General Description

The MAX1460 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, or implement a 2-wire, 4–20mA transmitter.

Features

● Low-Noise, 400μA Single-Chip Sensor Signal Conditioning

● High-Precision Front End Resolves Less than 1μV of Differential Input Signal

● On-Chip DSP and EEPROM Provide Digital Correction of Sensor Errors

● 16-Bit Signal Path Compensates Sensor Offset and Sensitivity and Associated Temperature Coefficients

● 12-Bit Parallel Digital Output

● Analog Output

● Compensates a Wide Range of Sensor Sensitivity and Offset

● Single-Shot Automated Compensation Algorithm—No Iteration Required

● Built-In Temperature Sensor

● Three-State, 5-Wire Serial Interface Supports High-Volume Manufacturing

Applications

● Hand-Held Instruments

● Piezoresistive Pressure and Acceleration Transducers and Transmitters

● Industrial Pressure Sensors and 4–20mA Transmitters

● Smart Battery Charge Systems

● Weigh Scales and Strain-Gauge Measurement

● Flow Meters

● Dive Computers and Liquid-Level Sensing

● Hydraulic Systems