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A 2nd Order Delta-Sigma ADC for Pressure Sensor Interface

机译:用于压力传感器接口的第二阶Delta-Sigma ADC

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A second order delta-sigma analog-to-digital converter (ADC) including a bandgap reference, a bias circuit for sensor, and a digital filter for the interface of piezoresistive pressure sensor is presented. The proposed sensor interface circuit is designed to target a pressure range from 0 to 100 psi. The prototype sensor interface circuit is implemented in a 0.35 □m CMOS process. The single-loop, 1-bit, second-order delta-sigma ADC operates at OSR of 256 achieves 80.5 dB dynamic range (DR), 79.6 dB peak signal-to-noise ratio (SNR), and 74.4 dB peak signal-to-noise and distortion ratio (SNDR) over a signal bandwidth of 7.8 kHz with 3.3V supply while consuming 0.33mW including on-chip reference and bias current for sensor, (in Performance Summary: 0.95mW)
机译:呈现包括带隙参考的二阶Δ-Σ模数转换器(ADC),给出了传感器的偏置电路,以及压阻式压力传感器接口的数字滤波器。所提出的传感器接口电路设计用于瞄准0至100psi的压力范围。原型传感器接口电路在0.35□M CMOS工艺中实现。单环,1位,二阶Δ-sigma ADC在OSR为256的操作达到80.5 dB动态范围(DR),79.6dB峰值信噪比(SNR)和74.4 dB峰值信号 - 到-Noise和失真率(SNDR)在7.8kHz的信号带宽,3.3V电源,同时消耗0.33MW,包括片上的传感器和偏置电流,(在性能摘要:0.95MW中)

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