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PDF ADN2892 Data sheet ( Hoja de datos )
| Número de pieza | ADN2892 | |
| Descripción | Limiting Amplifier | |
| Fabricantes | Analog Devices | |
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Preliminary Technical Data
3.3 V 4.25 Gb/s
Limiting Amplifier
ADN2892
FEATURES
SFP reference design available
Input sensitivity: 3 mV p-p
65 ps rise/fall times
BW Select to support Multi-Rate 1x/2x/4x FC modules
Optional LOS Output Inversion to support SFF
The ADN2892 is a high gain, limiting amplifier optimized for
use in Fibre Channel and GbE optical receivers. The ADN2892
accepts input levels of up to 2.0 V p-p differential and has 3 mV
p-p differential input sensitivity. The ADN2892 provides the
receiver functions of quantization and loss of signal (LOS)
detection.
CML outputs: 700 mV p-p differential
Programmable LOS detector: 3 mV to 45 mV
Rx signal strength indicator (RSSI):
SFF-8472 compliant average power measurement
Single supply operation: 3.3 V
Low power dissipation: 160 mW
Available in space-saving 3 × 3 mm 16-lead LFCSP
The ADN2892 has an on-chip selectable filter to reduce the BW
of the limamp to 1.5GHz in order to filter out the relaxation
oscillation of legacy 1Gb/s Fiber Channel transmitters with CD
lasers. The reduced BW will also allow for more optical Rx
sensitivity margin at the lower data rates such as 1xFC and
1GbE in multi-rate modules.
Increased Temperature Range: -40oC to 95oC
APPLICATIONS
SFP/SFF/GBIC optical transceivers
1x/2x/4x Multi-rate Fibre Channel receivers
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.
LX4
WDM transponders
The ADN2892 limiting amplifier operates from a single 3.3 V
supply, has low power dissipation, and is available in a space-
saving 3 × 3 mm 16-lead lead frame chip scale package
(LFCSP).
PRODUCT OVERVIEW
FUNCTIONAL BLOCK DIAGRAM
ADN2882
PD_VCC
PD_CATHODE
VREF
+V
10kΩ
ADuC7020
Figure 1.
Rev. PrA.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
1 page  
Preliminary Technical Data
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Rating
Supply Voltage
Minimum Input Voltage (All Inputs)
Maximum Input Voltage (All Inputs)
Storage Temperature
4.2 V
VEE − 0.4 V
VCC + 0.4 V
−65°C to +155°C
Operating Temperature Range
−40°C to +95°C
Lead Temperature Range (Soldering 10 s) 300°C
Junction Temperature
125°C
ADN2892
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θJA is specified for 4-layer PCB with exposed paddle soldered
to GND.
Table 3.
Package Type
16-lead 3 × 3 mm LFCSP
θJA Unit
28 °C/W
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. PrA | Page 5 of 12
5 Page 
Preliminary Technical Data
OUTLINE DIMENSIONS
ADN2892
3.00
BSC SQ
0.60 MAX
0.50
0.40
0.30
PIN 1
INDICATOR
TOP
VIEW
2.75
BSC SQ
0.45
0.50
BSC
1213 16 1
BOTTOM
VIEW
98 54
12° MAX
1.00
0.85
0.80
SEATING
PLANE
0.30
0.23
0.18
0.80 MAX
0.65 TYP
1.50 REF
0.05 MAX
0.02 NOM
0.20 REF
*COMPLIANT TO JEDEC STANDARDS MO-220-VEED-2
EXCEPT FOR EXPOSED PAD DIMENSION
PIN 1
INDICATOR
1.45
1.30 SQ*
1.15
0.25 MIN
Figure 10. 16-Lead Lead Frame Chip Scale Package [LFCSP]
3 × 3 mm Body
(CP-16-2)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADN2892ACP-RL
ADN2892ACP-RL7
Temperature Range
–40°C to +95°C
–40°C to +95°C
Package Description
16-LFCSP
16-LFCSP
Package Option
CP-16-2
CP-16-2
Rev. PrA | Page 11 of 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADN2892.PDF ] | |
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