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SP8480 Datasheet(PDF) 4 Page - Sipex Corporation

Part No. SP8480
Description  Monolithic, 12-Bit Data Acquisition System
Download  12 Pages
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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 4 page
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292
PIN FUNCTION…
A
0 — Device Address — Logic low enables 8
MSB read; logic high enables 4 LSB read
STATUS — Identifies valid data output; goes to
logic high during conversion; goes to logic low
when conversion is completed and data is valid
R/C — Read/Convert — Initiates conversion on
the high-to-low transition; logic low disconnects
data bus; logic high initiates read
CE — Chip Enable — Logic low disables read
or convert; logic high enables read or convert
MA
0, MA1, MA2 — MUX Address 0, 1 & 2 —
Selects analog input channels CH
0 through CH7
DB
0 through DB11 — Data Outputs — Logic
high is binary true; logic low binary false
1
16
234567
8
9 10 11 12 13 14
15
17
23 22 21 20 19 18
24
28 27 26 25
12-BIT ADC
8-CHANNEL
MULTIPLEXER
DECODE
REF
MULTIPLEXER TRUTH TABLE
MA
2
MA
1
MA
0
OPERATION
00
0
CH
O Selected
00
1
CH
1 Selected
01
0
CH
2 Selected
01
1
CH
3 Selected
10
0
CH
4 Selected
10
1
CH
5 Selected
11
0
CH
6 Selected
11
1
CH
7 Selected
CONTROL TRUTH TABLE
A
O
R/C
OPERATION
X
H ->L
Start Conversion
0
1
Enable 8 MSBs
1
1
Enable 4 LSBs




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