MAS6513 电容式传感器信号调节器 IC

MAS6513 是一种电容传感器信号调节器 IC，能够连接单电容传感器和双电容传感器。它使用 24 位电容数字转换器，该转换器采用 delta-sigma (ΔΣ) 转换技术。输出可以与电容差值、比率或总和成正比。除了电容测量外，该设备还具有温度传感器，能够测量 -40°C ... +125°C 的宽温度范围。内置 24 位计算引擎产生校准的高分辨率输出，其可包括传感器电容值的高达 3 阶线性化和 2 阶温度补偿以及片上温度传感器信号的高达 2 阶线性化。该器件包括一个 512 位 EEPROM 存储器，用于在片上存储电容传感器前端微调值和校准系数。

该 IC 旨在满足低功耗要求，因此使其成为电池供电系统的理想选择。可以实现低至 0.77μA @ 1Hz 转换率的平均电流消耗。有七种不同的过采样率 (OSR) 选项可用于电容和温度测量，从而可以优化分辨率、转换速度和电流消耗。

MAS6513 可以基于命令（一次性模式）或自动（连续模式）运行测量。可选的中断输出可配置为在新结果可用或任何结果超出可编程警报限制时发出中断。

MAS6513 提供裸片和小型 DFN-12 3x3x0.75 mm 封装。

MAS6513 is a capacitive sensor signal conditioner IC, capable to interface both single and dual capacitance sensors. It uses a 24-bit Capacitance-to-Digital Converter, which employs a delta-sigma (ΔΣ) conversion technique. The output can be proportional to capacitance difference, ratio or sum. In addition to capacitance measurement the device has temperature sensor which is capable of measuring temperature in wide -40°C … +125°C temperature range. Built-in 24-bit calculation engine produces calibrated high-resolution output which can comprise of up to 3rd order linearization and 2nd order temperature compensation of sensor capacitance value and up to 2nd order linearization of the on-chip temperature sensor signal. The device includes a 512-bit EEPROM memory for storing capacitive sensor front-end trim values and calibration coefficients on-chip. 184 bits are left free for any other use.

The IC is designed to meet the requirement for low power consumption, thus making it an ideal choice for battery powered systems. Average current consumption down to 0.77μA @ 1Hz conversion rate can be achieved. There are seven different oversampling ratio (OSR) options available for both capacitance and temperature measurement which makes it possible to optimize resolution, conversion speed and current consumption.

The MAS6513 can run measurements either command based (One shot mode) or automatically (Continuous mode). Optional interrupt output can be configured to given an interrupt when new results are available or when any result has exceeded programmable alert limits.

The MAS6513 is available as dies and in a small DFN-12 3x3x0.75 mm package.