参数资料
型号: AD7942BCPZRL
厂商: Analog Devices Inc
文件页数: 20/24页
文件大小: 0K
描述: IC ADC 14BIT SAR 250KSPS 10LFCSP
标准包装: 5,000
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): 1.25mW
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: 10-WFDFN 裸露焊盘,CSP
供应商设备封装: 10-LFCSP-WD(3x3)
包装: 带卷 (TR)
输入数目和类型: 1 个伪差分,单极
配用: EVAL-AD7942CB-ND - BOARD EVALUATION FOR AD7942
AD7942
Rev. B | Page 5 of
24
TIMING SPECIFICATIONS
VDD = 4.5 V to 5.5 V1, VIO = 2.3 V to 5.5 V or VDD + 0.3 V, whichever is the lowest, unless otherwise stated, TA = 40°C to +85°C.
Table 3.
Parameter
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Available Data
tCONV
0.5
2.2
μs
Acquisition Time
tACQ
1.8
μs
Time Between Conversions
tCYC
4
μs
CNV Pulse Width (CS Mode)
tCNVH
10
ns
SCK Period (CS Mode)
tSCK
15
ns
SCK Period (Chain Mode)
tSCK
VIO ≥ 4.5 V
17
ns
VIO ≥ 3 V
18
ns
VIO ≥ 2.7 V
19
ns
VIO ≥ 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
5
ns
SCK Falling Edge to Data-Valid Delay
tDSDO
VIO ≥ 4.5 V
14
ns
VIO ≥ 3 V
15
ns
VIO ≥ 2.7 V
16
ns
VIO ≥ 2.3 V
17
ns
CNV or SDI Low to SDO D13 MSB Valid (CS Mode)
tEN
VIO ≥ 4.5 V
15
ns
VIO ≥ 2.7 V
18
ns
VIO ≥ 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
5
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 ≥ 4.5 V
15
ns
VIO ≥ 2.3 V
26
ns
1 See Figure 2 and Figure 3 for load conditions.
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