AD8326 datasheet(14/24 Pages) AD

14 / 24 page

REV. 0

AD8326

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Running AD8326 Software

To load the control software, go to START, PROGRAMS,

CABDRIVE_26, or select the AD8326.exe from the installed

directory. Once loaded, select the proper parallel port to com-

municate with the AD8326 (Figure 9).

Figure 9. Parallel Port Selection

Controlling Gain/Attenuation of the AD8326

The slide bar controls the gain/attenuation of the AD8326,

which is displayed in dB and in V/V. The gain scales 0.75 dB

per LSB with valid codes from 0 to 71. The gain code from the

position of the slide bar is displayed in decimal, binary, and

hexadecimal (Figure 10).

Transmit Enable and Sleep Mode

The Transmit Enable and Transmit Disable buttons select the

mode of operation of the AD8326 by asserting logic levels on

the asynchronous TXEN pin. The Transmit Disable button

applies Logic 0 to the TXEN pin, disabling forward transmis-

sion while maintaining a 75

Ω back termination. The Transmit

Enable button applies Logic 1 to the TXEN pin, enabling the

AD8326 for forward transmission. Checking the “Enable SLEEP

Mode” checkbox applies logic “0” to the asynchronous

SLEEP

pin, setting the AD8326 for SLEEP mode.

Memory Functions

The MEMORY section of the software provides a way to alter-

nate between two gain settings. The “X->M1” button stores

the current value of the gain slide bar into memory while the

“RM1” button recalls the stored value, returning the gain slide

bar to the stored level. The same applies to the “X->M2” and

“RM2” buttons.

Figure 10. Control Software Interface

AD8326 Datasheet(PDF) 14 Page - Analog Devices