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DEMOD-DC®

DEMOD-DC®

Carrier Amplifier-Oscillator/Demodulator for DVRTs®; Inductive, Capacitive and Resistive Bridge Circuits.

Overview

Advanced microelectronics are packed within a miniature connector to provide complete conditioning of MicroStrain's DVRT® sensors.

The DEMOD-DC® makes inductive position sensors as easy to use as a potentiometer. With integral signal-conditioning electronics, the user connects power, ground and analog out, and the DEMOD-DC® outputs a voltage proportional to linear position.

The high-level analog-output voltage is digitally trimmed under microprocessor control during the manufacturing process. This insures that every DVRTs® offset and gain values match one another. This allows DVRTs® to be used interchangeably in industrial automation and OEM applications.

DEMOD-DC® cards will operate from a wide range of DC excitation voltages. They feature an input supply line that is internally regulated and reverse input protected, as well as a buffered, high-frequency response analog-output voltage.

How it works

Operating from a DC power supply, the DEMOD-DC® filters incoming transients from the line voltage, and supplies a sine wave excitation to the transducer. This excitation is used to measure minute impedance changes of the sensing elements.

Precision demodulator components provide rectification and differential amplification. Digital trimming insures conformity from sensor to sensor. The analog output is filtered and buffered to provide clean, high level signals.

Demod-DC Signal Conditioner
Applications
  • Sensor type is inductive
  • Gain is factory adjustable from 10 – 10,000
  • Recommended warm up time is 30 seconds
  • Operating temperature range is -40°C to 85°C
  • Demodulation is asynchronous, DC output
  • Operating temperature is -40°C to 85°C
  • PC board size is 50 mm x 20 mm x 10 mm

Electrical and Mechanical Specifications

 

Sensor Types Inductive (DVRTs®)
Excitation Regulated sinewave, 150 kHz standard
Demodulation Asynchronous, DC output
Output 0 to 5 V typical, digitally trimmed
Gain Factory adjustable from 10 to 10,000
Low Pass Filter 2 pole, 3 dB down @ 800 Hz standard; Factory adjustable 10 Hz-20 kHz
Supply Voltage + 6.0 to + 16 volts DC
Supply Current 22 milliamps
Warm-up Time 30 seconds recommended
Operating Temperature -40 to 85 degrees Celsius
Enclosure Size 50 mm x 20 mm x 10 mm
Connections Power, ground, analog ouput
Connector Micro-D (MIL-C-83513/5) mating connector included

Patents Pending

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How To Order

To discuss configuration for your specific system requirements, please contact sales at sales@microstrain.com or call  802-862-6629.

For large quantity orders or OEM discussions, please contact mirobinson@microstrain.com.

If you are outside the US, please contact one of our distributors.