高度计用高分辨率气压模块MS5611剖析.pdf

MS5611-01BA03 Variometer Module, with stainless steel cap • High resolution module, 10 cm • Fast conversion down to 1 ms • Low power, 1 µA (standby 0.15 µA) • QFN package 5.0 x 3.0 x 1.0 mm3 • Supply voltage 1.8 to 3.6 V • Integrated digital pressure sensor (24 bit Σ ADC) • Operating range: 10 to 1200 mbar, -40 to +85 °C 2 • I C and SPI interface up to 20 MHz • No external components (Internal oscillator) • Excellent long term stability DESCRIPTION The MS5611-01BA is a new generation of high resolution altimeter sensors from MEAS Switzerland with SPI 2 and I C bus interface. It is optimized for altimeters and variometers with an altitude resolution of 10 cm. The sensor module includes a high linearity pressure sensor and an ultra low power 24 bit Σ ADC with internal factory calibrated coefficients. It provides a precise digital 24 Bit pressure and temperature value and different operation modes that allow the user to optimize for conversion speed and current consumption. A high resolution temperature output allows the implementation of an altimet