MAX1464AAI+

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1. Describe

The MAX1464AAI+ is a highly integrated, low-power, low-noise Multi-channel sensor signal processor optimized for industrial and process control applications such as pressure sensing and compensation, RTD and thermocouple linearization, weight sensing and classification, and remote Process monitoring with limit indication. The MAX1464 accepts sensors with either single-ended or differential output. The MAX1464 accommodates sensor output sensitivity from 1mV/V to 1V/V. The MAX1464 provides amplification, calibration, signal linearization, and temperature compensation to bring overall performance close to the inherent repeatability of the sensor without any external cosmetic components. Two 16-bit voltage output DACs and two 12-bit PWMs can be used to indicate each temperature compensated sensor signal independently, as a sum or difference signal, or a user-defined relationship between each signal and temperature. Uncommitted op amps can be used to buffer DAC outputs, drive heavier external loads, or Provides additional gain and filtering. The MAX1464 includes a 16-bit CPU, user-programmable 4kB FLASH program memory, 128 bytes of FLASH user information, a 16-bit ADC, two 16-bit DACs, two 12-bit PWM digital outputs, four rail-to-rail operational amplifiers, An SPI™ compatible interface, two GPIOs, and an on-chip temperature sensor. The MAX1464 operates from a single 5.0V (typ) supply and is available in a 28-pin SSOP package for the automotive, industrial, and commercial temperature ranges.

2. Features

    1. Programmable Amplification, Calibration, Linearization, and Temperature Compensation

    2. Two Differential or Four Single-Ended ADC Input Channels

    3. Accommodates Sensor Output Sensitivities from 1mV/V to 1V/V

    4. Two DAC/PWM Output Signal Channels

    5. Supports 4–20mA Current Loop Applications

    6. 4kB of FLASH Memory for Code and Coefficients

    7. 128 Bytes of FLASH Memory for User Information

    8. Integrated Temperature Sensing

    9. Flexible Dual Op-Amp Block

  10. Programmable Sensor Input Gain and Offset

  11. Programmable Sensor Sampling Rate and Resolution

  12. No External Trim Components Required

3. Applications

    1. Pressure Sensor Signal Conditioning

    2. Weight Measurement Systems

    3. Thermocouple and RTD Linearization

    4. Transducers and Transmitters

    5. Process Indicators

    6. Calibrators and Controllers

    7. GMR and MR Magnetic Direction Sensors

4. Pin configuration

5. Pin Description