AK9844A Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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AK9844A

4Kbit EEPROM with 4ch 8bit D/A Converter

Asahi Kasei Microdevices 

ASAHI KASEI

[AK9844A]

AK9844A

4Kbit EEPROM with 4ch 8bit D/A Converter

General Description

The AK9844A includes 4 channel, 8-bit D/A converters with on-chip output buffer amps and it is

capable to store the input digital data of each D/A converter by on-chip non-volatile CMOS

EEPROM. The AK9844A is optimally designed for various circuit adjustments for consumer and

industrial equipments and it is ideally suited for replacing mechanical trimmers.

Features

… EEPROM section

・4 word x 8-bit organization (Dedicated for DAC data)

・256 word x 16-bit organization (General purpose memory)

・Serial data interface

・Sequential register read

・Automatic write cycle

・100K write cycles

・10 year data retention

… D/A section

・4 channels

・Resolution

: 8-bits

・Differential Non-Linearity : ±1.0 LSB

・Linearity Error

: ±1.5 LSB

・Output Voltage Range : GND to VCC

… AUTO READ Function

… Power down mode

SK CS

VREF1

PROTECT

DI

DO

VCC

GND

Control Logic

Instruction

Register

Data

Register

8

8

EEPROM

4128bit

256 x 16bit

+ 4 x 8bit

Latch Decoder

8bit Latch 8 8bit D/A

--

+

AO0

8bit Latch 8 8bit D/A

--

+

AO1

8bit Latch 8 8bit D/A

--

+

AO2

8bit Latch 8 8bit D/A

--

+

AO3

DAD05E-00

PD

Block Diagram

VREF2

-1-

2005/03

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