SYMBOL
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
6
+ t
7
t
8
t
9
t
10
t
11
t
12
t
13
t
14
t
15
t
16
t
17
t
18
t
19
t
20
DESCRIPTION
Convert Pulse Width
BUSY Delay
BUSY LOW
BUSY Delay After End of Conversion
Aperture Delay
Conversion Time
Acquisition Time
Throughput Time
R/C LOW to DATACLK Delay
DATACLK Period
Data Valid to DATACLK HIGH Delay
Data Valid After DATACLK LOW Delay
External DATACLK
External DATACLK HIGH
External DATACLK LOW
DATACLK HIGH Setup Time
R/C to CS Setup Time
SYNC Delay After DATACLK HIGH
Data Valid Delay
CS to Rising Edge Delay
Data Available after CS LOW
MIN
40
TYP
MAX
6000
65
8
UNITS
ns
ns
µs
ns
ns
µs
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
220
40
7.6
9
450
440
75
125
8
2
10
20
100
100
20
30
20
10
15
25
25
6
t
12
+ 5
35
55
TABLE II. Conversion and Data Timing. T
A
= –40°C to +85°C.
t
8
R/C
t
1
DATACLK
1
t
9
2
t
11
3
15
16
t
10
SDATA
t
2
t
3
BUSY
MSB Valid
Bit 14 Valid
Bit 13 Valid
Bit 1 Valid
LSB Valid
FIGURE 2. Serial Data Timing Using Internal Clock. (CS , EXT/INT and TAG Tied LOW.)
6
ADS7809
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SBAS017C
TI [ TEXAS INSTRUMENTS ]
