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19-1523; Rev 0; 11/99
MAX3264/MAX3265 Evaluation Kits
General Description
The MAX3264 evaluation kit (EV kit) (data rate up to 1.25Gbps) evaluates the MAX3264/MAX3268 limiting amplifiers. The MAX3265 EV kit (data rate up to 2.5Gbps) evaluates the MAX3265/MAX3269 limiting amplifiers. These EV kits allow easy programming of the loss-ofsignal (LOS) threshold and provide layout options for alternate termination configurations. The circuit includes space for a user-supplied preamplifier and photodiode pair mounted in a TO-46 can. Both EV kits have evaluation sites for a 16-pin TSSOP with electrical input, a 10-pin MAX with electrical input, and a 10-pin MAX with optical input (not installed). See Figure 1 for an overview of possible configurations. o Easy LOS Threshold Programming o Allow Alternate Output Terminations o Circuit Includes Space for TO-46 PIN-TIA Optical Input o 1.25Gbps Data Rate (MAX3264EVKIT) 2.5Gbps Data Rate (MAX3265EVKIT)
Features
Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Ordering Information
PART TEMP. RANGE IC PACKAGE 0C to +70C 0C to +70C 16 TSSOP* (MAX3264), 10 MAX* (MAX3268) 16 TSSOP* (MAX3265), 10 MAX* (MAX3269)
Component Suppliers
MAX3264EVKIT-SO SUPPLIER AVX Murata Sprague Zetex USA PHONE 803-649-0690 814-237-1431 516-435-1110 516-543-7100 FAX 803-626-3123 814-238-0490 516-435-1824 516-864-7630 *Exposed pad packages MAX3265EVKIT-SO
Note: Please indicate that you are using the MAX3264 or MAX3265 EV kit when contacting these component suppliers.
MAX3264EV U1 1 2 3 4 5 6 7 8 U2 MAX INPUT 1 2 3 4 5 16 TSSOP 16 15 14 13 TSSOP OUTPUT 12 11 10 9 10 MAX 10 9 MAX OUTPUT 8 7 6
MAX3265EV U1 1 2 3 4 5 6 7 8 U2 10-PIN MAX PACKAGE WITH ELECTRICAL INPUT (Preassembled) MAX INPUT 1 2 3 4 5 16 TSSOP 16 15 14 13 TSSOP OUTPUT 12 11 10 9 10 MAX 10 9 MAX OUTPUT 8 7 6
MAX3264
TSSOP INPUT
16-PIN TSSOP PACKAGE (Preassembled)
TSSOP INPUT
MAX3268
MAX3264/65/68/69 EVALUATION BOARD
U3 1 2 3 4 5 10 MAX 10 9 OPTO OUTPUT 8 7 6 10-PIN MAX PACKAGE WITH OPTICAL INPUT (Not Assembled)
MAX3264/65/68/69 EVALUATION BOARD
U3 1 2 3 4 5 10 MAX 10 9 OPTO OUTPUT 8 7 6
Figure 1. Overview of Layout Topographies ________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
MAX3269
MAX3265
MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Component List
DESIGNATION C1, C4, C6, C9-C11, C14-C17,C19, C30-C32 C2, C3, C7, C8, C12, C13 C5, C26, C27 C18, C20, C21, C28, C29, C33, C34 C22, C23 C24, C25 R1, R2 R3, R12 R4, R13 R5, R8, R9, R15, R16, R17 R7, R14 R10, R11 QTY DESCRIPTION 1000pF 10%, 10V ceramic capacitors (0603) 0.01F 10%, 10V ceramic capacitors (0603) 0.1F 10%, 10V ceramic capacitors Not installed 33F 10%, 16V tantalum caps AVX TAJC336K016 2.2F 10%, 10V ceramic capacitors (1206) 100 1% resistors (0603) 50k variable resistors 5k variable resistors Not installed None 2 2 330 5% resistors (0603) 0 resistors (0603) None 1 1 U3 None 3 DESIGNATION L1, L2 L3 J2-J5, J7, J8, J10, J11 J6, J18-J20 J13, J14 J22 D1, D2 D3 U1 U2 2 2 2 2 2 6 1 2 1 1 1 QTY 2 1 8 4 DESCRIPTION Ferrite beads Murata BLM21A102S (0603) Not installed SMA connectors (edge mount) 2-pin headers (0.1in centers) Not placed 3-pin header (0.1in centers) Red LEDs Not installed MAX3264CUE (MAX3264EVKIT) MAX3265CUE (MAX3265EVKIT) MAX3268CUB (MAX3264EVKIT) MAX3269CUB (MAX3265EVKIT) Not installed Shunts for J6, J22, and J18 or J19 or J20 MAX3264 or MAX3265 EV kit circuit board, Rev. B MAX3264/MAX3265/MAX3268/ MAX3269 data sheet
14
6 3 7
Quick Start
MAX3264/MAX3265 TSSOP Package
1) Install a shunt on J18 to apply power (J19, J20 open). 2) Install a shunt on terminals 1 and 2 of J22 to disable squelch. 3) Connect OUT+ and OUT- to a 50 terminated oscilloscope. 4) Apply an input (10mVp-p to 1.2Vp-p) to J4 and J5. 5) Connect a +3.0V to +5.5V power supply to the VCC pad, then connect the power-supply ground to the GND pad. 6) Adjust the LOS threshold with R3 and R4.
