This paper presents a ±2A fully-integrated current sensor with a 20 mΩ on-chip shunt (resistor). It employs an energy-efficient hybrid sigma-delta ADC with an FIR-DAC and consumes only 1.4 μA, a 3× improvement on the state-of-the-art. A tunable analog non-linear temperature-compensation scheme (TCS) allows ±2A currents to be digitized with 0.35% gain error from-40 to 85°C. With a 3 mΩ PCB shunt, ±15A currents can be digitized with slightly more (0.6%) gain error. In a 0.18 μm CMOS process, the sensor occupies 1.6 mm2.
|Title of host publication||2021 Symposium on VLSI Circuits|
|Place of Publication||Piscataway|
|Number of pages||2|
|Publication status||Published - 2021|
|Event||2021 Symposia on VLSI Technology and VLSI Circuits - Virtual at Kyoto, Japan|
Duration: 13 Jun 2021 → 19 Jun 2021
|Conference||2021 Symposia on VLSI Technology and VLSI Circuits|
|City||Virtual at Kyoto|
|Period||13/06/21 → 19/06/21|
Bibliographical noteGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
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