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19-3340; Rev 0, 7/04
MAX3983 SMA Connector Evaluation Kit
_______________ General Description
The MAX3983 SMA Connector evaluation kit (EV Kit) is an assembled demonstration board that provides electrical evaluation of the MAX3983 Quad Copper Cable Signal Conditioner. All data inputs and outputs are accessible through SMA connectors. The EV Kit also includes a calibration strip for accurate measurements.
_________________________Features
Evaluates: MAX3983

Fully Assembled and Tested Easy Selection of Operating Modes Equipped with SMA Connectors on all Data Inputs and Outputs
____________________ Component List
DESIGNATION QTY C1-C32, C35C44 C33 C34, C45, C46, C49 C47, C48, C50, C51 J1-J34 JP1, JP2, JP8 - JP10 JP12 JP3 JP5 JP11 L1 R1-R8 R10 - R18 TP1-TP11 U1 U2 None None 42 1 4 4 34 6 1 1 1 1 8 9 11 1 1 DESCRIPTION 0.01F 5% ceramic capacitors (0402) 33F tantalum capacitor 0.1F 5% ceramic capacitors (0402) Not Installed SMA connectors, edge mount 2-pin headers, 0.1in centers 3-pin header, 0.1in centers 3-pin + 1-pin header, 0.1in centers Not Installed 4.7H Inductor Coilcraft DS1608C-472 4.7k 5% resistors (0402) Not Installed Test points Digi-Key 5000K-ND MAX3983UGK 68-QFN* OR Gate Fairchild NC7S32P5X SC70 MAX3983 SMA connector evaluation circuit board, rev B MAX3983 data sheet
______________ Ordering Information
PART TEMP. RANGE MAX3983SMAEVKIT 0C to +85C IC PACKAGE 68 QFN
______________Component Suppliers
SUPPLIER AVX Coilcraft Digi-Key Murata PHONE 843-448-9411 847-639-6400 218-681-6674 770-436-1300 FAX 843-448-1943 847-639-1469 218-681-3380 770-436-3030
Note: Please indicate that you are using the MAX3983 when ordering from these suppliers.
________________________ Quick Start
1) 2) 3) 4) 5) 6) 7) 8) Connect a +3.3V supply to the 3.3V terminal and ground to the GND terminal. Install shunt at jumper JP10. Disable system loopback by LOOPBACK shunt at jumper JP9. installing the
Remove shunts at jumpers JP3 and JP5 to enable TX and RX. Install shunt at jumper JP2 to VCC to provide +3.3V to the SD pullup resistors. Apply 2.5Gbps to 3.2Gbps data to TX_IN[1:4] (J9 - J16). Apply 2.5Gbps to 3.2Gbps data to RX_IN[1:4] (J19 - J26). Connect data outputs RX_OUT[1:4] (J1 - J8) to a 50 ohm-terminated oscilloscope to monitor RX_IN[1:4] data, and/or connect TX_OUT[1:4] (J27 - J34) to a 50 ohm-terminated oscilloscope to monitor TX_IN[1:4] data. Adjust TX pre-emphasis with jumpers JP1 and JP12, and adjust RX pre-emphasis with JP8 (see Jumper Descriptions).
*Note: U1 has an exposed pad which requires it to be solder attached to the circuit board to ensure proper functionality of the part.
9)