3) Connect OUT+ and OUT- to a 50 terminated oscilloscope. 4) Apply 2V to VCC, ground to GND, and a -1.0V to -3.5V power supply to VEE. 5) Adjust the LOS threshold with R12 and R13.
Detailed Description
LOS Voltage Threshold Adjustment
Potentiometers R3, R4, R12, and R13 adjust the VTH voltage, which programs the LOS threshold. Refer to the MAX3264/MAX3265/MAX3268/MAX3269 data sheet for details.
CML Output Buffer
The MAX3264/MAX3265 CML output circuits provide high tolerance to impedance mismatches and inductive connectors. The output current can be set for either of two levels. When the LEVEL pin is left unconnected (J6 open), the output current is approximately 16mA. Connecting the LEVEL pin to ground (J6 closed) sets the output current to approximately 20mA.
MAX3268/MAX3269 MAX Package with Electrical Input
1) Install a shunt on J19 to apply power (J18, J20 open). 2) Apply an input (10mVp-p to 1.2Vp-p) to J7 and J8.
2
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MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
VCC1 C2 0.01F 1 C5 0.1F J4 J5 C8 0.01F J6 R4 5k R3 50k C7 0.01F 2 3 4 5 6 7 8 1 2 3 CW 1 2 3 CW CAZ1 CAZ2 VEE IN+ INGND LEVEL TH TP5 N.C. 16 15 14 13 12 VCC1 10 9 TP2 LOSD1 NOT INSTALLED R7 330 C4 1000pF TP1 LOS+ D3 VCC1 C10 1000pF C1 1000pF R2 100 C3 0.01F J3 J22 1 VCC1 R1 100 VCC1
J2
U1 MAX3264 MAX3265
SQUELCH VCC OUT+ OUTVCC LOS+ LOS-
R5 330
Figure 2. MAX3264/MAX3265 EV Kits Schematic (TSSOP Package)
R10 0 VEE1 C11 1000pF VCC2 C14 1000pF R8 NOT INSTALLED VEE1 R9 NOT INSTALLED R11 0 J11 D2 R14 330 C17 1000pF SP3 SP4 SEE TABLE 2 FOR ALTERNATE OUTPUT TERMINATIONS. SP7 SHORT J10 VCC2
J7 J8
C12 0.01F
1 2 3
VEE IN+ INGND TH
U2 MAX3268 MAX3269
VCC OUT+ OUTVCC LOS-
10 9 8
OPEN OPEN
C13 0.01F VEE1 1 2
VEE1
VCC2 7 6 C16 1000pF
4 5
R13 5k 3
C15 1000pF
R12 1 50k 2
3 CW TP6 TP3
CW
Figure 3. MAX3264/MAX3265 EV Kits Schematic (MAX Package with Electrical Input)
L2 PC BOARD POWER DISTRIBUTION J15 VCC C22 33F C24 2.2F C27 0.1F J18 C19 1000pF J19 C9 1000pF C6 1000pF VCC2 C31 1000pF L1 J17 VEE VCC3 VCC3 1 2 3 C29 1000pF C28 0.1F C34 0.01F R17 100 4 5 10 9 8 7 6 TP4 VCC3 C21 0.01F J14 C18 1000pF C32 1000pF R15 100 SP1 SP2 R16 100 OPEN OPEN SEE TABLE 3 FOR ALTERNATE OUTPUT TERMINATIONS. C30 1000pF C20 0.01F C23 33F C25 2.2F C26 0.1F J20 VCC1
J16 GND
VCC3 VEE1
J13
COMPONENTS NOT INSTALLED FOR OPTICAL CONFIGURATION
L3
J21
C33 0.01F
VEE IN+ INGND TH
U3 MAX3268 MAX3269
VCC OUT+ OUTVCC LOS-
VCC3
Figure 4. MAX3264/MAX3265 EV Kits Schematic (MAX Package with Optical Input) _______________________________________________________________________________________ 3
MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Table 1. Jumpers and Potentiometers
NAME J18 J19 J20 J22 (Pins 1-2) J22 (Pins 2-3) R3, R4 R12, R13 FUNCTION Applies power to U1 Applies power to U2 Applies power to U3 Disables squelch Enables squelch Adjusts LOS threshold of U1 (0 is clockwise) Adjusts LOS threshold of U2 (0 is clockwise) SP3 SP4 SP7 NAME SP1 SP2 FUNCTION Solder jumper for alternate terminations (Table 3) Solder jumper for alternate terminations (Table 3) Solder jumper for alternate terminations (Table 2) Solder jumper for alternate terminations (Table 2) Normally shorted
