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參數資料
| 型號： | MAX1457AWI+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | 0.1% Accurate Signal Conditioner for Piezoresistive Sensor Compensation |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | SOP-28 |
| 文件頁數： | 3/12頁 |
| 文件大?。?/td> | 93K |
| 代理商： | MAX1457AWI+ |
______________________________________________________________________________________
11
MAX1457
0.1%-Accurate Signal Conditioner
for Piezoresistive Sensor Compensation
V
OUT
(mV)
V
OUT
(V)
PRESSURE (kPa)
UNCOMPENSATED RAW SENSOR OUTPUT
0
40
80
120
160
0
40
20
60
80
100
PRESSURE (kPa)
0
40
20
60
80
100
COMPENSATED TRANSDUCER
0
1
2
3
4
5
ERROR
(%
FSO)
ERROR
(%
FSO)
TEMPERATURE (°C)
UNCOMPENSATED SENSOR TEMPERATURE ERROR
-20
-10
10
0
20
30
-50
50
FSO
0
100
150
-50
50
0
100
150
TEMPERATURE (°C)
COMPENSATED TRANSDUCER ERROR
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
OFFSET
TA = +25°C
17mV
≤ VOUT ≤ 73mV
TA = +25°C
0.5V
≤ VOUT ≤ 4.5V
OFFSET
Figure 8. Comparison of an Uncompensated Sensor (left) and a Compensated Transducer (right)
Typical Uncompensated Input (Sensor)
Offset . . . . . . . . . . . . . . . . . . . . . . . . . .±100% FSO
FSO . . . . . . . . . . . . . . . . . . . . . .20mV/V to 30mV/V
Offset TC . . . . . . . . . . . . . . . . . . . . . . . . .20% FSO
Offset TC Nonlinearity . . . . . . . . . . . . . . . .4% FSO
FSO TC . . . . . . . . . . . . . . . . . . . . . . . . . .-20% FSO
FSO TC Nonlinearity . . . . . . . . . . . . . . . . . .5% FSO
Typical Compensated Transducer Output
Temperature Range . . . . . . . . . . .-40°C to +125°C
VOUT . . . . . . . . . . . . . . . .ratiometric to VDD at 5.0V
Offset at +25°C . . . . . . . . . . . . . . .0.500V ± 200V
FSO at +25°C . . . . . . . . . . . . . . . . .4.000V ±200V
Offset Accuracy Over
Temperature Range . . . . . . . . . .±4mV (0.1% FSO)
FSO Accuracy Over
Temperature Range . . . . . . . . ..±4mV (0.1% FSO)
Table 1. MAX1457 Sensor Calibration and Compensation
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