MAX1455

Low-Cost Precision Sensor Signal Conditioner


Description

The MAX1455 is a highly integrated, sensor signal processor for resistive element sensors. The MAX1455 provides amplification, calibration, and temperature compensation that enable an overall performance approaching the inherent repeatability of the sensor. The fully analog signal path introduces no quantization noise in the output signal while enabling digitally controlled trimming with integrated 16-bit digital-to-analog converters (DACs). Offset and span are also calibrated using 16-bit DACs, allowing sensor products to be truly interchangeable.

The MAX1455 architecture includes a programmable sensor excitation, a 16-step programmable-gain amplifier (PGA), a 768-byte (6144 bits) internal EEPROM, four 16-bit DACs, an uncommitted op amp, and an on-chip temperature sensor. In addition to offset and span compensation, the MAX1455 provides a unique temperature compensation strategy that was developed to provide a remarkable degree of flexibility while minimizing testing costs.

The MAX1455 is available in die form, and in 16-pin SSOP and TSSOP packages.
MAX1455: Functional Diagram MAX1455: Functional Diagram Enlarge+

Key Features

  • Provides Amplification, Calibration, and Temperature Compensation
  • Selectable Output Clipping Limits
  • Accommodates Sensor Output Sensitivities from 5mV/V to 40mV/V
  • Single-Pin Digital Programming
  • No External Trim Components Required
  • 16-Bit Offset and Span Calibration Resolution
  • Fully Analog Signal Path
  • PRT Bridge Can Be Used for Temperature-Correction Input
  • On-Chip Lookup Table Supports Multipoint Calibration Temperature Correction
  • Fast 3.2kHz Frequency Response
  • On-Chip Uncommitted Op Amp
  • Secure-Lock™ Prevents Data Corruption

Applications/Uses

  • Accelerometer Measurements
  • Humidity Sensors
  • MR and GMR Sensors
  • Piezoresistive Silicon Sensors
  • Pressure Sensors and Transducers
  • Resistive Elements Sensors
  • Strain Gauges
Part Number Sensing Element PGA Gain Calibration Method Accuracy
(%FSO)
Output Type ICC
(mA)
IBRIDGE
(mA)
DACs/ADCs VSUPPLY
(V)
Budgetary
Price
max typ See Notes
MAX1455 
PRT
Resistive Bridge
Strain Gauge
39 to 234 (16 gains) Internal DACs updated from internal EEPROM 0.1 Analog 3 0.5 to 2.0 16-bit DAC 4.5 to 5.5 $1.90 @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.


MAX1452KEY: Evaluation Kit for the MAX1455
MAX1455EVKIT-CS: Evaluation Kit for the MAX1455
MAX1455EVKIT-NS: Evaluation Kit for the MAX1455

Technical Documents

Reference Schematic 5319 Liquid-Level Measurement System Uses a Compensated Silicon Pressure Sensor and Precision Delta-Sigma ADCs, Part 1
App Note 4207 Making the MAX1452/MAX1455 Signal Conditioners Tolerant of Supply Limitations
App Note 4067 Using the MAX1452 for Remote-Sensor Compensation
App Note 4022 MAX1452 Nonlinearity-Correction Application Circuit
App Note 3972 MAX1452/MAX1455 FAQs
App Note 3733 Startup Requirements for the MAX1452/MAX1455 Sensor Signal Conditioners
App Note 3396 Driving Strain-Gauge Bridge Sensors with Signal-Conditioning ICs
App Note 3044 Calibration of Weight Sensors Using Dead Weights
Tutorial 1860 PWM Outputs Enhance Sensor Signal Conditioners
Tutorial 1839 Sensor Temperature Compensation Using the Four DAC Signal Conditioning Architecture
App Note 1152 Step-by-Step Procedure for Performing Temperature Compensation Using MAX1452 and MAX1455 Evaluation Kit Software
App Note 1150 Direct Interface of the MAX1452/MAX1455 with the MAX1452/MAX1455 Communication Board
App Note 1069 High-Gain Signal Conditioning Circuit for Thin and Thick Film Sensors
App Note 840 MAX1455 Diagnostic Clip Boost Circuit
Tutorial 762 Design and Manufacture of Automotive Pressure Sensors
App Note 760 Overvoltage Protection in Automotive Systems
App Note 759 Adding Diagnostic Capability to MAX14XX Low Cost High Performance Signal-Conditioning Devices
App Note 753 MAX1452 Serial Communications
App Note 695 New ICs Revolutionize The Sensor Interface
App Note 637 Tech Tips: Getting the Most from Your Sensor and Conditioning Electronics

Quality and Environmental Data

Request Reliability Report for: MAX1455 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

Software
MAX1452/MAX1455 EVKIT Software

 

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    Type ID PDF Title
    Reference Schematic 5319 Liquid-Level Measurement System Uses a Compensated Silicon Pressure Sensor and Precision Delta-Sigma ADCs, Part 1
    App Note 4207 Making the MAX1452/MAX1455 Signal Conditioners Tolerant of Supply Limitations
    App Note 4067 Using the MAX1452 for Remote-Sensor Compensation
    App Note 4022 MAX1452 Nonlinearity-Correction Application Circuit
    App Note 3972 MAX1452/MAX1455 FAQs
    App Note 3733 Startup Requirements for the MAX1452/MAX1455 Sensor Signal Conditioners
    App Note 3396 Driving Strain-Gauge Bridge Sensors with Signal-Conditioning ICs
    App Note 3044 Calibration of Weight Sensors Using Dead Weights
    Tutorial 1860 PWM Outputs Enhance Sensor Signal Conditioners
    Tutorial 1839 Sensor Temperature Compensation Using the Four DAC Signal Conditioning Architecture
    App Note 1152 Step-by-Step Procedure for Performing Temperature Compensation Using MAX1452 and MAX1455 Evaluation Kit Software
    App Note 1150 Direct Interface of the MAX1452/MAX1455 with the MAX1452/MAX1455 Communication Board
    App Note 1069 High-Gain Signal Conditioning Circuit for Thin and Thick Film Sensors
    App Note 840 MAX1455 Diagnostic Clip Boost Circuit
    Tutorial 762 Design and Manufacture of Automotive Pressure Sensors
    App Note 760 Overvoltage Protection in Automotive Systems
    App Note 759 Adding Diagnostic Capability to MAX14XX Low Cost High Performance Signal-Conditioning Devices
    App Note 753 MAX1452 Serial Communications
    App Note 695 New ICs Revolutionize The Sensor Interface
    App Note 637 Tech Tips: Getting the Most from Your Sensor and Conditioning Electronics