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MAX1450

更新时间: 2024-02-10 17:31:51
品牌 Logo 应用领域
美信 - MAXIM 传感器
页数 文件大小 规格书
12页 102K
描述
Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors

MAX1450 数据手册

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19-1365; Rev 0; 5/98  
Lo w -Co s t , 1 % -Ac c u ra t e S ig n a l Co n d it io n e r  
fo r P ie zo re s is t ive S e n s o rs  
MAX1450  
Ge n e ra l De s c rip t io n  
Fe a t u re s  
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 se nsors inhe re nt re pe a ta bility e rrors, 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).  
1% Sensor Signal Conditioning  
Corrects Sensor Errors Using Coefficients Stored  
in External Trimmable Resistors, Potentiometers,  
or DACs  
Compensates Offset, Offset TC, FSO, FSO TC,  
and FSO Linearity  
Rail-to-Rail® Analog Output  
Programmable Current Source for Sensor  
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.  
Excitation  
Fast Signal-Path Settling Time (< 1ms)  
Accepts Sensor Outputs from 10mV/V to 30mV/V  
Fully Analog Signal Path  
Cu s t o m iza t io n  
Ord e rin g In fo rm a t io n  
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-  
vid e c us tomize d MAX1450 s olutions . Conta c t the  
factory for additional information.  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
PIN-PACKAGE  
20 SSOP  
MAX1450CAP  
MAX1450C/D  
MAX1450EAP  
Dice*  
20 SSOP  
* Dice are tested at T = +25°C, DC parameters only.  
A
Ap p lic a t io n s  
Piezoresistive Pressure and Acceleration  
Transducers and Transmitters  
Manifold Absolute Pressure (MAP) Sensors  
Automotive Systems  
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.  
Fu n c t io n a l Dia g ra m  
Hydraulic Systems  
Industrial Pressure Sensors  
FSOTRIM V  
DD  
P in Co n fig u ra t io n  
MAX1450  
CURRENT  
SOURCE  
V
DD  
TOP VIEW  
A2  
A1  
A0  
ISRC  
INP  
I.C.  
1
2
3
4
5
6
7
8
9
20 INM  
19  
V
SS  
I.C.  
18 BDRIVE  
17 ISRC  
16 I.C.  
BDRIVE  
INP  
+
-
SOTC  
SOFF  
A1  
OUT  
PGA  
A = 1  
INM  
MAX1450  
SOTC  
SOFF  
15  
V
DD  
OFFTC  
OFFSET  
A0  
14 OUT  
13 A2  
OFFTC  
OFFSET  
BBUF  
12 I.C.  
BBUF 10  
11 FSOTRIM  
V
SS  
SSOP  
________________________________________________________________ Maxim Integrated Products  
1
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.  

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