MT3339 GPS芯片
概述聯發科技 MT3339 是多合一的 GPS 衛星定位系統單芯片（SoC）。它可廣泛應用于移動通信、車用、定時、個人防盜追蹤系統、數字相機與工業應用。MT3339 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組件，同時與聯發科技 MT3333 和 MT3337 的腳位兼容，使您能有彈性的設計一系列不同層級的設備，并減少重復的硬件開發工作。主要特色追蹤
- 型號：
- 采用芯片：
- 尺寸：
概述
聯發科技 MT3339 是多合一的 GPS 衛星定位系統單芯片（SoC）。它可廣泛應用于移動通信、車用、定時、個人防盜追蹤系統、數字相機與工業應用。MT3339 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組件，同時與聯發科技 MT3333 和 MT3337 的腳位兼容，使您能有彈性的設計一系列不同層級的設備，并減少重復的硬件開發工作。
主要特色
追蹤感度：-165dBm
極低的持續追蹤功耗：3mA
支持 GPS, QZSS 與 SBAS
具備聯發科技 AlwaysLocate? 技術，可降低功耗
MT3339 內置的 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 在提供持續定位的同時，也提供最低的功耗。透過數個高端功能如 AlwaysLocate?、EASY?、HotStill?、EPO? 以及日志功能，MT3339 適用于各種可攜帶式設備應用，如數字相機、手機、可攜式媒體播放器與游戲設備。
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