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19-2313; Rev 0; 1/02
MAX9400 Evaluation Kit
General Description
The MAX9400 evaluation kit (EV kit) contains the MAX9400 low-skew quad buffer. The MAX9400 EV kit runs at PECL/ECL and LVPECL/LVECL supplies at clock rates up to 3.0GHz. The EV kit can be operated synchronously with an external clock or asynchronously. The EV kit is designed with 50 controlled-impedance traces in a four-layer PC board. It can also be used to evaluate the MAX9401-MAX9405. o Controlled 50 Coplanar Traces o Input Trace Lengths Matched to <2mils o Output Trace Lengths Matched to <1mil o Frequency Range Up to 3.0GHz (MAX9400/MAX9402/MAX9403/ MAX9405) Up to 2.0GHz (MAX9401/MAX9405) o PECL/ECL or LVPECL/LVECL Supply o 32-Pin TQFP Package o Fully Assembled and Tested
Features
Evaluates: MAX9400-MAX9405
Component List
DESIGNATION QTY DESCRIPTION 10F 10%, 10V tantalum capacitors (case B) AVX TAJB106K010R Kemet T494B106010AS 0.1F 10%, 16V X7R ceramic chip capacitors (0603) Murata GRM39X7R104K016A or Taiyo Yuden EMK107BJ104KA 0.01F 10%, 16V X7R ceramic capacitors (0402) Taiyo Yuden EMK105BJ103KW or Murata GRM36X7R103K016AD
C1, C2
2
Ordering Information
PART MAX9400EVKIT TEMP RANGE 0C to +70C IC PACKAGE 32 TQFP
C3-C11
9
Note: To evaluate the MAX9401-MAX9405, request a MAX9401EHJ/MAX9402EHJ/MAX9403EHJ/MAX9404EHJ/ MAX9405EHJ free sample with the MAX9400EVKIT.
C12-C20
9
Quick Start
The MAX9400 EV kit is fully assembled and tested. Do not turn on the power supplies until all connections are completed.
IN0-IN3, IN0-IN3, OUT0-OUT3, OUT0- OUT3, CLK, CLK JU1-JU4 R1, R2 R3-R8 R9-R36 U1 SEL, SEL , EN, EN None None None None
18
SMA edge-mount connectors Johnson Components 142-0701-801
Recommended Equipment
* * One 3GHz (min) differential signal generator (e.g., Agilent 8133A) One 12GHz (min) bandwidth oscilloscope with internal 50 input termination (e.g., Tektronix 11801C digital sampling oscilloscope with SD-24 sampling head) Two power supplies: a) One 2.0V with 500mA current capability b) One adjustable -3.5V to -0.375V with 500mA current capability * Matched male-SMA-to-male-SMA 50 coax cables: a) Matched SMA 50 coax cables for inputs IN1 and IN1 b) Matched SMA 50 coax cables for outputs OUT1 and OUT1
4 0 6 28 1 0 4 1 1 1
3-pin jumpers Not installed resistor (0402) 49.9 1% resistors (0402) 100 1%, 1/8W resistors (1206) MAX9400EHJ (32-pin 5mm x 5mm TQFP) Not installed, SMA edge-mount connectors Shunts MAX9400 PC board MAX9400 EV kit data sheet MAX9400 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.
MAX9400 Evaluation Kit Evaluates: MAX9400-MAX9405
Component Suppliers
SUPPLIER AVX Kemet Murata Taiyo Yuden PHONE 843-946-0238 864-963-6300 770-436-1300 800-348-2496 FAX 843-626-3123 864-963-6322 770-436-3030 847-945-0899 WEBSITE www.avxcorp.com www.kemet.com www.murata.com www.t-yuden.com
Note: Please indicate that you are using the MAX9400-MAX9405 when contacting these component suppliers.
