ADS-941 CANDD [C&D Technologies], ADS-941 Datasheet - Page 4

• Manufacturer Part Number: ADS-941
• Description: 14-Bit, 1MHz Sampling A/D Converters
• Manufacturer: CANDD [C&D Technologies]

ADS-941
Removing System Errors
Use external potentiometers to remove system errors or to
reduce the small initial errors to zero. Use a 100
series with the analog input for gain adjustment. Use a fixed
50
resistor instead of the trimpot for operation without
INTERNAL S/H
+15V
–15V
0 to +10V
+5V
CONVERT
OUTPUT
4.7µF
4.7µF
START
4.7µF
DATA
0.1µF
EOC
GAIN ADJUST
0.1µF
0.1µF
0.1µF
DATA N-1 VALID
Scale is approximately 50ns per division.
4.7µF
100
N
Figure 3. ADS-941 Connection Diagram
Figure 2. ADS-941 Timing Diagram
10ns typ.
6, 14, 15
10
12
13
3
11
4 SIGNAL GROUND
50ns min., 100ns max
1
trimpot in
ANALOG INPUT
DIGITAL
GROUND
+10V
REF. OUT
Conversion Time
Hold
35ns max.
600ns typ.
ANALOG
GROUND
INVALID DATA
400ns max.
+5V
ZERO/OFFSET
4
ADJUST
OFFSET
ADJUST
ADS-941
adjustment. Use a 20k
ADJUST (pin 5) for zero/offset adjustment. Connect pin 5 to
ANALOG GROUND (pin 6) for operation without zero/offset
adjustment.
20k
5
START CONVERT
–5V
Aquisition Time
CODING SELECT
350ns max.
30ns max.
BIPOLAR
ENABLE
DATA N VALID
600ns min.
N+1
32
8
9
2
trimpot with the wiper tied to OFFSET
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
7
BIT 1 (MSB)
BIT 1 (MSB)
BIT2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12
BIT 13
BIT 14 (LSB)
OVERFLOW
EOC
®
®