MAXIM MAX21000 惯性传感器参考设计方案

MAXIM公司的MAX21000是一款实现低功耗、低噪音、3轴角速度传感器，具有史无前例的精度、温度和时间的灵敏性。最低功耗特性可以使该芯片工作在最低1.71V电压，该芯片主要由传感器元件和IC接口两部分组成，传感器部分用于测量角速度，数字接口实现与外围数据的传输接口。本文首先介绍芯片的简介、特性、内部框图及应用领域，并给出相应设计方案的设计原理图、元器件列表及PCB元件布局图。
The MAX21000 is a low power, low noise, 3-axis angular rate sensor that delivers unprecedented accuracy and sensitivity over temperature and time. It operates with a supply voltage as low as 1.71V for minimum power consumption. It includes a sensing element and an IC interface that provides the measured angular rate to the external world through a digital interface (I2C/SPI).
The IC has a full scale of ±31.25/±62.50/±125/±250/ ±500/±1k/±2k degrees per second (dps) and measures rates with a finely tunable user-selectable bandwidth. The high ODR and the large BW, the low noise at highest FS, together with the low phase delay, make the IC suitable for both user interface (UI) and optical image stabilization (OIS) applications.
The IC is a highly integrated solution available in a com­pact 3mm x 3mm x 0.9mm plastic land grid array (LGA) package and does not require any external components other than supply bypass capacitors. It can operate over the -40ºC to +85ºC temperature range.
MAX21000主要特性：
● Minimum Overall Footprint
• Industry’s Smallest and Thinnest Package for Portable Devices (3mm x 3mm x 0.9mm LGA)
• No external components
● Unique Low-Power Capabilities
• Low Operating Current Consumption (5.4mA typ)
• Eco Mode Available at 100Hz with 3.0mA (typ)
• 1.71V (min) Supply Voltage
• Standby Mode Current 2.7mA (typ)
• 9μA (typ) Power-Down Mode Current
• High PSRR and DC-DC Converter Operation
• 45ms Turn-On Time from Power-Down Mode
• 5ms Turn-On Time from St...