ONET4291PARGVRG4 Datasheet, PDF (1/24 Pages) Texas Instruments – 1-Gbps to 4.25-Gbps Rate-Selectable Limiting Amplifier

ONET4291PA
www.ti.com
SLLS671 – SEPTEMBER 2005
1-Gbps to 4.25-Gbps Rate-Selectable Limiting Amplifier
FEATURES
• Multirate Operation from 1 Gbps up to
4.25 Gbps
• Loss-of-Signal Detection (LOS)
• Two-Wire Digital Interface
• Digitally Selectable LOS Threshold
• Digitally Selectable Bandwidth
• Digitally Selectable Output Voltage
• Low Power Consumption
• Input Offset Cancellation
• CML Data Outputs With On-Chip, 50-Ω
Back-Termination to V_CC
• Single 3.3-V Supply
• Surface-Mount, Small-Footprint, 4-mm ×
4-mm, 16-Terminal QFN Package
APPLICATIONS
• Multirate SONET/SDH Transmission Systems
• 4.25-Gbps, 2.125-Gbps, and 1.0625-Gbps
Fibre-Channel Receivers
• Gigabit Ethernet Receivers
DESCRIPTION
The ONET4291PA is a versatile, high-speed, rate-selectable limiting amplifier for multiple fiber-optic applications
with data rates up to 4.25 Gbps.
The device provides a two-wire interface, which allows digital bandwidth selection, digital output amplitude
selection, and digital loss of signal threshold adjust.
This device provides a gain of about 43 dB, which ensures a fully differential output swing for input signals as low
as 5 mV_p-p.
The ONET4291PA provides loss-of-signal detection with either digital or analog threshold adjust.
The part is available in a small-footprint, 4-mm × 4-mm, 16-terminal QFN package. It requires a single 3.3-V
supply.
This power-efficient, rate-selectable limiting amplifier is characterized for operation from –40°C to 85°C ambient
temperature.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated