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| 型号： | AD7949BCPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 23/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 250KSPS 8CH 20LFCSP |
| 产品培训模块： | Power Line Monitoring |
| 产品变化通告： | Startup Circuitry Design Improvement Change 15/April/2009 |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| 位数： | 14 |
| 采样率（每秒）： | 250k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 15.5mW |
| 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： | 20-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-VQ |
| 包装： | 托盘 |
| 输入数目和类型： | * |
| 产品目录页面： | 780 (CN2011-ZH PDF) |
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Data Sheet
AD7949
Rev. D | Page 3 of 32
REVISION HISTORY
3/12—Rev. C to Rev. D
Changes to Figure 26 ......................................................................16
Changes to Internal Reference/Temperature Sensor Section....19
Changes to External Reference and Internal Buffer Section.....20
Changes to Bits[5:3] Function, Table 9.........................................24
Updated Outline Dimensions........................................................32
8/11—Rev. B to Rev. C
Changes to Internal Reference Section ........................................18
Changes to External Reference and Internal Buffer Section and
External Reference Section ............................................................19
Changes to Bits[5:3] Function, Table 9.........................................22
5/09—Rev. A to Rev. B
Changes to Features Section, Applications Section, and
Figure 1 ...............................................................................................1
Changes to Specifications Section...................................................3
Changes to Timing Specifications Section.....................................5
Changes to Table 5 ............................................................................7
Changes to Figure 4 and Table 6 .....................................................8
Changes to Figure 20 ......................................................................11
Changes to Converter Operation Section....................................13
Changes to Table 7 ..........................................................................14
Changes to Figure 25 and Figure 26 .............................................15
Changes to Bipolar Single Supply Section, Input Structure
Section, and Selectable Low-Pass Filter Section .........................16
Changes to Input Configurations Section, Sequencer Section,
and Source Resistance Section.......................................................17
Changes to Internal Reference/Temperature Sensor Section....18
Added Figure 30; Renumbered Sequentially...............................18
Changes to External Reference and Internal Buffer Section,
External Reference Section, and Reference Decoupling
Section ..............................................................................................19
Added Figure 31 and Figure 32.....................................................19
Changes to Power Supply Section.................................................20
Changed Reading/Writing During Conversion, Fast Hosts
Section to Reading/Writing After Conversion,
Any Speed Hosts .............................................................................21
Changes to Configuration Register, CFG Section and
Table 9...............................................................................................22
Added General Timing Without a Busy Indicator Section and
Figure 36...........................................................................................23
Added General Timing with a Busy Indicator Section and
Figure 37...........................................................................................24
Added Channel Sequencer Section, Examples Section, and
Figure 38...........................................................................................25
Changes to Read/Write Spanning Conversion Without a Busy
Indicator Section and Figure 40 ....................................................26
Changes to Read/Write Spanning Conversion with a Busy
Indicator Section and Figure 42 ....................................................27
Changes to Evaluating AD7949 Performance Section...............28
Added Exposed Pad Notation to Outline Dimensions..............29
Changes to Ordering Guide...........................................................29
5/08—Rev. 0 to Rev. A
Changes to Ordering Guide...........................................................26
5/08—Revision 0: Initial Version
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