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MAX1464

Description
Low-Power, Low-Noise Multichannel Sensor Signal Processor
File Size538KB,47 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX1464 Overview

Low-Power, Low-Noise Multichannel Sensor Signal Processor

19-3579; Rev 0; 2/05
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
General Description
The MAX1464 is a highly integrated, low-power, low-
noise multichannel sensor signal processor optimized
for industrial, automotive, and process-control applica-
tions such as pressure sensing and compensation,
RTD and thermocouple linearization, weight sensing
and classification, and remote process monitoring with
limit indication.
The MAX1464 accepts sensors with either single-ended
or differential outputs. The MAX1464 accommodates
sensor output sensitivities from 1mV/V to 1V/V. The
MAX1464 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 to buffer the DAC outputs, drive heavier
external loads, or provide additional gain and filtering.
The MAX1464 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 MAX1464 operates from a single 5.0V (typ) supply
and is packaged for automotive, industrial, and com-
mercial temperature ranges in a 28-pin SSOP package.
Features
Programmable Amplification, Calibration,
Linearization, and Temperature Compensation
Two Differential or Four Single-Ended ADC Input
Channels
Accommodates Sensor Output Sensitivities from
1mV/V to 1V/V
Two DAC/PWM Output Signal Channels
Supports 4–20mA Current Loop Applications
4kB of FLASH Memory for Code and Coefficients
128 Bytes of FLASH Memory for User Information
Integrated Temperature Sensing
Flexible Dual Op-Amp Block
Programmable Sensor Input Gain and Offset
Programmable Sensor Sampling Rate and
Resolution
No External Trim Components Required
MAX1464
Ordering Information
PART
MAX1464CAI
MAX1464C/W*
MAX1464EAI
MAX1464AAI
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
PIN-PACKAGE
28 SSOP
Die
28 SSOP
28 SSOP
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
*Dice
are tested at T
A
= +25°C, DC parameters only.
Pin Configuration
TOP VIEW
OUT1SM 1
AMP1M 2
AMP1P 3
OUT1LG 4
N.C. 5
V
DD
6
N.C. 7
CKSEL 8
CKIO 9
28 OUT2SM
27 AMP2M
26 AMP2P
MAX1464
25 OUT2LG
24 V
REF
23 INP1
22 INM1
21 INP2
20 INM2
19 V
SS
18 V
SSF
17 GPIO2
16 GPIO1
15 V
DDF
Functional Diagram and Detailed Block Diagram appear at
end of data sheet.
SPI is a trademark of Motorola, Inc.
CS 10
DO 11
DI 12
SCLK 13
V
SS
14
SSOP
________________________________________________________________
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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