Datasheet

ADS1210, ADS1211
5
SBAS034B
www.ti.com
PGA
+2.5V
Reference
+3.3V Bias
Generator
Clock Generator
Serial Interface
Second-Order
∆∑
Modulator
Third-Order
Digital Filter
Modulator Control
14
12
13
15
16
AGND AV
DD
REF
OUT
REF
IN
V
BIAS
X
IN
X
OUT
6 19 20 21 7 10 11
98 1718
DSYNC CS DRDYMODE
SCLK
DGND
DV
DD
SDIO
SDOUT
4
5
2
3
24
1
22
23
MUX
A
IN
1P
A
IN
1N
A
IN
2P
A
IN
2N
A
IN
3P
A
IN
3N
A
IN
4P
A
IN
4N
Instruction Register
Command Register
Data Output Register
Offset Register
Full-Scale Register
Micro Controller
ADS1211 SIMPLIFIED BLOCK DIAGRAM
ADS1211P AND ADS1211U PIN DEFINITIONS
TOP VIEW DIP/SOIC
ADS1211P AND ADS1211U PIN CONFIGURATION
PIN NO NAME DESCRIPTION
1A
IN
3N Inverting Input Channel 3.
2A
IN
2P Noninverting Input Channel 2.
3A
IN
2N Inverting Input Channel 2.
4A
IN
1P Noninverting Input Channel 1.
5A
IN
1N Inverting Input Channel 1.
6 AGND Analog Ground.
7V
BIAS
Bias Voltage Output, +3.3V nominal.
8 CS Chip Select Input.
9 DSYNC Control Input to Synchronize Serial Output Data.
10 X
IN
System Clock Input.
11 X
OUT
System Clock Output (for Crystal or Resonator).
12 DGND Digital Ground.
13 DV
DD
Digital Supply, +5V nominal.
14 SCLK Clock Input/Output for serial data transfer.
15 SDIO Serial Data Input (can also function as Serial Data
Output).
16 SDOUT Serial Data Output.
17 DRDY Data Ready.
18 MODE SCLK Control Input (Master = 1, Slave = 0).
19 AV
DD
Analog Supply, +5V nominal.
20 REF
OUT
Reference Output: +2.5V nominal.
21 REF
IN
Reference Input.
22 A
IN
4P Noninverting Input Channel 4.
23 A
IN
4N Inverting Input Channel 4.
24 A
IN
3P Noninverting Input Channel 3.
ADS1211P
ADS1211U
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
A
IN
3N
A
IN
2P
A
IN
2N
A
IN
1P
A
IN
1N
AGND
V
BIAS
CS
DSYNC
X
IN
X
OUT
DGND
A
IN
3P
A
IN
4N
A
IN
4P
REF
IN
REF
OUT
AV
DD
MODE
DRDY
SDOUT
SDIO
SCLK
DV
DD