Datasheet
ADS1240, 1241
15
SBAS173F
www.ti.com
DETAILED REGISTER DEFINITIONS
SETUP (Address 00
H
) Setup Register
Reset Value = iiii0000
bit 7-4 Factory Programmed Bits
bit 3 BOCS: Burnout Current Source
0 = Disabled (default)
1 = Enabled
bit 2-0 PGA2: PGA1: PGA0: Programmable Gain Amplifier
Gain Selection
000 = 1 (default)
001 = 2
010 = 4
011 = 8
100 = 16
101 = 32
110 = 64
111 = 128
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
ID ID ID ID BOCS PGA2 PGA1 PGA0
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
PSEL3 PSEL2 PSEL1 PSEL0 NSEL3 NSEL2 NSEL1 NSEL0
ADDRESS REGISTER BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
00
H
SETUP ID ID ID ID BOCS PGA2 PGA1 PGA0
01
H
MUX PSEL3 PSEL2 PSEL1 PSEL0 NSEL3 NSEL2 NSEL1 NSEL0
02
H
ACR DRDY U/B SPEED BUFEN BIT ORDER RANGE DR1 DR0
03
H
ODAC SIGN OSET6 OSET5 OSET4 OSET3 OSET2 OSET1 OSET0
04
H
DIO DIO_7 DIO_6 DIO_5 DIO_4 DIO_3 DIO_2 DIO_1 DIO_0
05
H
DIR DIR_7 DIR_6 DIR_5 DIR_4 DIR_3 DIR_2 DIR_1 DIR_0
06
H
IOCON IO7 IO6 IO5 IO4 IO3 IO2 IO1 IO0
07
H
OCR0 OCR07 OCR06 OCR05 OCR04 OCR03 OCR02 OCR01 OCR00
08
H
OCR1 OCR15 OCR14 OCR13 OCR12 OCR11 OCR10 OCR09 OCR08
09
H
OCR2 OCR23 OCR22 OCR21 OCR20 OCR19 OCR18 OCR17 OCR16
0A
H
FSR0 FSR07 FSR06 FSR05 FSR04 FSR03 FSR02 FSR01 FSR00
0B
H
FSR1 FSR15 FSR14 FSR13 FSR12 FSR11 FSR10 FSR09 FSR08
0C
H
FSR2 FSR23 FSR22 FSR21 FSR20 FSR19 FSR18 FSR17 FSR16
0D
H
DOR2 DOR23 DOR22 DOR21 DOR20 DOR19 DOR18 DOR17 DOR16
0E
H
DOR1 DOR15 DOR14 DOR13 DOR12 DOR11 DOR10 DOR09 DOR08
0F
H
DOR0 DOR07 DOR16 FSR21 DOR04 DOR03 DOR02 DOR01 DOR00
TABLE III. Registers.
ADS1240 AND ADS1241
REGISTER
The operation of the device is set up through individual
registers. Collectively, the registers contain all the informa-
tion needed to configure the part, such as data format,
multiplexer settings, calibration settings, data rate, etc. The
set of the 16 registers are shown in Table III.
MUX (Address 01
H
) Multiplexer Control Register
Reset Value = 01
H
bit 7-4 PSEL3: PSEL2: PSEL1: PSEL0: Positive Channel
Select
0000 = A
IN
0 (default)
0001 = A
IN
1
0010 = A
IN
2
0011 = A
IN
3
0100 = A
IN
4
0101 = A
IN
5
0110 = A
IN
6
0111 = A
IN
7
1xxx = AINCOM (except when xxx = 111)
1111 = Reserved
bit 3-0 NSEL3: NSEL2: NSEL1: NSEL0: Negative Channel
Select
0000 = A
IN
0
0001 = A
IN
1 (default)
0010 = A
IN
2
0011 = A
IN
3
0100 = A
IN
4
0101 = A
IN
5
0110 = A
IN
6
0111 = A
IN
7
1xxx = AINCOM (except when xxx = 111)
1111 = Reserved