_________________________________________________________________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.
MAX3983 SMA Connector Evaluation Kit
__________________________________________________________________ _Jumper NAME TYPE 2-pin header 2-pin header 2-pin header 2-pin header 2-pin header 2-pin header SHUNT POSITION OPEN SHUNT (GND) OPEN SHUNT (GND) OPEN SHUNT (GND) OPEN SHUNT (GND) SHUNT OPEN SHUNT (VCC) OPEN TX_ENABLE (JP3) 3-pin header TX_AUTO_EN TX_DISABLE OPEN RX_AUTO_EN RX_ENABLE (JP5) 3-pin + 1-pin header RX_DISABLE DESCRIPTION Enables most-significant bit of TX pre-emphasis control Disables most-significant bit of TX pre-emphasis control Enables least-significant bit of TX pre-emphasis control Disables least-significant bit of TX pre-emphasis control Sets RX pre-emphasis to 6dB Sets RX pre-emphasis to 3dB Enables loopback from TX_IN[1:4] to RX_OUT[1:4] Disables loopback Jumper JP10 must be shunted for proper operation of the MAX3983 Allows external voltage (3.0V to 5.5V) applied at VPULLUP pin as SD resistor pullup voltage Sets Vcc as the SD resistor pullup voltage Enables the TX section of the MAX3983 Enables auto-detection in the TX section, when EV board is set up in the Auto-Detect configuration. See Auto-Detect Configuration in Detailed Description. Disables the TX section of the MAX3983 Enables the RX section of the MAX3983 Enables auto-detection in the RX section when EV board is set up in the Auto-Detect configuration. See Auto-Detect Configuration in Detailed Description. Disables the RX section of the MAX3983 Sets RX_ENABLE high whenever LOOPBACK or all of RX_SD[1:4] are high when EV board is set up in the Auto-Detect configuration. See Auto-Detect Configuration in Detailed Description.
Descriptions
Evaluates: MAX3983
TX_PE1 (JP1) TX_PE0 (JP12) RX_PE (JP8) LOOPBACK (JP9) VCCTX (JP10) PULLUP (JP2)
_______________Detailed
Description
To configure the board for auto-detection on the TX side, solder four 0 0402 resistors in R10 - R13 and remove R2, R3, and R4. Jumper JP3 then enables TX auto-detect (see Jumper Descriptions).
The MAX3983 SMA Connector Evaluation Kit is shipped with each signal detect (SD) separated. In order for the MAX3983 to automatically detect an incoming signal and enable the corresponding output, these SD outputs need to be connected together.
Auto-Detect Configuration
To configure the board for auto-detection on the RX side, solder four 0 0402 resistors in R14 - R17 and remove R6, R7, and R8. Jumper JP5 then enables RX auto-detect (see Jumper Descriptions).
Output Transition Times
If slower transition times are desired, the MAX3983 SMA Connector Evaluation Kit provides a connection for 0402 capacitors across the TX outputs. To achieve about 100ps (20%-80%) edges, solder 1.5pF capacitors for C47, C48, C50, and C51.
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RX_OUT1RX _OUT2RX_OUT3RX_OUT4-
RX_OUT1+
RX_OUT2+
RX_OUT3+
RX_OUT4+
J1
J2
J3
J4
J5
J6
J7
J8
C17 C18 V PULLUP JP2 R8 4.7k C46 0.1F TP5 RX_SD1 TP6 RX_SD2 TP7 RX_SD3 TP8 RX_SD4 TP1 TX_SD1 TP2 TX_SD2 TP3 TX_SD3 TP4 TX_SD4 R7 4.7k R6 4.7k R5 4.7k R4 4.7k R3 4.7k R2 4.7k R1 4.7k 0.01F 0.01F 0.01F 0.01F 0.01F 0.01F 0.01F VCC C19 C20 C21 C22 C23 C24 0.01F
RX _E NABLE
R17 OPE N
R16 OPE N
R15 OP EN
R14 OPE N
R13 OPEN
R12 OP EN
R11 OPEN
R10 OPEN
RX_PE
JP8 V CCRX VCCRX VCCRX V CCRX VCCRX
TX_AUTO_EN CPOR
52
TX_DISABLE
JP3
LOOPBACK
68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53
LOOP BACK
JP9
POR VCC4 VCC4 VCC4 VCC4 RX_PE VCC4
E P*
LOOPBACK
C34 0.1F 1 RX_SD1 RX_SD2 VCC3 49 48 47 46 45 44 43 42 41 40 39 38 37 VCC3 RX_SD3 36 VCCRX C1 0.01F C2 0.01F VCCRX 50 51 LOOPB ACK 2
U2 NC7S32P5X
4
TX _E NABLE
RX_OUT1-
RX_OUT2-
RX_OUT3-
RX_OUT1+
RX_OUT2+
RX_OUT3+
RX_OUT4RX_OUT4+
TX_IN1VCCTX 3 V CC1 TX_IN1RX_IN1+ RX_IN1GND RX_IN2+ RX_IN2GND RX_IN3+ RX_IN3GND RX_IN4+ RX_IN4TX_IN1+ GND TX_IN2TX_IN2+ GND 4 5 6 7 8 9 10 TX_IN3TX_SD2
J9 2
C37
0.01F
RX_ENABLE
1 TX_SD1
RX_AUTO_EN
JP5
RX_DISABLE
TX_IN1+
J10
C38
0.01F
RX _E NABLE J19 RX_IN1+ J20
TX_ENABLE
N.C.
