参数资料
| 型号： | AD5737ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 32/44页 |
| 文件大小： | 0K |
| 描述： | IC DAC QUAD 12BIT CUR 64-LFCSP |
| 标准包装： | 1 |
| 设置时间： | 15µs |
| 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 |
| 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： | 托盘 |
| 输出数目和类型： | 4 电流，单极 |
| 采样率（每秒）： | * |
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AD5737
Data Sheet
Rev. C | Page 38 of 44
AICC SUPPLY REQUIREMENTS—SLEWING
The AICC current requirement while slewing is greater than in
static operation because the output power increases to charge
the output capacitance of the dc-to-dc converter. This transient
current can be quite large (see Figure 57), although the methods
described in the Reducing AICC Current Requirements section
can reduce the requirements on the AVCC supply.
If not enough AICC current can be provided, the AVCC voltage
drops. Due to this AVCC drop, the AICC current required for
slewing increases further, causing the voltage at AVCC to drop
further (see Equation 3). In this case, the VBOOST_x voltage and,
therefore, the output voltage, may never reach their intended
values. Because the AVCC voltage is common to all channels,
this voltage drop may also affect other channels.
0
5
10
15
20
25
30
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
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)
AI
CC
CURRE
NT
(
A)
TIME (ms)
AICC
IOUT
VBOOST
0mA TO 24mA RANGE
1k LOAD
fSW = 410kHz
INDUCTOR = 10H (XAL4040-103)
TA = 25°C
10067-
184
Figure 57. AICC Current vs. Time for 24 mA Step Through 1 k Load
with Internal Compensation Resistor
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 58 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 59.
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
10067-
185
Figure 58. 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
(
m
A)/
V
B
OOS
T
_
x
VO
LT
A
G
E
(V)
TIME (ms)
AICC
IOUT
VBOOST
10067-
186
Figure 59. AICC Current vs. Time for 24 mA Step Through 500 Load
with External 51 k Compensation Resistor
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相关代理商/技术参数 |
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| 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 |
| AD5737X | 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 |
| AD573JD | 功能描述:IC ADC 10BIT SAR REG 20-CDIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| AD573JN | 功能描述:IC ADC 10BIT SAR REGISTER 20-DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD573JNZ | 功能描述:IC ADC 10BIT SAR REGISTER 20-DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
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