描述 Description

The MAX1462 implements a revolutionary concept in signal conditioning, where the output of its 16-bit analog-to-digital converter (ADC) is digitally corrected over the specified temperature range. This feature can be readily exploited by industrial and medical market segments, in applications such as sensors and smart batteries. Digital correction is provided by an internal digital signal processor (DSP) and on-chip 128-bit EEPROM containing user-programmed calibration coefficients. The conditioned output is available as a 12-bit digital word and as a ratiometric (proportional to the supply voltage) analog voltage using an on-board 12-bit digital-to-analog converter (DAC). The uncommitted op amp can be used to filter the analog output.
The analog front end includes a 2-bit programmable-gain amplifier (PGA) and a 3-bit coarse-offset (CO) DAC, which condition the sensor's output. This coarsely corrected signal is digitized by a 16-bit ADC. The DSP uses the digitized sensor signal, the temperature sensor, and correction coefficients stored in the internal EEPROM to produce the conditioned output.
Multiple or batch manufacturing of sensors is supported with a completely digital test interface. Built-in testability features on the MAX1462 result in the integration of three traditional sensor-manufacturing operations into one automated process: Pretest: Data acquisition of sensor performance under the control of a host test computer. Calibration and compensation: Computation and storage of calibration and compensation coefficients determined from transducer pretest data. Final test operation: Verification of transducer calibration and compensation, without removal from the pretest socket. The MAX1462 evaluation kit (EV kit) allows fast evaluation and prototyping, using a piezoresistive transducer (PRT) and a Windows?-based PC. The user-friendly EV kit simplifies small-volume prototyping; it is not necessary to understand fully the test-system interface, the calibration algorithm, or many other details to evaluate the MAX1462 with a particular sensor. Plug the PRT into the EV kit, plug the EV kit into a PC parallel port, connect the sensor to an excitation source (such as a pressure controller), and run the MAX1462 EV kit software. An oven is required for thermal compensation.

特性 Features

? Low-Voltage Operation (2.4V to 3.6V)
? Low-Noise, 310μA Single-Chip Sensor Signal Conditioning
? High-Precision Front End Resolves

應(yīng)用 Application

? 潛入式計(jì)算機(jī)與液位測(cè)量
? 流量計(jì)
? 手持式儀表(PDA、掌上電腦)
? 水壓系統(tǒng)
? 工業(yè)壓力傳感器與校準(zhǔn)器
? 壓阻式壓力及加速度變送器與發(fā)送器
? 智能電池組/充電器
? 稱重儀與張力測(cè)量

簡介

MAX1462屬于開發(fā)板套件編程器的評(píng)估演示板及套件。由制造生產(chǎn)的MAX1462評(píng)估和演示板及套件該系列產(chǎn)品提供了一種方便的方法，在經(jīng)過驗(yàn)證的實(shí)施環(huán)境中評(píng)估某些重點(diǎn)器件的性能或特性。評(píng)估方法通常有完善的文檔說明，并且視乎具體情況由評(píng)估軟件提供支持。產(chǎn)品通常由印刷電路板組成，板上已裝有重點(diǎn)器件以及必要或有用的支持元器件，另外也可能包括其他組件，例如電纜或電源。對(duì)于數(shù)量特別多或類別獨(dú)特的器件類別(如 ADC、DAC 和開關(guān)模式電源)，評(píng)估平臺(tái)可組合為一個(gè)單獨(dú)的產(chǎn)品系列。