MT3339

概述

联发科技 MT3339 是多合一的 GPS 卫星定位系统单芯片(SoC)。它可广泛应用于移动通信、车用、定时、个人防盗追踪系统、数字相机与工业应用。MT3339 具备高追踪精准度,能在拥挤的城市环境中提供更好的表现。


MT3339 仅仅只需外九个被动外部组件,同时与联发科技 MT3333 和 MT3337 的脚位兼容,使您能有弹性的设计一系列不同层级的设备,并减少重复的硬件开发工作。

主要特色

  • 追踪感度:-165dBm

  • 极低的持续追踪功耗:3mA

  • 支持 GPS, QZSS 与 SBAS

  • 具备联发科技 AlwaysLocate™ 技术,可降低功耗

MT3339 内置的 LNA 可达到 2.2 dB 的 total receiver chain NF,所以可以不需要外置的 LNA 组件。另外,透过芯片上的 image-rejection mixer,您也不需要插件 SAW filter。


MT3339 在提供持续定位的同时,也提供最低的功耗。透过数个高端功能如 AlwaysLocate™、EASY™、HotStill™、EPO™ 以及日志功能,MT3339 适用于各种可携带式设备应用,如数字相机、手机、可携式媒体播放器与游戏设备。

Specifications

  • 22 tracking / 66 acquisition-channel GPS receiver

  • Supports up to 210 PRN channels

  • Supports multi-GNSS including QZSS and SBAS ranging

  • Supports WAAS/EGNOS/MSAS/GAGAN

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

  • RTCM ready

  • Indoor and outdoor multi-path detection and compensation

  • Supports FCC E911 compliance and AGPS

  • Maximum fixed update rate up to 10 Hz


ARM7EJ-S CPU

  • Up to 98 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: ±2.0 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

  • 1.2 volts RTC output

  • Supports external pin to wake up MT3339


Serial interface

  • 3 UARTs

  • SPI/I2C

  • GPIO interface (up to 16 pins)


NMEA

  • NMEA 0183 standard V3.01 and backward compliance

  • Supports 219 different data


Sensitivities

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

  • Tracking: -165 dBm


Positioning Accuracy

  • Without Aiding: 3.0m 2D-RMS

  • DGPS: 2.5m


Power consumption (GPS+GLONASS)

  • Acquisition: 25 mW

  • Tracking: 18 mW

  • AlwaysLocate™: 3 mW


Slim hardware design

  • 52 mm² solution footprint with all software features inside

  • 9 passive external components


Compatibility

  • Pin-to-pin compatible with MT3337/MT3333