Overview
Introduction
The Goodix GR5405 is an automotive Bluetooth LE 5.3 SoC designed to operate across a wide temperature range, from –40°C to 105°C, and is AEC-Q100 Grade 2 certified. It is ideal for various automotive applications, including digital key and Tire Pressure Monitoring System (TPMS). Additionally, it supports Bluetooth Mesh networking protocols.
Based on Arm® Cortex®-M4F CPU core running at 64 MHz, the GR5405 integrates a 2.4 GHz RF transceiver, Bluetooth LE 5.3 protocol stack, 512 KB on-chip Flash memory, 96 KB system SRAM, and a rich set of peripherals. It provides outstanding RF performance, with a maximum TX power of +15 dBm, and an RX sensitivity of –99 dBm in Bluetooth LE 1 Mbps mode, achieving an overall link budget of up to 114 dB.
For more information about GR5405 SoCs, refer to GR5405 Datasheet.
Test Items
- TX conducted spurious harmonics H2–H10 (ETSI and FCC)
- Lower band edge (MIIT-China)
- Upper band edge (MIIT-China and FCC)
- Out of band edge (ETSI)
- CISPR 25 automotive electromagnetic compatibility
- FCC radiated spurious harmonics
- RF PHY performance
- The CISPR 25 automotive electromagnetic compatibility and FCC radiated spurs tests fall under the category of device system test. The test results are significantly influenced by the PCB design of the device under test (DUT). The data results in this report are for reference only.
- The RF PHY performance test follows the test cases in RF-PHY.TS.p15. For more information about RF performance, refer to Radio Frequency Physical Layer (RF PHY) (version: RF-PHY.TS.p15).
Test Results
The results of the GR5405 RF system performance test are as follows:
| Test Item | Reference Standard | Pass Standard | Result |
|---|---|---|---|
| TX conducted spurious harmonics 30 MHz–1 GHz |
ETSI EN 300 328 v2.2.1 (2019-04) |
–36 dBm or –54 dBm (depending on the frequency range) (100 kHz BW) dBm (depending on the frequency range) (100 kHz BW) |
Pass |
| TX conducted spurious harmonics 1 GHz–25 GHz |
ETSI EN 300 328 v2.2.1 (2019-04) |
–30 dBm (1 MHz BW) | Pass |
| TX conducted spurious harmonics 1 GHz–25 GHz | FCC part15.249 |
Field strength < 54 dBuV/m @3m –41.12 dBm (1 MHz BW) |
Pass |
| Lower band edge | SRRC | –40 dBm below 2.4 GHz | Pass |
| Upper band edge | FCC part15.249 |
Field strength < 54 dBuV/m @3m –41.12 dBm (1 MHz BW) |
Pass |
| Out of band | ETSI EN 300 328 | –20 dBm at 2.4835 GHz | Pass |
| CISPR 25 automotive electromagnetic compatibility (EMC) | CISPR 25 section 6.4 | Compliant with the standard CE Class 3 (actually can meet the Class 5 requirements) and RE Class 5 requirements | Pass |
| FCC radiated spurs | FCC part15.247 |
Field strength < 54 dBuV/m @3m (Ave.), 74 dBuV/m @3m (Peak) –41.12 dBm (1 MHz BW) |
Pass |
| Transmission Direction | Test Item | Result | Remarks |
|---|---|---|---|
| TX | RF-PHY/TRM/BV-01-C output power | Pass | |
| RF-PHY/TRM/BV-03-C in-band spurs - 1M | Pass | ||
| RF-PHY/TRM/BV-05-C modulation characteristics - 1M | Pass | ||
| RF-PHY/TRM/BV-06-C carrier frequency offset and frequency drift - 1M | Pass | ||
| RF-PHY/TRM/BV-08-C in-band spurs - 2M | Pass | ||
| RF-PHY/TRM/BV-10-C modulation characteristics - 2M | Pass | ||
| RF-PHY/TRM/BV-12-C carrier frequency offset and frequency drift - 2M | Pass | ||
| RF-PHY/TRM/BV-13-C modulation characteristics - 125k | Pass | ||
| RF-PHY/TRM/BV-14C carrier frequency offset and frequency drift - 125k | Pass | ||
| RX | RF-PHY/RCV/BV-01-C RX sensitivity - 1M | Pass | |
| RF-PHY/RCV/BV-03-C C/I performance - 1M | Pass | Image frequency = –2 MHz | |
| RF-PHY/RCV/BV-04-C blocking performance - 1M | Pass | ||
| RF-PHY/RCV/BV-05-C intermodulation performance - 1M | Pass | ||
| RF-PHY/RCV/BV-06-C maximum input signal level - 1M | Pass | ||
| RF-PHY/RCV/BV-07-C PER report integrity - 1M | Pass | ||
| RF-PHY/RCV/BV-08-C RX sensitivity - 2M | Pass | ||
| RF-PHY/RCV/BV-09-C C/I performance - 2M | Pass | Image frequency = –4 MHz | |
