MAX1452_09 Datasheet, PDF (22/25 Pages) Maxim Integrated Products – Low-Cost Precision Sensor Signal Conditioner

Low-Cost Precision Sensor
Signal Conditioner
Table 15. ALOC Definition
ALOC[3:0]
ANALOG SIGNAL
0000
OUT
0001
BDR
0010
ISRC
0011
VDD
0100
VSS
0101
BIAS5U
0110
AGND
0111
FSODAC
1000
FSOTCDAC
1001
ODAC
1010
OTCDAC
1011
VREF
1100
VPTATP
1101
VPTATM
1110
INP
1111
INM
DESCRIPTION
PGA Output
Bridge Drive
Bridge Drive Current Setting
Internal Positive Supply
Internal Ground
Internal Test Node
Internal Analog Ground. Approximately half of VDD.
Full Scale Output DAC
Full Scale Output TC DAC
Offset DAC
Offset TC DAC
Bandgap Reference Voltage (nominally 1.25V)
Internal Test Node
Internal Test Node
Sensor’s Positive Input
Sensor’s Negative Input
Table 16. Effects of Compensation
TYPICAL UNCOMPENSATED INPUT (SENSOR)
Offset…………………..…….…………………………..±100%FSO
FSO…………………………….………………………..4 to 60mV/V
Offset TC…………………………………………………...20% FSO
Offset TC Nonlinearity…..………………………………….4% FSO
FSOTC…………………………..………………………..-20% FSO
FSOTC Nonlinearity…..……..…………………………….5% FSO
Temperature Range..….….……………………..-40°C to +125°C
TYPICAL COMPENSATED TRANSDUCER OUTPUT
OUT..…….……………………………..Ratiometric to VDD at 5.0V
Offset at +25°C……………………………………0.500V ± 200μV
FSO at +25°C……………………………………...4.000V ± 200μV
Offset accuracy over temp. range….………±4mV (±0.1% FSO)
FSO accuracy over temp. range……………±4mV (±0.1% FSO)
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