AD9261 datasheet(25/29 Pages) AD

Part #	AD9261

Description	16-Bit, 10 MHz Bandwidth, 30 MSPS to 160 MSPS Continuous Time Sigma-Delta ADC

PDF	29 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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25 / 29 page

AD9261

Rev. 0 | Page 24 of 28

HARDWARE INTERFACE

The pins described in Table 21 comprise the physical interface

between the programming device of the user and the serial port

of the AD9261. The SCLK and CSB pins function as inputs

when using the SPI interface. The SDIO pin is bidirectional,

functioning as an input during write phases and as an output

during readback.

The SPI interface is flexible enough to be controlled by either

PROM or PIC microcontrollers. This provides the user with the

ability to use an alternate method to program the ADC. One

such method is described in detail in the AN-812 Application

Note, MicroController-Based Serial Port Interface (SPI) Boot

Circuit.

When the SPI interface is not used, some pins serve a dual

function. When strapped to AVDD or ground during device

power-on, the pins are associated with a specific function.

AD9261 Datasheet(PDF) 25 Page - Analog Devices