AD6655 datasheet(63/84 Pages) AD

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AD6655

Rev. 0 | Page 63 of 84

ALTERNATIVE ANALOG INPUT DRIVE

CONFIGURATION

This section provides a brief description of the alternative

analog input drive configuration using the AD8352. When

using this particular drive option, some additional components

need to be populated. For more details on the AD8352 differential

driver, including how it works and its optional pin settings,

consult the AD8352 data sheet.

To configure the analog input to drive the AD8352 instead of

the default transformer option, the following components need

to be added, removed, and/or changed for Channel A. For

Channel B, the corresponding components should be changed.

Remove C1, C17, C18, and C117 in the default analog

input path.

Populate C8 and C9 with 0.1 μF capacitors in the analog

input path. To drive the AD8352 in the differential input

mode, populate the T10 transformer; the R1, R37, R39,

R126, and R127 resistors; and the C10, C11, and C125

capacitors.

Populate the optional amplifier output path with the

desired components including an optional low-pass filter.

Install 0 Ω resistors, R44 and R48. R43 and R47 should be

increased (typically to 100 Ω) to increase to 200 Ω the

output impedance seen by the AD8352.

AD6655 Scheda tecnica(PDF) 63 Page - Analog Devices