ADRF6518ACPZ-R7 datasheet(28/36 Pages) AD

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ADRF6518

Preliminary Technical Data

Rev. PrA | Page 28 of 36

EVALUATION BOARD

An evaluation board is available for testing the ADRF6518.

EVALUATION BOARD CONTROL SOFTWARE

The ADRF6518 evaluation board is controlled through the

parallel port on a PC. The parallel port is programmed via the

ADRF6518 evaluation software. This software enables/disables

the dc offset compensation loop and controls the filter corner

frequency, the high and low power modes, and the minimum

and maximum gains for each amplifier in the ADRF6518. For

information about the register map, see Table 5. For information

about SPI port timing and control, see Figure 2 and Figure 3.

After the software is downloaded and installed, start the basic

user interface to program the filter corner and gain values (see

Figure 73).

To program the filter corner, perform one of the following:

•

Click the arrow in the Frequency Corner MHz section of

the window, select the desired corner frequency from the

menu, and click Write Selected Cutoff Frequency to

Device.

•

Click Frequency +1 MHz or Frequency −1 MHz to

increment or decrement the frequency corner in 1 MHz

steps from the current frequency corner.

To program the filter mode, offset correction, and power mode,

move the respective slider switch in the upper right corner of

the window.

To program the maximum gains of VGA1, VGA2, VGA3, and

the postamplifier, click the VGA1 Gain dB, VGA2 Gain dB,

VGA3 Gain dB, and Post Amp Gain dB drop-down boxes and

select the desired gain.

•

The VGA1 maximum gain can be set to 9 dB, 12 dB, or

15 dB.

•

The VGA2 and VGA3 maximum gain can be set to 12 dB,

15 dB, 18 dB, or 21 dB.

•

The postamplifier maximum gain can be set to 3 dB or 9 dB.

When the user clicks the Write Selected Cutoff Frequency to

Device button, a write operation is executed, immediately

followed by a read operation. The updated information is

displayed in the VGA1 Gain dB, Filter Corner MHz, VGA2

Gain dB, VGA3 Gain dB, and Post Amp Gain dB fields.

Figure 73. Analog Devices ADRF6518 Evaluation Software

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