MAX1455 Maxim Integrated Products, MAX1455 Datasheet

MAX1455

Manufacturer Part Number

MAX1455

Description

Low-Cost Automotive Sensor Signal Conditioner

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1455.pdf (25 pages)

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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 per-

formance 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 digi-

tal-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 ampli-

fier (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 tem-

perature compensation strategy that was developed to

provide a remarkable degree of flexibility while minimiz-

ing testing costs.

The MAX1455 is available in die form, 16-pin SSOP and

TSSOP packages.

Maxim can customize the MAX1455 for high-volume

dedicated applications. Using our dedicated cell library

of more than 2000 sensor-specific function blocks,

Maxim can quickly provide a modified MAX1455 solu-

tion. Contact Maxim for further information.

19-2088; Rev 1; 10/01

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

A detailed Functional Diagram appears at end of data sheet.

Secure-Lock is a trademark of Maxim Integrated Products, Inc.

Pressure Sensors and Transducers

Piezoresistive Silicon Sensors

Strain Gauges

Resistive Element Sensors

Accelerometers

Humidity Sensors

MR and GMR Sensors

Ratiometric Voltage Output

Programmable Output Clip Limits

________________________________________________________________ Maxim Integrated Products

General Description

Low-Cost Automotive Sensor Signal

Customization

Applications

Outputs

o Provides Amplification, Calibration, and

o Selectable Output Clipping Limits

o Accommodates Sensor Output Sensitivities

o Single-Pin Digital Programming

o No External Trim Components Required

o 16-Bit Offset and Span Calibration Resolution

o Fully Analog Signal Path

o PRT Bridge Can Be Used for Temperature-

o On-Chip Lookup Table Supports Multipoint

o Fast 3.2kHz Frequency Response

o On-Chip Uncommitted Op Amp

o Secure-Lock™ Prevents Data Corruption

*Future product—contact factory for availability.

**Dice are tested at T

MAX1455EUE*

MAX1455AUE*

MAX1455EAE

MAX1455AAE

MAX1455C/D

Temperature Compensation

from 5mV/V to 40mV/V

Correction Input

Calibration Temperature Correction

TOP VIEW

PART

TEST1

AMP+

OUT

BDR

INM

INP

DD1

-40°C to +85°C

-40°C to +125°C

-40°C to +85°C

-40°C to +125°C

-40°C to +85°C

TEMP. RANGE

= +25°C, DC parameters only.

Ordering Information

SSOP/TSSOP

MAX1455

Conditioner

Pin Configuration

16 TSSOP

16 SSOP

PIN-PACKAGE

Dice**

TEST2

TEST3

TEST4

DIO

UNLOCK

AMP-

AMPOUT

DD2

Features

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