MAX3805EVKIT [MAXIM]
Evaluation Kit for the MAX3805 ; 评估板MAX3805\n
| 型号： | MAX3805EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Evaluation Kit for the MAX3805
|
| 文件： | 总5页 (文件大小：180K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2965; Rev 0; 8/03
MAX3805 Evaluation Kit
_______________ General Description
_________________________Features
The MAX3805 DC-coupled evaluation kit (EV kit)
simplifies evaluation of the MAX3805 10.7Gbps adaptive
equalizer. The EV kit enables full testing of device
♦
DC-Coupled Evaluation Kit
♦
SMA Connectors for All High-Speed Inputs and
Outputs
functions.
SMA connectors with 50Ω controlled-
impedance transmission lines to the MAX3805 are
provided for all CML input and output ports.
♦
Fully Assembled and Tested
_______________Ordering Information
________________________ Quick Start
PART
TEMP. RANGE IC PACKAGE
16 QFN
Note: The MAX3805 EV kit is a DC-coupled evaluation
board. Use external coupling capacitors on the
input and output when AC-coupling is desired.
DC-coupled operation with positive VCC supplies
can cause permanent damage to laboratory test
equipment (oscilloscope, BERT). The MAX3805
EV kit must be operated from a negative VEE
supply when DC-coupled to normal laboratory
equipment.
MAX3805EVKIT -40°C to +85°C
____________________ Component List
DESIGNATION QTY
DESCRIPTION
0.1µF +10% ceramic capacitor
5
C1-C5
(0402)
0.1µF +10% ceramic capacitor
1
C6
(0603)
1) Connect a –3.3V power supply to VEE. Connect the
33µF +10% tantalum
power supply ground to GND and VCC
.
Remove
4
C7-C10
capacitors (case-B)
shunt on JP1; install shunts on JP2 and JP3.
4
J1-J4
SMA connectors, tab contact
2-pin headers, 0.1in centers
5
2) Connect TP9 to TP10.
JP1-JP5
GND, VCC, VCC1
,
Test points
9
VCC2, VEE, TP4,
TP5, TP9, TP10
3) Apply
a
differential 9.953Gbps input signal
Digi-Key 5000K-ND
(400mVP-P to 1200mVP-P) between SMA connectors
J1 and J2, (SDI+ and SDI-)
R7
U1
None
None
None
1
1
3
1
1
500kΩ Variable resistor
MAX3805 ETE
Shunts
MAX3805 EV board
MAX3805 data sheet
4) Attach a differential high-speed oscilloscope with a
50Ω input to SMA connectors J4 and J3 (SDO+ and
SDO-) to observe the output of the equalizer.
______________ Component Suppliers
SUPPLIER
Digi-Key
Murata
Coilcraft
AVX
PHONE
FAX
218-681-6674
814-237-1431
847-639-6400
803-946-0690
218-681-3380
814-238-0490
847-639-1469
803-626-3123
Note: Please indicate that you are using the MAX3805
when ordering from these suppliers.
_________________________________________________________________Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX3805 Evaluation Kit
_Alternative Supply Configurations
DC-Coupled Operation
_____with Oscilloscope and BERTs
AC-Coupled Operation with
VCC1 = VCC2 = +1.8V
The MAX3805 is designed with DC-coupled inputs and
outputs, implemented with internal 50Ω terminations to
VCC1 (SDI+) and VCC2 (SDO+). Laboratory oscilloscopes
and BERTs normally terminate their inputs and outputs
with 50Ω to ground. When the MAX3805 VCCs are
connected to positive supply, a DC path exists from the
power supply to the ports of the oscilloscope or BERT.
This configuration can cause permanent damage to the
oscilloscope or BERT.
Connect a +3.3V power supply to VCC. Connect a +1.8V
power supply to VCC1 and VCC2
.
Connect the power-
supply ground to GND. Remove shunts JP2 and JP3.
Install shunt JP1. Use external AC-coupling capacitors
for connecting to external laboratory equipment
(oscilloscope, BERT).
DC-Coupled Operation with
Laboratory Equipment
When the MAX3805 EV kit is being used with normal
oscilloscopes or BERTs, either external AC-coupling
must be provided or VCC1 and VCC2 must be connected to
ground (i.e., using a negative VEE supply). Failure to do
so may permanently damage laboratory equipment.
Connect a +1.5V power supply to VCC
.
Connect a
-1.8V power supply to VEE
. Connect the power-supply
ground to GND. Install shunts on JP2 and JP3. Remove
shunt on JP1. With this setup the part can be DC-
coupled to external laboratory equipment (oscilloscope,
BERT)
Figure 1. MAX3805 EV kit Schematic
2________________________________________________________________________________
.
MAX3805 Evaluation Kit
Figure 2. MAX3805 Component Placement Guide
Figure 3. MAX3805 PC Board Layout –
Component Side
_________________________________________________________________________________________
3
MAX3805 Evaluation Kit
Figure 4. MAX3805 PC Board Layout – Ground
Plane
Figure 5. MAX3805 PC Board Layout – Power
Plane
4________________________________________________________________________________
.
MAX3805 Evaluation Kit
Figure 6. MAX3805 PC Board Layout – Solder
Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ________________ 5
2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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