| RF-PHY/RCV/BV-10-C blocking performance - 2M | Pass | ||
| RF-PHY/RCV/BV-11-C intermodulation performance - 2M | Pass | ||
| RF-PHY/RCV/BV-12-C maximum input signal level - 2M | Pass | ||
| RF-PHY/RCV/BV-13-C PER report integrity - 2M | Pass | ||
| RF-PHY/RCV/BV-26-C RX sensitivity - 500k | Pass | ||
| RF-PHY/RCV/BV-27-C RX sensitivity - 125k | Pass | ||
| RF-PHY/RCV/BV-28-C C/I performance - 500k | Pass | Image frequency = –2 MHz | |
| RF-PHY/RCV/BV-29-C C/I performance - 125k | Pass | Image frequency = –2 MHz | |
| RF-PHY/RCV/BV-30-C PER report integrity - 500k | Pass | ||
| RF-PHY/RCV/BV-31-C PER report integrity - 125k | Pass |
When the transmission rate is 1 Ms/s and 2 Ms/s, the GR5405 RF performance test results are as follows:
| RF Test Item | 1 Ms/s | 2 Ms/s | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Bluetooth LE Standard | GR5405 Test Result | Bluetooth LE Standard | GR5405 Test Result | |||||||
| Min. | Typ. | Max. | Min. | Typ. | Max. | |||||
| RX | Sensitivity (PER < 30.8) (dBm) | ≤ –70 | –101 | –100 | –98 | ≤ –70 | –98 | –97 | –94 | |
| ≤ –75 | S=2: –102 | - | - | |||||||
| ≤ –82 | S=8: –105 | - | - | |||||||
| Maximum received signal (dBm) | ≥ –10 | 0 dBm | ≥ –10 | 0 dBm | ||||||
| C/I co-channel (PER < 30.8%) (dB) | ≤ 21 | 7 | ≤ 21 | 7 | 7 | 7 | ||||
|
Adjacent channel selectivity (PER < 30.8%) (dB) |
C/I +1 MHz | ≤ 15 | –18 | - | - | - | - | |||
| C/I –1 MHz | ≤ 15 | –16 | - | - | - | - | ||||
| C/I +2 MHz | ≤ –17 | –41 | - | - | - | - | ||||
| C/I –2 MHz | ≤ –17 | –31 | - | - | - | - | ||||
| C/I +3 MHz | ≤ –27 | –43 | - | - | - | - | ||||
| C/I –3 MHz | ≤ –27 | –41 | - | - | - | - | ||||
| C/I +2 MHz | - | - | - | - | ≤ 15 | - | –17 | - | ||
| C/I –2 MHz | - | - | - | - | ≤ 15 | - | –15 | - | ||
| C/I +4 MHz | - | - | - | - | ≤ –17 | - | –33 | - | ||
| C/I –4 MHz | - | - | - | - | ≤ –9 | - | –33 | - | ||
| C/I ± (6 + 2n) | - | - | - | - | ≤ –27 | - | –37 | - | ||
| Mirror image | ≤ –9 | Same as that with C/I –2 MHz | ≤ –9 | Same as that with C/I –4 MHz | ||||||
| Mirror image ±1 MHz | ≤ –15 | Same as that with C/I –1 MHz, –3 MHz | - | - | - | - | ||||
| Mirror image ±2 MHz | - | - | - | - | ≤ –15 | Same as that with C/I –2 MHz, –6 MHz | ||||
| Blocking (dBm) | 30 MHz–2000 MHz | ≥ –30 | –25 | ≥ –30 | –25 | |||||
| 2003 MHz–2399 MHz | ≥ –35 | –25 | ≥ –35 | –25 | ||||||
| 2484 MHz–2997 MHz | ≥ –35 | –25 | ≥ –35 | –25 | ||||||
| 3000 MHz–12750 MHz | ≥ –30 | –25 | ≥ –30 | –25 | ||||||
| PER Report Integrity (PER, %) | 50–65.4 | 50 | 50–65.4 | 50 | ||||||
| Intermodulation (dBm) | ≥ –50 | –41 | –32 | –21 | ≥ –50 | –37 | –33 | –24 | ||
| TX | Maximum output power (dBm) | ≤ 10 | Max. 15 | ≤ 10 | - | 15 | - | |||
| Peak-to-average ratio (PAR) (dB) | ≤ 3 | 0.563 | 0.61 | 0.649 | ≤ 3 | 0.43 | 0.45 | 0.48 | ||
| Carrier frequency offset and frequency drift (typ.) (kHz) | Frequency offset (kHz) | ±150 | Depending on the crystal oscillator | ±150 | Depending on the crystal oscillator | |||||
| Frequency drift (kHz) | ±50 | 9 | 11 | 13.8 | ±50 | 9 | 11 | 14 | ||
| Max. drift rate (kHz/50 ms) | ±20 | ±0.5 | ±5 | ±10 | ±20 | ±0.5 | ±5 | ±10 | ||
| Modulation | Δf1avg modulation (kHz) | 225–275 | 245 | 246.8 | 248.6 | 450–550 | 492 | 500 | 518 | |
| Δf2max 99.9% (kHz) | ≥ 185 | 211 | 225 | 240 | ≥ 370 | 404 | 422 | 442 | ||
| Δf2avg/Δf1avg | ≥ 0.8 | 0.996 | 1.03 | 1.09 | ≥ 0.8 | 0.905 | 0.916 | 0.925 | ||
| Second harmonics (dBm) | ≤ –30 | –43 | ≤ –30 | - | –43 | - | ||||
| Third harmonics (dBm) | ≤ –30 | –48 | ≤ –30 | - | –48 | - | ||||
| In-band spurs (dBm) | ±2 MHz offset | ≤ –20 | –38 | –37 | - | - | - | - | ||
| ±3 MHz offset | ≤ –30 | –39 | - | - | - | - | ||||
| ≥ +3 MHz offset | ≤ –30 | - | - | - | - | |||||
| ≤ –3 MHz offset | ≤ –30 | - | - | - | - | |||||
| ±4 MHz offset | - | - | - | - | ≤ –20 | - | –37 | - | ||
| ±5 MHz offset | - | - | - | - | ≤ –20 | |||||
| ≥ +5 MHz offset | - | - | - | - | ≤ –30 | - | –38 | - | ||
