MAX1478

更新时间： 2024-11-08 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
20页	210K
描述
1% Accurate, Digitally Trimmed,Rail-to-Rail Sensor Signal Conditioner

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MAX1478 数据手册

19-1538; Rev 0; 9/99

1% Accurate, Digitally Trimmed,

Rail-to-Rail Sensor Signal Conditioner

General Description

Features

ꢀ Medium Accuracy ( 1%), Single-Chip Sensor

The MAX1478 highly integrated, analog sensor signal

processor is optimized for piezoresistive sensor calibra-

tion and compensation without any external compo-

nents. It includes a programmable current source for

sensor excitation, a 3-bit programmable-gain amplifier

(PGA), a 128-bit internal EEPROM, and four 12-bit digi-

tal-to-analog converters (DACs). Achieving a total error

factor within 1% of the sensor’s repeatability errors, the

MAX1478 compensates offset, offset temperature coeffi-

cient, full-span output (FSO), FSO temperature coeffi-

cient (FSO TC), and FSO nonlinearity of silicon

piezoresistive sensors.

Signal Conditioning

ꢀ Rail-to-Rail^®Output

ꢀ Sensor Errors Trimmed Using Correction

Coefficients Stored in Internal EEPROM—

Eliminates Laser Trimming and Potentiometers

ꢀ Compensates Offset, Offset TC, FSO, FSO TC,

and FSO Linearity

ꢀ Programmable Current Source (0.1mA to 2.0mA)

for Sensor Excitation

The MAX1478 calibrates and compensates first-order

temperature errors by adjusting the offset and span of

the input signal via DACs, thereby eliminating the quan-

tization noise associated with digital signal path solu-

tions. Built-in testability features on the MAX1478 result

in the integration of three traditional sensor-manufactur-

ing operations into one automated process:

ꢀ Fast Signal-Path Settling Time (<1ms)

ꢀ +5V Single Supply

ꢀ Accepts Sensor Outputs from +10mV/V to

+40mV/V

ꢀ Fully Analog Signal Path

• Pretest: Data acquisition of sensor performance

Pilot Production System

under the control of a host test computer.

To simplify your pressure sensor design, Maxim has

developed a fully automated pilot production system

that will smooth the difficult transition from prototype to

production. Details appear at the end of this data sheet.

• Calibration and compensation: Computation and

storage (in an internal EEPROM) of calibration and

compensation coefficients computed by the test

computer and downloaded to the MAX1478.

• Final test operation: Verification of transducer cali-

bration and compensation without removal from the

pretest socket.

Ordering Information

PART

TEMP. RANGE

PIN-PACKAGE

MAX1478C/D

MAX1478AAE

0°C to +70°C

Dice*

Although optimized for use with piezoresistive sensors,

the MAX1478 may also be used with other resistive

sensors (i.e., accelerometers and strain gauges) with

some additional external components.

-40°C to +125°C

16 SSOP

*Dice are tested at T = +25°C, DC parameters only.

Functional Diagram appears at end of data sheet.

______________________Customization

Pin Configuration

For high-volume applications, Maxim can customize the

MAX1478 for unique requirements. With a dedicated

cell library consisting of more than 90 sensor-specific

functional blocks, Maxim can quickly provide cus-

tomized MAX1478 solutions.

TOP VIEW

SCLK

16 I.C.

I.C.

14 INM

13 BDRIVE

12 INP

________________________Applications

Piezoresistive Pressure and Acceleration

Transducers and Transmitters

Manifold Absolute Pressure (MAP) Sensors

Automotive Systems

TEMP

FSOTC

DIO

MAX1478

11 I.C.

10 OUT

Hydraulic Systems

ISRC

Industrial Pressure Sensors

Strain-Gauge Sensors

SSOP

Industrial Temperature Sensors

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7...20

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MAX14780E	MAXIM	获取价格	5.0V, 30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver
MAX14780E	ADI	获取价格	+5.0V、±30kV ESD保护、失效保护、热插拔、RS-485/RS-422收发器
MAX14780E_11	MAXIM	获取价格	5.0V, 30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver
MAX14780E_1110	MAXIM	获取价格	5.0V, 30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver
MAX14780EEPA	MAXIM	获取价格	5.0V, 30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver
MAX14780EEPA+	MAXIM	获取价格	暂无描述
MAX14780EESA	MAXIM	获取价格	5.0V, 30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver
MAX14780EESA+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO8, ROHS COMPLIANT, SOP-8
MAX14780EESA+T	MAXIM	获取价格	Line Transceiver,
MAX14781E	ADI	获取价格	带有极性校正的半双工RS-485收发器

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