Datasheet
ADS1240, 1241
5
SBAS173F
www.ti.com
PIN CONFIGURATION (ADS1240)
PIN
NUMBER NAME DESCRIPTION
1DV
DD
Digital Power Supply
2 DGND Digital Ground
3X
IN
Clock Input
4X
OUT
Clock Output, used with external crystals.
5 RESET Active LOW, resets the entire device.
6 DSYNC Active LOW, Synchronization Control
7 PDWN Active LOW, Power Down. The power down func-
tion shuts down the analog and digital circuits.
8 DGND Digital Ground
9V
REF+
Positive Differential Reference Input
10 V
REF–
Negative Differential Reference Input
11 A
IN
0/D0 Analog Input 0 / Data I/O 0
12 A
IN
1/D1 Analog Input 1 / Data I/O 1
13 A
IN
2/D2 Analog Input 2 / Data I/O 2
14 A
IN
3/D3 Analog Input 3 / Data I/O 3
15 A
INCOM
Analog Input Common, connect to AGND if unused.
16 AGND Analog Ground
17 AV
DD
Analog Power Supply
18 POL Serial Clock Polarity
19 CS Active LOW, Chip Select
20 D
IN
Serial Data Input, Schmitt Trigger
21 D
OUT
Serial Data Output
22 SCLK Serial Clock, Schmitt Trigger
23 DRDY Active LOW, Data Ready
24 BUFEN Buffer Enable
PIN DESCRIPTIONS (ADS1240)
ADS1240
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
DV
DD
DGND
X
IN
X
OUT
RESET
DSYNC
PDWN
DGND
V
REF+
V
REF–
A
IN
0/D0
A
IN
1/D1
BUFEN
DRDY
SCLK
D
OUT
D
IN
CS
POL
AV
DD
AGND
A
INCOM
A
IN
3/D3
A
IN
2/D2
PIN CONFIGURATION (ADS1241)
ADS1241
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DV
DD
DGND
X
IN
X
OUT
RESET
DSYNC
PDWN
DGND
V
REF+
V
REF–
A
IN
0/D0
A
IN
1/D1
A
IN
4/D4
A
IN
5/D5
BUFEN
DRDY
SCLK
D
OUT
D
IN
CS
POL
AV
DD
AGND
A
INCOM
A
IN
3/D3
A
IN
2/D2
A
IN
7/D7
A
IN
6/D6
PIN
NUMBER NAME DESCRIPTION
1DV
DD
Digital Power Supply
2 DGND Digital Ground
3X
IN
Clock Input
4X
OUT
Clock Output, used with external crystals.
5 RESET Active LOW, resets the entire device.
6 DSYNC Active LOW, Synchronization Control
7 PDWN Active LOW, Power Down. The power down func-
tion shuts down the analog and digital circuits.
8 DGND Digital Ground
9V
REF+
Positive Differential Reference Input
10 V
REF–
Negative Differential Reference Input
11 A
IN
0/D0 Analog Input 0 / Data I/O 0
12 A
IN
1/D1 Analog Input 1 / Data I/O 1
13 A
IN
4/D4 Analog Input 4 / Data I/O 4
14 A
IN
5/D5 Analog Input 5 / Data I/O 5
15 A
IN
6/D6 Analog Input 6 / Data I/O 6
16 A
IN
7/D7 Analog Input 7 / Data I/O 7
17 A
IN
2/D2 Analog Input 2 / Data I/O 2
18 A
IN
3/D3 Analog Input 3 / Data I/O 3
19 A
INCOM
Analog Input Common, connect to AGND if unused.
20 AGND Analog Ground
21 AV
DD
Analog Power Supply
22 POL Serial Clock Polarity
23 CS Active LOW, Chip Select
24 D
IN
Serial Data Input, Schmitt Trigger
25 D
OUT
Serial Data Output
26 SCLK Serial Clock, Schmitt Trigger
27 DRDY Active LOW, Data Ready
28 BUFEN Buffer Enable
PIN DESCRIPTIONS (ADS1241)
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