AD5593R datasheet(32/34 Pages) AD

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Data Sheet

AD5593R

Rev. B | Page 31 of 33

APPLICATIONS INFORMATION

MICROPROCESSOR INTERFACING

Microprocessor interfacing to the AD5593R is via a serial bus using

a standard I2C protocol. The communications channel requires a

2-wire interface consisting of a clock signal and a data signal.

AD5593R TO ADSP-BF537 INTERFACE

The I2C interface of the AD5593R is designed to be easily

connected to industry-standard DSPs and microcontrollers.

Figure 41 shows the AD5593R connected to the Analog Devices

Blackfin® DSP. The Blackfin has an integrated I2C port that can

be connected directly to the I2C pins of the AD5593R.

ADSP-BF537

SCL

SDA

RESET

PF8

AD5593R

Figure 41. ADSP-BF537 Interface

LAYOUT GUIDELINES

In any circuit where accuracy is important, careful consideration

of the power supply and ground return layout helps to ensure

the rated performance. The printed circuit board (PCB) on

which the AD5593R is mounted must be designed so that the

AD5593R lies on the analog plane.

The AD5593R must have ample supply bypassing of 10 μF in

parallel with 0.1 μF on each supply, located as close to the package

as possible, ideally right up against the device. The 10 μF capacitors

are the tantalum bead type. The 0.1 μF capacitor must have low

effective series resistance (ESR) and low effective series inductance

(ESI) such as the common ceramic types, which provide a low

impedance path to ground at high frequencies to handle transient

currents due to internal logic switching.

AD5593R Datasheet(PDF) 32 Page - Analog Devices