MAX1454_11 Datasheet, PDF (16/25 Pages) Maxim Integrated Products – Precision Sensor Signal Conditioner with Overvoltage Protection

MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
Table 7. Input-Referred Offset Setting (IRO Sign, IRO[3:0])
IRO SIGN IRO[3:0]
1
1111
1
1110
1
1101
1
1100
1
1011
1
1010
1
1001
1
1000
1
0111
1
0110
1
0101
1
0100
1
0011
1
0010
1
0001
1
0000
INPUT-
REFERRED
OFFSET
CORRECTION
AS % OF V_DDX
1.11
1.04
0.96
0.89
0.81
0.74
0.67
0.59
0.52
0.44
0.37
0.30
0.22
0.15
0.07
0
INPUT-REFERRED
OFFSET
CORRECTION
AT V_DDX = 5V DC
(mV)
55.5
51.8
48.1
44.4
40.7
37
33.3
29.6
25.9
22.2
18.5
14.8
11.1
7.4
3.7
0
IRO SIGN
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
IRO[3:0]
INPUT-REFERRED
OFFSET
CORRECTION
AS % OF V_DDX
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
0
-0.07
-0.15
-0.22
-0.30
-0.37
-0.44
-0.52
-0.59
-0.67
-0.74
-0.81
-0.89
-0.96
-1.04
-1.11
INPUT-REFERRED
OFFSET
CORRECTION
AT V_DDX = 5V DC
(mV)
0
-3.7
-7.4
-11.1
-14.8
-18.5
-22.2
-25.9
-29.6
-33.3
-37
-40.7
-44.4
-48.1
-51.8
-55.5
Table 8. Bridge Driver Current-Mirror
Ratio Setting (CMRATIO[1:0])
CMRATIO[1:0]
00
01
10
11
CURRENT-
MIRROR RATIO
6
12
18
30
BRIDGE
RESISTANCE (kI)
10
5
3.33
2
Table 9. DAC Refresh Rate
(REFRATE[1:0])
REFRATE[1:0]
00
01
10
11
UPDATE INTERVAL (ms)
4.096
16.384
65.536
131.072
Table 10. Wait Time for Read Requests (READDLY[1:0])*
READDLY[1:0]
RESPONSE DELAY IN BYTE TIMES (8-BIT TIME)
00
1 byte time (i.e., (1 x 8)/baud rate)
01
2 byte times
10
4 byte times
11
8 byte times
*The selected delay time is applied before and after the requested byte is read.
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