MAS6503 24位低功耗压阻式传感器信号接口IC

  • 低待机电流消耗 10 nA(典型值)
  • 极低的电源电流:0.9 μA…18.3 μA(典型值)
  • 电源电压:1.8 V…3.6 V
  • 比例ΔΣ转换
  • 可选输入信号范围 (VDD=2.7V):373、252、172 和 115 mVPP
  • 可选的可选偏移 (VDD=2.7V):±126、±86、±57 和 ±40 mV
  • 可选传感器电阻值 2、2.5、3、3.5、4、4.5、5 和 10kΩ
  • 过采样率:4096、2048、1024、512和256
  • 内部系统时钟信号 250 kHz
  • 转换时间 1.41 ms…16.77 ms 典型值
  • 2 线串行数据接口(I2C 总线)
  • 256 位 EEPROM 存储器
  • ΔΣ 架构带来良好的噪声性能
  • VDD 监控模式

MAS6503-1

详细描述

MAS6503 采用比例式 AD 转换器原理,采用 delta-sigma (DS) 转换技术,具有非常好的噪声性能。其电流消耗极低(18.3 μA,在最大分辨率下每秒进行一次压力转换,包括传感器电桥电流),并且可以在 1.8 V 至 3.6 V 的低电源电压下运行,这使其成为连接压电器件的理想解决方案。功耗关键的便携式应用中的电阻传感器。ADC 的有效位数 (ENOB) 为 17.4 位。DS 转换器的过采样率 (OSR) 有五个值可供选择,以进一步优化转换精度、速度和电流消耗。MAS6503 还具有电源电压监控模式,这在电池供电系统中尤其有用。使用内置传感器采样开关,外部传感器桥不仅可用于检测压力,还可用于检测温度。MAS6503 通过标准的 2 线 I2C 串行总线接口进行通信。

The MAS6503 uses a ratiometric AD-converter principle employing a delta-sigma (DS) conversion technique, giving very good noise performance. Its current consumption is extremely low (18.3 μA, one pressure conversion in a second at maximum resolution and including sensor bridge current) and it can operate at low supply voltage from 1.8 V to 3.6 V which makes it an ideal solution for interfacing a piezo-resistive sensor in power consumption critical portable applications. The effective number of bits (ENOB) of the ADC is 17.4 bits. The over sampling ratio (OSR) of the DS-converter has five values to choose from for further optimization between conversion accuracy, speed and current consumption. MAS6503 also features supply voltage monitoring mode which is especially useful in battery operated systems. The external sensor bridge can be used to sense not only pressure but also temperature, using the built-in sensor sampling switches. The MAS6503 communicates via a standard 2-wire I2C serial bus interface.

规格书和资料

Data SheetPress release