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參數(shù)資料
| 型號： | MAX1457AWI+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調(diào)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(shù)： | 6/12頁 |
| 文件大?。?/td> | 93K |
| 代理商： | MAX1457AWI+ |
MAX1457
0.1%-Accurate Signal Conditioner
for Piezoresistive Sensor Compensation
_______________________________________________________________________________________
3
Note 1: Circuit of Figure 5 with current source turned off. This value is adjustable through a bias resistor and represents the IC cur-
rent consumption. This excludes the 93C66 EEPROM average current, which is approximately 13A at a refresh rate of 3Hz
(fCLK = 100kHz).
Note 2: Temperature errors for the entire range are compensated together with the sensor errors.
Note 3: The sensor and the MAX1457 must always be at the same temperature during calibration and use.
Note 4: This is the maximum allowable sensor offset at minimum gain (54V/V).
Note 5: This is the sensor’s sensitivity normalized to its drive voltage, assuming a desired full-span output of 4V and a bridge volt-
age of 2.5V. Lower sensitivities can be accommodated by using the auxiliary op amp. Higher sensitivities can be accommo-
dated by operating at lower bridge voltages.
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +5V, VSS = 0V, TA = +25°C, unless otherwise noted.)
VBR = 2.5V to 3.5V, fCLK = 100kHz
VOUT = (VSS + 0.25V) to (VDD - 0.25V)
(VIN - VOUT) at VIN = 2.5V,
RBIAS = 400k (no load)
5k
load to VSS or VDD
RBIAS = 400k, VIN = 2.5V (no load)
RBIAS = 400k, VIN = 2.5V,
VOUT = 2.5V ±20mV
fCLK = 100kHz
RBIAS = 400k
RBIAS = 400k (no load)
CONDITIONS
mA
-1.0
1.0
(sink)
(source)
Output Current Range
V
VSS + 0.02
VDD - 0.02
Output Voltage Swing
mV
-20
20
Offset Voltage (as unity-gain
follower)
dB
60
AV
Open-Loop Gain
V
VSS + 1.3
VDD - 1.2
CMR
Input Common-Mode
Voltage Range
LSB
2
ADC Differential Nonlinearity
mV
-20
20
VOFS
Offset Voltage
A
-50
50
Current Drive
ms
160
Conversion Time
Bits
12
ADC Resolution
V
VSS + 1.3
VDD - 1.3
Voltage Swing
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
VSS + 0.25
VDD - 0.25
ANALOG-TO-DIGITAL CONVERTER
UNCOMMITTED OP AMP
OUTPUTS (LINDAC, FSOTCDAC)
No load
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