AK9844A Ver la hoja de datos (PDF) - Asahi Kasei Microdevices
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AK9844A Datasheet PDF : 17 Pages
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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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