Product Description
The MTK MT3333A is a versatile and high-performance GPS chip designed to offer excellent positioning accuracy while maintaining low power consumption. It integrates multiple GNSS systems, making it a flexible solution for a wide range of devices that require accurate location tracking.
One of the key advantages of the MT3333 is its multi-GNSS support. By supporting GPS, GLONASS, QZSS, and BeiDou, the chip can access a greater number of satellites than traditional single-constellation GPS solutions, improving the accuracy and robustness of positioning data. In areas with obstructed views of the sky, such as cities with tall buildings or wooded areas, having access to multiple constellations can help maintain a stable and reliable GPS signal.
The high sensitivity of the MT3333 is another important feature. With its cold start sensitivity of -148 dBm and hot start sensitivity of -160 dBm, the MT3333 can function effectively even in environments where GPS signals are weak. This makes it suitable for use in challenging scenarios, such as urban canyons, inside buildings, or under tree cover. The chip is designed to maintain a strong connection with the satellites, ensuring reliable and accurate position data.
The MT3333 is also designed to be power-efficient, making it ideal for battery-powered devices like wearables and portable GPS units. It draws approximately 35 mA of current during active operation, and it includes various power-saving features that reduce energy consumption when the GPS is not in use. This ensures that devices powered by the MT3333 can last longer on a single charge.
The quick TTFF performance of the MT3333A is one of its standout characteristics. Whether it's a cold start (when the device is powered on for the first time) or a warm start (when the device is resumed from a previous session), the chip can quickly acquire GPS signals and calculate a position. This is especially important for applications where a fast fix is needed, such as in navigation systems or location-based services that require real-time data.
The A-GPS feature is another valuable aspect of the MT3333. A-GPS utilizes external information, such as data from cellular networks or Wi-Fi, to help the chip acquire a GPS fix faster, even when the satellite signal is weak. This is particularly useful in urban environments where the line of sight to satellites may be obstructed.
The MT3333A is also designed to be compact, integrating multiple GPS components into a single chip. This integration reduces the overall size and cost of the GPS solution, making it an ideal choice for small and portable devices.
With its 10 Hz update rate, the MT3333 is capable of providing frequent position updates, making it suitable for high-speed applications like automotive navigation or sports tracking, where accurate and real-time location data is essential.
Specification
Chip Type: Single-chip GPS receiver with support for multi-GNSS (GPS, GLONASS, QZSS, BeiDou).
Frequency Bands: The MT3333 operates in the L1 frequency band (1575.42 MHz), the primary frequency for GPS-based systems.
Accuracy:
Position Accuracy: Typically 2.5 meters under open sky conditions.
Velocity Accuracy: 0.1 m/s.
Time Accuracy: 50 ns.
Sensitivity:
Cold Start Sensitivity: -148 dBm.
Hot Start Sensitivity: -160 dBm.
Power Consumption:
Operating Voltage: 2.7V to 3.6V.
Typical Power Consumption: Around 35 mA during active operation, with lower power consumption in sleep mode.
Data Interfaces: The MT3333 supports UART and I2C interfaces, making it easy to integrate with microcontrollers and other embedded systems.
Satellite Tracking: The chip is capable of tracking up to 22 satellites simultaneously, ensuring consistent positioning performance even in environments where the number of visible satellites fluctuates.
Update Rate: Supports up to 10 Hz for position updates, suitable for high-speed applications requiring frequent location data.
Antenna: Supports both active and passive antenna connections for flexible integration into different devices.
A-GPS Support: The MT3333 supports Assisted GPS (A-GPS), which helps to speed up the process of obtaining a GPS fix, especially when the satellite signal is weak or when the device is in an area with poor GPS signal reception.
