参数资料
型号: AD7690BRMZ
厂商: Analog Devices Inc
文件页数: 20/24页
文件大小: 0K
描述: IC ADC 18BIT 400KSPS 10MSOP
标准包装: 1
系列: PulSAR®
位数: 18
采样率(每秒): 400k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 20mW
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: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 管件
输入数目和类型: 1 个差分,双极
产品目录页面: 778 (CN2011-ZH PDF)
AD7690
Rev. B | Page 5 of 24
TIMING SPECIFICATIONS
VDD = 4.75 V to 5.25 V, VIO = 2.3 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 4. 1
Parameter
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
tCONV
0.5
2.1
μs
Acquisition Time
tACQ
400
ns
Time Between Conversions
tCYC
2.5
μs
CNV Pulse Width (CS Mode)
tCNVH
10
ns
SCK Period (CS Mode)
tSCK
15
ns
SCK Period (Chain Mode)
tSCK
VIO Above 4.5 V
17
ns
VIO Above 3 V
18
ns
VIO Above 2.7 V
19
ns
VIO Above 2.3 V
20
ns
SCK Low Time
tSCKL
7
ns
SCK High Time
tSCKH
7
ns
SCK Falling Edge to Data Remains Valid
tHSDO
4
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO Above 4.5 V
14
ns
VIO Above 3 V
15
ns
VIO Above 2.7 V
16
ns
VIO Above 2.3 V
17
ns
CNV or SDI Low to SDO D17 MSB Valid (CS Mode)
tEN
VIO Above 4.5 V
15
ns
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
22
ns
CNV or SDI High or Last SCK Falling Edge to SDO High Impedance (CS Mode)
tDIS
25
ns
SDI Valid Setup Time from CNV Rising Edge (CS Mode)
tSSDICNV
15
ns
SDI Valid Hold Time from CNV Rising Edge (CS Mode)
tHSDICNV
0
ns
SCK Valid Setup Time from CNV Rising Edge (Chain Mode)
tSSCKCNV
5
ns
SCK Valid Hold Time from CNV Rising Edge (Chain Mode)
tHSCKCNV
10
ns
SDI Valid Setup Time from SCK Falling Edge (Chain Mode)
tSSDISCK
3
ns
SDI Valid Hold Time from SCK Falling Edge (Chain Mode)
tHSDISCK
4
ns
SDI High to SDO High (Chain Mode with BUSY Indicator)
tDSDOSDI
VIO Above 4.5 V
15
ns
VIO Above 2.3 V
26
ns
1 See Figure 3 and Figure 4 for load conditions.
500
μAIOL
500
μAIOH
1.4V
TO SDO
CL
50pF
02968-002
Figure 3. Load Circuit for Digital Interface Timing
30% VIO
70% VIO
2V OR VIO – 0.5V1
0.8V OR 0.5V2
2V OR VIO – 0.5V1
tDELAY
02968-003
NOTES:
1. 2V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V.
2. 0.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
Figure 4. Voltage Levels for Timing
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