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AD7993 Datenblatt(PDF) 20 Page - Analog Devices

Teilenummer AD7993
Bauteilbeschribung  4-Channel, 12-/10-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP
PDF  27 Pages
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7993 Datenblatt(HTML) 20 Page - Analog Devices

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AD7994/AD7993
–20–
REV. PrF
PRELIMINARYTECHNICAL DATA
CYCLE TIMER REGISTER
The Cycle Timer Register is a 8-bit read/write register,
which stores the conversion interval value for the Auto-
matic Cycle mode of the AD7994/AD7993, see Modes of
Operation section. The five MSBs of the Cycle Timer
Register are unused and should contain 0’s at all times.
On power up, the Cycle Timer Register will contain all
0s, thus disabling the Automatic Cycle operation of the
AD7994/AD7993. To enable the Automatic Cycle Mode
the user must write to the Cycle Timer Register, selecting
the required conversion interval. Table XIIa shows the
structure of the Cycle Timer register while Table XIIb
shows how the bits in this register are decoded to provide
various automatic sampling intervals.
Table XIIa.
Cycle Timer Register
* Default settings on Power-up
Table XIIb.
Cycle Timer Intervals
D2 D1 D0
Conversion Interval (typ)
0
0
0
Mode not selected
0
0
1
TCONVERT x 32
0
1
0
TCONVERT x 64
0
1
1
TCONVERT x 128
1
0
0
TCONVERT x 256
1
0
1
TCONVERT x 512
1
1
0
TCONVERT x 1024
1
1
1
TCONVERT x 2048
TCONVERT is equivalent to the conversion time of the
ADC.
D7
D6
D5
D4
D3
D2
D1
D0
Sample Bit Trial 0
0
0
Cyc
Cyc
Cyc
Dealy
Delay
Bit2
Bit1
Bit0
0*
0*
0*
0*
0*
0*
0*
0*



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