Table 2. Output Terminations for Electrical Input (U2)
OUTPUT LOGIC OUTPUT TERMINATIONS CONFIGURATION 1 (Default)
VCC = 2V U2
MAX3268 MAX3269
CONDITIONS
OUT+
R10 0 ZO = 50 ZO = 50 R11 0
OSCILLOSCOPE
OUTVEE = -1.0V TO -3.5V
50
50
SP3 open, SP4 open, R8 = R9 = do not install, R10 = R11 = 0, VCC = 2V, VEE = -1.0V to -3.5V, GND = 0V, oscilloscope is referenced to ground
0V
CONFIGURATION 2
VCC = 3V TO 5.5V
PECL MAX3268CUB/ MAX3269CUB
U2
MAX3268 MAX3269
OUT+
R8 330
R10 0.1F ZO = 50 ZO = 50
OSCILLOSCOPE
OUTVEE = 0V R9 330
R11 0.1F
50
50
SP3 closed, SP4 open, R8 = R9 = 330, R10 = R11 = 0.1F, VCC = 3V to 5.5V, VEE = GND = 0V
VEE = 0V
0V
CONFIGURATION 3
VCC = 3V TO 5.5V U2
MAX3268 MAX3269
OUT+
R10 0 ZO = 50 ZO = 50 R11 0
OSCILLOSCOPE
OUTVEE = 0V
50
50
SP3 open, SP4 open, R8 = R9 = do not install, R10 = R11 = 0, VCC = 3V to 5.5V, VEE = GND = 0V, oscilloscope must be referenced to VCC - 2V
VCC - 2V
4
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MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Table 2. Output Terminations for Electrical Input (U2) (continued)
OUTPUT LOGIC CONFIGURATION 4
VCC = 3V TO 5.5V VCC = 3V TO 5.5V R8 100 R10 0.1F ZO = 50 ZO = 50 R9 100 R11 0.1F 50 50 OSCILLOSCOPE
OUTPUT TERMINATIONS
CONDITIONS
CML MAX3265CUB
U2
MAX3265
OUT+
OUTVEE = 0V
SP3 open, SP4 closed, R8 = R9 = 100, R10 = R11 = 0.1F, VCC = 3V to 5.5V, VEE = GND = 0V
0V
Table 3. Output Terminations for Optical Input (U3)
OUTPUT LOGIC CONFIGURATION 1
VCC = 3V TO 5.5V U3
MAX3268 MAX3269
OUTPUT TERMINATIONS
CONDITIONS
OUT+
R15 330
C20 0.1F ZO = 50 ZO = 50
OSCILLOSCOPE
OUTR16 330 VEE = 0V
VEE = 0V
C21 0.1F
50
50
SP1 closed, SP2 open, R15 = R16 = 330, C20 = C21 = 0.1F, VCC = 3V to 5.5V, VEE = GND = 0V
0V
PECL MAX3268CUB/ MAX3269CUB
CONFIGURATION 2
VCC = 3V TO 5.5V U3
MAX3268 MAX3269
OUT+
C20 0 ZO = 50 ZO = 50 C21 0
OSCILLOSCOPE
OUTVEE = 0V
50
50
SP1 open, SP2 open, R15 = R16 = do not install, C20 = C21 = 0, VCC = 3V to 5.5V, VEE = GND = 0V, oscilloscope must be referenced to VCC - 2V
VCC - 2V
CONFIGURATION 3
VCC = 3V TO 5.5V VCC = 3V TO 5.5V OUT+ R15 100 C20 0.1F ZO = 50 ZO = 50 R16 100 C21 0.1F 50 50 OSCILLOSCOPE
CML MAX3265CUB
U3
MAX3265
OUTVEE = 0V
SP1 open, SP2 closed, R15 = R16 = 100, C20 = C21 = 0.1F, VCC = 3V to 5.5V, VEE = GND = 0V
0V
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MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
1.0"
Figure 5. MAX3264/MAX3265 EV Kits Component Placement Guide
1.0"
Figure 6. MAX3264/MAX3265 EV Kits PC Board Layout-- Component Side
6
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MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
1.0"
Figure 7. MAX3264/MAX3265 EV Kits PC Board Layout-- Solder Side
1.0"
Figure 8. MAX3264/MAX3265 EV Kits PC Board Layout-- Power Plane
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MAX3264/MAX3265 Evaluation Kits Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
1.0"
Figure 9. MAX3264/MAX3265 EV Kits PC Board Layout--GND 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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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