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M02097-12 Scheda tecnica(PDF) 1 Page - List of Unclassifed Manufacturers

Il numero della parte M02097-12
Spiegazioni elettronici  Temperature compensation for modulation current
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02097-DSH-001-C
Mindspeed Technologies
®
November 2006
Preliiminary Information/Mindspeed Proprietary and Confidential
M02097-11/-21
3.3/5V LED Driver / Limiting Amplifier
for Operation to 500 Mbps
Preliminary Information
This document contains information on a new product. The parametric information, although not
fully characterized, is the result of testing initial devices.
Applications
• 155Mbps LAN ATM Transceivers
• ESCON Receivers
• Fast Ethernet/FDDI
• Multimode LED Transmitters
• SFP Transceivers
• IEEE 1394 S100, S200 and S400 Transceivers
Features
• High speed operation; suitable for applications to 500 Mbps. 200 ps
typical rise/fall time into 5
Ω.
• Programmable modulation current to 120 mA
• Integrated power supply switch for redundant shutdown under a
fault condition
The M02097 is an integrated LED driver and limiting amplifier for applications to 500 Mbps. The LED driver
modulation output can be AC or DC coupled to an LED. The device can operate from a 3.3V or 5V supply.
The M02097 includes monitors for bias and modulation current. Integrated safety circuitry provides latched bias
and modulation current shutdown if a fault condition is detected and provides an internal VCC switch.
The limiting amplifier also includes a programmable signal-level detector, allowing the user to set thresholds at
which the logic outputs are enabled. The M02097-11 features a PECL LOS-ST output while the M02097-21
features a CMOS (external pull-up required) LOS-ST output. PECL outputs are available on the limiting amplifier.
Configuration logic provides flexibility in setting data path polarity, safety logic configuration, and LOS behavior.
M02097 Block Diagram
VCC3T
SVCC
OUT+
OUT-
GND0
PBOUT
Input
Buffer
DIN-
DIN+
TX
Disable
RESET
VCCT
GND
3.3V Regulator
with Bypass
To Safety
Logic
To Safety
Logic
VCC VCC3
Laser
Driver
MODSET
LED Pre-Bias Control
Threshold
Setting
Circuit
Biasing
RxOUTp
RxOUTm
RSSI
LOS-ST
RxINm
Iref
RxINp
VCCR
STSET
Offset Cancel
DCR_Disable
Limiting
Amplifier
SCB
Safety
Circuitry with
Latched Fault
Output
Buffer
Tx_Polarity
Rx_Polarity
CONFIG_2
Tx_Polarity
Rx_Polarity
CONFIG_3
CONFIG_1
DCR_Disable
TCSLOPE
TCSTART
LOS-to-JAM
CONFIG_4
LOS-to-JAM
LOS-ST_sel
LOS-ST_sel
LOS
Level
Detect
Comparator
VCC3R
Configuration
Logic
Modulation
Control
Vttx
4k
4k
Vttr
2k
2k
Output
Buffer
Regulator
with Bypass
CMOS/TTL
(-21)
PECL (-11)
PECL
Features (con’t)
• Temperature compensation for modulation current
• Pre-bias adjustment to improve LED edge speed
• SFP compliant safety circuitry (configurable)
• 6mV input limiting amp sensitivity at 500 Mbps.
• PECL limiting amplifier outputs
• Limiting amplifier includes integrated DC offset cancellation circuit
• Polarity Control for both the driver and limiting amplifier data paths
• Operates with 3.3V or 5V supply with an internal auto-sensing
regulator that enables with 5V supplies and is bypassed with 3.3V
supplies
• Powers 3.3V ROSAs from its Receiver Regulator output enabling true
3.3/5V designs using all 3.3V Mindspeed TIAs


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