MT3339

概述

聯發科技 MT3339 是多合一的 GPS 衛星定位系統單晶片(SoC)。它可廣泛應用於行動通訊、車用、定時、個人防盜追蹤系統、數位相機與工業應用。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。


MT3339 僅僅只需外九個被動外部元件,同時與聯發科技 MT3333 和 MT3337 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

  • 極低的持續追蹤功耗:3mA

  • 支援 GPS, QZSS 與 SBAS

  • 具備聯發科技 AlwaysLocate™ 技術,可降低功耗

MT3339 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。


MT3339 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,MT3339 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。

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