ADS7808 Burr-Brown Corporation, ADS7808 Datasheet - Page 5

• Manufacturer Part Number: ADS7808
• Description: 12-Bit 10ms Serial CMOS Sampling ANALOG-to-DIGITAL CONVERTER
• Manufacturer: Burr-Brown Corporation

TABLE II. Conversion and Data Timing T
FIGURE 2. Serial Data Timing Using Internal Clock. (CS, EXT/INT and TAG Tied LOW.)
DATACLK
SYMBOL
t
6
SDATA
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
+ t
t
t
BUSY
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
R/C
7
R/C LOW to DATACLK Delay
Data Available after CS LOW
+85 C.
External DATACLK Period
External DATACLK HIGH
External DATACLK LOW
CS to Rising Edge Delay
Data Valid to DATACLK
DATACLK LOW Delay
t
2
Convert Pulse Width
End of Conversion
SYNC Delay After
BUSY Delay after
DATACLK Period
Throughput Time
Conversion Time
Data Valid Delay
Acquisition Time
DATACLK HIGH
DATACLK HIGH
Data Valid after
DESCRIPTION
Aperture Delay
BUSY Delay
BUSY LOW
HIGH Delay
Setup Time
Setup Time
R/C to CS
t
8
t
10
MSB Valid
1
MIN
100
100
4.5
40
20
20
30
20
10
15
25
25
t
9
TYP MAX UNITS
220
450
440
125
5.7
40
75
9
A
Bit 10 Valid
= –40 C to
t
t
12
4500
11
2
65
10
35
55
8
8
2
+ 5
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
s
s
t
3
Bit 9 Valid
3
5
FIGURE 1. Basic Conversion Timing.
CS, R/C
MODE Acquire
BUSY
t
2
Bit 1 Valid
t
1
t
5
11
Convert
t
6
LSB Valid
ADS7808
12
t
3
Acquire
t
7
t
4
®