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MAX145BEWG, MAX1460, MAX1460CCM

Table of contents:
Info of MAX145BEWG
Info of MAX1460
Info of MAX1460CCM

MAX145BEWG, MAX1460, MAX1460CCM Selling Leads, Datasheet

MFG:MAXIM Package Cooled:SMD

MAX145BEWG, MAX1460, MAX1460CCM Datasheet download

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Part Number: MAX145BEWG

MFG: MAXIM

Package Cooled: SMD

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MAX1460 General Description

The MAX1460 implements a revolutionary concept in signal conditioning, where the output of its 16-bit analog- to-digital converter (ADC) is digitally corrected over the specified temperature range. This feature can be readily exploited by automotive, industrial, and medical market segments, in applications such as sensors and smart batteries. Digital correction is provided by an internal digital signal processor (DSP) and on-chip 128- bit EEPROM containing user-programmed calibration coefficients. The conditioned output is available as a 12-bit digital word and as a ratiometric (proportional to the supply voltage) analog voltage using an on-board 12-bit digital-to-analog converter (DAC). The uncommitted op amp can be used to filter the analog output,or implement a 2-wire, 420mA transmitter.

The analog front end includes a 2-bit programmablegain amplifier (PGA) and a 3-bit coarse-offset (CO) DAC, which condition the sensor's output. This coarsely corrected signal is digitized by a 16-bit ADC. The DSP uses the digitized sensor signal, the temperature sensor, and correction coefficients stored in the internal EEPROM to produce the conditioned output.

Multiple or batch manufacturing of sensors is supported with a completely digital test interface. Built-in testability features on the MAX1460 result in the integration of three traditional sensor-manufacturing operations into one automated process: • Pretest: Data acquisition of sensor performance under the control of a host test computer. • Calibration and Compensation: Computation and storage of calibration and compensation coefficients determined from transducer pretest data. • Final Test Operation: Verification of transducer calibration and compensation, without removal from the pretest socket.

The MAX1460 evaluation kit (EV kit) allows fast evaluation and prototyping, using a piezoresistive transducer (PRT) and a Windows^®-based PC. The user-friendly EV kit simplifies small-volume prototyping; it is not necessary to fully understand the test-system interface, the calibration algorithm, or many other details to evaluate the MAX1460 with a particular sensor. Simply plug the PRT into the EV kit, plug the EV kit into a PC parallel port, connect the sensor to an excitation source (such as a pressure controller), and run the MAX1460 EV kit software. An oven is required for thermal compensation.

MAX1460 Maximum Ratings

Supply Voltage, VDD to VSS......................................-0.3V to +6V
All Other Pins ...................................(VSS - 0.3V) to (VDD + 0.3V)
Short-Circuit Duration, All Outputs .............................Continuous
Continuous Power Dissipation ................................(TA = +70°C)
48-Pin TQFP (derate 12.5mW/°C above +70°C )...........1000mW
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C

MAX1460 Features

Low-Noise, 400µA Single-Chip Sensor SignalConditioning
High-Precision Front End Resolves Less than 1µVof Differential Input Signal
On-Chip DSP and EEPROM Provide DigitalCorrection of Sensor Errors
16-Bit Signal Path Compensates Sensor Offsetand Sensitivity and Associated Temperature
12-Bit Parallel Digital Output
Analog Output
Compensates a Wide Range of Sensor Sensitivityand Offset
Single-Shot Automated CompensationAlgorithm-No Iteration Required
Built-In Temperature Sensor
Three-State, 5-Wire Serial Interface SupportsHigh-Volume Manufacturing

MAX1460 Typical Application

Hand-Held Instruments
Piezoresistive Pressure and Acceleration
Transducers and Transmitters
Industrial Pressure Sensors and 420mA
Transmitters
Smart Battery Charge Systems
Weigh Scales and Strain-Gauge Measurement
Flow Meters
Dive Computers and Liquid-Level Sensing
Hydraulic Systems
Automotive Systems

MAX1460 Connection Diagram

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