MAX15501 datasheet(4/15 Pages) MAXIM

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Maxim Integrated

Evaluates: MAX15500/MAX15501

MAX15501 Evaluation Kit

SPI is a trademark of Motorola, Inc.

12) Turn on the power supply.

13) Start the MAX15501 EV kit software by opening its

icon in the Start | Programs menu. The EV kit soft-

ware main window appears, as shown in Figure 1.

14) Wait approximately 5s for the program to automati-

cally detect the EV kit.

15) Press the Set button in the DAC group box to set the

DAC output to 0V.

16) Uncheck the Disable Analog Output (OUTDIS)

checkbox to enable the MAX15501.

17) Select 101: Bipolar Voltage: Q10V in the Mode

drop-down list.

18) Use the voltmeter to verify that the output voltage on

pin 1 of J3 is approximately -12V.

19) Move the scrollbar in the DAC group box all the way

to the right and press the Set button (DAC full scale

output = +2.5V).

20) Use the voltmeter to verify that the output voltage on

pin 1 of J3 is approximately +12V.

Detailed Description of Software

The main window of the evaluation software is shown in

Figure 1. The software can be used to control both the

on-board 16-bit DAC and the MAX15501.

DAC

In the DAC group box, use the scrollbar to set the 16-bit

DAC data. The adjacent edit box at the left of the scroll-

bar displays the equivalent expected output-voltage

values of the on-board DAC. The user can also set the

output-voltage values of the DAC by typing the desired

voltage value in the edit box and pressing the Enter key.

Press the Set button to update the DAC output.

Configuration

The Configuration group box has all the controls for the

MAX15501.

To set the operating mode of the MAX15501, select the

appropriate mode in the Mode drop-down list.

The Brown out Threshold drop-down list sets the

brownout threshold for error reporting.

When evaluating the MAX15501 on the MAX15501 EV kit,

select the 2.5V option from the FS Select drop-down list.

Select the 4.096V option in the FS Select drop-down list

when evaluating the MAX15500 on the MAX15501 EV kit.

When the 20% above FS option is selected in the

FS Mode drop-down list, the FSMODE pin of the

MAX15501 is set to logic-low, which sets the output volt-

age to120%FS when the input voltage is equal to the full-

scale value. When the 5% above FS option is selected

in the FS Mode drop-down list, the FSMODE pin of the

MAX15501 is set to logic-high, which sets the output

voltage to 105%FS when the input voltage is equal to the

full-scale value.

Check the Thermal Self Protect checkbox to turn on the

thermal protection of the MAX15501.

Uncheck the Disable Analog Output (OUTDIS) check-

box to set the OUTDIS pin to logic-high and enable

the output of the MAX15501. To disable the output of

the MAX15501, check the Disable Analog Output

(OUTDIS) checkbox.

Press the Read button in the Configuration group box

to read the settings.

Status

In the Status group box, the Read Back Error group

box displays the fault conditions from the readback error

the status of the ERROR and the READY pins. Press the

Read button to update the Status group box. Check the

Automatic Read checkbox to automatically update the

Status group box every second.

During power-up, ERROR can go low and the brownout

twice to clear all the error register bits and reset ERROR

to high.

Read/Write Command

The Read/Write Command group box displays the last

command and data sent or received from the MAX15501

or the on-board DAC.

To send an SPIK command to the MAX15501 or the on-

board DAC, click on the appropriate radio button, enter

the SPI command (hex value) in the MOSI Data edit box,

and press the Send Command button.

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