MT3333

概述

聯發科技 MT3333 是多合一的多星系衛星定位系統單晶片（SoC），能廣泛適用於行動通訊、車用、定時、個人防盜追蹤系統、無人飛行機與工業應用。MT3333 具備高追蹤精準度，能在擁擠的城市環境中提供更好的表現。

MT3333 僅僅只需九個被動外部元件，同時與聯發科技 MT3337 和 MT3339 的腳位相容，使您能有彈性的設計一系列不同層級的裝置，並減少重複的硬體開發工作。

主要特色

  • 追蹤感度：-165dBm

  • 持續追蹤功耗：5~19mA

  • 支援 GPS, GLONASS, Beidou, Galileo, QZSS 與 SBAS

  • 具備聯發科技 AlwaysLocate™ 技術，可降低功耗

MT3333 Product Brief
MT3333 Datasheet

MT3333 內建的 LNA 可達到 2.2 dB 的 total receiver chain NF，所以可以不需要外接的 LNA 元件。另外，透過晶片上的 image-rejection mixer，您也不需要外掛 SAW filter。


MT3333 在提供持續定位的同時，也提供最低的功耗。透過數個進階功能如 AlwaysLocate™、EASY™、HotStill™、EPO™ 以及日誌功能，MT3333 適用於各種可攜帶式裝置應用，如數位相機、行動電話、可攜式媒體播放器與遊戲裝置。

Block Diagram of MT3333

Features

功能規格

  • GPS/GLONNASS/GALILEO/BEIDOU receiver

  • Supports multi-GNSS including QZSS and SBAS ranging

  • Supports WAAS/ENGNOS/MSAS/GAGAN

  • 12 multi-tone active interference cancellers (with ISSCC2011 award)

  • RTCM ready

  • Indoor/outdoor multipath detection and compensation

  • Supports FCC E911 compliance and A-GPS

  • Maximum fixed update rate up to 10 Hz


ARM7EJ-S CPU

  • Up to 158 MHz processor clock

  • Dynamic clock rate control


Package

  • VFBGA: 4.3 mm x 4.3 mm, 57 balls, 0.5 mm pitch


Advanced software features

  • AlwaysLocate™ advanced location awareness technology

  • EPO™/HotStill™ orbit prediction

  • EASY™ self-generated orbit prediction

  • Supports logger function


RF configuration

  • SoC, integrated in single chip with CMOS process


Reference oscillator

  • TCXO Frequency 16.368 MHz, 12.6 ~ 40 MHz

  • TCXO Frequency variation: ±2.5 ppm

  • Crystal Frequency: 26 MHz, 12.6 ~ 40.0 MHz

  • Crystal Frequency accuracy: ±10 ppm


Pulse-per-second (PPS) GPS time reference

  • Adjustable duty cycle

  • Typical accuracy: ±10 ns

Power scheme

  • 1.8V SMPS built-in SoC

  • Direct lithium battery connection (2.8V ~ 4.3V)

  • Self build 1.1V RTC LDO, 1.1V core LDO, and 2.8V TCXO LSO


Built-in reset controller

  • No external reset control IC needed


Internal real-time clock (RTC)

  • 32.768KHz ±20 ppm crystal

  • 1.1 volts RTC output

  • Supports external pin to wake up MT3333


Serial interface

  • 3 UARTs

  • SPI/I2C

  • GPIO interface (up to 15 pins)


Sensitivities

  • Acquisition: -148 dBm (cold) / -163 dBm(hot)

  • Tracking: -165 dBm


Power consumption (GPS+GLONASS)

  • Acquisition: 37 mW

  • Tracking: 27 mW

  • AlwaysLocate™: 3.0 mW


Slim hardware design

  • 9 passive external components

  • Single RF Front-End for Multi-GNSS frequency bands


Compatibility

  • Pin-to-pin compatible with MT3339/MT3337