Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Analog Front-End IC for Automotive Battery Sensor

차량 배터리 센서용 Analog Front-End IC 설계

  • Yeo, Jae-Jin (Dep. of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang Univ.) ;
  • Jeong, Bong-Yong (Dep. of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang Univ.) ;
  • Roh, Jeong-Jin (Dep. of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang Univ.)
  • Received : 2011.06.30
  • Accepted : 2011.10.10
  • Published : 2011.10.25
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Abstract

This paper presents the design of the battery sensor IC for instrumentation of current, voltage using delta-sigma ADC. The proposed circuit consists of programmable gain instrumentation amplifier (PGIA) and second-order discrete-time delta-sigma modulator with 1-bit quantization were fabricated by a 0.25 ${\mu}m$ CMOS technology. Design circuit show that the modulator achieves 82 dB signal-to-noise ratio (SNR) over a 2 kHz signal bandwidth with an oversampling ratio (OSR) of 256 and differential nonlinearity (DNL) of ${\pm}$ 0.3 LSB, integral nonlinearity (INL) of ${\pm}$ 0.5 LSB. Power consumption is 4.5 mW.

본 논문에서는 배터리의 전류, 전압을 측정하기 위한 analog front-end IC 를 설계 하였다. 회로는 크게 programmable gain instrumentation amplifier (PGIA)와 델타-시그마 모듈레이터로 구성 되어 있다. 델타-시그마 모듈레이터는 2차 단일 비트 구조이고 0.25 ${\mu}m$ CMOS 공정을 사용 하였다. 설계된 회로는 오버 샘플링 비율이 256일 때 2 kHz 신호 대역에서 signal-to-noise ratio (SNR)는 82 dB 의 성능을 가지고, differential nonlinearity (DNL)은 ${\pm}$ 0.3 LSB (16bit 기준), integral nonlinearity (INL)은 ${\pm}$ 0.5 LSB 이다. 전체 소비 전력은 4.5 mW 이다.

Keywords

References

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