Tables Tab (Figure 4)

There are four look-up tables (LUTs) that can be loaded:

TLUT1 and TLUT2 for temperature compensation, and

ALUT1 and ALUT2 for optional additional compensation.

The EV kit software includes an MS-Excel spreadsheet

file MAX11008_LUT_Example.xls, which models how

physical temperature and voltage parameters can be

mapped into the MAX11008’s EEPROM memory. Refer

to the

Temperature/APC Configuration Registers section

in the MAX11008 IC data sheet for detailed operation of

the look-up tables.

A set of radio buttons selects one of the four LUT con-

figuration registers. After clicking the appropriate radio

button for TLUT1, ALUT1, TLUT2, or ALUT2, the soft-

ware displays configuration values (pointer offset, linear

interpolation, pointer size, table size, and start of table).

After modifying any of these configuration values, click

the Apply Changes button to write the new configura-

tion value for the selected table.

To initialize a table, click the radio button selecting the

desired table. Enter the value 0 into the edit field next to

the Fill with constant button, then click to fill the table

with zeros. Enter the known correction values into the

table from the EEPROM tab, or click Load from file to

load the table points from a text file. Finally, click

Interpolate entries that contain zero to perform linear

interpolation on all zero value table entries. (This opera-

tion is not the same as the MAX11008’s linear interpola-

tion

between table entries. The GUI software interpola-

tion fills in

missing table entries.)

The memory map display shows which address range

is assigned to each enabled look-up table. Two or more

look-up tables may be assigned to the same address

range; however, they will contain identical data.

Overlapping table ranges are not recommended.

Alarms Tab (Figure 5)

The Alarms tab configures the ALARM output pin, tem-

perature and current alarm limits, hysteresis, and alarm

behavior.

ADC / Control Tab (Figure 6)

The ADC / Control tab configures the system parameters,

reads ADC data, and controls the gate-driver outputs.

Keyboard Navigation

When you type on the keyboard, the system must know

which control should receive the keys. Press the Tab

key to move the keyboard’s focus from one control to

the next. The focused control is indicated by a dotted

outline. Shift+Tab moves the focus to the previously

focused control. Buttons respond to the keyboard’s

SPACE bar. Some controls respond to the keyboard’s

UP and DOWN arrow keys. Activate the program’s

menu bar by pressing the F10 key, then press the letter

of the menu item you want. Most menu items have one

letter underlined, indicating their shortcut key.

Detailed Description of Hardware

For the purpose of “table-top” demonstration, two MOSFETS

(M1 and M2) are provided on-board, taking the place of

the LDMOS FETs that would be used in a real application.

Diode-connected BJT transistors D1 and D2 sense the

temperature of each FET while remaining electrically iso-

lated by different PCB copper layers. Capacitors C20 and

C21 filter the external temperature measurements. Gate

drive is lowpass filtered by R14/C28 and R15/C29. Drain

current is measured by Kelvin-connected precision resis-

tors R7 and R8, filtered by R5/C22 and R6/C23. Drain volt-

age is sensed by 6:1 resistor-dividers R9/R1 and R3/R3.

Power is provided from the HSI2CMOD board connect-

ed to J1. The digital supply connects directly to 5V

through jumper JU8. On-board MAX1615 regulator U3

provides the 5V analog supply through jumper JU12.

On-board MAX6126 voltage reference U2 drives both

REFADC and REFDAC through jumpers JU5 and JU6.

The MAX11008 power is bypassed by C4, C5, and

C24–C27.

The complete evaluation system is a three-board set,

with the 68HC16 microcontroller driving the HSI2CMOD

HSI2CMOD online documentation for details.

MAX11008 Evaluation Kit/

Evaluation System

4

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