Single-Chip Multi-Standard GNSS Receiver

General Description

The RTL8771AW-CG is a high-performance GNSS single chip that supports a multi-standard (GPS/ Beidou/Glonass) positioning solution. The RTL8771AW includes on-chip RF, baseband, and RISC CPU. The RTL8771AW achieves high-performance low-SNR tracking/acquisition sensitivity, and fast Time-to-First-Fix (TTFF). The RTL8771AW also provides various navigation applications including SBAS/DGPS (WAAS, MSAS, EGNOS, etc.) and AGPS, which speeds the positioning time.

With an on-chip integrated LNA, RTL8771AW delivers a total receiver noise figure of 2.6 dB (before ADC). RTL8771AW has on chip regulators easily integrated into your system without extra voltage regulator. The crystal supporting feature allows users to implement low-cost design circuit with minimum BOM cost.

With an embedded 32-bits RISC controller running at 87MHz, the system performs time-critical processes, including data decoding and positioning. The real-time operating system also allows for efficient task scheduling.

The RTL8771AW offers an RS-232 data port and I2C interface for data exchange. The configurable RS-232 interface enables use of a higher data rate to send more data, as well as National Marine Electronics Association (NMEA) packets. Standard pre-defined HCI commands make the RTL8771AW easy and flexible to configure.


  • 32 tracking/210 PRN-channel GNSS Receiver
  • Multi-standard GPS/Beidou/Glonass navigation system supported
  • SBAS supported (at user request)
  • AGPS supported (at user request)
  • Supports TCXO or low-cost crystal
  • Maximum update rate up to 5Hz
Reference Oscillator
  • TCXO/Crystal
  • Frequency 16MHz/26MHz
  • Frequency maximum error: +/-2.5ppm
RF Configuration
  • 5-bit IF I/Q signal
  • RF Integrated in single chip
MIPS Compatible CPU
  • 87MHz processor clock
  • Supports MIPS32/MIPS16 instructions
Host Interface
  • UART
  • I2C
  • NMEA 0183 standard
  • 40-pin 5mmx5mm QFN