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MAX1463

Low-Power Two-Channel Sensor Signal Processor

Maxim Integrated 

19-2549; Rev 0a; 11/04

Low-Power Two-Channel Sensor

Signal Processor

General Description

The MAX1463 is a highly integrated, low-power, two-

channel sensor signal processor optimized for industri-

al and process control applications such as pressure

sensing and compensation, RTD and thermal-couple

linearization, weight sensing and classification, and

remote process monitoring with limit indication.

The MAX1463 accommodates sensors with outputs

ranging from 1mV/V to 1V/V and supports both pro-

grammable current and voltage sensor excitation. The

MAX1463 provides amplification, calibration, signal lin-

earization, and temperature compensation that enable

an overall performance approaching the inherent

repeatability of the sensor without requiring any exter-

nal trim components.

Two 16-bit voltage output DACs and two 12-bit PWMs

can be used to indicate each of the temperature-com-

pensated sensor signals independently, as a sum or

difference signal, or user-defined relationship between

each signal and temperature. Uncommitted op amps

are available for buffering the DAC outputs, driving

heavier external loads, or providing additional gain and

filtering.

The MAX1463 incorporates a 16-bit CPU, user-pro-

grammable 4kB of FLASH program memory, 128 bytes

of FLASH user information, one 16-bit ADC, two 16-bit

DACs, two 12-bit PWM digital outputs, four rail-to-rail op

amps, one SPI™-compatible interface, two GPIOs, and

one on-chip temperature sensor.

The MAX1463 operates from a single 5.0V supply and

is packaged for automotive, industrial, and commercial

temperature ranges in a 28-pin SSOP package.

Applications

Pressure Sensor Signal Conditioning

Weight Measurement Systems

Thermocouple and RTD Linearization

Transducers and Transmitters

Process Indicators

Calibrators and Controllers

GMR and MR Magnetic Direction Sensors

Functional Diagram and Detailed Block Diagram appear at

end of data sheet.

SPI is a trademark of Motorola, Inc.

Features

♦ Programmable Amplification, Calibration,

Linearization, and Temperature Compensation

♦ Two Differential or Four Single-Ended Sensor

Input Channels

♦ Accommodates Sensor Output Sensitivities from

1mV/V to 1V/V

♦ Two DAC/PWM Output Signal Channels

♦ 4–20mA Output Capability

♦ 4kB of FLASH Memory for Code and Coefficients

♦ 128 Bytes of FLASH Memory for User Information

♦ Integrated Temperature Sensor

♦ Flexible Dual Op-Amp Blocks

♦ Programmable Sensor Input Gain and Offset

♦ Programmable Sensor Sampling Rate and

Resolution

♦ Programmable Current Excitation Source for

Bridge Sensors

♦ Buffered 1.25V Output Reference

♦ No External Trim Components Required

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX1463CAI

0°C to +70°C

28 SSOP

MAX1463C/W*

0°C to +70°C

Die

MAX1463EAI

-40°C to +85°C

28 SSOP

MAX1463AAI

-40°C to +125°C 28 SSOP

*Dice are tested at TA = +25°C, DC parameters only.

Pin Configuration

TOP VIEW

OUT1SM 1

AMP1M 2

AMP1P 3

OUT1LG 4

VBG 5

VDD 6

N.C. 7

CKSEL 8

CKIO 9

CS 10

DO 11

DI 12

SCLK 13

VSS 14

MAX1463

SSOP

28 OUT2SM

27 AMP2M

26 AMP2P

25 OUT2LG

24 ISRC

23 INP1

22 INM1

21 INP2

20 INM2

19 VREF

18 VSS

17 GPIO2

16 GPIO1

15 VDDF

________________________________________________________________ Maxim Integrated Products 1

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.

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