MAX1455AAE-T Maxim Integrated Products, MAX1455AAE-T Datasheet - Page 21

• Manufacturer Part Number: MAX1455AAE-T
• Description: Board Mount Temperature Sensors Automotive Sensor Signal Conditioner
• Manufacturer: Maxim Integrated Products

Specifications of MAX1455AAE-T

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Set Reference Temperature (e.g., 25°C):
•
•
Figure 7. Automated Test System Concept
Table 16. Effects of Compensation
Offset…………………..…….………………………….±100% FSO
FSO…………………………….………………....1mV/V to 40mV/V
Offset TC…………………………………………………...20% FSO
Offset TC Nonlinearity…..………………………………….4% FSO
FSOTC…………………………..………………………..-20% FSO
FSOTC Nonlinearity…..……..…………………………….5% FSO
Temperature Range..….….……………………..-40°C to +125°C
Initialize each transducer by loading its respective
register with default coefficients (e.g., based on
mean values of offset, FSO, and bridge resistance)
to prevent overload of the MAX1455. The internal
calibration registers are addressed in ICRA[3:0]
and decoded as shown in Table 15.
Set the initial bridge voltage (with the FSODAC) to
half of the supply voltage. Measure the bridge volt-
age using the BDR or OUT pins, or calculate based
on measurements.
MULTIPLEXER
TYPICAL UNCOMPENSATED INPUT (SENSOR)
DIGITAL
______________________________________________________________________________________
DVM
DIO[1:N]
Low-Cost Automotive Sensor Signal
+5V
V
OUT
MODULE 1
V
DD
DATA
V
OUT
DIO1
V
SS
OUT..…….………………………………Rati om etr i c to V
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)
•
•
Set Next Test Temperature:
•
•
•
MODULE 2
TYPICAL COMPENSATED TRANSDUCER OUTPUT
Calibrate the output offset and FSO of the transduc-
er using the ODAC and FSODAC, respectively.
Store calibration data in the test computer or
MAX1455 EEPROM user memory.
Calibrate offset and FSO using the ODAC and
FSODAC, respectively.
Store calibration data in the test computer or
MAX1455 EEPROM user memory.
Calculate the correction coefficients.
V
DD
DATA
V
OUT
DIO2
V
SS
Conditioner
MODULE N
V
DD
TEST OVEN
V
OUT
DION
V
SS
DD
at 5.0V
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