Sensor Conditioning with Rejustors
Signal Conditioning corrects for errors inherent in the sensor element. The Microbridge approach starts with an extremely linear sensing element and thus eliminates much of the complexity of the conditioning circuitry. By using Rejustor technology, our stand alone signal conditioning chips can tackle the most difficult challenges and produce accurate and reliable signals in the analog domain. Some applications are: Gas detectors, Pressure sensors, Flow sensors, etc.
MBSTC-02 A/B Analog Amplifier/Sensor Conditioner with Integrated Temperature Correction
The MBSTC-02A/B is an analog adjustable sensor conditioner with integrated temperature correction for use
with Piezo-resistive bridge sensors. It is intended for differential (DIF) or absolute (ABS) sensors. Nominal
adjustable gain values are 23 and 46 for DIF and ABS sensors, respectively. Nominal (adjustable) offset values are
±10mV/V referred to input. MBSTC-02A adjusts TC-span (Gain) for sensors with TC-sensitivity between -900ppm/K
to -1900ppm/K. MBSTC-02B adjusts TC-span for sensors with TC-sensitivity between -1700ppm/K to 2700ppm/K(2).
| Part Number [PDF Download] | Description | TC-Gain (ppm/K) | Order Code | Package |
|---|---|---|---|---|
| MBSTC-02A/B | Analog Amplifier/Sensor | 900 to 1900/1700 to 2700 | 7113/7115 | QFN-24 |
| MBFC-01 | Sensor Alarm Compensator | — | — | QFN-24 |
eTC Rejustors
The eTC Rejustor provides the next-generation solution for passive calibration and temperature compensation. eTC
Rejustors are passive resistive devices with adjustable resistance and TCR (temperature coefficient of resistance).
These devices are used not only to correct for variation in offset, but also for variation in temperature sensitivity
and drift. eTC Rejustors are typically used in circuit applications where high precision and temperature stability
is required and the exact value of the desired resistance and temperature correction factor depends on variation
in other circuit components — for example, batch-to-batch or unit-to-unit manufacturing variations, or
where packaging-induced stresses cause significant changes in electrical output.
The ohmic value and TCR (Temperature Coefficient of Resistance) of an eTC Rejustor can be adjusted independently. Both resistance and TCR can be adjusted many times using analog signals. Once adjusted these parameters hold their final value indefinitely, unless they are re-adjusted.
| Part Number [PDF Download] |
Ratio | Resistance Range R1 |
Resistance Range R2 |
SOIC Order Code |
QFN Order Code |
|---|---|---|---|---|---|
| MBT-303-A | 1:1 | 21k - 30k | 21k - 30k | 112R | 112L |
| MBW-303 | 1:1:1:1 | R1, R2, R3, R4 = 21k - 30k | - | 5111 | |
| MBT-143-E | 1:9 | 8.4k-14k | 75.6k-126k | 112T | 112P |
eTC App Note (PDF 354K)