Datasheet

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