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Evaluates: MAX6581

MAX6581 Evaluation Kit

19-5498; Rev 0; 9/10

General Description

The MAX6581 evaluation kit (EV kit) is an assembled

and tested PCB used to evaluate the MAX6581 8-chan-

nel temperature sensor. The device monitors its own

die temperature and the temperatures of up to seven

external diode-connected transistors. It converts the

temperature to 8-bit or 11-bit 2-wire serial data that can

be accessed over a 2-wire serial bus.

The EV kit also includes Windows

2000-, Windows

-, and Windows Vista

-compatible software, which

provides a simple user interface for exercising the fea-

tures of the device. The program is menu driven and

offers a graphical user interface (GUI) complete with

control buttons and status display.

Features

S Seven Remote Temperature Sensors

S Local Temperature Sensor

S Programmable Undertemperature and

Overtemperature Alerts

S Two Open-Drain Alarm Outputs (ALERT and

OVERT)

S On-Board Microcontroller to Generate

SMBus™/I²C Commands

S Easy-to-Use, Menu-Driven Software

S Fully Assembled and Tested

Component List

+Denotes lead(Pb)-free and RoHS compliant.

Windows, Windows XP, and Windows Vista are registered

trademarks of Microsoft Corp.

SMBus is a trademark of Intel Corp.

Ordering Information

PART TYPE

MAX6581EVKIT+ EV Kit

DESIGNATION QTY DESCRIPTION

C1, C4–C8,

C12, C17, C19

0.1FF Q10%, 16V X7R ceramic

capacitors (0603)

TDK C1608X7R1C104K

Murata GRM188R71C104K

C2, C13, C15 3

10FF Q20%, 16V X5R ceramic

capacitors (1206)

Murata GRM31CR61C106M or

TDK C3216X5R1C106M

C3 1

4.7FF Q10%, 6.3V X5R ceramic

capacitor (0603)

TDK C1608X5R0J475K

Murata GRM188R60J475K

C9 1

0.033FF Q10%, 16V X5R ceramic

capacitor (0603)

Murata GRM188R71E333K

TDK C1608X7R1E333K

C10, C11 2

22pF Q5%, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H220J

TDK C1608C0G1H220J

DESIGNATION QTY DESCRIPTION

C14 1

1FF Q10%, 16V X5R ceramic

capacitor (0603)

TDK C1608X5R1C105K

Murata GRM188R61C105K

C16, C18 2

10pF Q5%, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H100J

TDK C1608C0G1H100J

C20–C26 7

100pF Q5%, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C2A101J

TDK C1608C0G1H101J

D1, D2 2 Red LEDs (0805)

D3 1 Green LED (0805)

FB1 1

70I, 4A ferrite bead (0603)

TDK MMZ1608R301A

Murata BLM18SG700 TN1

H1 0

Not installed, 2 x 5-pin JTAG

header

JU1–JU8 8 2-pin headers

JU9 1 3-pin header

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

Summary of content (15 pages)

