ADN2890ACPZ-RL Analog Devices Inc, ADN2890ACPZ-RL Datasheet

IC,Application Specific Amplifier,SINGLE,LLCC,16PIN,PLASTIC

ADN2890ACPZ-RL

Manufacturer Part Number
ADN2890ACPZ-RL
Description
IC,Application Specific Amplifier,SINGLE,LLCC,16PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADN2890ACPZ-RL

Amplifier Type
Limiting
Number Of Circuits
1
Output Type
Differential
Voltage - Input Offset
100µV
Current - Supply
39mA
Voltage - Supply, Single/dual (±)
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-LFCSP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output / Channel
-
-3db Bandwidth
-
Slew Rate
-
Gain Bandwidth Product
-
Current - Input Bias
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
SFP reference design available
Input sensitivity: 3 mV p-p
80 ps rise/fall times
CML outputs: 700 mV p-p differential
Programmable LOS detector: 2 mV to 13 mV
Rx signal strength indicator (RSSI):
Single-supply operation: 3.3 V
Low power dissipation: 130 mW
Available in space-saving 3 mm × 3 mm 16-lead LFCSP
APPLICATIONS
SFP/SFF/GBIC optical transceivers
OC-3/12/48, GbE, Fibre Channel receivers
10GBASE-LX4 transceivers
WDM transponders
Rev. 0
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.
SFF-8472 compliant average power measurement
C
F
R
F
ADN2880
PD_CATHODE
PD_VCC
FUNCTIONAL BLOCK DIAGRAM
PIN
NIN
CAZ1
50Ω
ADN2890
AVCC
0.01
50Ω
Figure 1.
µ
3kΩ
AVEE
F
CAZ2
V
REF
GENERAL DESCRIPTION
The ADN2890 is a high gain, limiting amplifier optimized for
use in SONET, Gigabit Ethernet (GbE), and Fibre Channel
optical receivers that accept input levels of up to 2.0 V p-p
differential and have 3 mV p-p differential input sensitivity. The
ADN2890 provides the receiver functions of quantization and
loss of signal (LOS) detection. The ADN2890 can easily operate
at up to 3.2 Gb/s to support LX4 transceivers.
The limiting amplifier also measures average received power
based on a direct measurement of the photodiode current with
better than 1 dB of accuracy over the entire input range of the
receiver. This eliminates the need for external average Rx power
detection circuitry in SFF-8472 compliant optical transceivers.
The ADN2890 limiting amplifier operates from a single 3.3 V
supply, has low power dissipation, and is available in a space-
saving 3 mm × 3 mm 16-lead lead frame chip scale package
(LFCSP).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
DETECTOR
RSSI/LOS
DRVCC
DRVCC
THRADJ
50Ω
DRVEE
SQUELCH
50Ω
LOS
RSSI_OUT
© 2004 Analog Devices, Inc. All rights reserved.
OUTP
OUTN
+V
10k
Limiting Amplifier
ADuC7020
3.3 V 2.7 Gb/s
ADN2890
www.analog.com

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ADN2890ACPZ-RL Summary of contents

Page 1

FEATURES SFP reference design available Input sensitivity p rise/fall times CML outputs: 700 mV p-p differential Programmable LOS detector signal strength indicator (RSSI): SFF-8472 compliant average power measurement Single-supply operation: ...

Page 2

ADN2890 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 Theory of Operation ........................................................................ 8 LIMAMP ....................................................................................... 8 REVISION HISTORY Revision 0: ...

Page 3

SPECIFICATIONS VCC = VEE = MIN MAX A MIN Table 1. Parameter QUANTIZER DC CHARACTERISTICS Input Voltage Range Input Common Mode Peak-to-Peak Differential Input Range Input Sensitivity Input Offset Voltage Input ...

Page 4

ADN2890 Parameter LOGIC OUTPUTS (LOS Output High Voltage Output Low Voltage OL Min Typ Max 2.4 0.4 Rev Page Unit Test Conditions/Comments V Open drain output, 4.7 kΩ − 10 ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Minimum Input Voltage (All Inputs) Maximum Input Voltage (All Inputs) Storage Temperature Operating Temperature Range Lead Temperature Range (Soldering 10 s) Junction Temperature ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges ...

Page 6

ADN2890 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Note: There is an exposed pad on the bottom of the package that must be connected to the GND plane with filled vias. Table 4. Pin Function Descriptions Pin No. Mnemonic 1 AVCC 2 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 0.96 0.88 0.80 0.72 0.64 0.56 0.48 0.40 0.32 0.24 0.16 0. 0.1 0.2 0.3 0.4 0.5 0.6 RSSI_IN (mA) Figure 3. RSSI Output vs. Average PIN Photodiode Current 0.014 0.012 0.010 0.008 0.006 0.004 ...

Page 8

ADN2890 THEORY OF OPERATION LIMAMP Input Buffer The limiting amplifier has differential inputs (PIN/NIN), with an internal 50 Ω termination. The ROSA (receive optical sub- assembly) is typically ac-coupled to the ADN2890 inputs, although dc coupling is possible. An internal ...

Page 9

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 10

ADN2890 PCB Layout Figure 9 shows a recommended PC board layout. Use of 50 Ω transmission lines is required for all high frequency input and output signals to minimize reflections: PIN, NIN, OUTP and OUTN also necessary for ...

Page 11

OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range ADN2890ACP –40°C to +85°C ADN2890ACP-RL –40°C to +85°C ADN2890ACP-RL7 –40°C to +85°C 3.00 0.60 MAX BSC SQ 13 0.45 12 2.75 TOP VIEW ...

Page 12

ADN2890 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04509–0–5/04(0) Rev Page ...

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