MAX1463 Datasheet, PDF (1/49 Pages) Maxim Integrated Products – Low-Power Two-Channel Sensor Signal Processor

19-2549; Rev 0; 8/02
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.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
SPI is a trademark of Motorola, Inc.
Features
o Programmable Amplification, Calibration,
Linearization, and Temperature Compensation
o Two Differential or Four Single-Ended Sensor
Input Channels
o Accommodates Sensor Output Sensitivities from
1mV/V to 1V/V
o Two DAC/PWM Output Signal Channels
o 4–20mA Output Capability
o 4kB of FLASH Memory for Code and Coefficients
o 128 Bytes of FLASH Memory for User Information
o Integrated Temperature Sensor
o Flexible Dual Op-Amp Blocks
o Programmable Sensor Input Gain and Offset
o Programmable Sensor Sampling Rate and
Resolution
o Programmable Current Excitation Source for
Bridge Sensors
o Buffered 1.25V Output Reference
o 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 T_A = +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
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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.