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MAX1454

Precision Sensor Signal Conditioner with Overvoltage Protection

Low-Cost, Precision Sensor Signal Conditioner

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1454 is a highly integrated analog sensor signal conditioner targeted for automotive applications. The device provides amplification, calibration, and temperature compensation to 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 of the output. Offset and span are calibrated with integrated 16-bit DACs, allowing sensors to be truly interchangeable.

The device architecture includes a programmable sensor excitation, a 32-step programmable-gain amplifier (PGA), a 2K x 8 bits internal flash memory, four 16-bit DACs, and an on-chip temperature sensor. In addition to offset and span compensation, the device provides a unique temperature-compensation method for offset TC and FSO TC to provide a remarkable degree of flexibility while minimizing manufacturing costs.

The device is packaged in a 16-pin TSSOP and covers the automotive AEC-Q100 Grade 1 temperature range of -40°C to +125°C.

Data Sheet

Download	Rev 0	(PDF, 1.7MB)
E-Mail

An evaluation kit is available: MAX1454DBSYS, MAX1454EVSYS

Key Features

Complete Signal Conditioning in a Single IC Package
- Provides Amplification, Calibration, and Temperature Compensation
- Accommodates Sensor Output Sensitivities from 1mV/V to 200mV/V
- Overvoltage Protection to 45V
- Reverse-Voltage Protection to 45V
High-Precision Compensation Reduces Downstream Circuit Complexity
- Fully Analog Signal Path
- 16-Bit Offset and Span-Calibration Resolution
- On-Chip Lookup Table Supports Multipoint Calibration Temperature Correction
Supports Both Current and Voltage-Bridge Excitation
Fast 85µs Step Response
Sensor Fault Detection
Simple PCB Layout
Single-Pin Digital Programming
No External Trim Components Required

Applications/Uses

Humidity Sensors
Pressure Calibrators and Controllers
Pressure Sensors
Resistive Element Sensors
Strain Gauges

Key Specifications:

Sensor Signal Conditioners

Part Number

Sensing Element

PGA Gain

Calibration Method

Accuracy
(%FSO)

Output Type

I_CC
(mA)

I_BRIDGE
(mA)

DACs/ADCs

V_SUPPLY
(V)

max

typ

MAX1454

PRT

Resistive Bridge

Strain Gauge

6 to 2048 (32 gains)

Internal DACs updated from internal EEPROM

0.1

Analog

2.5

0.1 to 2.5

16-bit ADC

3 to 5.5

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 prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Functional Diagram

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-5945 Rev 0; 2011-07-14
This page last modified: 2011-07-27