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AD7305BRU 数据表(PDF) 5 Page - Analog Devices

部件名 AD7305BRU
功能描述  3 V/5 V, Rail-to-Rail Quad, 8-Bit DAC
Download  14 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7305BRU 数据表(HTML) 5 Page - Analog Devices

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–5–
AD7304/AD7305
REV. A
Table III. AD7305 Control Logic Truth Table
WR
A1
A0
LDAC Input Register Function
DAC Register Function
LLLH
REG A Loaded with DB0–DB7
Latched with Previous Contents, No Change
↑+
L
L
H
REG A Latched with DB0–DB7
Latched with Previous Contents, No Change
L
L
H
H
REG B Loaded with DB0–DB7
Latched with Previous Contents, No Change
↑+
L
H
H
REG B Latched with DB0–DB7
Latched with Previous Contents, No Change
L
H
L
H
REG C Loaded with DB0–DB7
Latched with Previous Contents, No Change
↑+
H
L
H
REG C Latched with DB0–DB7
Latched with Previous Contents, No Change
L
H
H
H
REG D Loaded with DB0–DB7
Latched with Previous Contents, No Change
↑+
H
H
H
REG D Latched with DB0–DB7
Latched with Previous Contents, No Change
H
X
X
L
No Effect
All Input Register Contents Loaded, Register Transparent
L
X
X
L
Input REG x Transparent to DB0–DB7
Register Transparent
HX
X
↑+
No Effect
All Input Register Contents Latched
H
X
X
H
No Effect, Device Not Selected
No Effect, Device Not Selected
NOTES
1
↑+ positive logic transition; ↓– negative logic transition; X Don’t Care.
2
LDAC is a level sensitive input.
PIN CONFIGURATIONS
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
VOUTB
VOUTA
VSS
VREFB
VREFA
GND
LDAC
CLR
VOUTC
VOUTD
VDD
VREFC
VREFD
SDI/SHDN
CLK
CS
AD7304
TOP VIEW
(Not to Scale)
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
AD7305
DB5
DB6
VOUTA
VSS
VREF
DB7
LDAC
GND
DB2
DB1
VOUTD
VDD
A0/SHDN
DB0
WR
A1
VOUTB
VOUTC
DB4
DB3
tAH
tDH
tLH
tLDW
tWR
tAS
tDS
tLS
tS
1 LSB
ERROR BAND
A0, A1
WR
D0–D7
LDAC
VOUT
Figure 4. AD7305 Timing Diagram
tSDR
A0/SHDN
IDD
tSDN
Figure 5. AD7305 Timing Diagram


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