Asynchronous Operation
1) Verify that shunts are across pins 1 and 2 of jumpers JU1 (SEL) and JU3 (EN) and pins 2 and 3 of jumpers JU2 (SEL) and JU4 (EN). 2) Connect two matched coax cables to the oscilloscope. Then connect the other end of the cables to OUT1 and OUT1 on the MAX9400 EV kit board. 3) Connect the 2.0V power supply to the VCC pad. Set the supply to 2.00V. Connect the supply ground to the GND pad closest to VCC. 4) Connect the -0.375V to -3.5V power supply to the VEE pad. Set the supply to -1.3V. Connect the supply ground to the GND closest to VEE. 5) Connect two matched coax cables to the differential signal generator that provides differential square waves with the following setting: a) b) c) d) Frequency = 2GHz VIH = 1.5V VIL = 1.0V Duty cycle = 50%
Detailed Description
The MAX9400 EV kit contains an extremely fast, lowskew quad LVECL/LVPECL or ECL/PECL buffer. The EV kit demonstrates ultra-low propagation delay and channel-to-channel skew. The four channels can be operated synchronously with an external clock, or in asynchronous mode, depending on the state of the SEL input.
Power Supply
The MAX9400/MAX9402/MAX9403/MAX9405 are specified with outputs terminated with 50 to VCC - 2V. In order to terminate the outputs with 50 to VCC - 2V using the 50 oscilloscope input termination, VCC is set to 2.0V. The MAX9401/MAX9404 are specified with outputs terminated with 50 to VCC - 3.3V, and with double swing outputs. In order to terminate the outputs with 50 to VCC - 3.3V, VCC is set to 3.3V. Table 1 lists the supply ranges for VCC and VEE. In an actual application, VCC and VEE can have different supplies (refer to the MAX9400/MAX9402/MAX9403/MAX9405 data sheet or the MAX9401/MAX9404 data sheet).
6) Connect the other end of the cables to IN1 and IN1. 7) Turn on the two power supplies, enable the function generator, and verify the differential output signal (VOUT1 - V OUT1) is greater than 500mV. To evaluate other channels, make sure the corresponding output termination resistors on the EV kit board are removed and the unused outputs are terminated. To eliminate signal distortion, use the matched samelength input cables, and use the matched same-length output cables.
Enable and Select
EN, EN, SEL, and SEL can be controlled by either jumpers or external signals. The MAX9400 EV kit can provide internal DC logic signals to EN, EN, SEL, and SEL by using jumpers JU1, JU2, JU3, and JU4. Table 2 lists jumper JU3 and jumper JU4 functions. Table 3 lists jumper JU1 and jumper JU2 functions. The EV kit can also be controlled by external signals using EN, EN, SEL, and SEL connectors. Before connecting external signals to the EN, EN, SEL, SEL connectors, verify there are no shunts across jumpers JU1-JU4.
2
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MAX9400 Evaluation Kit
Table 1. VCC and VEE Range
DEVICE MAX9400 MAX9401 MAX9402 MAX9403 MAX9404 MAX9405 VCC (V) 2.0 3.3 2.0 2.0 3.3 2.0 VEE RANGE (V) -3.5 to -0.375 -2.2 to +0.3 -3.5 to -0.375 -3.5 to -0.375 -2.2 to +0.3 -3.5 to -0.375
Evaluating the MAX9401-MAX9405
The MAX9400 EV kit is a four-layer PC board with 50 controlled-impedance input traces with 50 termination (two parallel 100 resistors). All output signal traces are also 50 controlled-impedance traces (with 49.9 termination resistors). The MAX9400 EV kit can be used to evaluate the MAX9401-MAX9405 after modification. Table 4 lists onchip input and output termination to the corresponding Maxim IC: * To evaluate the MAX9401, replace the MAX9400EHJ with a MAX9401EHJ. * To evaluate the MAX9402, replace the MAX9400EHJ with a MAX9402EHJ and remove output termination resistors R1 to R8. The output is half-amplitude compared to an open output because of the voltage-divider formed by the on-chip series 50 and the 50 oscilloscope input. To evaluate the MAX9403/MAX9404, replace the MAX9400EHJ with a MAX9403EHJ/MAX9404EHJ and remove input termination resistors R9 to R36. To evaluate the MAX9405, replace the MAX9400EHJ with a MAX9405EHJ and remove input and output termination resistors R1 to R36. The output is halfamplitude compared to an open output because of the voltage-divider formed by the on-chip series 50 and the 50 oscilloscope input.
