Bullet Sensors & Transducers e-Digest, Vol. 86, Issue 12, December 2007: Product News

    (ISSN 1726- 5479)


Editorial Calendar 2007

Editorial Board

Submit an Article or Press Release

10 Top Sensors Products of 2007

Sensors & Transducers Journal 2006

Endevco logo

Top 25 Downloaded Article

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents



Novel Variable Capacitance Accelerometer Featuring Onboard, Microprocessor-Based Temperature Compensation


Endevco Corporation has announced introduction of the Endevco model 7290D variable capacitance accelerometer with onboard, microprocessor-based temperature compensation. It is designed to provide very high thermal stability and global accuracy required for measurement of relatively low-level accelerations in laboratory test and measurement, automotive and aerospace applications including both military and commercial flight testing.


Patented by Endevco, typical applications for the new model 7290D require measurement of whole body motion immediately after the accelerometer is subjected to a shock motion and in the presence of severe vibration inputs. Gas damping and internal over-range stops enable its anisotropically etched, silicon sensing element to withstand high shock and acceleration loads. The use of gas damping in the sensing element also results in very small thermally induced changes in frequency response.


With its onboard, microprocessor-based temperature compensation, the model 7290D delivers 2.5% total dynamic accuracy over the entire military spec temperature range of -550C to +125 0C. Total dynamic accuracy is defined as the root of the sum of the squares of thermal sensitivity shift, non-linearity and hysteresis, and transverse sensitivity.


Custom signal conditioning enables the model 7290D to operate with a nominal excitation of 8.0 Vdc to 30.0 Vdc and provides a high-level, low-impedance output. The 2.25 V differential output (single-ended output optional) is DC coupled at a DC bias of approximately 2.5 V.


In order to maintain stringent thermal characteristics and high accuracy, a custom ASIC provides factory programmable temperature compensation. All compensation and adjustments are incorporated within the accelerometer and no post-processing is required. The compensation is accomplished via a five-point, piecewise, linear fit algorithm for both thermal sensitivity shift (TSS) and thermal zero shift (TZS). A Transducer Electronic Data Sheet (TEDS) conforming to IEEE 1451.4 has been included to store serial number and calibration information.





Yeni Hoo

Marketing Communications Supervisor

Endevco Corporation

Tel.: 949-493-8181x242

E-mail: yeni.hoo@endevco.com

Accelerometer 729D





Read more about accelerometers



Back to S&T e-Digest page


1999 - 2007 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.