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DAC7800 Datasheet(Folha de dados) 4 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Nome de Peças. DAC7800
descrição  Dual Monolithic CMOS 12-Bit Multiplying DIGITAL-TO-ANALOG CONVERTERS
Download  12 Pages
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Fbricantes  BURR-BROWN [Burr-Brown (TI)]
Página de início  http://www.burr-brown.com
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 4 page
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4
®
DAC7800, 01, 02
DAC7800
BLOCK DIAGRAM
DAC A
DAC B
DAC A Register
12
12
12
UPD B
I
AGND B
R
V
V
R
I
AGND A
UPD A
OUT B
FB B
REF B
REF A
FB A
OUT A
12
V
DD
9
DGND
10
15
16
14
13
4
3
2
1
6
DAC B Register
Bit 0
Bit 11
Bit 12
Bit 23
7
11
CLR
12
DAC7800
Data
In
5
CLK
8
CS
PIN CONFIGURATION
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
AGND A
CLK
UPD A
Data In
CS
AGND B
I
R
V
V
CLR
UPD B
DGND
OUT A
FB A
REF A
OUT B
DAC7800
Top View
DIP
I
R
V
FB B
REF B
DD
Data In
Bit 0
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
LSB
DAC A
MSB
DAC A
LSB
DAC B
MSB
DAC B
DAC7800 Data Input Sequence
DAC7800 Digital Interface Block Diagram
24-Bit
Shift Register
DAC A Register
UPD A
Data In
CLK
UPD B
LSB
MSB
DAC B Register
LSB
MSB
Bit
23
Bit
12
Bit
11
Bit
0
CLK
DATA INPUT FORMAT
CLK
UPD A
UPD B
CS
CLR
FUNCTION
X
X
X
X
0
All register contents set to 0’s (asynchronous).
X
X
X
1
X
No data transfer.
X
X
0
1
Input data is clocked into input register (location Bit 23) and previous data shifts.
X
0
1
0
1
Input register bits 23 (LSB)—12 (MSB) are loaded into DAC A.
X
1
0
0
1
Input register bits 11 (LSB)—0 (MSB) are loaded into DAC B.
X
0
0
0
1
Input register bits 23 (LSB)—12 (MSB) are loaded into DAC A, and input register bits 11 (LSB)—0 (MSB)
are loaded into DAC B.
X = Don’t care.
means falling edge triggered.
LOGIC TRUTH TABLE




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