ADS-230 Datel, Inc., ADS-230 Datasheet - Page 7

• Manufacturer Part Number: ADS-230
• Description: Sampling A/D Converters
• Manufacturer: Datel, Inc.

Timing
BIT 1 - BIT 12
The ADS-230/-231 has two modes of operation as shown
In the Interrupt Interface mode, as shown in Figure 5, the
in Figure 5, 6, 7 and 8.
falling edge of S/H holds the input voltage and initiates a
conversion when CS is held low. At the end of conversion,
the EOC output goes high and the INT output goes low,
CS
S/H
RD
OE
INPUT
®
EOC
SEL
S/H
INT
CS
RD
Figure 7. CS Setup & Hold Timing for S/H, RD and OE
Figure 5. Interrupt Interface Timing (MD = 0, OE = 1)
DATA (N-1)
N
tAD
tEOC
N+1
t
CSS
tS/H
tCONV
tTHROUGHPUT
®
tINT
N+1
tACC
t
CSH
DATA (N)
tMS
tINTH
N+2
t1H.OH
tMH
N+2
7
IT 1 - BIT 12
S/H
CS
RD
OE
Figure 6. High-speed Interface Timing (MD = 0, OE = 1, CS = 0, RD = 0)
INPUT
The High Speed Interface mode is shown in Figure 6. In
The control logic decoding section is shown in Figure 8.
EOC
indicating that the conversion results are latched and may
be read by pulling RD low. The falling edge of RD resets
the INT line.
this mode the output data is always present, and the INT to
RD delay is eliminated.
SEL
S/H
N
INT FROM INTERNAL STATE MACHINE
tAD
tEOC
Figure 8. ADS Control Logic
DATA (N-1)
N+1
tS/H
tCONV
tTHROUGHPUT
ADS-230/231
ADS-230/ADS-231
N+1
tUPDATE
INTERNAL S/H
INTERNAL OUTPUT
ENABLE
tMS
N+2
DATA (N)
tMH
N+2
INT