MAX1452
Low-Cost Precision Sensor
Signal Conditioner
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Table 15. ALOC Definition
ALOC[3:0] ANALOG SIGNAL DESCRIPTION
0000 OUT PGA Output
0001 BDR Bridge Drive
0010 ISRC Bridge Drive Current Setting
0011 VDD Internal Positive Supply
0100 VSS Internal Ground
0101 BIAS5U Internal Test Node
0110 AGND Internal Analog Ground. Approximately half of VDD.
0111 FSODAC Full Scale Output DAC
1000 FSOTCDAC Full Scale Output TC DAC
1001 ODAC Offset DAC
1010 OTCDAC Offset TC DAC
1011 VREF Bandgap Reference Voltage (nominally 1.25V)
1100 VPTATP Internal Test Node
1101 VPTATM Internal Test Node
1110 INP Sensor’s Positive Input
1111 INM Sensor’s Negative Input
Table 16. Effects of Compensation
TYPICAL UNCOMPENSATED INPUT (SENSOR) TYPICAL COMPENSATED TRANSDUCER OUTPUT
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
OUT..…….……………………………..Rati om etr i c to V D D 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)
