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DAC7678SPW Datasheet(PDF) 32 Page - Texas Instruments

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Part # DAC7678SPW
Description  12-Bit, Octal-Channel, Ultra-Low Glitch, Voltage Output, Two-Wire Interface Digital-to-Analog Converter with 2.5V Internal Reference
PDF  52 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

DAC7678SPW Datasheet(HTML) 32 Page - Texas Instruments

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DAC7678
SBAS493A – FEBRUARY 2010 – REVISED AUGUST 2010
www.ti.com
Table 17. Control Matrix for Write Commands (continued)
COMMAND AND ACCESS BYTE
MOST SIGNIFICANT DATA BYTE
LEAST SIGNIFICANT DATA BYTE
DESCRIPTION
C3
C2
C1
C0
A3
A2
A1
A0
DB15
DB14
DB13
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Write to Select DAC Input Register and Update All DAC Registers (Global Software LDAC)
Write to DAC input register of channel A and
0
0
1
0
0
0
0
0
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel B and
0
0
1
0
0
0
0
1
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel C and
0
0
1
0
0
0
1
0
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel D and
0
0
1
0
0
0
1
1
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel E and
0
0
1
0
0
1
0
0
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel F and
0
0
1
0
0
1
0
1
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel G and
0
0
1
0
0
1
1
0
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Write to DAC input register of channel H and
0
0
1
0
0
1
1
1
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
0
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Invalid code, no action performed
Broadcast mode–write to all input registers and
0
0
1
0
1
1
1
1
Data[11:4]
Data[3:0]
X
X
X
X
update all DAC registers
Power-Down Register
0
1
0
0
X
X
X
X
X
PD1
PD0
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
X
X
X
X
X
0
1
0
0
X
X
X
X
X
0
0
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
X
X
X
X
X
Each DAC bit set to '1' powers on selected DACs
Each DAC bit set to '1' powers down selected
0
1
0
0
X
X
X
X
X
0
1
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
X
X
X
X
X
DACs. VOUT connected to GND through 1kΩ
pull-down resistor
Each DAC bit set to '1' powers down selected
0
1
0
0
X
X
X
X
X
1
0
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
X
X
X
X
X
DACs. VOUT connected to GND through 100kΩ
pull-down resistor
Each DAC bit set to '1' powers down selected
0
1
0
0
X
X
X
X
X
1
1
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
X
X
X
X
X
DACs. VOUT is High Z
Clear Code Register
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CL1
CL0
X
X
X
X
Write to clear code register, CLR pin will clear to
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
X
X
X
X
zero scale
Write to clear code register, CLR pin will clear to
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
midscale
Write to clear code register, CLR pin will clear to
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
0
X
X
X
X
full scale
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1
X
X
X
X
Write to clear code register disables CLR pin
LDAC Register
When all DAC bits are set to '1', selected DACs
ignore the LDAC pin.
0
1
1
0
X
X
X
X
DAC H
DAC G
DAC F
DAC E
DAC D
DAC C
DAC B
DAC A
X
X
X
X
X
X
X
X
When all DAC bits are set to '0', selected DAC
registers update according to the LDAC pin.
32
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Product Folder Link(s): DAC7678



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