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AD7688 数据表(PDF) 6 Page - Analog Devices

部件名 AD7688
功能描述  Dual Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7688 数据表(HTML) 6 Page - Analog Devices

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Data Sheet
AD7903
Rev. A | Page 5 of 28
TIMING SPECIFICATIONS
−40°C to +125°C, VDD = 2.37 V to 2.63 V, VIO = 2.3 V to 5.5 V, unless otherwise stated. See Figure 2 and Figure 3 for load conditions.
Table 4.
Parameter
Symbol
Min
Typ
Max
Unit
Conversion Time (CNVx Rising Edge to Data Available)
tCONV
500
710
ns
Acquisition Time
tACQ
290
ns
Time Between Conversions
tCYC
VIOx Above 2.3 V
1000
ns
CNVx Pulse Width (CS Mode)
tCNVH
10
ns
SCKx Period (CS Mode)
tSCK
VIOx Above 4.5 V
10.5
ns
VIOx Above 3 V
12
ns
VIOx Above 2.7 V
13
ns
VIOx Above 2.3 V
15
ns
SCKx Period (Chain mode)
tSCK
VIOx Above 4.5 V
11.5
ns
VIOx Above 3 V
13
ns
VIOx Above 2.7 V
14
ns
VIOx Above 2.3 V
16
ns
SCKx Low Time
tSCKL
4.5
ns
SCKx High Time
tSCKH
4.5
ns
SCKx Falling Edge to Data Remains Valid
tHSDO
3
ns
SCKx Falling Edge to Data Valid Delay
tDSDO
VIOx Above 4.5 V
9.5
ns
VIOx Above 3 V
11
ns
VIOx Above 2.7 V
12
ns
VIOx Above 2.3 V
14
ns
CNVx or SDIx Low to SDOx, D15 (MSB) Valid (CS Mode)
tEN
VIOx Above 3 V
10
ns
VIOx Above 2.3 V
15
ns
CNVx or SDIx High or Last SCKx Falling Edge to SDOx High Impedance (CS Mode)
tDIS
20
ns
SDIx Valid Setup Time from CNVx Rising Edge (CS Mode)
tSSDICNV
5
ns
SDIx Valid Hold Time from CNVx Rising Edge (CS Mode)
tHSDICNV
2
ns
SCKx Valid Setup Time from CNVx Rising Edge (Chain Mode)
tSSCKCNV
5
ns
SCKx Valid Hold Time from CNVx Rising Edge (Chain Mode)
tHSCKCNV
5
ns
SDIx Valid Setup Time from SCKx Falling Edge (Chain Mode)
tSSDISCK
2
ns
SDIx Valid Hold Time from SCKx Falling Edge (Chain Mode)
tHSDISCK
3
ns
SDIx High to SDOx High (Chain Mode with Busy Indicator)
tDSDOSDI
15
ns
Figure 2. Load Circuit for Digital Interface Timing
Figure 3. Voltage Levels for Timing
500µA
IOL
500µA
IOH
1.4V
TO SDOx
CL
20pF
X% VIOx1
Y% VIOx1
VIH2
VIL2
VIL2
VIH2
tDELAY
tDELAY
1
FOR VIOx ≤ 3.0V, X = 90 AND Y = 10; FOR VIOx > 3.0V, X = 70 AND Y = 30.
2 MINIMUM VIH AND MAXIMUM VIL USED. SEE SPECIFICATIONS FOR DIGITAL
INPUTS PARAMETER IN TABLE 3.


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