M02097-11 Datasheet, PDF (1/21 Pages) M/A-COM Technology Solutions, Inc. – 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.
M02097-11/-21
3.3/5V LED Driver / Limiting Amplifier
for Operation to 500 Mbps
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 V_CC 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.
Applications
Features (con’t)
• 155Mbps LAN ATM Transceivers
• Temperature compensation for modulation current
• ESCON Receivers
• Pre-bias adjustment to improve LED edge speed
• Fast Ethernet/FDDI
• SFP compliant safety circuitry (configurable)
• Multimode LED Transmitters
• 6mV input limiting amp sensitivity at 500 Mbps.
• SFP Transceivers
• PECL limiting amplifier outputs
• IEEE 1394 S100, S200 and S400 Transceivers
• Limiting amplifier includes integrated DC offset cancellation circuit
• Polarity Control for both the driver and limiting amplifier data paths
Features
• Operates with 3.3V or 5V supply with an internal auto-sensing
• High speed operation; suitable for applications to 500 Mbps. 200 ps
typical rise/fall time into 5Ω.
regulator that enables with 5V supplies and is bypassed with 3.3V
supplies
• Programmable modulation current to 120 mA
• Integrated power supply switch for redundant shutdown under a
• Powers 3.3V ROSAs from its Receiver Regulator output enabling true
3.3/5V designs using all 3.3V Mindspeed TIAs
fault condition
M02097 Block Diagram
VCCR
VCC3R
STSET
RxOUTp
RxOUTm
LOS-ST
PECL
Output
Buffer
Regulator
with Bypass
Threshold
Setting
Circuit
Offset Cancel
Limiting
Amplifier
2kΩ _Vttr
2kΩ
Rx_Polarity
PECL (-11)
CMOS/TTL
(-21 )
LOS-ST_sel
LOS
Comparator
LOS-to-JAM ^DCR_Disable
VCCT
TCSTART
TCSLOPE
MODSET
Modulation
Control
To Safety
Logic
Level
Detect
RSSI
3.3V Regulator
with Bypass
Biasing
To Safety
Logic
DIN+
DIN-
CONFIG_1
CONFIG_2
CONFIG_3
CONFIG_4
GND
4 kΩ
Vttx
4kΩ
Input
Buffer
Output
Buffer
Tx_Polarity
Rx_Polarity
Tx_Polarity
VCC VCC3
Configuration
Logic
DCR_Disable
LOS-to-JAM
SCB
Safety
Circuitry with
TX
Latched Fault
LOS-ST_sel
Disable
RESET
Laser
Driver
LED Pre-Bias Control
RxINp
RxINm
Iref
VCC3T
SVCC
OUT-
OUT+
GND0
PBOUT
02097-DSH-001-C
Mindspeed Technologies^®
Preliiminary Information/Mindspeed Proprietary and Confidential
November 2006