차량 배터리 센서용 Analog Front-End IC 설계

초록

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 ㎛ CMOS technology. Design circuit show that the modulator achieves 82 ㏈ signal-to-noise ratio (SNR) over a 2 ㎑ signal bandwidth with an oversampling ratio (OSR)of 256 and differential nonlinearity (DNL) of ± 0.3 LSB, integral nonlinearity (INL) of ± 0.5 LSB. Power consumption is 4.5 ㎽.

키워드