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參數(shù)資料
| 型號(hào)： | MAX1455EVKIT-NS |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL KIT FOR MAX1455 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 接口，傳感器信號(hào)調(diào)節(jié)器 |
| 已用 IC / 零件： | MAX1455 |
| 已供物品： | 板 |
Set Reference Temperature (e.g., 25°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.
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.
Set Next Test Temperature:
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.
MAX1455
Low-Cost Automotive Sensor Signal
Conditioner
______________________________________________________________________________________
21
MAX1455
VOUT
VDD
MODULE 1
DATA
VSS
VDD
VSS
TEST OVEN
MAX1455
VOUT
MODULE 2
VOUT
DIGITAL
MULTIPLEXER
+5V
DIO[1:N]
DIO1
DIO2
DION
MAX1455
VOUT
MODULE N
DVM
Figure 7. Automated Test System Concept
Table 16. Effects of Compensation
TYPICAL UNCOMPENSATED INPUT (SENSOR)
TYPICAL COMPENSATED TRANSDUCER OUTPUT
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
OUT..…….………………………………Ratiometric to VDD at 5.0V
Offset at +25
°C……………………………………0.500V ± 200V
FSO at +25
°C……………………………………...4.000V ± 200V
Offset Accuracy over Temp. Range….……..
±4mV (±0.1% FSO)
FSO Accuracy over Temp. Range…………..
±4mV (±0.1% FSO)
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