General 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 automotive, 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.

Features

♦ Low-Voltage Operation (2.4V to 3.6V)

♦ Low-Noise, 310µA Single-Chip Sensor Signal

Conditioning

♦ High-Precision Front End Resolves <400nV 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 Calibrators

Smart Battery Charge Systems

Weigh Scales and Strain-Gauge Measurement

Flow Meters

Dive Computers and Liquid-Level Sensing

Hydraulic Systems

Automotive Systems