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ADE7978 Datasheet(PDF) 12 Page - Analog Devices

No. de pieza ADE7978
Descripción Electrónicos  Isolated Energy Metering Chipset for Polyphase Shunt Meters
PDF  125 Pages
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
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ADE7978 Datasheet(HTML) 12 Page - Analog Devices

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ADE7978/ADE7933/ADE7932/ADE7923
Data Sheet
Rev. D | Page 12 of 125
SPI Interface Timing Parameters
VDD = 3.3 V ± 10%, GND = DGND = 0 V, XTALIN = 16.384 MHz, TMIN to TMAX = −40°C to +85°C.
Table 4.
Parameter
Symbol
Min
Max
Unit
SS to SCLK Edge
t
SS
50
ns
SCLK Period
0.4
40001
µs
SCLK Low Pulse Width
t
SL
175
ns
SCLK High Pulse Width
t
SH
175
ns
Data Output Valid After SCLK Edge
t
DAV
130
ns
Data Input Setup Time Before SCLK Edge
t
DSU
100
ns
Data Input Hold Time After SCLK Edge
t
DHD
50
ns
Data Output Fall Time
t
DF
20
ns
Data Output Rise Time
t
DR
20
ns
SCLK Rise Time
t
SR
20
ns
SCLK Fall Time
t
SF
20
ns
MISO Disable After SS Rising Edge
t
DIS
1
µs
SS High After SCLK Edge
t
SFS
100
ns
1 Guaranteed by design.
MSB
LSB
LSB IN
INTERMEDIATE BITS
INTERMEDIATE BITS
tSFS
tDIS
tSS
tSL
tDF
tSH
tDHD
tDAV
tDSU
tSR
tSF
tDR
MSB IN
MOSI
MISO
SCLK
SS
Figure 7. SPI Interface Timing



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