System corrects for assembly variations

The MBW-303 allows sensor offset calibration and temperature compensation after final assembly, which negates all cumulative errors associated with the assembly processes

Microbridge Technologies has released the MBW-303 Wheatstone Bridge Offset Conditioning Network.

It is comprised of four eTC rejustors (re-adjustable resistors), and is the world's first fully analogue, passive electronic temperature compensation (eTC) divider configured in a bridge.

Designed for Wheatstone bridge sensors in automotive, healthcare, consumer and instrumentation markets, this single chip solution compensates for offset errors and offset drift in a Wheatstone bridge, solving the problem at the source.

The MBW-303 simplifies the design process, allowing sensor offset calibration and temperature compensation after final assembly, which negates all cumulative errors associated with the assembly processes.

Dynamic adjustment provides cost and labour savings and the network's re-adjustability reduces re-work.

"We recognised that many of our rejustor devices have been targeted by customers for sensor calibration and compensation applications", said Nick Tasker, Vice President, Business Development at Microbridge.

"This device represents the next step in device integration for these applications".

"There is a need for higher and higher precision and integration".

"If precision cannot be maintained over the entire operating temperature range of the sensor, it really isn't precise".

"The MBW 303 maintains offset precision over the full operating temperature range".

The MBW-303 enables adjustment and verification to be performed in a single temperature cycle.

It can operate in temperatures ranging from -40C to +150.

In addition, it has a small footprint for high-density applications, doesn't require power or memory to hold calibration and doesn't require an external temperature sensor.

The MBW-303 enables precision electrical in-circuit adjustment for ohmic and temperature correcting offset errors.

The adjustment process is isolated from the circuit, allowing true, passive in-circuit calibration and compensation.

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