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19-2065; Rev 0; 6/01
MAX3877/MAX3878 Evaluation Kits
General Description
The MAX3877/MAX3878 evaluation kits (EV kits) simplify evaluation of the MAX3877/MAX3878 2.5Gbps clock-recovery and data-retiming ICs. These EV kits enable testing of all MAX3877 and MAX3878 functions. SMA connectors are provided for the differential inputs and outputs. The MAX3877 has CML outputs and the MAX3878 has PECL outputs. Both the MAX3877 and MAX3878 EV kits come complete with on-board output structures to allow direct connection to 50 oscilloscopes and test equipment.
PART MAX3877EVKIT MAX3878EVKIT
Features
o SMA Connections for All High-Speed I/Os o Test Points for Monitoring LOL and LOS o Single +3.3V Power-Supply Operation o Fully Assembled and Tested
Evaluate: MAX3877/MAX3878
Ordering Information
TEMP. RANGE -40C to +85C -40C to +85C IC PACKAGE 32 TQFP-EP* 32 TQFP-EP*
* Exposed pad
Component List
DESIGNATION C1-C10, C12-C16, C21-C26, C29, C30 C11 C17, C18, C27, C28 C19 C20 R1, R2 R3, R5 R4, R6 R7, R11, R15, R19 R8, R12, R16, R20 R9, R13, R17, R21 R10, R14, R18, R22 L1, L2, L3, L4 QTY DESCRIPTION 0.1F 10% ceramic capacitors (0603) 1F 10% ceramic capacitor (1206) 0.1F capacitors (0603) (MAX3877EVKIT) 0 resistors (0603) (MAX3878EVKIT) 33F 20%, 10V min tantalum capacitor 2.2F 10% ceramic capacitor (1206) 392 1% resistors (0603) 10k variable resistors Digi-Key 3296W-103-ND 3.6k 5% resistors (0603) 0 resistors (0402) (MAX3877EVKIT) 24 resistors (0402) (MAX3878EVKIT) 0 resistors (0402) (MAX3877EVKIT) 27 resistors (0402) (MAX3878EVKIT) Open (MAX3877EVKIT) 130 resistors (0402) (MAX3878EVKIT) Open (MAX3877EVKIT) 220 resistors (0402) (MAX3878EVKIT) 56nH inductors Coilcraft 0805HS-560TKBC
DESIGNATION
QTY
DESCRIPTION MAX3877EHJ (5mm 32-pin TQFP-EP) (MAX3878EVKIT)
23
U1
1 MAX3878EHJ (5mm 32-pin TQFP-EP) (MAX3878EVKIT)
1 4 1 1 2 2 2 4 4 4 4 4
D1 D2 TP1, TP2 JP1, JP4 JP2, JP5, JP6, JP10 JP2, JP5, JP6, JP10 JP7 J1-J8 J9, J10 None None None
1 1 2 2 4 4 1 8 2 1 1 1
Red LED Green LED Test points 2-pin headers (0.1in centers) 3-pin headers (0.1in centers) Shunts Not installed SMA connectors (edge-mount) Johnson 142-0701-801 or Digi-Key J502-ND VCC, GND MAX3877/MAX3878 EV kit circuit board, Rev C MAX3877/MAX3878 data sheet MAX3877/MAX3878 EV kit data sheet
________________________________________________________________ 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.
MAX3877/MAX3878 Evaluation Kits Evaluate: MAX3877/MAX3878
Detailed Description
These EV kits are fully assembled and factory tested. They enable testing of all chip functions. Jitter analysis and product performance can also be observed by appropriately interfacing the EV kit with a bit-error-rate tester (BERT) and a jitter analyzer.
Test Equipment Required
* * * * +3.3V power supply with 300mA current capability Signal source, 2.5Gbps minimum capability Jitter analyzer capable of 2.5Gbps performance Oscilloscope with at least 3GHz performance
MAX3877 EV Kit Output Terminations
The MAX3877 EV kit has on-board AC-coupling capacitors to allow direct connection of the EV kit outputs to 50 equipment.
MAX3878 EV Kit Output Terminations
The MAX3878 EV kit has on-board termination networks on all high-speed outputs (SDO, SCLKO) to interface PECL outputs directly to 50 oscilloscopes or test equipment. The on-board interfaces perform the level shifting and attenuation required to interface PECL outputs to 50 loads. The attenuation from the network is about 6dB, or half of the voltage swing.
Connections
The serial data inputs (SDI, SLBI) have on-board AC-coupling capacitors. All of the outputs (SDO, SCLKO) are terminated to allow direct connection to 50 oscilloscopes or test equipment.
Quick Start
1) Verify that there is a shunt across the SDI ENABLE side of jumper JP10. 2) Verify that there is a shunt across the REF DISABLE side of jumper JP6. 3) Verify that there is a shunt across the PHADJ DISABLE side of jumper JP2. 4) Verify that there is a shunt across the THADJ DISABLE side of jumper JP5. 5) Connect +3.3V and ground to the appropriate terminals of the EV kit. 6) Connect a 2.5Gbps PRBS NRZ signal to the SDI inputs with 50 cables. 7) Connect the outputs to a 50 high-speed oscilloscope.
