ADS-118 Datel, Inc., ADS-118 Datasheet - Page 5

• Manufacturer Part Number: ADS-118
• Description: 5mhz, Low-power ADC: 12-bit
• Manufacturer: Datel, Inc.

®
INTERNAL S/H
CONVERT
OUTPUT
START
DATA
EOC
+5V
–5V
®
4.7µF
4.7µF
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.
CONVERT
ANALOG
START
DATA N-1 VALID
INPUT
100ns typ.
130ns min.
10ns typ.
150ns typ.
0.1µF
0.1µF
N
140ns typ., 150ns max.
30ns, ±5ns
Hold
Conversion Time
Figure 4. ADS-118/118A Timing Diagram
Figure 3. Typical Connection Diagram
14
20
18, 23
19
16
13, 21
INVALID DATA
ADS-118A
ADS-118
70ns max.
Acquisition Time
50ns typ.
90ns max.
85ns typ.
5
35ns min., 40ns typ., 50ns max.
Note: Scale is approximately 10ns per division.
20ns typ.
DATA N VALID
N+1
12
11
10
15
17
9
8
7
6
5
4
3
2
1
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
EOC
ENABLE (1-12)
or OFFSET ADJUST
INVALID DATA
ADS-118/118A