Low-Cost Precision Sensor

Signal Conditioner

________________________________________________________________ Maxim Integrated Products

1

19-1829; Rev 1; 6/01

EVALUATION

KIT

AVAILABLE

General Description

The MAX1452 is a highly integrated analog-sensor sig-

nal processor optimized for industrial and process con-

trol applications utilizing resistive element sensors.

The MAX1452 provides amplification, calibration, and

temperature compensation that enables 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 the integrated 16-bit

DACs. Offset and span are calibrated using 16-bit

DACs, allowing sensor products to be truly inter-

changeable.

The MAX1452 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 MAX1452 provides a unique tem-

perature compensation strategy for offset TC and

FSOTC that was developed to provide a remarkable

degree of flexibility while minimizing testing costs.

The MAX1452 is packaged for the commercial, industri-

al, and automotive temperature ranges in 16-pin SSOP

packages.

Customization

Maxim can customize the MAX1452 for high-volume

dedicated applications. Using our dedicated cell library

of more than 2000 sensor-specific functional blocks,

Maxim can quickly provide a modified MAX1452 solu-

tion. Contact Maxim for further information.

Applications

Pressure Sensors

Transducers and Transmitters

Strain Gauges

Pressure Calibrators and Controllers

Resistive Elements Sensors

Accelerometers

Humidity Sensors

Outputs Supported

4–20mA

+0.5V to +4.5V Ratiometric

+2.5V to ±2.5V

Features

o Provides Amplification, Calibration, and

Temperature Compensation

o Accommodates Sensor Output Sensitivities

from 1mV/V to 40mV/V

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 On-Chip Lookup Table Supports Multipoint

Calibration Temperature Correction

o Supports Both Current and Voltage Bridge

Excitation

o Fast 3.2kHz Frequency Response

o On-Chip Uncommitted Op Amp

o Secure-Lock™ Prevents Data Corruption

o Low 2mA Current Consumption

Rail-to-Rail is a trademark of Nippon Motorola Ltd.

Secure-Lock is a trademark of Maxim Integrated Products.

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

ISRC

FSOTC

AMP+

AMP-

AMPOUT

CLK1M

DIO

UNLOCK

TOP VIEW

MAX1452

(NOT TO SCALE)

SSOP

OUT

INP

INM

BDR

TEST

Pin Configuration

Ordering Information

16 SSOP

PIN-PACKAGE

TEMP. RANGE

0°C to +70°C

MAX1452CAE

PART

16 SSOP

-40°C to +85°C

MAX1452EAE

16 SSOP

-40°C to +125°C

MAX1452AAE

Dice*

0°C to +70°C

MAX1452C/D

A detailed block diagram appears at the end of data sheet.

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.