MAX1458
1% Accurate, Digitally Trimmed Sensor Signal Conditioner
Industry's Smallest Pressure Sensor Signal Conditioner
Part Details
- Medium Accuracy (±1%), Single-Chip Sensor Signal Conditioning
- Sensor Errors Trimmed Using Correction Coefficients Stored in Internal EEPROM- Eliminates the Need for Laser Trimming and Potentiometers
- Compensates Offset, Offset-TC, FSO, FSOTC, FSO Linearity
- Programmable Current Source (0.1mA to 2.0mA) for Sensor Excitation
- Fast Signal-Path Settling Time (< 1ms)
- Accepts Sensor Outputs from 10mV/V to 40mV/V
- Fully Analog Signal Path
The MAX1458 highly integrated analog-sensor signal processor is optimized for piezoresistive sensor calibration and compensation without any external components. It includes a programmable current source for sensor excitation, a 3-bit programmable-gain amplifier (PGA), a 128-bit internal EEPROM, and four 12-bit DACs. Achieving a total error factor within 1% of the sensor's repeatability errors, the MAX1458 compensates offset, offset temperature coefficient, full-span output (FSO), FSO temperature coefficient (FSOTC), and FSO nonlinearity of silicon piezoresistive sensors.
The MAX1458 calibrates and compensates first-order temperature errors by adjusting the offset and span of the input signal via digital-to-analog converters (DACs), thereby eliminating quantization noise. Built-in testability features on the MAX1458 result in the integration of three traditional sensor-manufacturing operations into one automated process:
Although optimized for use with piezoresistive sensors, the MAX1458 may also be used with other resistive sensors (i.e., accelerometers and strain gauges) with some additional external components.
Applications
- Hydraulic Systems
- Manifold Absolute Pressure (MAP) Sensors
- Piezoresistive Pressure and Acceleration
- Transducers and Transmitters
Documentation
Data Sheet 1
Application Note 1
Technical Articles 1
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Product 1 | ||
| MAX1450 | Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors | |
Latest Discussions
No discussions on max1458 yet. Have something to say?
Start a Discussion on EngineerZone®