参数资料
型号: AD7949BCPZRL7
厂商: Analog Devices Inc
文件页数: 29/32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: 1,500
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: 带卷 (TR)
输入数目和类型: *
AD7949
Data Sheet
Rev. D | Page 6 of 32
TIMING SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 1.8 V to VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter1
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
tCONV
2.2
s
Acquisition Time
tACQ
1.8
s
Time Between Conversions
tCYC
4.0
s
Data Write/Read During Conversion
tDATA
1.0
s
CNV Pulse Width
tCNVH
10
ns
SCK Period
tSCK
tDSDO + 2
ns
SCK Low Time
tSCKL
11
ns
SCK High Time
tSCKH
11
ns
SCK Falling Edge to Data Remains Valid
tHSDO
4
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
23
ns
VIO Above 1.8 V
28
ns
CNV Low to SDO D15 MSB Valid
tEN
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
22
ns
VIO Above 1.8 V
25
ns
CNV High or Last SCK Falling Edge to SDO High Impedance
tDIS
32
ns
CNV Low to SCK Rising Edge
tCLSCK
10
ns
DIN Valid Setup Time from SCK Rising Edge
tSDIN
5
ns
DIN Valid Hold Time from SCK Rising Edge
tHDIN
5
ns
1
See Figure 2 and Figure 3 for load conditions.
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