The JS-ATP28-M is a cost-effective, low-power, multi-mode dual-frequency positioning module supporting GPS, BDS, GLONASS, Galileo, QZSS, and SBAS (L1+L5). Designed for a wide range of applications and end products, it is built on a high-performance SoC positioning engine that ensures excellent sensitivity, fast acquisition, and strong interference suppression. Even in challenging signal conditions, the JS-ATP28-M delivers accurate, reliable positioning performance.
Product Features
Based on the high-performance GNSS SOC series
135 channels (L1:75, L5:60)*
Cold start acquisition sensitivity is -148dBm, tracking sensitivity is -165dBm
Navigation update rate up to 10Hz
Supports GPS, BDS, GLONASS, Galileo, QZSS and SBAS
Support AGPS
Indoor and outdoor multipath detection and compensation
Application-rich hardware interfaces support multiple configurations
Integrated TCXO, LNA, SAW and RTC
Compact size (28.0*28.0*12.6mm±0.3mm), suitable for space-sensitive applications
Comply with ROHS standards
Support standard NMEA 0183 V3.01/V4.10
Support 1PPS output
Performance
| Parameter | Specification |
| Constellation Frequency | GPS L1CA L5 BDS B1I B2a Galileo E1B E1C E5a GLONASS L1OF QZSS L1CA L1SAIF L5 SBAS WAAS EGNOS MSAS GAGAN |
| Sensitivity | Tracking and Navigation -165dBm |
| Cold Start -148dBm | |
| Time-To-First-Fix | Cold Start 24s |
| Hot Start 1s | |
| GNSS Position accuracy | Horizontal 3G+B 1.0m (L1+L5)；2.5m (L1) |
| vertical 2.25m | |
| Time pulse signal accuracy | 1PPS 10ns |
| Speed accuracy | 0.05m/s |
| Operational restrictions | Acceleration 4g |
| Altitude 10000m | |
| speed limit 100m/s | |
| Frequency of time pulse signal | 1Hz |
| Baud Rate | 4800-921600 bps（Default115200 bps |
| Max navigation update rate | 10 Hz （Default 1Hz） |
Pin Parameters
| No. | Name | I/O | Description |
| 1 | GND/PPS | G/O | Ground/time pulse signal output |
| 2 | GND | G | Ground |
| 3 | TX1 | O | Serial data output (TTL level) |
| 4 | RX1 | I | Serial data input (TTL level) |
| 5 | VCC | P | main power supply |
| 6 | VBAT/EN | I | Backup power/module power control switch |
Product Application
Automotive applications
Maritime navigation, fleet management
Intelligent logistics dispatching
Ground vehicle tracking and urban intelligent traffic management
Intelligent robots
Wearable devices
Personal travel and wilderness adventures
Emergency rescue
Protocols
| Protocol | Type |
| NMEA 0183 V3.01/V4.10 | Input/Output，ASCII |
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