ADS-118/118A

®

®

5

Note: Scale is approximately 10ns per division.

OUTPUT

DATA

DATA N-1 VALID

DATA N VALID

20ns typ.

INVALID DATA

130ns min.

150ns typ.

START

CONVERT

INTERNAL S/H

N

N+1

100ns typ.

35ns min., 40ns typ., 50ns max.

Acquisition Time

85ns typ.

90ns max.

10ns typ.

EOC

30ns, ±5ns

Conversion Time

140ns typ., 150ns max.

Hold

INVALID DATA

50ns typ.

70ns max.

ADS-118

ADS-118A

19

16

12

11

10

9

8

7

6

5

4

3

2

1

15

17

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

ANALOG

INPUT

START

CONVERT

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.

Œ

0.1µF

0.1µF

4.7µF

4.7µF

13, 21

20

18, 23

–5V

+5V

14

Œ

Figure 3. Typical Connection Diagram

Figure 4. ADS-118/118A Timing Diagram