®
®
ADS-118/118A
14
À
+5V
+
4.7µF
0.1µF
13, 21
5V
4.7µF
0.1µF
20
ADS-118
ADS-118A
18, 23
ANALOG
INPUT
START
CONVERT
19
16
12 BIT 1 (MSB)
11 BIT 2
10 BIT 3
9 BIT 4
8 BIT 5
7 BIT 6
6 BIT 7
5 BIT 8
4 BIT 9
3 BIT 10
2 BIT 11
1 BIT 12 (LSB)
15 EOC
17 ENABLE (1-12)
or OFFSET ADJUST
À
A single +5V supply should be used for both the +5V analog and +5V digital.
If separate supplies are used, the difference between the two cannot exceed 100mV.
+
Figure 3. Typical Connection Diagram
N
START
CONVERT
100ns typ.
N+1
10ns typ.
INTERNAL S/H
Hold
Acquisition Time
85ns typ.
90ns max.
35ns min., 40ns typ., 50ns max.
30ns, ±5ns
EOC
Conversion Time
140ns typ., 150ns max.
20ns typ.
OUTPUT
DATA
DATA N-1 VALID
130ns min.
150ns typ.
INVALID DATA
50ns typ.
70ns max.
DATA N VALID
INVALID DATA
Note: Scale is approximately 10ns per division.
Figure 4. ADS-118/118A Timing Diagram
5
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
