Product overview
Changsha Jinwei Integrated Circuit Co., Ltd’s DM113 provides BeiDou satellite/inertial positioning for integration into UAVs, surveying equipment, deformation monitoring, precision agriculture and machine-control systems. Its S207N chip integrates BeiDou RF and baseband functions, while built-in inertial devices support deeply coupled positioning. The module receives BeiDou-2 and BeiDou-3 signals through 192 channels, including B1C, B2a and B2b. RTK, RTD and PPP modes support centimeter-, decimeter- and meter-level positioning services, and the hardware incorporates a multipath mitigation design.
The DM113 combines its satellite and inertial hardware in a 17mm × 22mm × 2.8mm package weighing 2g. It requires a 3.0V–3.5V DC supply and provides three UART interfaces, one I2C, one PPS and one SPI interface. Supported protocols are RTCM2.X, RTCM3.X and NMEA-0183. Operating temperature extends from -40°C to +85°C, with storage permitted from -55°C to +125°C. The humidity rating is 95% under non-condensing conditions, and the HBM electrical rating is 1000V.
RTK positioning runs at 10Hz for satellite navigation or 5Hz for integrated positioning, alongside a 100Hz integrated positioning rate. Carrier-phase differential accuracy is ≤2cm+1ppm horizontally and ≤4cm+1ppm vertically, both at 1σ; BDS PPP three-dimensional accuracy is less than 1m. Integrated-navigation dead-reckoning accuracy is 2% of distance traveled over 1km or 2min. RTK initialization reliability reaches ≥99.9% with a 10km baseline. Cold-start, hot-start and reacquisition times are ≤35s, ≤3s and ≤1s respectively, each at 1σ.
Specifications
| Specification | Value & conditions |
|---|---|
| Model | DM113 |
| Positioning architecture | Compact satellite/inertial positioning module based on the S207N BeiDou-only integrated RF/baseband chip. |
| Integrated inertial hardware | Built-in inertial devices with deeply coupled satellite/inertial positioning. |
| Channels | 192 |
| Received frequencies | BD2: B1I/B2I/B3I; BD3: B1I/B3I/B1C/B2a/B2b. |
| RTK positioning rate | 10Hz / 5Hz10Hz for satellite navigation positioning; 5Hz for integrated positioning. |
| Integrated positioning rate | 100HzIntegrated positioning. |
| Static single-point accuracy | Horizontal ≤3.0m; vertical ≤5.0m.Static single-point positioning; 1σ. |
| Pseudorange differential accuracy | Horizontal ≤1.0m; vertical ≤1.5m.Pseudorange differential positioning; 1σ. |
| Carrier-phase differential accuracy | Horizontal ≤2cm+1ppm; vertical ≤4cm+1ppm.Carrier-phase differential positioning; 1σ. |
| Dynamic horizontal positioning accuracy | ≤10.0mDynamic single-point positioning; 1σ. |
| Velocity accuracy | ≤0.2m/sDynamic measurement; 1σ. |
| PPP positioning accuracy | Less than 1mBDS PPP; three-dimensional positioning. |
| Dead-reckoning accuracy | 2% × distance traveledIntegrated navigation dead reckoning over 1km or 2min. |
| Timing accuracy | ≤30ns1σ. |
| Cold-start time | ≤35sCold start; 1σ. |
| Hot-start time | ≤3sHot start; 1σ. |
| Reacquisition time | ≤1s1σ. |
| RTK initialization time | — |
| RTK initialization reliability | ≥99.9%10km baseline. |
| Acquisition and tracking sensitivity | Acquisition ≤-140dBm; tracking ≤-150dBm. |
| Supported protocols | RTCM2.X, RTCM3.X, NMEA-0183 |
| Dimensions | 17mm × 22mm × 2.8mm |
| Weight | 2g |
| Supply voltage | 3.0V–3.5V DCDC supply. |
| Humidity | 95%Non-condensing. |
| Electromagnetic compatibility rating | 1000VHBM. |
| Operating and storage temperatures | Operating: -40°C to +85°C; storage: -55°C to +125°C. |
| Functional interfaces | 3 × UART, 1 × I2C, 1 × PPS, 1 × SPI |
| Positioning modes and multipath mitigation | RTK, RTD and PPP positioning modes, with centimeter-, decimeter- and meter-level positioning services; built-in multipath mitigation design. |
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