hi7191 Intersil Corporation, hi7191 Datasheet - Page 22

• Manufacturer Part Number: hi7191
• Description: 24-bit, High Precision, Sigma Delta A/d Converter
• Manufacturer: Intersil Corporation

Offset Calibration Register
The Offset Calibration Register is a 24-bit register containing
the offset correction factor. This register is indeterminate on
power-up but will contain a Self Calibration correction value
after a RESET has been applied.
The Offset Calibration Register holds the value that corrects
the filter output data to all 0’s when the analog input is 0V.
Positive Full Scale Calibration Register
The Positive Full Scale Calibration Register is a 24-bit
register containing the Positive Full Scale correction
coefficient. This coefficient is used to determine the positive
gain slope factor. This register is indeterminate on power-up
but will contain a Self Calibration correction coefficient after
a RESET has been applied.
MSB
MSB
O23
O15
P23
O7
15
7
O22
O14
P22
O6
22
14
22
6
O21
O13
P21
O5
21
13
21
5
O20
O12
P20
O4
20
12
20
4
BYTE 2
BYTE 1
BYTE 0
BYTE 2
22
O19
O11
P19
O3
19
11
19
3
O18
O10
P18
O2
18
10
18
2
O17
P17
O1
O9
17
17
9
1
O16
LSB
P16
O8
O0
16
16
8
HI7191
Negative Full Scale Calibration Register
The Negative Full Scale Calibration Register is a 24-bit
register containing the Negative Full Scale correction
coefficient. This coefficient is used to determine the negative
gain slope factor. This register is indeterminate on power-up
but will contain a Self Calibration correction coefficient after
a RESET has been applied.
MSB
P15
N23
N15
P7
N7
15
15
7
7
P14
N22
N14
N6
P6
14
22
14
6
6
N21
N13
P13
N5
13
P5
21
13
5
5
P12
N20
N12
P4
N4
12
20
12
4
4
BYTE 1
BYTE 0
BYTE 2
BYTE 1
BYTE 0
P11
N19
N11
N3
P3
19
11
11
3
3
N18
N10
P10
P2
N2
10
18
10
2
2
N17
P9
P1
N9
N1
17
9
1
9
1
June 1, 2006
FN4138.8
LSB
LSB
N16
N8
N0
P8
P0
16
8
8