MAX1455

Low-Cost Automotive Sensor Signal Conditioner

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Status Explanations for product status codes

Part Number Status
MAX1455 Active: In Production. See Ordering Information for details.

Description

The MAX1455 is a highly integrated automotive analog-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, 16-pin SSOP and TSSOP packages.

Data Sheet

Download this datasheet in PDF formatDownload Rev 1 (PDF, 360kB)
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An evaluation board is available: MAX1452KEY, MAX1455EVKIT, MAX1455EVKIT-CS, MAX1455EVKIT-NS

NOTE: This product uses the following:
MAX1452/MAX1455 EVKIT Software

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
   

Key Specifications:

Sensor Signal Conditioners
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 (10)

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.



Diagram

MAX1455: Functional Diagram
Functional Diagram

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Information Index

Document Ref.: 19-2088 Rev 1; 2001-11-14
This page last modified: 2009-10-15