Power Consumption in Direct Interface Circuits
Power Consumption in Direct Interface Circuits
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DOI：
10.1109/tim.2012.2216473
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发表时间：
2013-02-01
影响因子：
5.6
通讯作者：
Reverter, Ferran
中科院分区：
文献类型：
--
作者：
Reverter, Ferran
本文从理论上和实验上分析了直接接口电路（即传感器直接连接到微控制器（μC）而不使用信号调理电路或模数转换器的电路）中的电流消耗。理论分析考虑了 muC 内部电子器件和外部元件消耗的电流，提出了估计活动模式下平均电流消耗的公式。估计值与 AVR ATtiny2313 mu C 在不同操作条件下进行的实验测试中获得的值相当一致。例如，在 3 V-4 MHz 的主动模式下，测量 1-k Omega 电阻传感器的电流消耗约为 1.5 mA，测量 177-pF 电容传感器的电流消耗约为 0.6 mA。本文报告的结果预计可用于电池供电测量系统的直接接口电路的设计。
This paper analyzes theoretically and experimentally the current consumption in direct interface circuits, i.e., circuits in which the sensor is directly connected to a microcontroller (mu C) without using either a signal conditioning circuit or an analog-to-digital converter. The theoretical analysis, which takes into account the current consumed by both the internal electronics of the mu C and the external components, proposes formulas to estimate the average current consumption in active mode. The estimated values fairly agree with those obtained in the experimental tests carried out by an AVR ATtiny2313 mu C at different operating conditions. For example, the current consumption in active mode at 3 V-4 MHz was about 1.5 mA for the measurement of a 1-k Omega resistive sensor and 0.6 mA for the measurement of a 177-pF capacitive sensor. The results reported herein are expected to be useful for the design of direct interface circuits intended for battery-powered measurement systems.