MAX1464

Low-Power, Low-Noise Multichannel Sensor Signal Processor

Multichannel Sensor Signal Processor Provides Amplification, Calibration, Linearization, and Temperature Compensation of Variety of Sensors


Description

The MAX1464 is a highly integrated, low-power, low-noise multichannel 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 outputs. The MAX1464 accommodates sensor output sensitivities from 1mV/V to 1V/V. The MAX1464 provides amplification, calibration, signal linearization, and temperature compensation that enable an overall performance approaching the inherent repeatability of the sensor without requiring any external trim components.

Two 16-bit voltage-output DACs and two 12-bit PWMs can be used to indicate each of the temperature-compensated sensor signals independently, as a sum or difference signal, or user-defined relationship between each signal and temperature. Uncommitted op amps are available to buffer the DAC outputs, drive heavier external loads, or provide additional gain and filtering.

The MAX1464 incorporates a 16-bit CPU, user-programmable 4kB of FLASH program memory, 128 bytes of FLASH user information, one 16-bit ADC, two 16-bit DACs, two 12-bit PWM digital outputs, four rail-to-rail op amps, one SPI™-compatible interface, two GPIOs, and one on-chip temperature sensor.

The MAX1464 operates from a single 5.0V (typ) supply and is packaged for automotive, industrial, and commercial temperature ranges in a 28-pin SSOP package.

MAX1464: Functional Diagram MAX1464: Functional Diagram Enlarge+

Key Features

  • Programmable Amplification, Calibration, Linearization, and Temperature Compensation
  • Two Differential or Four Single-Ended ADC Input Channels
  • Accommodates Sensor Output Sensitivities from 1mV/V to 1V/V
  • Two DAC/PWM Output Signal Channels
  • Supports 4-20mA Current Loop Applications
  • 4kB of FLASH Memory for Code and Coefficients
  • 128 Bytes of FLASH Memory for User Information
  • Integrated Temperature Sensing
  • Flexible Dual Op-Amp Block
  • Programmable Sensor Input Gain and Offset
  • Programmable Sensor Sampling Rate and Resolution
  • No External Trim Components Required

Applications/Uses

  • Calibrators and Controllers
  • GMR and MR Magnetic Direction Sensors
  • Pressure Sensor Signal Conditioning
  • Process Indicators
  • Thermocouple and RTD Linearization
  • Transducers and Transmitters
  • Weight Measurement Systems
Part Number Sensing Element PGA Gain Calibration Method Accuracy
(%FSO)
Output Type ICC
(mA)
Interface Microcontroller/CPU DACs/ADCs VSUPPLY
(V)
Budgetary
Price
max typ See Notes
MAX1464 
PRT
RTD
Strain Gauge
Thermocouple
0.99 to 244 (17 gains) Programmable 16-BIT CPU with on-board EEPROM 0.25
Analog
Digital
PWM
1.5 SPI CPU (16-bit, 4 MHz)
16-bit ADC
16-bit DAC
4.5 to 5.5 $5.63 @1k
See All Sensor Signal Conditioners (12)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX1464EVKIT: Evaluation Kit for the MAX1464
 

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