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MAX1450
Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors
Digitally Compensates Sensors to 1% Accuracy
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Status
Active: In Production.
Description
The MAX1450 sensor signal conditioner is optimized for
piezoresistive sensor calibration and temperature compensation. It includes an adjustable current source for sensor excitation and a 3-bit programmable-gain amplifier (PGA). Achieving a total typical error factor within 1% of the sensor's inherent repeatability errors, the MAX1450 compensates offset, full-span output (FSO), offset tempco, FSO tempco, and FSO nonlinearity of silicon piezoresistive sensors via external trimmable resistors, potentiometers, or digital-to-analog converters (DACs).
The MAX1450 is capable of compensating sensors that display close error distributions with a single temperature point, making it ideal for low-cost, medium-accuracy applications. Although optimized for use with popular piezoresistive sensors, it may also be used with other resistive sensor types such as strain gauges.
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Data Sheet
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An evaluation kit is available: MAX1450EVKIT
Key Features
- 1% Sensor Signal Conditioning
- Corrects Sensor Errors Using Coefficients Stored in External Trimmable Resistors, Potentiometers, or DACs
- Compensates Offset, Offset TC, FSO, FSO TC, and FSO Linearity
- Rail-to-Rail Analog Output
- Programmable Current Source for Sensor Excitation
- Fast Signal-Path Settling Time (< 1ms)
- Accepts Sensor Outputs from 10mV/V to 30mV/V
- Fully Analog Signal Path
- Contains PGA, current source
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Applications/Uses
- Automotive Electronics
- Hydraulic Systems
- Manifold Absolute Pressure (MAP) Sensors
- Piezoresistive Pressure and Acceleration Transducers and Transmitters
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Key Specifications:
| Sensor Signal Conditioners |
| Part Number |
Sensing Element |
PGA Gain |
Calibration Method |
Accuracy
(%FSO) |
Output Type |
ICC
(mA) |
IBRIDGE
(mA) |
VSUPPLY
(V) |
| max |
typ |
| MAX1450 |
| PRT | | Resistive Bridge | | Strain Gauge |
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39 to 221 (8 gains) |
External trimmable resistor |
1 |
Analog |
2.8 |
0.1 to 2.0 |
4.5 to 5.5 |
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See All Sensor Signal Conditioners (10)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Functional Diagram
Application Notes
Product Guides
Reliability Reports
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Software/Models
Ordering Information
This product cannot be purchased through our web site. Contact factory for availability.
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Similar Products by Function
| MAX1455 |
Low-Cost Automotive Sensor Signal Conditioner |
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Evaluation Kits
Didn't Find What You Need?
Information Index
Document Ref.: 19-1365
Rev 1;
2005-09-08
This page last modified: 2009-11-05
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