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參數(shù)資料
| 型號： | MAX1450CAP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | 5.30 X 0.65 MM, SSOP-20 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 98K |
| 代理商： | MAX1450CAP |
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
General Desc ription
The MAX1450 sensor signal conditioner is optimized for
piezoresistive sensor calibration and temperature com-
pensation. It includes an adjustable current source for
sensor excitation and a 3-bit programmable-gain amplifi-
er (PGA). Achieving a total typical error factor within
1% of the sensor’s inherent repeatability errors, the
MAX1450 compensates offset, full-span output (FSO), off-
set tempco, FSO tempco, and FSO nonlinearity of silicon
piezoresistive sensors via external trimmable resistors,
potentiometers, or digital-to-analog converters (DACs).
The MAX1450 is capable of compensating sensors that
display close error distributions with a single tempera-
ture point, making it ideal for low-cost, medium-accuracy
applications. Although optimized for use with popular
piezoresistive sensors, it may also be used with other
resistive sensor types such as strain gauges.
Customization
Maxim can customize the MAX1450 for unique require-
ments including improved power specifications. With a
dedicated cell library consisting of more than 90 sen-
sor-specific functional blocks, Maxim can quickly pro-
vide customized MAX1450 solutions. Contact the
factory for additional information.
Applic ations
Piezoresistive Pressure and Acceleration
Transducers and Transmitters
Manifold Absolute Pressure (MAP) Sensors
Automotive Systems
Hydraulic Systems
Industrial Pressure Sensors
Pin Configuration
Features
o
1% Sensor Signal Conditioning
o
Corrects Sensor Errors Using Coefficients Stored
in External Trimmable Resistors, Potentiometers,
or DACs
o
Compensates Offset, Offset TC, FSO, FSO TC,
and FSO Linearity
o
Rail-to-Rail
Analog Output
o
Programmable Current Source for Sensor
Excitation
o
Fast Signal-Path Settling Time (< 1ms)
o
Accepts Sensor Outputs from 10mV/V to 30mV/V
o
Fully Analog Signal Path
M
Low-Cost, 1%-Ac c urate S ignal Conditioner
for Piezoresistive S ensors
________________________________________________________________ Maxim Integrated Products
1
PGA
A = 1
OUT
ISRC
BDRIVE
INP
INM
SOTC
SOFF
OFFTC
OFFSET
BBUF
A2
A1
FSOTRIM
A0
+
-
V
DD
V
SS
CURRENT
SOURCE
V
DD
MAX1450
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
INM
V
SS
BDRIVE
ISRC
SOTC
I.C.
I.C.
INP
TOP VIEW
I.C.
V
DD
OUT
A2
OFFTC
A0
A1
SOFF
12
11
9
10
I.C.
FSOTRIM
BBUF
OFFSET
MAX1450
SSOP
19-1365; Rev 0; 5/98
PART
MAX1450CAP
MAX1450C/D
MAX1450EAP
*Dice are tested at T
A
= +25°C, DC parameters only.
-40°C to +85°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
20 SSOP
Dice*
20 SSOP
Func tional Diagram
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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