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19-3396; Rev 0; 8/04
MAX9486 Evaluation Kit
General Description
The MAX9486 EV kit evaluates the MAX9486, a highperformance clock synthesizer with an 8kHz input reference clock. The EV kit provides six buffered 35.328MHz outputs, CLK1-CLK6, and a jitter-suppressed 8kHz output REO. The EV kit operates from a single 3.3V power supply. Single 3.3V Supply Controlled 50 Microstrip Traces On-Board Adjustable Charge Pump Current Fully Assembled and Tested
Features
Evaluates: MAX9486
Ordering Information
PART MAX9486EVKIT TEMP RANGE 0C to +70C IC PACKAGE 24 TSSOP
Component List
DESIGNATION QTY DESCRIPTION 10F 20%, 6.3V X5R ceramic capacitors (0805) Taiyo Yuden JMK212BJ106M TDK C2012X5R0J106M 0.01F 10%, 16V X7R ceramic capacitors (0402) Taiyo Yuden EMK105BJ103K Murata GRM36X7R103K016K 0.001F 10%, 50V X7R ceramic capacitors (0402) TDK C1005X7R1H102K Not installed, ceramic capacitors (0603) 4.7pF 0.1pF, 50V C0G ceramic capacitors (0603) TDK C1608COG1H4R7B 560pF 5%, 50V COG ceramic capacitor (0603) TDK C1608COG1H561J DESIGNATION C20 R1 R2 R3 R4 R5-R11 REIN, SMA1-SMA7 Y1 JU1 JU2-JU9 None None U1 QTY 1 1 1 1 1 7 8 1 1 8 1 1 1 DESCRIPTION 0.022uF10%, 50V X7R ceramic capacitor (0603) TDK C1608X7R1H223K 49.9 1% resistor (0603) 13k 1% resistor (0603) 1M 5% resistor (0603) 200k 12-turn potentiometer 464 1% resistors (0603) SMA edge-mount connectors Johnson Components 142-0701-801 17.664MHz through-hole crystal resonator (with 14pF load cap) Ecliptek ECX-5866-17.664M 3-pin header 2-pin headers Shunt MAX9486 PC board MAX9486EUG (24-pin TSSOP)
C1, C2, C3
3
C4, C5, C6
3
C7, C8, C9 C10, C13-C18 C11, C12
3 0 2
C19
1
________________________________________________________________ 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.
MAX9486 Evaluation Kit Evaluates: MAX9486
Quick Start
The MAX9486 EV kit is fully assembled and tested. Do not turn on the power supplies until all connections are completed.
Detailed Description
The MAX9486 EV kit is a fully assembled and tested PC board. The EV kit evaluates the MAX9486, a high-performance clock synthesizer with an 8kHz input reference clock. The MAX9486 EV kit operates with a single 3.3V power supply, and provides six 35.328MHz outputs (CLK1-CLK6) and a jitter-suppressed 8kHz output REO. The output signals SMA1-SMA7 from the EV kit are scaled down by approximately 10 times to accommodate low 50 impedance of equipment.
Recommended Equipment
* 3.3V, 500mA power supply * 8.000kHz 200ppm frequency source (or function generator) * Frequency counter(s)/500MHz oscilloscope
Procedure
1) Verify that a shunt is across JU1 (pins 1 and 2) (SHDN = DVDD). 2) Verify that there is no shunt across JU2-JU9. 3) Connect frequency counter(s) to the SMA connector(s) SMA1/2/3/4/5/6. 4) Connect the 8.000kHz frequency source to the REIN SMA connector. 5) Connect the positive of the power supply to the VDD, VDDP, and DVDD pads. 6) Connect the power ground to the GND pads. 7) Turn on the power supply, and enable the frequency source (or function generator). 8) Verify output frequencies SMA1/2/3/4/5/6 are at 35.328MHz 200ppm. 9) Vary the 8.000kHz input by 200ppm, then verify the output SMA1/2/3/4/5/6 tracks with the input and is at 35.328MHz 200ppm.
Adjustable Charge Pump Current
The MAX9486 EV kit provides on-board adjustable charge-pump current options. To set the desired charge-pump current in A, adjust the 200k potentiometer R4 (k) so: ICharge_Pump_Current = 2400 / [(R4+13) +1] where R4 is set to 0 at default.
Jumper Selection
Jumper JU1 is incorporated to control the SHDN pin of the MAX9486 device. See Table 1 for the JU1 function.
Table 1. JU1 Function
SHUNT LOCATION Pins 1 and 2 Pins 2 and 3 SHDN PIN Connected to DVDD Connected to GND EV KIT FUNCTION Enabled Disabled
Component Suppliers
SUPPLIER Ecliptek Murata Taiyo Yuden TDK PHONE 800-433-1280 770-436-1300 800-348-2496 847-803-6100 FAX 714-433-1234 770-436-3030 847-925-0899 847-390-4405 WEBSITE www.ecliptek.com www.murata.com www.t-yuden.com www.component.tdk.com
Note: Indicate that you are using the MAX9486 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX9486 Evaluation Kit Evaluates: MAX9486
VDDP GND VDD
GND
C1 10F
C2 10F
C4 0.01F
C5 0.01F
C7 0.001F 4 DVDD DVDD C3 10F C6 0.01F C9 0.001F 9 DVDD U1 1 JU1 R11 464 1% JU2 REO 3 2 C10 OPEN REO 2 1 SHDN GND 7 VDD VDDP 5 23
C8 0.001F 18 14 16 21 19 24 C13 OPEN JU3 CLK1 R5 464 1% 1 C14 OPEN JU4 CLK2 R6 464 1% 1 SMA1 2
GNDP GND GND GND
VDD VDD VDD CLK1
GND
CLK2
22
SMA2 2
MAX9486
SMA7 2
1
CLK3
20 C15 OPEN JU5 CLK3 R7 464 1%
1
SMA3 2
REIN SMA 2
1 R1 49.9 1%
3
REIN
CLK4
17 C16 OPEN JU6 CLK4 R8 464 1%
1
SMA4 2
6
X1 CLK5
15 C17 OPEN JU7 CLK5 R9 464 1%
1
SMA5 2
Y1
C11 4.7pF 8 X2 13 12 R2 13k 1% CLK6 SETI LP1 11 R3 1M C19 560pF LP2 10 JU9
2 3 R4 200k 1
C12 4.7pF
1 C18 OPEN JU8 CLK6 R10 464 1%
SMA6 2
C20 0.022F
Figure 1. MAX9486 EV Kit Schematic _______________________________________________________________________________________ 3
MAX9486 Evaluation Kit Evaluates: MAX9486
Figure 2. MAX9486 EV Kit Component Placement Guide-- Component Side
Figure 3. MAX9486 EV Kit PC Board Layout--Component Side
Figure 4. MAX9486 EV Kit PC Board Layout--Inner Layer 2 (GND Layer) 4
Figure 5. MAX9486 EV Kit PC Board Layout--Inner Layer 3 (DVDD Layer)
_______________________________________________________________________________________
MAX9486 Evaluation Kit Evaluates: MAX9486
Figure 6. MAX9486 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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