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Evaluates: MAX14986

MAX14986 Evaluation Kit

General Description

The MAX14986 evaluation kit (EV kit) provides a proven

design to evaluate the MAX14986 dual-channel buffer.

The EV kit contains four sections: an application circuit,

characterization circuit, and two calibration traces.

The application circuit (Figure 1a) is designed to dem-

onstrate the IC’s use in redriving Serial-Attached SCSI

(SAS) and Serial ATA (SATA) signals. This section of

the EV kit operates from an external +5V supply that is

regulated by an on-board LDO to +3.3V, which powers

the MAX14986 (U1) device. All traces in the application

circuit are 100Ω differential controlled-impedance traces.

The characterization circuit (Figure 1b) is provided for

eye diagram evaluation using SMA connectors and 50Ω

single-ended controlled-impedance traces. This section is

Features

● Application Circuit with SAS and SATA Input/Output

● Eye Diagram Test Circuit with SMA Inputs/Outputs

● Calibration Traces (50Ω Single-Ended Load Trace

and 50Ω Single-Ended Through Trace)

● Lead(Pb)-Free and RoHS Compliant

● Proven PCB Layout

● Fully Assembled and Tested

Quick Start (Application Circuit)

Recommended Equipment

● MAX14986 EV kit

● +5V power supply

● Two SAS/SATA cables

● SAS/SATA device (e.g., a hard drive)

● SAS/SATA host (e.g., a PC)

Procedure

The EV kit is fully assembled and tested. Follow the steps

below to verify board operation:

1) Verify that all jumpers are in their default position, as

shown in Table 1.

2) If testing in a SATA environment, change the shunt on

jumper JU6 to the 1-2 position.

3) Connect the first SAS/SATA cable from the PC to the

host connector (J1) on the EV kit.

4) Connect the second SAS/SATA cable from the device

connector (J2) to the SAS/SATA device.

5) Verify communication between the host PC and SAS/

SATA device.

19-6854; Rev 0; 11/13

Ordering Information appears at end of data sheet.

Summary of content (13 pages)

PAGE 1
Evaluates: MAX14986 MAX14986 Evaluation Kit General Description The MAX14986 evaluation kit (EV kit) provides a proven design to evaluate the MAX14986 dual-channel buffer. The EV kit contains four sections: an application circuit, characterization circuit, and two calibration traces.
PAGE 2
Evaluates: MAX14986 MAX14986 Evaluation Kit Detailed Description of Hardware Application Circuit (U1) The MAX14986 evaluation kit (EV kit) evaluates the MAX14986 dual-channel buffer. The device is designed to redrive Serial-Attached SCSI (SAS) or Serial ATA (SATA) signals. The EV kit is divided into four sections: application circuit, characterization circuit, and two calibration traces. The application circuit provides the means for evaluating the device in a SAS/SATA application.
PAGE 3
Evaluates: MAX14986 MAX14986 Evaluation Kit Device Enable (JU5) The U1 device is enabled/disabled by configuring jumper JU5 (see Table 4). When disabled, the device buffers are disabled and the part is placed in a low-power standby mode. Input Equalization (JU1, JU3) The IC host and device can be evaluated with or without input equalization. Configure JU1 to enable/disable the host input (IN0P, IN0M) equalization and JU3 to enable/ disable the device input (IN1P, IN1M) equalization (see Tables 5 and 6).
PAGE 4
Evaluates: MAX14986 MAX14986 Evaluation Kit Characterization Circuit (U2) The characterization circuit is provided as a separate test circuit for eye diagram evaluation of the IC. This circuit provides differential SMA inputs and outputs with 50Ω single-ended, controlled-impedance traces. Channel 1 is not utilized in this section of the EV kit, but provides the same performance as Channel 0. disabled and the part is placed in a low-power standby mode.
PAGE 5
Evaluates: MAX14986 MAX14986 Evaluation Kit Component List DESIGNATION C1–C12, C19–C26, C32–C35 C13–C16, C27–C30 C17, C31 C18 QTY DESCRIPTION DESIGNATION 24 0.01µF ±10%, 25V X7R ceramic capacitors (0402) Murata GRM155R71E103KA TDK C1005X7R1E103K 8 2.2µF ±10%, 10V X7R ceramic capacitors (0603) Murata GRM188R71A225K 2 1µF ±10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C105K TDK C1608X7R1C105K 1 0.
PAGE 6
MAX14986 Evaluation Kit Evaluates: MAX14986 Figure 1a. MAX14986 EV Kit Schematic—Application Circuit (Sheet 1 of 3) www.maximintegrated.
PAGE 7
MAX14986 Evaluation Kit Evaluates: MAX14986 Figure 1b. MAX14986 EV Kit Schematic—Characterization Circuit (Sheet 2 of 3) www.maximintegrated.
PAGE 8
MAX14986 Evaluation Kit Evaluates: MAX14986 Figure 1c. MAX14986 EV Kit Schematic—Calibration Traces (Sheet 3 of 3) www.maximintegrated.
PAGE 9
Evaluates: MAX14986 MAX14986 Evaluation Kit 1.0” Figure 2. MAX14986 EV Kit Component Placement Guide— Component Side www.maximintegrated.com 1.0” Figure 3.
PAGE 10
Evaluates: MAX14986 MAX14986 Evaluation Kit 1.0” Figure 4. MAX14986 EV Kit PCB Layout—Inner Layer 2 www.maximintegrated.com 1.0” Figure 5.
PAGE 11
Evaluates: MAX14986 MAX14986 Evaluation Kit 1.0” Figure 6. MAX14986 EV Kit PCB Layout—Solder Side www.maximintegrated.
PAGE 12
Evaluates: MAX14986 MAX14986 Evaluation Kit Ordering Information PART TYPE MAX14986EVKIT# EV Kit #Denotes RoHS compliant. www.maximintegrated.
PAGE 13
Evaluates: MAX14986 MAX14986 Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 11/13 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied.