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MTK GPS方案

MT3339 GPS芯片

概述聯(lián)發(fā)科技 MT3339 是多合一的 GPS 衛(wèi)星定位系統(tǒng)單芯片（SoC）。它可廣泛應(yīng)用于移動通信、車用、定時、個人防盜追蹤系統(tǒng)、數(shù)字相機與工業(yè)應(yīng)用。MT3339 具備高追蹤精準(zhǔn)度，能在擁擠的城市環(huán)境中提供更好的表現(xiàn)。MT3339 僅僅只需外九個被動外部組件，同時與聯(lián)發(fā)科技 MT3333 和 MT3337 的腳位兼容，使您能有彈性的設(shè)計一系列不同層級的設(shè)備，并減少重復(fù)的硬件開發(fā)工作。主要特色追蹤

  • 型號：
  • 采用芯片：
  • 尺寸：

概述

聯(lián)發(fā)科技 MT3339 是多合一的 GPS 衛(wèi)星定位系統(tǒng)單芯片（SoC）。它可廣泛應(yīng)用于移動通信、車用、定時、個人防盜追蹤系統(tǒng)、數(shù)字相機與工業(yè)應(yīng)用。MT3339 具備高追蹤精準(zhǔn)度，能在擁擠的城市環(huán)境中提供更好的表現(xiàn)。


MT3339 僅僅只需外九個被動外部組件，同時與聯(lián)發(fā)科技 MT3333 和 MT3337 的腳位兼容，使您能有彈性的設(shè)計一系列不同層級的設(shè)備，并減少重復(fù)的硬件開發(fā)工作。

主要特色

  • 追蹤感度：-165dBm

  • 極低的持續(xù)追蹤功耗：3mA

  • 支持 GPS, QZSS 與 SBAS

  • 具備聯(lián)發(fā)科技 AlwaysLocate? 技術(shù)，可降低功耗

MT3339 內(nèi)置的 LNA 可達到 2.2 dB 的 total receiver chain NF，所以可以不需要外置的 LNA 組件。另外，透過芯片上的 image-rejection mixer，您也不需要插件 SAW filter。


MT3339 在提供持續(xù)定位的同時，也提供最低的功耗。透過數(shù)個高端功能如 AlwaysLocate?、EASY?、HotStill?、EPO? 以及日志功能，MT3339 適用于各種可攜帶式設(shè)備應(yīng)用，如數(shù)字相機、手機、可攜式媒體播放器與游戲設(shè)備。

Features

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