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Sensors 2018, 18(5), 1555; https://doi.org/10.3390/s18051555

Design of a Low-Power, Small-Area AEC-Q100-Compliant SENT Transmitter in Signal Conditioning IC for Automotive Pressure and Temperature Complex Sensors in 180 Nm CMOS Technology

1
College of Information and Communication Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
2
School of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
*
Author to whom correspondence should be addressed.
Received: 15 April 2018 / Revised: 11 May 2018 / Accepted: 11 May 2018 / Published: 14 May 2018
(This article belongs to the Section Physical Sensors)

Abstract

In this paper, a low-power and small-area Single Edge Nibble Transmission (SENT) transmitter design is proposed for automotive pressure and temperature complex sensor applications. To reduce the cost and size of the hardware, the pressure and temperature information is processed with a single integrated circuit (IC) and transmitted at the same time to the electronic control unit (ECU) through SENT. Due to its digital nature, it is immune to noise, has reduced sensitivity to electromagnetic interference (EMI), and generates low EMI. It requires only one PAD for its connectivity with ECU, and thus reduces the pin requirements, simplifies the connectivity, and minimizes the printed circuit board (PCB) complexity. The design is fully synthesizable, and independent of technology. The finite state machine-based approach is employed for area efficient implementation, and to translate the proposed architecture into hardware. The IC is fabricated in 1P6M 180 nm CMOS process with an area of (116 μm × 116 μm) and 4.314 K gates. The current consumption is 50 μA from a 1.8 V supply with a total 90 μW power. For compliance with AEC-Q100 for automotive reliability, a reverse and over voltage protection circuit is also implemented with human body model (HBM) electro-static discharge (ESD) of +6 kV, reverse voltage of −16 V to 0 V, over voltage of 8.2 V to 16 V, and fabricated area of 330 μm × 680 μm. The extensive testing, measurement, and simulation results prove that the design is fully compliant with SAE J2716 standard. View Full-Text
Keywords: AEC-Q100; automotive; CMOS; low-power; pressure sensor; SAE J2716; single edge nibble transmission (SENT); signal conditioning IC; temperature sensor AEC-Q100; automotive; CMOS; low-power; pressure sensor; SAE J2716; single edge nibble transmission (SENT); signal conditioning IC; temperature sensor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ali, I.; Rikhan, B.S.; Kim, D.-G.; Lee, D.-S.; Rehman, M.R.U.; Abbasizadeh, H.; Asif, M.; Lee, M.; Hwang, K.C.; Yang, Y.; Lee, K.-Y. Design of a Low-Power, Small-Area AEC-Q100-Compliant SENT Transmitter in Signal Conditioning IC for Automotive Pressure and Temperature Complex Sensors in 180 Nm CMOS Technology. Sensors 2018, 18, 1555.

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