MT3339 GPS芯片
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
- 型号：
- 采用芯片：
- 尺寸：
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。
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