AD7877WACPZ-REEL7 Просмотр технического описания (PDF) - Analog Devices

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Компоненты Описание

производитель

AD7877WACPZ-REEL7

Touch Screen Controller

Analog Devices 

AD7877

Data Sheet

Pin No.

28

29

30

31

Mnemonic

VDRIVE

ARNG

AOUT

VREF

Description

Logic Power Supply Input. The voltage supplied at this pin determines the operating voltage for the serial

interface of the AD7877.

When the DAC is in current output mode, a resistor from ARNG to GND sets the output range.

Analog Output Voltage or Current from DAC.

Reference Output for the AD7877. The internal 2.5 V reference is available on this pin for use external to the

device. The reference output must be buffered before it is applied elsewhere in a system. To reduce system

noise effects, it is strongly recommended to place a capacitor of 100 nF between the VREF pin and GND.

Alternatively, an external reference can be applied to this input. The voltage range for the external reference is

1.0 V to VCC. For the specified performance, it is 2.5 V on the AD7877.

Rev. E | Page 8 of 45

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