AK9844A Datasheet, PDF (1/17 Pages) Asahi Kasei Microsystems – 4Kbit EEPROM with 4ch 8bit D/A Converter

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