MAX1459CAP+T

更新时间： 2024-10-03 13:10:23

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数据手册

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MAX1459CAP+T 数据手册

19-1619; Rev 0; 1/00

2-Wire, 4–20mA

Smart Signal Conditioner

General Description

Features

ꢀ Highly Integrated Sensor Signal Conditioner for

The MAX1459 highly integrated analog-sensor signal

conditioner is optimized for piezoresistive sensor calibra-

tion and compensation with minimal 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 DACs.

Achieving a total error factor within 1% of the sensor’s

repeatability errors, the MAX1459 compensates offset,

offset temperature coefficient (offset TC), full-span output

(FSO), FSO temperature coefficient (FSOTC), and FSO

nonlinearity of silicon piezoresistive sensors.

2-Wire, 4–20mA Transmitters

ꢀ Sensor Errors Trimmed Using Correction

Coefficients Stored in Internal EEPROM—

Eliminates the Need for Laser Trimming and

Potentiometers

ꢀ Compensates Offset, Offset TC, FSO, FSOTC,

FSO Linearity

ꢀ Programmable Current Source (0.1mA to 2.0mA)

for Sensor Excitation

The MAX1459 calibrates and compensates first-order

temperature errors by adjusting the offset and span of

the input signal through digital-to-analog converters

(DACs), thereby eliminating quantization noise.

ꢀ Fast Signal-Path Settling Time (≈1ms)

ꢀ Accepts Sensor Outputs from +1mV/V to +40mV/V

ꢀ Fully Analog Signal Path

The MAX1459 allows temperature compensation via the

external sensor, an internal temperature-dependent

resistor, or a dedicated external temperature transduc-

er. Accuracies better than 0.5% can be achieved with

low-cost external temperature sensors (i.e., silicon tran-

sistor), depending on sensor choice.

ꢀ Internal or External Temperature Reference

Compensation

ꢀ Automated Pilot Production (Calibration/

Compensation) System Available

Built-in testability features on the MAX1459 result in the

integration of three traditional sensor-manufacturing

operations into one automated process:

ꢀ Write Protection for EEPROM Data Security

Ordering Information

• Pretest: Data acquisition of sensor performance

PART

TEMP. RANGE

PIN-PACKAGE

20 SSOP

Dice*

under the control of a host test computer.

MAX1459CAP

MAX1459C/D

MAX1459AAP

0°C to +70°C

• Calibration and compensation: Computation and

storage (in an internal EEPROM) of calibration and

compensation coefficients computed by the test

computer and downloaded to the MAX1459.

0°C to +70°C

-40°C to +125°C

20 SSOP

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

Functional Diagram appears at end of data sheet.

• Final test operation: Verification of transducer cali-

bration and compensation without removal from the

pretest socket.

Pin Configuration

Although optimized for use with piezoresistive sensors,

the MAX1459 may also be used with other resistive

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

some additional external components.

TOP VIEW

SCLK

20 V

19 NBIAS

18 CK50

17 TEMP2

16 TEMP1

15 INM

DIO

For custom versions of the MAX1459, see the Customization

section at end of data sheet.

MAX1459

FSOTC

AMP+

AMP-

AMPOUT

TEMPIN

________________________Applications

4–20mA Transmitters

14 INP

Piezoresistive Pressure and Acceleration

Industrial Pressure Sensors

13 BDRIVE

Load Cells/Wheatstone Bridges

Strain Gauges

ISRC 10

11 OUT

Temperature Sensors

SSOP

________________________________________________________________ Maxim Integrated Products

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

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

12 3 4 5 6 7...24

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与MAX1459CAP+T相关器件

型号	品牌	获取价格	描述	数据表
MAX1459CAP-T	MAXIM	获取价格	Analog Circuit, 1 Func, PDSO20, 5.30 MM, 0.65 MM PITCH, SSOP-20
MAX145ACPA	MAXIM	获取价格	+2.7V, Low-Power, 2-Channel, 108ksps, Serial
MAX145ACUA	MAXIM	获取价格	+2.7V, Low-Power, 2-Channel, 108ksps, Serial
MAX145ACUA+T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 1 Channel, Serial Access, PDSO8, MICRO MAX
MAX145ACUA-T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 2 Channel, Serial Access, PDSO8, MO-187, MI
MAX145AEPA	MAXIM	获取价格	+2.7V, Low-Power, 2-Channel, 108ksps, Serial
MAX145AEUA	MAXIM	获取价格	+2.7V, Low-Power, 2-Channel, 108ksps, Serial
MAX145AEUA+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 1 Channel, Serial Access, CMOS, PDSO8, MICR
MAX145AEUA-T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 2 Channel, Serial Access, PDSO8, MO-187, MI
MAX145AMJA	MAXIM	获取价格	+2.7V, Low-Power, 2-Channel, 108ksps, Serial

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