AD7729 Analog Devices, AD7729 Datasheet - Page 5

• Manufacturer Part Number: AD7729
• Description: 3 V, Dual Sigma-Delta ADC with Auxiliary DAC
• Manufacturer: Analog Devices

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

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