ADN2812 acquires frequency from the data over a range of data frequencies from 12.3 Mb/s to 2.7 Gb/s. The lock detector circuit compares the frequency of the VCO and the frequency of the incoming ...

Page 17

LOL 1 –1000 –250 0 250 Figure 20. Transfer Function of LOL LOL Detector Operation Using a Reference Clock (REFCLK Mode) In REFCLK mode, a reference clock is used as an acquisition aid to lock the ADN2812 VCO. Lock to ...

Page 18

ADN2812 INTERFACE 2 The ADN2812 supports a 2-wire, I C-compatible, serial bus driving multiple peripherals. Two inputs, serial data (SDA) and serial clock (SCK), carry information between any devices connected to the bus. Each slave device is ...

Page 19

The two uses of the reference clock are mutually exclusive. The reference clock can be used either as an acquisition aid for the ADN2812 to lock onto data or to measure the frequency of the incoming data to within 0.01%. ...

Page 20

ADN2812 Prior to reading back the data rate using the reference clock, Control Register CTRLA Bits[7:6] bits must be set to the appropriate frequency range with respect to the reference clock being used. A fine data rate readback is then ...

Page 21

APPLICATIONS INFORMATION PCB DESIGN GUIDELINES Proper RF PCB design techniques must be used for optimal performance. Power Supply Connections and Ground Planes Use of one low impedance ground plane is recommended. The VEE pins should be soldered directly to the ...

Page 22

ADN2812 Transmission Lines Use of 50 Ω transmission lines is required for all high frequency input and output signals to minimize reflections: PIN, NIN, CLKOUTP, CLKOUTN, DATAOUTP, DATAOUTN (also REFCLKP, REFCLKN high frequency reference clock is used, such ...

Page 23

VCC TIA 1 V1 V1b V2 V2b V DIFF V = V2–V2b DIFF VTH = ADN2812 QUANTIZER THRESHOLD NOTES: 1. DURING DATA PATTERNS WITH HIGH TRANSITION DENSITY, DIFFERENTIAL DC VOLTAGE AT V1 AND V2 IS ZERO. 2. WHEN THE OUTPUT ...

Page 24

ADN2812 COARSE DATA RATE READBACK LOOK-UP TABLE Code is the 9-bit value read back from COARSE_RD[8:0]. Table 14. Code F Code MID 0 5.1934e+ 5.1930e+ 5.2930e+ 5.3989e+ 5.5124e+ 5.6325e+06 53 ...

Page 25

Code F Code MID 192 3.3238e+08 216 193 3.3235e+08 217 194 3.3876e+08 218 195 3.4553e+08 219 196 3.5279e+08 220 197 3.6048e+08 221 198 3.6872e+08 222 199 3.7757e+08 223 200 3.8703e+08 224 201 3.9742e+08 225 202 4.0844e+08 226 203 4.2032e+08 227 ...

Page 26

... Temperature Range ADN2812ACP −40°C to 85°C ADN2812ACP-RL −40°C to 85°C ADN2812ACP-RL7 −40°C to 85°C 1 ADN2812ACPZ −40°C to 85°C 1 ADN2812ACPZ-RL −40°C to 85°C 1 ADN2812ACPZ-RL7 −40°C to 85°C 1 EVAL-ADN2812-EBZ RoHS Compliant Part. 5.00 BSC SQ 0.60 MAX 24 0.50 BSC TOP 4.75 ...

Page 27

NOTES Rev Page ADN2812 ...

Page 28

... ADN2812 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, provided that the system conforms to the I ©2004–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...

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