參數(shù)資料
型號: AD5545
廠商: Analog Devices, Inc.
英文描述: Dual, Current-Output, Serial-Input, 16-/14-Bit DAC
中文描述: 雙通道,電流輸出,串行輸入,16-/14-Bit援
文件頁數(shù): 7/16頁
文件大小: 1419K
代理商: AD5545
AD5545/AD5555
Rev. 0 | Page 7 of 16
02918-0-003
A1
SDI
CLK
CS
t
CSS
t
DS
t
DH
t
CH
t
CL
t
LDAC
t
CSH
t
LDS
t
LDH
LDAC
A0
INPUT REG LD
D1
D0
D15
D14
D13
D12
D11
D10
Figure 3. AD5545 18-Bit Data Word Timing Diagram
02918-0-004
A1
SDI
CLK
CS
t
CSS
t
DS
t
DH
t
CH
t
CL
t
LDAC
t
CSH
t
LDS
t
LDH
LDAC
A0
INPUT REG LD
D1
D0
D13
D12
D11
D10
D09
D08
Figure 4. AD5555 16-Bit Data Word Timing Diagram
Table 4. AD5545 Control Logic Truth Table
CS
CLK
LDAC
H
X
H
L
L
H
L
+
H
RS
H
H
H
MSB
X
X
X
Serial Shift Register Function
No Effect
No Effect
Shift Register Data
Advanced One Bit
No Effect
No Effect
Input Register Function
Latched
Latched
Latched
DAC Register
Latched
Latched
Latched
L
+
H
L
H
H
H
H
X
X
Latched
Selected DAC Updated
with Current SR Current
Latched
Latched
Latched
Latched Data = 0x0000
Latched Data = 0x8000
Latched
Latched
H
H
H
H
H
X
X
X
X
X
L
H
+
H
H
H
H
H
L
L
X
X
X
0
H
No Effect
No Effect
No Effect
No Effect
No Effect
Transparent
Latched
Latched
Latched Data = 0x0000
Latched Data = 0x8000
NOTES
1. SR = Shift Register,
+ = Positive Logic Transition, and X = Don’t Care.
2. At power-on, both the input register and the DAC register are loaded with all 0s.
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