A miniature digital current sensor with differential Hall probes using enhanced chopping techniques and mechanical stress compensation
A 10kHz bandwidth 50Amax current sensor using a Hall effect gradiometer without magnetic core provides 80kHz update rate with a digital interface. Very low un-calibrated offset of 30mA (1σ) and after calibration typical 10mA over temperature is accomplished by a chopped multi-bit feedback continuous...
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| creator | Motz, M. Ausserlechner, U. Bresch, M. Fakesch, U. Schaffer, B. Reidl, C. Scherr, W. Pircher, G. Strasser, M. Strutz, V. |
| description | A 10kHz bandwidth 50Amax current sensor using a Hall effect gradiometer without magnetic core provides 80kHz update rate with a digital interface. Very low un-calibrated offset of 30mA (1σ) and after calibration typical 10mA over temperature is accomplished by a chopped multi-bit feedback continuous-time 3rd order ΔΣ-ADC. This also realizes low noise of 13mA rms in 1kHz signal bandwidth. The ADC uses enhanced chopping techniques and additional digital feedback loops to avoid chopper ripple. New analog and digital stress-compensation circuits with lateral and vertical n-doped resistors achieve lifetime gain drifts below 1% and temperature compensation. Auto-zeroing ping-pong comparators offer a fast over-current detection of 1...2μs on a dedicated output pin. The monolithic integrated sensor chip and the 4kV galvanic isolated current rail fit into a very small 7×7×1mm 3 package. |
| doi_str_mv | 10.1109/ICSENS.2012.6411161 |
| format | Conference Proceeding |
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The monolithic integrated sensor chip and the 4kV galvanic isolated current rail fit into a very small 7×7×1mm 3 package.</description><subject>Choppers (circuits)</subject><subject>Current measurement</subject><subject>Magnetic cores</subject><subject>Resistors</subject><subject>Stress</subject><subject>Temperature measurement</subject><subject>Temperature sensors</subject><issn>1930-0395</issn><issn>2168-9229</issn><isbn>9781457717666</isbn><isbn>1457717662</isbn><isbn>9781457717659</isbn><isbn>9781457717673</isbn><isbn>1457717654</isbn><isbn>1457717670</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2012</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNpVUElOwzAUNZNEKT1BN75Air8d2_GyqgqtVMGi3Veuh8YocUKcCHEBzk0q2LD6etN_0kNoDmQBQNTTdrVfv-4XlABdiBwABFyhmZIF5FxKkIKrazShIIpMUapu_mlC3KIJKEYywhS_Rw8pvRNCCafFBH0vcR1i0P3QOWzDOfS6wmboOhd7nFxMTYc_Q1-OmvfuwobRsNFVhduuObmEhxTiGbtY6micxaZs2vbC9M6UMXwMo0VHi-sR6hjMmE5951LCpqnbsUD3oYmP6M7rKrnZ352iw_P6sNpku7eX7Wq5y4IifaaJ0R5UoY0lXlqmc8gN17njXhaOMw0SDKFsHIIT4b09CWm5t4ZyMObE2BTNf98G59yx7UKtu6_j36LsB1cFank</recordid><startdate>201210</startdate><enddate>201210</enddate><creator>Motz, M.</creator><creator>Ausserlechner, U.</creator><creator>Bresch, M.</creator><creator>Fakesch, U.</creator><creator>Schaffer, B.</creator><creator>Reidl, C.</creator><creator>Scherr, W.</creator><creator>Pircher, G.</creator><creator>Strasser, M.</creator><creator>Strutz, V.</creator><general>IEEE</general><scope>6IE</scope><scope>6IH</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIO</scope></search><sort><creationdate>201210</creationdate><title>A miniature digital current sensor with differential Hall probes using enhanced chopping techniques and mechanical stress compensation</title><author>Motz, M. ; Ausserlechner, U. ; Bresch, M. ; Fakesch, U. ; Schaffer, B. ; Reidl, C. ; Scherr, W. ; Pircher, G. ; Strasser, M. ; Strutz, V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i90t-a0caf198acd0f7d3a414c5a4e5f78e53a171c023216506ffdb67d5fdc251ccb33</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Choppers (circuits)</topic><topic>Current measurement</topic><topic>Magnetic cores</topic><topic>Resistors</topic><topic>Stress</topic><topic>Temperature measurement</topic><topic>Temperature sensors</topic><toplevel>online_resources</toplevel><creatorcontrib>Motz, M.</creatorcontrib><creatorcontrib>Ausserlechner, U.</creatorcontrib><creatorcontrib>Bresch, M.</creatorcontrib><creatorcontrib>Fakesch, U.</creatorcontrib><creatorcontrib>Schaffer, B.</creatorcontrib><creatorcontrib>Reidl, C.</creatorcontrib><creatorcontrib>Scherr, W.</creatorcontrib><creatorcontrib>Pircher, G.</creatorcontrib><creatorcontrib>Strasser, M.</creatorcontrib><creatorcontrib>Strutz, V.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan (POP) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE/IET Electronic Library</collection><collection>IEEE Proceedings Order Plans (POP) 1998-present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Motz, M.</au><au>Ausserlechner, U.</au><au>Bresch, M.</au><au>Fakesch, U.</au><au>Schaffer, B.</au><au>Reidl, C.</au><au>Scherr, W.</au><au>Pircher, G.</au><au>Strasser, M.</au><au>Strutz, V.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>A miniature digital current sensor with differential Hall probes using enhanced chopping techniques and mechanical stress compensation</atitle><btitle>2012 IEEE Sensors</btitle><stitle>ICSENS</stitle><date>2012-10</date><risdate>2012</risdate><spage>1</spage><epage>4</epage><pages>1-4</pages><issn>1930-0395</issn><eissn>2168-9229</eissn><isbn>9781457717666</isbn><isbn>1457717662</isbn><eisbn>9781457717659</eisbn><eisbn>9781457717673</eisbn><eisbn>1457717654</eisbn><eisbn>1457717670</eisbn><abstract>A 10kHz bandwidth 50Amax current sensor using a Hall effect gradiometer without magnetic core provides 80kHz update rate with a digital interface. Very low un-calibrated offset of 30mA (1σ) and after calibration typical 10mA over temperature is accomplished by a chopped multi-bit feedback continuous-time 3rd order ΔΣ-ADC. This also realizes low noise of 13mA rms in 1kHz signal bandwidth. The ADC uses enhanced chopping techniques and additional digital feedback loops to avoid chopper ripple. New analog and digital stress-compensation circuits with lateral and vertical n-doped resistors achieve lifetime gain drifts below 1% and temperature compensation. Auto-zeroing ping-pong comparators offer a fast over-current detection of 1...2μs on a dedicated output pin. The monolithic integrated sensor chip and the 4kV galvanic isolated current rail fit into a very small 7×7×1mm 3 package.</abstract><pub>IEEE</pub><doi>10.1109/ICSENS.2012.6411161</doi><tpages>4</tpages></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | ISSN: 1930-0395 |
| ispartof | 2012 IEEE Sensors, 2012, p.1-4 |
| issn | 1930-0395 2168-9229 |
| language | eng |
| recordid | cdi_ieee_primary_6411161 |
| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Choppers (circuits) Current measurement Magnetic cores Resistors Stress Temperature measurement Temperature sensors |
| title | A miniature digital current sensor with differential Hall probes using enhanced chopping techniques and mechanical stress compensation |
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