描述 Description

The MAX1458 highly integrated analog-sensor signal processor is optimized for piezoresistive sensor calibration and compensation without any external components. 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 MAX1458 compensates offset, offset temperature coefficient, full-span output (FSO), FSO temperature coefficient (FSOTC), and FSO nonlinearity of silicon piezoresistive sensors.
The MAX1458 calibrates and compensates first-order temperature errors by adjusting the offset and span of the input signal via digital-to-analog converters (DACs), thereby eliminating quantization noise. Built-in testability features on the MAX1458 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 (in an internal EEPROM) of calibration and compensation coefficients computed by the test computer and downloaded to the MAX1458.
Final test operation:Verification of transducer calibration and compensation without removal from the pretest socket.
Although optimized for use with piezoresistive sensors, the MAX1458 may also be used with other resistive sensors (i.e., accelerometers and strain gauges) with some additional external components.

特性 Features

? Medium Accuracy (±1%), Single-Chip Sensor Signal Conditioning
? 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
? Fast Signal-Path Settling Time (

應用 Application

? 水壓系統(tǒng)
? 歧管絕對壓力(MAP)傳感器
? 壓阻式壓力及加速度傳感器
? 變送器與發(fā)送器

簡介

MAX1458屬于集成電路（IC）的驅(qū)動器接收器收發(fā)器。由制造生產(chǎn)的MAX1458驅(qū)動器，接收器，收發(fā)器該系列產(chǎn)品的主要功能是提供必需的硬件資源，以通過延長電纜或印制線進行通信。確切的功能會因所采用的通信協(xié)議而異，可能包括諸如瞬態(tài)抑制之類的功能，這些功能對于通信用途可能并非絕對必要，但對于可能的使用環(huán)境卻是明智之選。