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PDF AK9813A Data sheet ( Hoja de datos )
| Número de pieza | AK9813A | |
| Descripción | 12ch 8bit D/A Converter with EEPROM | |
| Fabricantes | Asahi Kasei Microsystems | |
| Logotipo |  |
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ASAHI KASEI
[AK9813A]
AK9813A
12ch 8bit D/A Converter with EEPROM
General Description
The AK9813A includes 12 channel, 8bit D/A converters with on-chip output buffer amps and it is capable to
store the input digital data of each DAC by on-chip non-volatile CMOS EEPROM. The AK9813A is optimally
designed for various circuit adjustments for consumer and industrial equipments and it is ideally suited for
replacing mechanical trimmers.
Features
EEPROM SECTION
• 12 words Õ 8bit Õ 4 organization for DAC
D/A converter section
• 12 channels
• Resolution : 8bit
• DNL
: -1a+2 LSB
• INL
: 1.5 LSB
• Analog Output Voltage Range : GND a VCC
Operating Voltage Range
• Digital section : 2.7Va5.5V
• Analog section : 5.0V0.5V,3.3V0.3V
24pin VSOP
DAD03E-00
Block Diagram
-1-
1999/05
1 page  
ASAHI KASEI
[AK9813A]
Data Configuration
AK9813A have a shift register in order to control the chip.
When the SEL pin is "H"(CS I/F), the shift register becomes 16bit configuration and the data on the DI pin
should be loaded with LSB first. When the SEL pin is "L"(LD I/F), the shift register becomes 14bit
configuration and the data on the DI pin is loaded with MSB first.
The following description shows the configuration of the shift register.
The data set consist of 2-bits for the control of the internal EEPROM, 2-bits for the address of the EEPROM
(CS I/F only), 4-bits for select of D/A converter and 8-bits for the digital input data of the 8bit D/A converter and
total data set is 16bits or 14bits.
{1 Shift register configuration : SEL=High(CS I/F)
OUTPUT VOLTAGE FOR D/A CONVERTER
D7 D6 D5 D4 D3 D2 D1 D0 OUTPUT VOLTAGE FOR D/A
0
0
0
0
0
0
0
0
=•
•
GND=VSS
0
0
0
0
0
0
0
1
•=
•
VDD/255
Õ
1
0
0
0
0
0
0
1
0
=•
•
VDD/255
Õ
2
1
1
1
1
1
1
1
0
=•
•
VDD/255
Õ
254
1 1 1 1 1 1 1 1 •= VDD
•
A1 A0 EEPROM ADDRESS
0 1 ADDRESS : 0
0 1 ADDRESS : 1
1 0 ADDRESS : 2
1 1 ADDRESS : 3
D/A CONVERTER CHANNEL SELECTION
D11 D10 D9 D8
D/A CHANNEL
0000
Don't Care
0001
AO1
0010
AO2
0011
AO3
0100
AO4
0101
AO5
0110
AO6
0111
AO7
D11 D10 D9
100
100
101
101
110
110
111
111
D8
0
1
0
1
0
1
0
1
D/A CHANNEL
AO8
AO9
AO10
AO11
AO12
Can't use
Can't use
Don't Care
(NOTE) Above "Don't care" state is valid only when AK9813A is in DAC mode or WRITE mode.
Refer to the following section "Instruction Set" about mode.
DAD03E-00
-5-
1999/05
5 Page 
ASAHI KASEI
{2 Timing Diagram for LD I/F (SEL ="L")
1.DAC mode:The internal EEPROM is not used.
[AK9813A]
2.WRITE ENABLE/DISABLE mode:The programming state of internal EEPROM is set.
3.CALL mode: The output of the D/A is set by the data in the internal EEPROM.
DAD03E-00
- 11 -
1999/05
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet AK9813A.PDF ] | |
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