LM848 - Wi-Fi 6 (802.11ax) and Bluetooth 5.2 USB Combo Adapter | LM Technologies
N.º da peça: LM848 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $25.4 | $254,00 |
| 100 | $22.1 | $2.210,00 |
| 500 | $19.85 | $9.925,00 |
| 1.000 | $17.95 | $17.950,00 |
LM848 Visão geral
A USB combo adapter is a peripheral that bridges a host processor to two or more wireless radios through a standardized serial bus. In the wider connectivity taxonomy, this places the LM848 as a USB peripheral module -> wireless network adapter -> combo radio module -> RF subsystem, sitting beneath the host's network stack and above the antenna. USB-based combo adapters are favored over SDIO or PCIe cards in industrial and prototyping environments because they avoid slot allocation, simplify thermal management, and survive hot-swap events without rebooting the host.
The headline features of the LM848 include 802.11ax 2x2 operation, WPA3 security compliance, dual-band 2.4 GHz / 5 GHz / 6 GHz coverage where supported by regional regulations, Bluetooth 5.2 with LE Audio and Long Range (PHY Coded), and a USB 3.0 Type-A form factor that draws bus power. The device advertises ultra-fast throughput that suits video streaming, edge AI gateways, and dense Wi-Fi deployments where 802.11ac throughput would saturate.
Architecturally, the LM848 pairs an 802.11ax SoC with a BT 5.2 companion chip, sharing a single USB endpoint group over a USB 3.0 SuperSpeed link. The radio front end is tuned for worldwide regulatory domains, and the firmware exposes standard nl80211/cfg80201 (Linux) and MediaTek/Realtek-style vendor extensions (Windows) for throughput tuning.
Typical applications include industrial IoT gateways, in-vehicle infotainment prototyping, point-of-sale terminals, medical telemetry docks, and digital signage where Wi-Fi 6 capacity and Bluetooth coexistence are both required. When designing with the LM848, ensure the host supplies a USB 3.0 port capable of delivering 900 mA, and place the antenna at least 20 mm from any metal enclosure walls to preserve EIRP margin.
Alternativas drop-in para LM848 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LM848 (mesmo formato e footprint) — diferindo em Channel Bandwidth, Host Interface, Wireless Standard.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LM821
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM823
✅ Drop-In✓ Em estoque
$9.05 / unidade
Ver ficha técnica →LM848-IND
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
Edimax EW-7822UAC
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TP-Link Archer TX20U
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM848 Especificações (publicadas pelo fabricante)
| Wireless Standard | Wi-Fi 6 (IEEE 802.11ax) |
| Bluetooth Version | Bluetooth 5.2 |
| Host Interface | USB 3.0 (USB 3.1 Gen 1 SuperSpeed) |
| Bluetooth Profile | HCI (Host Controller Interface) |
| Wi-Fi Spatial Streams | 2x2 MU-MIMO |
| Channel Bandwidth | 20/40/80/160 MHz |
| Security | WPA3 |
| Operating Bands | 2.4 GHz, 5 GHz (6 GHz region-dependent) |
| OFDMA Support | Yes (uplink/downlink) |
| Bluetooth LE Audio | Yes |
| Bluetooth Long Range (PHY Coded) | Yes |
| Form Factor | USB Type-A dongle |
| Bus Powered | Yes (USB 5V) |
| Supported OS | Linux, Windows, Android |
| Antenna | Integrated onboard antenna |
Interfaces e Conectores do LM848
LM848 expõe as seguintes interfaces e conectores conforme publicado pelo fabricante: Sem fios, Bluetooth. A pinagem do header de expansão, a numeração dos pinos do conector e os limites elétricos estão definidos na documentação do fabricante.
| Sem fios | Wi-Fi 6 (IEEE 802.11ax) |
| Bluetooth | Bluetooth 5.2 |
Consulte a documentação do fabricante para a pinagem completa do conector de expansão e a numeração dos pinos do conector.
