|
|
Part: MAX3681EVKIT-SO
Category:
Communication
-> Fiber Optics
Description: MAX3681EVKIT Evaluation Kit For The MAX3681
Company: Maxim Integrated Products
Datasheet: Download MAX3681EVKIT-SO datasheet File size : 416 kB
Request For quote: Find where to buy MAX3681EVKIT-SO
Datasheet text preview:
19-1111; Rev 0; 8/96
MAX3681 Evaluation Kit
_______________General Description
The MAX3681 evaluation kit (EV kit) simplifies evaluation of the MAX3681 622Mbps, SDH/SONET 1:4 deserializer. The EV kit requires only a single +3.3V supply and includes all the external components necessary to interface with 3.3V PECL and LVDS logic. The board can be connected directly to the output of a clock-anddata-recovery circuit (such as the MAX3675) and to the input of an LVDS device (such as an overhead termination circuit). A signal generator or stimulus system can b e used with an oscilloscope, to evaluate the MAX3681's basic functionality.
____________________________Features
o Single +3.3V Supply o Inputs and Outputs Terminated for Interfacing with 3.3V PECL and LVDS Logic o Fully Assembled and Tested
Evaluates: MAX3681
_______________Detailed Description
T h e MAX3681 EV kit simplifies evaluation of the MAX3681. The EV kit operates from a single +3.3V supply and includes all the external components necessary to interface with 3.3V PECL and LVDS logic. Each PECL input (SCLK+, SCLK-, SD+, SD-) is terminated on the EV board with the Thevenin equivalent of 50 to (VCC - 2V). These inputs can be driven directly b y the output of any 3.3V PECL device, such as a clock-and-data-recovery circuit (e.g., the MAX3675). All LVDS outputs (PCLK+, PCLK-, PD_+, PD_-) are differentially terminated with 100 resistors between complementary outputs. Each output can directly drive an LVDS input or a high-impedance input oscilloscope ( s e e the section Connecting LVDS Outputs to 50 Input Oscilloscopes). When driving an LVDS input that already includes 100 differential termination, remove the termination resistor corresponding to the appropriate LVDS output. The synchronization inputs (SYNC+, SYNC-) are intern a l l y terminated LVDS inputs with 100 d i f f e r e n t i a l i n p u t resistance. Ensure that LVDS devices driving these inputs are not redundantly terminated. All signal inputs and outputs use coupled 50 transmission lines. All input signal lines are of equal length to minimize propagation-delay skew. Likewise, all output signal lines are of equal length.
______________Ordering Information
PART MAX3681EVKIT-SO TEMP. RANGE -40°C to +85°C BOARD TYPE Surface Mount
____________________Component List
DESIGNATION QTY C1C4, C7 C5 C6 C8C11 J1J16 L1 R1, R3, R5, R7 R2, R4, R6, R8 R9R13 U1 +3.3V, GND None 5 1 1 4 16 1 4 4 5 1 2 1 DESCRIPTION 0.1µF ceramic capacitors 33µF, 6.3V tantalum capacitor Sprague 293D336X06R3C2 2.2µF ceramic capacitor 100pF ceramic capacitors SMA connectors (PC edge mount) 56nH inductor Coilcraft 0805CS-560 130, 5% resistors 82, 5% resistors 100, 5% resistors MAX3681EAG 2-pin headers MAX3681 data sheet
__________Applications Information
Connecting LVDS Outputs to 50 Input Oscilloscopes
To monitor an LVDS signal on a 50 input oscilloscope, remove the differential load resistor between the complementary outputs and AC couple each output to an oscilloscope input. For example, to observe the PD0 signal on a 50 input instrument, remove resistor R12 from the EV board and place a capacitor or DC block in series with each output (PD0+ or PD0-) and the instrument input. Do not connect MAX3681 outputs directly to 50 inputs or terminations to ground. Choose a coupling capacitor large enough in value to prevent pattern-dependent distortion of the output signal.
1
______________Component Suppliers
SUPPLIER Coilcraft Sprague PHONE (847) 639-6400 (603) 224-1961 FAX (847) 639-1469 (603) 224-1430
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Evaluates: MAX3681
J7 1 R9 00 J8 SMA PD3J9 SMA PD2+ J10 SMA PD20 C1 .1µF VCC J1 VCC 0 C2 .1µF VCC J2 0 C3 .1µF VCC J3 0 C4 .1µF VCC J4 J6 SMA SYNC+ 5 L1 6nH VCC 2 C6 .2µF 0 C7 .1µF 1 C8 00pF 1 C10 00pF 1 C9 00pF 1 C11 00pF 1 R13 00 1 R7 30 8R8 2 SMA SYNC1 R12 00 J5 J13 SMA PD0+ J14 SMA PD0J15 SMA PCLK+ J16 SMA PCLK1 R5 30 8R6 2 SYNC+ SYNCVCC GND PCLK+ PCLKGND PD1PD0+ PD01 R3 30 8R4 2 PD3+ PD3GND PD2+ PD2PD1+ 1 R1 30 8R2 2 1 R10 00 SMA PD3+
MAX3681 Evaluation Kit
Figure 1. MAX3681 EV Kit Schematic
VCC MAX3681 VCC SD+ SDVCC SCLK+ SCLKVCC J11 SMA PD1+ 1 R11 00 J12 SMA PD11 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 3 C5 63µF .3V THIS SYMBOL REPRESENTS A TRANSMISSION LINE OF CHARACTERISTIC IMPEDANCE Z0 = 50
2
SMA
SD+
SMA
SD-
SMA
SCLK+
SMA
SCLK-
+3.3V
_______________________________________________________________________________________
GND
MAX3681 Evaluation Kit Evaluates: MAX3681
Figure 2. MAX3681 EV Kit Component Placement Guide--Component Side
_______________________________________________________________________________________
3
Others parts begin by ma
|
|
|
