Texas Instruments TLK10002SMAEVM Evaluation Module TLK10002SMAEVM TLK10002SMAEVM 데이터 시트
제품 코드
TLK10002SMAEVM
TLK10002EVM Kit Contents
•
The entire board can be powered from a single, 5-V power supply where the power planes can be
supplied through onboard regulators or through separate headers for isolation.
supplied through onboard regulators or through separate headers for isolation.
•
Onboard capacitors provide ac coupling of high-speed transmit and receive signals.
•
Voltage monitoring LED circuits provide quick indication that the voltage is within specification.
•
Provisions are included for use of an onboard CDCE72010 jitter cleaner to supply a reference clock
signal. Note that by default the hardware is configured for external reference clocks only.
signal. Note that by default the hardware is configured for external reference clocks only.
3
TLK10002EVM Kit Contents
The TLK10002EVM kit contains the following:
•
TLK10002EVM motherboard
•
TLK10002EVM User
’
s Guide (this document)
•
TLK10002 data sheet
•
CD-ROM containing user interface software and user guides
The following two daughterboards may be ordered separately for evaluation of the TLK10002 low-speed
side:
side:
•
TLK10002EVM FPGA daughterboard
•
TLK10002EVM SMA breakout daughterboard
4
Power
The TLK10002EVM can be operated off of a single, 5-V power supply with a 2.5-A or greater current
rating, using the onboard, low-dropout (LDO) voltage regulators to generate the voltages required to
correctly operate the TLK10002's 1-V and 1.5-V/1.8-V power rails. Additional 2.5-V and 3.3-V supplies
have been added to support additional circuitry on the EVM board. Two-pin headers allow external
laboratory power supplies to be used instead of the onboard LDO regulators if the ferrite beads at the
source of the split planes are also removed. The LDO regulators used on the EVM are TI
rating, using the onboard, low-dropout (LDO) voltage regulators to generate the voltages required to
correctly operate the TLK10002's 1-V and 1.5-V/1.8-V power rails. Additional 2.5-V and 3.3-V supplies
have been added to support additional circuitry on the EVM board. Two-pin headers allow external
laboratory power supplies to be used instead of the onboard LDO regulators if the ferrite beads at the
source of the split planes are also removed. The LDO regulators used on the EVM are TI
’
s TPS74401 and
are adjustable using a resistor divider between the output and a feedback pin. Each regulator has been
set to provide the appropriate voltage with a slightly higher margin at the source to account for IR drop
across the board. If more information on the use of these regulators is desired, consult the regulator data
sheets found at
set to provide the appropriate voltage with a slightly higher margin at the source to account for IR drop
across the board. If more information on the use of these regulators is desired, consult the regulator data
sheets found at
.
Several power supplies such as VDDRA_LS, VDDRB_LS, VDDRA_HS, VDDRB_HS, and VDDO can be
operated off of either 1.5 V or 1.8 V depending on your specific setup. The EVM is designed to allow
either of these voltages to be selected for use with the previously mentioned TLK10002 supply rails, but
only allows either 1.5 V or 1.8 V to be selected at a time without some board modifications. Selection
between 1.5 V and 1.8 V is performed by moving the jumper between the center pin and the respective
1p5V and 1p8V pins of JMP35.
operated off of either 1.5 V or 1.8 V depending on your specific setup. The EVM is designed to allow
either of these voltages to be selected for use with the previously mentioned TLK10002 supply rails, but
only allows either 1.5 V or 1.8 V to be selected at a time without some board modifications. Selection
between 1.5 V and 1.8 V is performed by moving the jumper between the center pin and the respective
1p5V and 1p8V pins of JMP35.
The 0-
Ω
resistors are located at the entrance point of each power plane and can be replaced with a ferrite
bead of an appropriate value depending on the desired data rate if desired. See
and
of the TLK10002EVM Schematics for more specific information on how all the power planes are
connected and sourced from either the regulators or external headers.
connected and sourced from either the regulators or external headers.
4.1
Power Monitoring LEDs
Each plane of the TLK10002EVM has been equipped with a voltage monitoring circuit that monitors the
voltage on the plane and lights the LEDs when the voltage is within the minimum/maximum data sheet
limits for that power supply. A precision TI voltage reference chip is used along with 0.1% precision
resistors to set minimum and maximum reference levels, providing a detection circuit that is accurate to
approximately
voltage on the plane and lights the LEDs when the voltage is within the minimum/maximum data sheet
limits for that power supply. A precision TI voltage reference chip is used along with 0.1% precision
resistors to set minimum and maximum reference levels, providing a detection circuit that is accurate to
approximately
±
10 mV. The LEDs can be used as a basic indication of the status of power on the board
being within the acceptable minimum/maximum limits given in the data sheet and not as a precise
measurement tool, as some LED circuits may turn off at slightly different voltages when approaching the
limits due to the manufacturing tolerances and available component values. If the LEDs fail to light, a
problem exists with the voltage on the board that can result in damage to the board if the problem is not
resolved.
measurement tool, as some LED circuits may turn off at slightly different voltages when approaching the
limits due to the manufacturing tolerances and available component values. If the LEDs fail to light, a
problem exists with the voltage on the board that can result in damage to the board if the problem is not
resolved.
6
TLK10002 Dual-Channel, 10-Gbps, Multi-Rate Transceiver Evaluation Module
SLLU148
–
May 2011
Copyright
©
2011, Texas Instruments Incorporated