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参数资料
| 型号： | AD5735ACPZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 39/48页 |
| 文件大小： | 0K |
| 描述： | IC DAC QUAD VOLT CUR 64LFCSP |
| 标准包装： | 750 |
| 设置时间： | 18µs |
| 位数： | 12 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 4 |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 64-LFCSP-VQ（9x9） |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 4 电流，4 电压 |
| 采样率（每秒）： | * |
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AD5735
Data Sheet
Rev. C | Page 44 of 48
Reducing AICC Current Requirements
Two main methods can be used to reduce the AICC current
requirements. One method is to add an external compensation
resistor, and the other is to use slew rate control. These methods
can be used together.
Adding an External Compensation Resistor
A compensation resistor can be placed at the COMPDCDC_x pin
in series with the 10 nF compensation capacitor. A 51 k exter-
nal compensation resistor is recommended. This compensation
increases the slew time of the current output but reduces the AICC
transient current requirements. Figure 80 shows a plot of AICC
current for a 24 mA step through a 1 k load when using a 51 k
compensation resistor. The compensation resistor reduces the
current requirements through smaller loads even further, as
shown in Figure 81.
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
(
m
A
)/
V
B
OOS
T
_
x
VO
LT
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
09961-
185
Figure 80. 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
LT
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
09961-
186
Figure 81. AICC Current vs. Time for 24 mA Step Through 500 Load
with External 51 k Compensation Resistor
Using Slew Rate Control
Using slew rate control can greatly reduce the current require-
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
(
m
A
)/
V
B
OOS
T
_
x
VO
LT
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
09961-
187
Figure 82. AICC Current vs. Time for 24 mA Step Through 1 k Load
with Slew Rate Control
When using slew rate control, it is important to remember that
the output cannot slew faster than the dc-to-dc converter. The
dc-to-dc converter slews slowest at higher currents through large
loads (for example, 1 k). The slew rate is also dependent on
the configuration of the dc-to-dc converter. Two examples of
the dc-to-dc converter output slew are shown in Figure 80 and
dc-to-dc converter.)
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| AD5737 | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Channel, 16-Bit, Serial Input, 4-20mA Output DAC, Dynamic Power Control, HART Connectivity |
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| AD5737ACPZ | 功能描述:IC DAC QUAD 12BIT CUR 64-LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:1 系列:- 设置时间:4.5µs 位数:12 数据接口:串行，SPI? 转换器数目:1 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOICN 包装:剪切带 (CT) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:* 其它名称:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| AD5737ACPZ-RL7 | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output |
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