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| 型号： | AD9281ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/15页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT DUAL CMOS 28-SSOP |
| 产品培训模块： | ADC Applications ADC Architectures ADC DC/AC Performance |
| 标准包装： | 47 |
| 位数： | 8 |
| 采样率（每秒）： | 28M |
| 数据接口： | 并联 |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 260mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，单极；2 个差分，单极 |
| 产品目录页面： | 780 (CN2011-ZH PDF) |
AD9281
–11–
QREFT
QREFB
IREFT
0.1 F10 F
0.1 F
AD9281
REFSENSE
AVSS
1V
0.1 F
10 F
IREFB
VREF
0.1 F
10k
ADC
CORE
INTERNAL
CONTROL
LOGIC
0.1 F
1.0 F
Figure 26. Reference Buffer Equivalent Circuit and
External Decoupling Recommendation
For best results in both noise suppression and robustness
against crosstalk, the 4-capacitor buffer decoupling arrangement
shown in Figure 26 is recommended. This decoupling should
–3
–0.5
THD
–
dB
–13
–23
–33
–43
–53
–63
–73
0
0.5
1
1.5
CML – V
2V
1V
a. Differential Input, 3 V Supplies
–35
–0.5
THD
–
dB
–40
–45
–50
–55
–60
–65
–70
0
0.5
1
1.5
CML – V
2
2.5
1V
2V
b. Differential Input, 5 V Supplies
Figure 27. THD vs. CML Input Span and Power Supply (Analog Input = 1 MHz)
–15
–0.5
THD
–
dB
–25
–35
–45
–55
–65
0
0.5
1
1.5
CML – V
2V
1V
c. Single-Ended Input, 3 V Supplies
–15
–0.5
THD
–
dB
–25
–35
–45
–55
–65
0
0.5
1
1.5
CML – V
2V
1V
2
2.5
d. Single-Ended Input, 5 V Supplies
feature chip capacitors located close to the converter IC. The
capacitors are connected to either IREFT/IREFB or QREFT/
QREFB. A connection to both sides is not required.
COMMON-MODE PERFORMANCE
Attention to the common-mode point of the analog input volt-
age can improve the performance of the AD9281. Figure 27
illustrates THD as a function of common-mode voltage (center
point of the analog input span) and power supply.
Inspection of the curves will yield the following conclusions:
1. An AD9281 running with AVDD = 5 V is the easiest to
drive.
2. Differential inputs are the most insensitive to common-mode
voltage.
3. An AD9281 powered by AVDD = 3 V and a single ended
input, should have a 1 V span with a common-mode voltage
of 0.75 V.
REV. F
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9281ARSZ | 制造商:Analog Devices 功能描述:IC 8BIT ADC SMD 9281 SOIC28 |
| AD9281ARSZRL | 功能描述:IC ADC 8BIT DUAL CMOS 28SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD9281-EB | 制造商:Analog Devices 功能描述:DEV TOOLS, EVAL BD FOR AD9281 - Bulk |
| AD9283 | 制造商:AD 制造商全称:Analog Devices 功能描述:8-Bit, 50 MSPS/80 MSPS/100 MSPS 3 V A/D Converter |
| AD9283/PCB | 制造商:Analog Devices 功能描述:8 BIT 100 MSPS 3.3V A/D CONVERTER - Bulk |
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