AD7304BN AD [Analog Devices], AD7304BN Datasheet - Page 5

• Manufacturer Part Number: AD7304BN
• Description: +3 V/+5 V, Rail-to-Rail Quad, 8-Bit DAC
• Manufacturer: AD [Analog Devices]

REV. A
WR
L
↑+
L
↑+
L
↑+
L
↑+
H
L
H
H
NOTES
1
2
↑+ positive logic transition; ↓– negative logic transition; X Don’t Care.
LDAC is a level sensitive input.
A0/SHDN
A1
L
L
L
L
H
H
H
H
X
X
X
X
I
DD
A0, A1
D0–D7
LDAC
V
OUT
WR
Figure 4. AD7305 Timing Diagram
Figure 5. AD7305 Timing Diagram
A0
L
L
H
H
L
L
H
H
X
X
X
X
t
SDN
LDAC Input Register Function
H
H
H
H
H
H
H
H
L
L
↑+
H
t
t
WR
LS
t
t
AS
DS
t
S
REG A Loaded with DB0–DB7
REG A Latched with DB0–DB7
REG B Loaded with DB0–DB7
REG B Latched with DB0–DB7
REG C Loaded with DB0–DB7
REG C Latched with DB0–DB7
REG D Loaded with DB0–DB7
REG D Latched with DB0–DB7
No Effect
Input REG x Transparent to DB0–DB7
No Effect
No Effect, Device Not Selected
t
t
t
AH
DH
LH
Table III. AD7305 Control Logic Truth Table
ERROR BAND
1 LSB
t
t
LDW
SDR
–5–
V
V
V
V
LDAC
OUT
OUT
REF
REF
GND
CLR
DAC Register Function
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
Latched with Previous Contents, No Change
All Input Register Contents Loaded, Register Transparent
Register Transparent
All Input Register Contents Latched
No Effect, Device Not Selected
V
SS
B
A
A
B
1
2
3
4
5
6
7
8
(Not to Scale)
TOP VIEW
AD7304
PIN CONFIGURATIONS
16
15
14
13
12
11
10
9
V
V
V
V
V
SDI/SHDN
CLK
CS
OUT
OUT
DD
REF
REF
C
D
C
D
V
V
LDAC
AD7304/AD7305
OUT
OUT
V
GND
DB7
DB6
DB5
DB4
V
REF
SS
B
A
10
1
2
3
4
5
6
7
8
9
(Not to Scale)
TOP VIEW
AD7305
20
19
18
17
16
15
14
13
12
11
V
V
V
A0/SHDN
A1
WR
DB0
DB1
DB2
DB3
OUT
OUT
DD
C
D