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| 型号： | AD9280ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC CMOS 8BIT 32MSPS 28-SSOP |
| 产品变化通告： | AD9280 Pin Configuration Description Change 21/Apr/2010 |
| 标准包装： | 47 |
| 位数： | 8 |
| 采样率（每秒）： | 32M |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 110mW |
| 电压电源： | 单电源 |
| 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： | 1 个单端，单极 |
| 产品目录页面： | 780 (CN2011-ZH PDF) |
AD9280
–11–
The actual reference voltages used by the internal circuitry of
the AD9280 appear on REFTF and REFBF. For proper opera-
tion, it is necessary to add a capacitor network to decouple these
pins. The REFTF and REFBF should be decoupled for all
internal and external configurations as shown in Figure 17.
AD9280
REFTF
REFBF
0.1 F
10 F
0.1 F
Figure 17. Reference Decoupling Network
Note: REFTF = reference top, force
REFBF = reference bottom, force
REFTS = reference top, sense
REFBS = reference bottom, sense
INTERNAL REFERENCE OPERATION
Figures 18, 19 and 20 show sample connections of the AD9280
internal reference in its most common configurations. (Figures
18 and 19 illustrate top/bottom mode while Figure 20 illustrates
center span mode). Figure 29 shows how to connect the AD9280
for 1 V p-p differential operation. Shorting the VREF pin
directly to the REFSENSE pin places the internal reference
amplifier, A1, in unity-gain mode and the resultant reference
output is 1 V. In Figure 18 REFBS is grounded to give an input
range from 0 V to 1 V. These modes can be chosen when the
supply is either +3 V or +5 V. The VREF pin must be bypassed to
AVSS (analog ground) with a 1.0
F tantalum capacitor in
parallel with a low inductance, low ESR, 0.1
F ceramic capacitor.
1V
0V
MODE
AVDD
10k
A/D
CORE
4.2k
TOTAL
REFTS
REFBS
10 F
0.1 F
REFTF
REFBF
0.1 F
AIN
0.1 F
AD9280
10k
REF
SENSE
VREF
1V
A2
SHA
A1
0.1 F
1.0 F
Figure 18. Internal Reference—1 V p-p Input Span
(Top/Bottom Mode)
Figure 19 shows the single-ended configuration for 2 V p-p
operation. REFSENSE is connected to GND, resulting in a 2 V
reference output.
2V
0V
MODE
AVDD
10k
A/D
CORE
4.2k
TOTAL
REFTS
REFBS
10 F
0.1 F
REFTF
REFBF
0.1 F
AIN
0.1 F
AD9280
10k
REF
SENSE
VREF
A1
1V
SHA
A2
0.1 F
1.0 F
Figure 19. Internal Reference, 2 V p-p Input Span
(Top/Bottom Mode)
Figure 20 shows the single-ended configuration that gives the
good high frequency dynamic performance (SINAD, SFDR).
To optimize dynamic performance, center the common-mode
voltage of the analog input at approximately 1.5 V. Connect the
shorted REFTS and REFBS inputs to a low impedance 1.5 V
source. In this configuration, the MODE pin is driven to a volt-
age at midsupply (AVDD/2).
Maximum reference drive is 1 mA. An external buffer is re-
quired for heavier loads.
AVDD/2
+1.5V
2V
1V
MODE
10k
A/D
CORE
4.2k
TOTAL
REFTS
REFBS
10 F
0.1 F
REFTF
REFBF
0.1 F
AIN
0.1 F
AD9280
10k
REF
SENSE
VREF
1V
SHA
A2
A1
0.1 F
1.0 F
Figure 20. Internal Reference 1 V p-p Input Span
(Center Span Mode)
REV. E
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9280ARSZRL | 功能描述:IC ADC 8BIT CMOS 32MSPS 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:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD9280-EB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9280 - Bulk |
| AD9280JRS | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 8-Bit |
| AD9280JRSRL | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 8-Bit |
| AD9281 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual Channel 8-Bit Resolution CMOS ADC |
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