AD7729 Analog Devices, AD7729 Datasheet - Page 5
AD7729
Manufacturer Part Number
AD7729
Description
3 V, Dual Sigma-Delta ADC with Auxiliary DAC
Manufacturer
Analog Devices
Datasheet
1.AD7729.pdf
(16 pages)
Specifications of AD7729
Resolution (bits)
15bit
# Chan
2
Sample Rate
13MSPS
Interface
Ser
Analog Input Type
Diff-Uni,SE-Uni
Ain Range
(2Vref) p-p
Adc Architecture
Sigma-Delta
Pkg Type
SOIC,SOP
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REV. 0
TIMING DIAGRAMS
ASDOFS (O)
BSDOFS (O)
Figure 3. Load Circuit for Timing Specifications
ASCLK (O)
ASDIFS (I)
BSCLK (O)
ASDO (O)
BSDIFS (I)
BSDO (O)
ASDI (I)
BSDI (I)
ASE (I)
BSE (I)
NOTE
I = INPUT, O = OUTPUT
TO OUTPUT PIN
THREE-STATE
THREE-STATE
THREE-STATE
THREE-STATE
THREE-STATE
THREE-STATE
NOTE
I = INPUT, O = OUTPUT
Figure 2. Clock Timing
t
3
15pF
C
L
t
10
t
100 A
100 A
18
t
t
1
t
12
t
t
20
11
19
I
I
OL
OH
t
2
D9
D9
Figure 7. Baseband Serial Port BSPORT
+2.1V
Figure 6. Auxiliary Serial Port ASPORT
t
t
15
23
t
t
10
18
t
D8
13
D8
t
D9
21
t
D9
11
t
19
t
t
14
22
–5–
A1
A1
A2
A2
t
16
t
24
*BSCLK
*ASCLK
*ASCLK IS INDIVIDUALLY PROGRAMMABLE IN FREQUENCY
*BSCLK IS INDIVIDUALLY PROGRAMMABLE IN FREQUENCY
(MCLK/4 SHOWN HERE).
(MCLK/4 SHOWN HERE).
A0
MCLK
MCLK
A0
A1
A1
t
t
25
17
A0
A0
Figure 4. ASCLK
t
Figure 5. BSCLK
t
1
1
t
t
9
6
t
t
t
t
4
3
7
3
D9
D9
t
t
8
5
D8
D8
t
t
2
2
AD7729
D9
D9
D7
D7
D8
D8