Table 1. Jumpers, Controls and Test Points
NAME JP1 JP2 JP4 JP5 JP6 JP10 TP1 TP2 R3 R5 TYPE 2-Pin Header 3-Pin Header 2-Pin Header 3-Pin Header 3-Pin Header 3-Pin Header Test Point Test Point Potentiometer Potentiometer DESCRIPTION Short to disable DC-offset/pulse-width distortion cancellation Disable/Enable phase adjust function Short to disable PLL filter Disable/Enable threshold adjust function Select between SDI and SLBI. Refer to data sheet. Select between SDI and SLBI. Refer to data sheet. LOL test point LOS test point Used to adjust PHADJ control voltage Used to adjust THADJ control voltage NORMAL POSITION Open (Enabled) PHADJ DISABLE Open (Enabled) VTH DISABLE REF DISABLE SDI ENABLE
2
_______________________________________________________________________________________
MAX3877/MAX3878 Evaluation Kits Evaluate: MAX3877/MAX3878
+3.3V C19 33F 10V GND C20 2.2F
L1 56nH
VCCPLL C21 0.1F C22 0.1F C29 0.1F C30 0.1F C15 0.1F VCCVCO C23 0.1F C24 0.1F VCCOUT C25 0.1F C26 0.1F C3 0.1F C14 0.1F VCC JP2 C16 0.1F D2 C4 0.1F R2 392 TP2 LOS D1 R1 392 TP1 VCC R4 3.6k R3 10k +3.3V
L2 56nH
L3 56nH
L4 56nH +3.3V
VCC R6 3.6k R5 10k
VCC
PWD FILTER DISABLE JP1 C12 0.1F
PLL LOOP FILTER DISABLE JP4 C11 1F
JP5
R7 0 32 31 30 29 28 27 26 25
R8 0
C17 0.1F
J5 SMA
CPWD-
CPWD+
FIL+
PHADJ
GND
C13 0.1F
FIL-
LOS
LOL
1 2 C1 VCCPLL 0.1F 3 4 5 C2 VCCPLL 0.1F SLB1 EN 6 7 8
GND
VCC SDO+ SDO-
24 23 22 21 20 19 18 17
VCCOUT
R9 OPEN VCC
C7 0.1F
R10 OPEN
THADJ VCC SDISDI+ VCC SIS LREF SLBIGND GND VCC
R11 0 VCCOUT VCCOUT R13 OPEN VCC C8 0.1F
R12 0
C18 0.1F
J6 SMA
J1 SMA
U1 MAX3877
VCC VCC SCLKO+ SCLKOVCC GND VCC VCC
R14 OPEN R16 0 C27 0.1F
J2 SMA VCC
J7 SMA
JP10 SDI EN
VCCOUT
R17 OPEN
R15 0 C9 0.1F
R18 OPEN
SLBI+
VCC R19 0 R20 0 C28 0.1F J8 SMA R21 OPEN VCC C10 0.1F R22 OPEN
10
11
12
13
14
15 VCCVCO C6 0.1F
REF CLK ENABLE REF CLK DISABLE JP6 VCCPLL VCCPLL J3 SMA C5 0.1F J4 SMA GND
Figure 1. MAX3877 EV Kit Schematic _______________________________________________________________________________________ 3
16
9
VCC
MAX3877/MAX3878 Evaluation Kits Evaluate: MAX3877/MAX3878
+3.3V C19 33F 10V GND C20 2.2F
L1 56nH
VCCPLL C21 0.1F C22 0.1F C29 0.1F C30 0.1F C15 0.1F VCCVCO C23 0.1F C24 0.1F VCCOUT C25 0.1F C26 0.1F C3 0.1F C14 0.1F VCC JP2 C16 0.1F D2 C4 0.1F R2 392 TP2 LOS D1 R1 392 TP1 +3.3V VCC R4 3.6k R3 10k
L2 56nH
L3 56nH
L4 56nH +3.3V
VCC R6 3.6k R5 10k
VCC
PWD FILTER DISABLE JP1 C12 0.1F
PLL LOOP FILTER DISABLE JP4 C11 1F
JP5
R7 24 32 31 30 29 28 27 26 25
R8 27
C17 0
J5 SMA
CPWD-
FIL+
CPWD+
PHADJ
GND
C13 0.1F
FIL-
LOS
LOL
1 2
GND
VCC SDO+ SDO-
24 23 22 21 20 19 18 17
VCCOUT
R9 130 VCC
C7 0.1F
R10 220
THADJ VCC SDISDI+ VCC SIS LREF SLBIGND GND VCC
C1 VCCPLL 0.1F J1 SMA
3 4 5
R11 24 VCCOUT VCCOUT R13 130 VCC C8 0.1F
R12 27
C18 0
J6 SMA
U1 MAX3878
VCC VCC SCLKO+ SCLKOVCC GND VCC VCC
R14 220 R16 27 C27 0
J2 SMA VCC C2 VCCPLL 0.1F SLB1 EN JP10 SDI EN
6 7 8
J7 SMA
VCCOUT
R17 130
R15 24 C9 0.1F
R18 220
SLBI+
VCC R19 24 R20 27 C28 0 J8 SMA R21 130 VCC C10 0.1F R22 220
10
11
12
13
14
15 VCCVCO C6 0.1F
REF CLK ENABLE REF CLK DISABLE JP6 VCCPLL VCCPLL J3 SMA C5 0.1F J4 SMA GND
Figure 2. MAX3878 EV Kit Schematic 4 _______________________________________________________________________________________
16
9
VCC
MAX3877/MAX3878 Evaluation Kits Evaluate: MAX3877/MAX3878
Figure 3. MAX3877/MAX3878 EV Kit Component Placement Guide--Component Side _______________________________________________________________________________________ 5
1.0"
MAX3877/MAX3878 Evaluation Kits Evaluate: MAX3877/MAX3878
1.0"
Figure 4. MAX3877/MAX3878 EV Kit PC Board Layout-- Component Side
1.0"
Figure 5. MAX3877/MAX3878 EV Kit PC Board Layout-- Solder Side
1.0"
Figure 6. MAX3877/MAX3878 EV Kit PC Board Layout-- Power Plane
1.0"
Figure 7. MAX3877/MAX3878 EV Kit PC Board Layout-- Ground Plane
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.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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