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 420mA 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 RequiredApplicationPressure Sensor Signal Conditioning
Weight Measurement Systems
Thermocouple and RTD Linearization
Transducers and Transmitters
Process Indicators
Calibrators and Controllers
GMR and MR Magnetic Direction Sensors
Pinout
SpecificationsVDD to VSS..............................................................-0.3V to +6.0V
VDDF to VSS ...........................................................-0.3V to +6.0V
VSSF to VSS.............................................................-0.3V to +0.3V
All Other Pins to VSS.....................................-0.3V to (VDD + 0.3V)
Continuous Power Dissipation ..................................(TA = +70°C)
28-Pin SSOP (derate 9.1mW/°C above +70°C) ................727mW
Operating Temperature Ranges
MAX1464CAI ...........................................................0°C to +70°C
MAX1464C/W...........................................................0°C to +70°C
MAX1464EAI.........................................................-40°C to +85°C
MAX1464AAI ......................................................-40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°CDescriptionThe MAX1464 is a highly integrated, low-power, lownoise multichannel sensor signal processor optimized for industrial, automotive, and process-control applications 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 linearization, and temperature compensation that enable an overall performance approaching the inherent repeatability of the sensor without requiring any external trim components.
Two 16-bit voltage-output DACs and two 12-bit PWMs can be used to indicate each of the temperature-compensated 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-programmable 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 commercial temperature ranges in a 28-pin SSOP package.
MAX1464 Data Sheet
