參數(shù)資料
型號: EVAL-AD5755SDZ
廠商: Analog Devices Inc
文件頁數(shù): 40/52頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR AD5755
視頻文件: AD5755: 16-Bit Multi-Channel, Voltage and Current Output DAC
標(biāo)準(zhǔn)包裝: 1
DAC 的數(shù)量: 4
位數(shù): 16
數(shù)據(jù)接口: 串行
設(shè)置時(shí)間: 11µs
DAC 型: 電流/電壓
工作溫度: -40°C ~ 105°C
已供物品:
已用 IC / 零件: AD5755
Data Sheet
AD5755
Rev. C | Page 45 of 52
0
4
12
8
16
24
20
28
32
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
AI
CC
CURRE
NT
(
A)
0mA TO 24mA RANGE
1k LOAD
fSW = 410kHz
INDUCTOR = 10H (XAL4040-103)
TA = 25°C
0
0.5
1.0
1.5
2.0
2.5
I O
UT
_
x
CURRE
NT
(
mA
)/
V
B
OOS
T
_
x
VO
LT
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
07304-
185
Figure 81. AICC Current vs. Time for 24 mA Step Through 1 k Load
with External 51 k Compensation Resistor
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
AI
CC
CURRE
NT
(
A)
0mA TO 24mA RANGE
500 LOAD
fSW = 410kHz
INDUCTOR = 10H (XAL4040-103)
TA = 25°C
0
4
12
8
16
24
20
28
32
0
0.5
1.0
1.5
2.0
2.5
I O
UT
_
x
CURRE
NT
(
mA)
/V
B
OOS
T
_
x
VO
L
T
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
07304-
186
Figure 82. AICC Current vs. Time for 24 mA Step Through 500 Load
with External 51 k Compensation Resistor
Using slew rate control can greatly reduce the AVCC supplies
current requirements, as shown in Figure 83. When using slew
rate control, attention should be paid to the fact that the output
cannot slew faster than the dc-to-dc converter. The dc-to-dc
converter slews slowest at higher currents through large (for
example, 1 k) loads. This slew rate is also dependent on the
dc-to-dc converter configuration. Two examples of the dc-to-dc
converter output slew are shown in Figure 81 and Figure 82
(VBOOST corresponds to the dc-to-dc converter’s output voltage).
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
AI
CC
CURRE
NT
(
A)
0mA TO 24mA RANGE
1k LOAD
fSW = 410kHz
INDUCTOR = 10H (XAL4040-103)
TA = 25°C
0
4
12
8
16
24
20
28
32
0
1
2
3
4
5
6
I O
UT
_
x
CURRE
NT
(
mA
)/
V
B
OOS
T
_
x
VO
LT
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
07304-
187
Figure 83. AICC Current vs. Time for 24 mA Step Through 1 k Load
with Slew Rate Control
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