AD5554BRS データシートの表示（PDF） - Analog Devices
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AD5554BRS Datasheet PDF : 16 Pages
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AD5544/AD5554
SDI
A1 A0 D15 D14 D13 D12 D11 D10
CLK
CS
LDAC
tCSS
tDS
tDH
tCH
tCL
tPD
SDO
Figure 2. AD5544 Timing Diagram
D1 D0
INPUT
REG
LD
tCSH
tLDS
tLDAC
tLDH
SDI
A1 A0 D13 D12 D11 D10 D09 D08
CLK
CS
LDAC
tCSS
tDS
tDH
tCH
tCL
tPD
SDO
Figure 3. AD5554 Timing Diagram
D1 D0
INPUT
REG
LD
tCSH
tLDS
tLDAC
tLDH
CS CLK
HX
LL
L ↑+
LH
↑+ L
HX
HX
HX
HX
HX
LDAC RS
H
H
H
H
H
H
H
H
H
H
L
H
H
H
↑+
H
H
L
H
L
Table I. AD5544 Control-Logic Truth Table
MSB Serial Shift Register Function
Input Register Function DAC Register
X
No Effect
Latched
Latched
X
No Effect
Latched
Latched
X
Shift-Register-Data Advanced One Bit Latched
Latched
X
No Effect
Latched
Latched
X
No Effect
Selected DAC Updated Latched
with Current SR Contents
X
No Effect
Latched
Transparent
X
No Effect
Latched
Latched
X
No Effect
Latched
Latched
0
No Effect
H
No Effect
Latched Data = 0000H
Latched Data = 8000H
Latched Data = 0000H
Latched Data = 8000H
–6–
REV. 0
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