AD7924 Analog Devices, AD7924 Datasheet - Page 26

• Manufacturer Part Number: AD7924
• Description: 4-Channel, 1 MSPS, 12-Bit A/D Converter with Sequencer in 16-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7924

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: SOP

AD7904/AD7914/AD7924
DOUT
DOUT
DOUT
SCLK
SCLK
SCLK
DIN
DIN
DIN
CS
CS
CS
THREE-
STATE
THREE-
STATE
THREE-
STATE
t
t
t
t
t
t
2
3
2
3
2
3
ZERO
ZERO
ZERO
WRITE
WRITE
WRITE
1
1
1
ZERO
ZERO
ZERO
t
t
t
SEQ1
SEQ1
SEQ1
9
9
9
2
2
2
2 IDENTIFICATION
2 IDENTIFICATION
2 IDENTIFICATION
ADD1
ADD1
ADD1
DONTC
DONTC
DONTC
BITS
BITS
BITS
3
3
3
ADD0
ADD0
ADD0
t
t
t
4
4
4
DONTC
DONTC
DONTC
4
4
4
Figure 27. AD7904 Serial Interface Timing Diagram
Figure 28. AD7914 Serial Interface Timing Diagram
Figure 29. AD7924 Serial Interface Timing Diagram
DB11
DB7
DB9
t
ADD1
t
ADD1
t
ADD1
6
6
6
5
5
5
t
t
t
7
7
7
DB10
DB6
DB8
t
t
t
CONVERT
CONVERT
CONVERT
ADD0
ADD0
ADD0
Rev. B | Page 26 of 32
t
t
t
10
10
10
6
6
6
11
11
11
DB0
DB2
DB4
CODING
CODING
CODING
12
12
12
ZERO
DB1
DB3
DONTC
DONTC
DONTC
13
13
13
4 TRAILING ZEROS
ZERO
DB0
DB2
DONTC
DONTC
DONTC
B
B
B
14
14
14
t
t
t
2 TRAILING ZEROS
5
5
5
ZERO
ZERO
DB1
DONTC
DONTC
DONTC
15
15
15
t
t
t
8
ZERO
8
ZERO
8
DB0
DONTC
DONTC
DONTC
16
16
16
t
t
t
THREE-
STATE
THREE-
STATE
THREE-
STATE
11
11
11
t
t
t
QUIET
QUIET
QUIET