MAX1450

更新时间： 2024-11-19 22:57:59

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

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中文翻译

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数据手册

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MAX1450 数据手册

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 nsor’s 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

-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.

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

P in Co n fig u ra t io n

MAX1450

CURRENT

SOURCE

TOP VIEW

ISRC

INP

I.C.

20 INM

I.C.

18 BDRIVE

17 ISRC

16 I.C.

BDRIVE

INP

SOTC

SOFF

OUT

PGA

A = 1

INM

MAX1450

SOTC

SOFF

OFFTC

OFFSET

14 OUT

13 A2

OFFTC

OFFSET

BBUF

12 I.C.

BBUF 10

11 FSOTRIM

SSOP

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...12

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