PAGE 1
MAX6581 Evaluation Kit Evaluates: MAX6581 General Description Features The MAX6581 evaluation kit (EV kit) is an assembled and tested PCB used to evaluate the MAX6581 8-channel temperature sensor. The device monitors its own die temperature and the temperatures of up to seven external diode-connected transistors. It converts the temperature to 8-bit or 11-bit 2-wire serial data that can be accessed over a 2-wire serial bus.
PAGE 2
MAX6581 Evaluation Kit Evaluates: MAX6581 Component List (continued) DESIGNATION P1 Q1–Q7 QTY DESCRIPTION 1 USB type-B right-angle PC-mount receptacle 7 2N3906-type pnp transistors (SOT23) Central Semi CMPT3906 Diodes Inc. MMBT3906 R1, R2 2 27I Q5% resistors (0603) R3, R17, R18 3 1.5kI Q5% resistors (0603) R4, R7, R19, R20 4 470I Q5% resistors (0603) R5 1 2.
PAGE 3
MAX6581 Evaluation Kit Evaluates: MAX6581 Quick Start Recommended Equipment • MAX6581 EV kit (USB cable included) • User-supplied Windows 2000, Windows XP, or Windows Vista PC with a spare USB port Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. Procedure The EV kit is fully assembled and tested.
PAGE 4
MAX6581 Evaluation Kit Evaluates: MAX6581 growth of the data-logging file. When the Auto Read checkbox is unchecked, the data is logged each time Read All is selected from the Options menu bar. To stop data logging, uncheck the Data Logging checkbox. Read a temperature by pressing the Read button. The temperature (in Celsius) reading is shown to the right of the GUI. Temperature All temperature channels have programmable alert (ALERT) and overtemperature (OVERT) thresholds.
PAGE 5
MAX6581 Evaluation Kit Evaluates: MAX6581 Configuration, ALERT Mask, and OVERT Mask Registers The configuration register controls the standby-mode bit, the power-on-reset bit, the SMBus timeout enable bit, and the extended-range enable bit. The ALERT mask register enables or disables the ALERT interrupt output. The OVERT mask register enables or disables the OVERT interrupt output. Figure 2 shows the checkboxes for the configuration register. Each checkbox corresponds to a bit in the register.
PAGE 6
MAX6581 Evaluation Kit Evaluates: MAX6581 Table 2. Configuration Register Checkboxes BIT 7 6 NAME STOP POR STATE Checked Unchecked* Checked Unchecked* Checked DESCRIPTION Places the device in software standby mode. Places the device in operational mode. Resets all registers to their default values, including the global configuration register. After selecting the POR checkbox, the checkbox returns to the unchecked state. Normal operation. Disables SMBus timeout. 5 TIMEOUT 4 RESERVED N/A Not used.
PAGE 7
MAX6581 Evaluation Kit Evaluates: MAX6581 Table 4. OVERT Mask Register Checkboxes BIT NAME 7 Mask OVERT 7 6 Mask Local OVERT 5 Mask OVERT 6 4 Mask OVERT 5 3 Mask OVERT 4 2 Mask OVERT 3 1 Mask OVERT 2 0 Mask OVERT 1 STATE DESCRIPTION Checked Disables the remote-diode 7 OVERT interrupt. Unchecked* Enables the remote-diode 7 OVERT interrupt. Checked Disables the local OVERT interrupt. Unchecked* Enables the local OVERT interrupt. Checked Disables the remote-diode 6 OVERT interrupt.
PAGE 8
MAX6581 Evaluation Kit Evaluates: MAX6581 Table 6. OVERT Status Register BIT NAME FUNCTION 7 Remote OVERT 7 6 Local OVERT 5 Remote OVERT 6 The channel 6 remote-diode temperature exceeds the temperature threshold limit in the remote 6 OVERT High Limit register. 4 Remote OVERT 5 The channel 5 remote-diode temperature exceeds the temperature threshold limit in the remote 5 OVERT High Limit register.
PAGE 9
MAX6581 Evaluation Kit Evaluates: MAX6581 Table 8. ALERT Low Status Register BIT NAME FUNCTION The channel 7 remote-diode temperature falls below the programmed temperature threshold limit in the remote 7 ALERT Low Limit register. 7 Remote ALERT 7 6 Local ALERT 5 Remote ALERT 6 The channel 6 remote-diode temperature falls below the programmed temperature threshold limit in the remote 6 ALERT Low Limit register.
PAGE 10
MAX6581 Evaluation Kit Evaluates: MAX6581 Advanced User Interface There are two methods for communicating with the device: through the normal user-interface main window or through the SMBus/I²C commands available by selecting Options | Interface (Advanced Users) from the menu bar. An Advanced User Interface window pops up with the 2-wire interface tab selected, which allows the SMBus/I2C-compatible protocols, such as read byte and write byte, to be executed.
PAGE 11
MAX6581 Evaluation Kit Evaluates: MAX6581 Replacing Diodes Jumpers JU1–JU7 connect the 2N3906 transistors as the external diodes. To use different diodes, remove Q1–Q7 and connect the diodes (through twisted-pair wire) across the DXP1–DXP7 and DXN1–DXN7 pads. Maxim Integrated User-Supplied Power Supply The EV kit is powered completely from the USB port by default. To power the EV kit externally, move the shunt on jumper JU9 to the 2-3 position and apply a user-supplied 3.
PAGE 12
MAX6581 Evaluation Kit Evaluates: MAX6581 Figure 4a.
PAGE 13
MAX6581 Evaluation Kit Evaluates: MAX6581 Figure 4b.
PAGE 14
MAX6581 Evaluation Kit Evaluates: MAX6581 1.0” Figure 5. MAX6581 EV Kit Component Placement Guide— Component Side 1.0” Figure 6. MAX6581 EV Kit PCB Layout—Component Side 1.0” Figure 7.
PAGE 15
MAX6581 Evaluation Kit Evaluates: MAX6581 Revision History REVISION NUMBER REVISION DATE 0 9/10 DESCRIPTION Initial release PAGES CHANGED — 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. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.