2003 Jan 27

20

Philips Semiconductors

Product specification

8-bit A/D and D/A converter

PCF8591

15 APPLICATION INFORMATION

In order to prevent excessive ground and supply noise and to minimize cross-talk of the digital to analog signal paths the

user has to design the printed-circuit board layout very carefully. Supply lines common to a PCF8591 device and noisy

digital circuits and ground loops should be avoided. Decoupling capacitors (>10

µF) are recommended for power supply

and reference voltage inputs.

handbook, full pagewidth

MBL839

AIN0

AIN1

AIN2

AIN3

A0

A1

A2

AOUT

VDD

VSS

VREF

AGND

EXT

OSC

SCL

SDA

VDD

VDD

VDD

VDD

VOUT

+θ

+θ

V0

AIN0

AIN1

AIN2

AIN3

A0

A1

A2

AOUT

VDD

VSS

VREF

AGND

EXT

OSC

SCL

SDA

VDD

VDD

VOUT

V1

V2

V0

VDD

PCF8591

PCF8591

MASTER

TRANSMITTER

ANALOGUE GROUND

DIGITAL GROUND

Fig.21 Application diagram.