參數(shù)資料
型號(hào)： MAX1457ACJ
廠(chǎng)商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 模擬信號(hào)調(diào)理
英文描述： 0.1%-Accurate Signal Conditioner for Piezoresistive Sensor Compensation
中文描述： SPECIALTY ANALOG CIRCUIT, PQFP32
封裝： TQFP-32
文件頁(yè)數(shù)： 3/12頁(yè)
文件大?。?/td> 93K
代理商： MAX1457ACJ
M
0.1%-Ac c urate S ignal Conditioner
for Piezoresistive S ensor 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 13μA at a refresh rate of 3Hz
(f
CLK
= 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)
(V
DD
= +5V, V
SS
= 0V, T
A
= +25°C, unless otherwise noted.)
V
BR
= 2.5V to 3.5V, f
CLK
= 100kHz
V
OUT
= (V
SS
+ 0.25V) to (V
DD
- 0.25V)
(V
IN
- V
OUT
) at V
IN
= 2.5V,
R
BIAS
= 400k
(no load)
5k
load to V
SS
or V
DD
No load
R
BIAS
= 400k
, V
IN
= 2.5V (no load)
R
BIAS
= 400k
, V
IN
= 2.5V,
V
OUT
= 2.5V ±20mV
f
CLK
= 100kHz
R
BIAS
= 400k
R
BIAS
= 400k
(no load)
CONDITIONS
mA
-1.0
(sink) (source)
1.0
Output Current Range
V
V
SS
+ 0.02 V
DD
- 0.02
Output Voltage Swing
mV
-20
20
Offset Voltage (as unity-gain
follower)
dB
60
A
V
Open-Loop Gain
V
V
SS
+ 1.3
V
DD
- 1.2
CMR
Input Common-Mode
Voltage Range
LSB
2
ADC Differential Nonlinearity
mV
-20
20
V
OFS
Offset Voltage
μA
-50
50
Current Drive
ms
Bits
160
Conversion Time
ADC Resolution
OUTPUTS
(LINDAC, FSOTCDAC)
12
V
V
SS
+ 1.3
V
DD
- 1.3
Voltage Swing
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
SS
+ 0.25 V
DD
- 0.25
ANALOG-TO-DIGITAL CONVERTER
UNCOMMITTED OP AMP
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