VCC2
TX_OUT1+
TX_OUT1-
VCC2
TX_OUT2+
TX_OUT2-
VCC2
TX_OUT3+
TX_OUT3-
VCC2
TX_OUT4+
TX_OUT4-
VCC2
TX_PE0
TX_PE1
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Figure 1. MAX3983 SMA Connector EV Kit Schematic
RX_IN1J21 C3 0.01F C4 0.01F RX_IN2+ J22 C5 0.01F C6 0.01F
TX_IN2-
J11
C39 0.01F
TX_IN2+
J12
C40
0.01F
TX_IN3-
J13
MAX3983
U1
C41 0.01F 11 TX_IN3+ GND TX_IN4TX_IN4+ V CC1 TX_SD3 TX_SD4 12 13 14 VCCTX 15 16 17
RX_IN2J23
TX_IN3+
J14
C42
RX_IN3+ J24
0.01F
TX_IN4-
J15
C43
RX_IN3J25
0.01F
C7 0.01F C8 0.01F
RX_IN4+ J26 RX_SD4 35
TX_IN4+
J16
C44
0.01F
RX_IN4-
J27
J17 TX_ENAB LE VCCTX VCCTX V CCTX
TX_PE1
VCCTX VCCTX
JP1
TX_OUT4J28
C35
0.01F C47 NOT INSTA LLED
TX_PE0
JP12
TX_OUT4+ J29
J18 R18 OPE N VCCTX TP10 VCCTX
C36
C9 0.01F C10 0.01F
TX_OUT3J30
0.01F
TX_OUT3+ C48 NOT INSTA LLED J31
VCC
JP10
C11 0.01F C12 0.01F
TX_OUT2J32
C25 0.01F C32 0.01F V CCRX TP9 VCCRX
C26 0.01F
C28 0.01F
TX_OUT2+ C50 NOT INSTA LLED J33
L1
3.3V C29 0.01F TP11 GND C30 0.01F C31 0.01F
JP11
C13 0.01F C14 0.01F
TX_OUT1J34 C51 NOT INSTA LLED C15 0.01F C16 0.01F
4.7H
GND
C49 0.1F
C33 33F
C45 0.1F
C27 0.01F
TX_OUT1+
Evaluates: MAX3983
_________________________________________________________________________________________
*EP = EXPOSED PAD, SOLDERED TO GROUND
MAX3983 SMA Connector Evaluation Kit
3
MAX3983 SMA Connector Evaluation Kit
Evaluates: MAX3983
Figure 2. MAX3983 SMA Connector EV Kit Component Placement Guide - Component Side 4 _________________________________________________________________________________________
MAX3983 SMA Connector Evaluation Kit Evaluates: MAX3983
Figure 3. MAX3983 SMA Connector EV Kit PC Board Layout - Component Side
_________________________________________________________________________________________
5
MAX3983 SMA Connector Evaluation Kit
Evaluates: MAX3983
Figure 4. MAX3983 SMA Connector EV Kit PC Board Layout - Ground Plane 6 _________________________________________________________________________________________
MAX3983 SMA Connector Evaluation Kit Evaluates: MAX3983
Figure 5. MAX3983 SMA Connector EV Kit PC Board Layout - Power Plane
_________________________________________________________________________________________
7
MAX3983 SMA Connector Evaluation Kit
Evaluates: MAX3983
Figure 6. MAX3983 SMA Connector EV Kit PC Board Layout - Solder (Bottom) 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.
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