Evaluates: MAX9400-MAX9405
Table 2. Jumper JU3 and JU4 Functions
JU3 LOCATION 1 and 2 EN PIN Connected to VCC Connected to GND JU4 LOCATION 2 and 3 EN PIN Connected to GND OUTPUT
Enabled
*
2 and 3
1 and 2
Connected to VCC
Disabled
*
All other combinations (not driven externally)
Undefined
Table 3. Jumpers JU1 and JU2 Functions
JU1 LOCATION 1 and 2 2 and 3 SEL PIN Connected to VCC Connected to GND JU2 LOCATION 2 and 3 1 and 2 SEL PIN OPERATING MODE
Table 4. On-Chip Input and Output Termination
NAME MAX9400 MAX9401 MAX9402 MAX9403 MAX9404 MAX9405 INPUT TERMINATION RESISTOR Open Open Open 100 100 100 OUTPUT TERMINATION RESISTOR Open Open 50 Open Open 50
Connected Asynchronous to GND mode Connected to VCC Synchronous mode Undefined
All other combinations (not driven externally)
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MAX9400 Evaluation Kit Evaluates: MAX9400-MAX9405
OUT0 SMA R7 49.9 1% VCC VEE R8 49.9 1%
OUT0 SMA
IN0 SMA R10 100 1% R11 100 1%
IN1 SMA R35 100 1% R36 100 1%
C10 0.1F
C11 0.1F
IN0 SMA
IN1 SMA
C19 0.01F R12 100 1% VCC R9 100 1% 1 32 1N0 31 1N0 30 VCC 29 OUT0 28 OUT0
C20 0.01F 27 VEE 26 IN1 25 IN1 R13 100 1% 24 C12 0.01F C3 0.1F R14 100 1%
VCC C1 10F 10V GND
VCC
VCC
VCC SEL SMA JU1 2 1 3 VCC SEL SMA JU2 2 1 3 CLK SMA R27 100 1% VCC EN SMA JU3 1 2 3 VCC EN SMA JU4 2 1 3 R33 100 1% R31 100 1% R25 100 1% R23 100 1%
C9 0.1F
C18 0.01F 2 OUT1 23
OUT1 SMA
SEL
R24 100 1%
3 SEL
U1
OUT1
22
R1 OPEN
OUT1 SMA
R26 100 1%
MAX9400
4 CLK VEE 21 R2 OPEN C13 0.01F 5 20 CLK VEE C4 0.1F VEE C2 10F 10V GND
CLK SMA
R28 100 1%
R29 100 1%
R30 100 1%
6
EN
OUT2
19 R3 49.9 1%
OUT2 SMA
R32 100 1%
7
EN
OUT2
18
OUT2 SMA
VCC
R34 100 1%
8
VCC
IN3
1N3
VCC
OUT3
OUT3
VEE
IN2
IN2
VCC
17
R4 49.9 1%
VCC
9
C8 0.1F IN3 SMA R21 100 1% R22 100 1% C17 0.01F
10
VCC
11
12
13
14
VEE
15
16
C14 0.01F C5 0.1F IN2
C16 0.01F
C15 0.01F R16 100 1% OUT3 SMA R18 100 1% R17 100 1% R15 100 1%
SMA
IN3 SMA
C7 0.1F OUT3 SMA
C6 0.1F
IN2 SMA
R19 100 1%
R20 100 1%
R6 49.9 1%
R5 49.9 1%
Figure 1. MAX9400 EV Kit Schematic
4
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MAX9400 Evaluation Kit Evaluates: MAX9400-MAX9405
1.0"
1.0"
Figure 2. MAX9400 EV Kit Component Placement Guide-- Component Side
Figure 3. MAX9400 EV Kit Component Place Guide--Solder Side
1.0"
1.0"
Figure 4. MAX9400 EV Kit PC Board Layout--Component Side
Figure 5. MAX9400 EV Kit PC Board Layout--Inner Layer 2 (GND Layer) 5
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MAX9400 Evaluation Kit Evaluates: MAX9400-MAX9405
1.0"
1.0"
Figure 6. MAX9400 EV Kit PC Board Layout--Inner Layer 3 (VCC Layer)
Figure 7. MAX9400 EV Kit 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.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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