Aplicações típicas
LM848 é adequado para 7 aplicaçãos: Industrial IoT Gateways, In-Vehicle Infotainment Prototyping, Point-of-Sale Terminals, Medical Telemetry Docking Stations, Digital Signage and Kiosks, Edge AI and Robotics Development, ProAV and Wireless Conferencing.
Industrial IoT Gateways
The LM848's combination of Wi-Fi 6 2x2 MU-MIMO and Bluetooth 5.2 LE on a single USB 3.0 uplink makes it ideal for industrial IoT gateways that aggregate sensor telemetry and provision nearby devices. The 160 MHz channel support and OFDMA scheduling deliver aggregate throughput well above 1 Gbps in dense RF environments, while the BT 5.2 LE side handles beacon-based provisioning. Place the dongle on a USB 3.0 port of the gateway SBC, with the antenna at least 20 mm from enclosure metal.
Recomendado
In-Vehicle Infotainment Prototyping
In-vehicle infotainment (IVI) prototypes benefit from the LM848's WPA3 security and Wi-Fi 6 capacity for cabin hotspot use, plus BT 5.2 for hands-free audio and LE Audio passenger streaming. The dongle's bus-powered USB-A form factor docks directly to an automotive-grade head unit or aftermarket head unit without requiring M.2 slot allocation. Validation against AEC-Q100 is not implied; for production automotive deployment, choose a module with explicit automotive qualification.
Recomendado
Point-of-Sale Terminals
Modern point-of-sale (POS) terminals use Wi-Fi for store network backhaul and Bluetooth for peripherals such as barcode scanners, payment terminals, and receipt printers. The LM848 satisfies both roles on a single USB-A dongle, eliminating two separate radios. WPA3 secures transaction traffic, and OFDMA keeps latency low when multiple POS terminals contend for the same access point during peak hours.
Recomendado
Medical Telemetry Docking Stations
Medical telemetry docks transmit vital signs over Wi-Fi while pairing Bluetooth LE medical devices such as pulse oximeters and glucose meters. The LM848's LE Audio support enables low-latency streaming from bedside sensors, and WPA3 protects patient data in transit. Bus-powered operation simplifies the dock's medical-grade isolation design by eliminating a separate regulator for the radio.
Recomendado
Digital Signage and Kiosks
Digital signage and interactive kiosks require reliable high-bandwidth wireless for content updates and customer Wi-Fi access. The LM848's 2x2 MU-MIMO supports multiple simultaneous client connections in busy retail environments without throughput collapse. Its USB-A mechanical envelope fits behind slim kiosk bezels where M.2 cards cannot be accommodated.
Recomendado
Edge AI and Robotics Development
Edge AI and robotics platforms need high-throughput wireless for fleet learning and OTA updates, plus Bluetooth for short-range commissioning and debugging. The LM848's USB 3.0 uplink keeps the radio off the M.2/PCIe bus, freeing those high-speed lanes for AI accelerators and vision SoCs. Plug the dongle into any spare USB 3.0 port of the robot's compute module and configure via Linux cfg80211.
Recomendado
ProAV and Wireless Conferencing
ProAV installations increasingly rely on wireless conferencing systems (Barco ClickShare, Microsoft Teams Rooms) that need high-throughput Wi-Fi for screen mirroring plus Bluetooth for room audio. The LM848's Wi-Fi 6 2x2 spatial streams sustain 4K mirroring without compression artifacts, and BT 5.2 LE Audio streams multi-channel room audio with broadcast isochronous channels. Drop it into any conferencing host with a USB 3.0 port.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM848 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM821 | LM823 | Edimax EW-7822UAC | TP-Link Archer TX20U |
|---|---|---|---|---|---|
| Brand | LM Technologies | LM Technologies | LM Technologies | Edimax | TP-Link |
| Package | USB Type-A dongle | USB Type-A dongle - same | USB Type-A dongle - same | USB Type-A dongle - same | USB Type-A dongle - same |
| Wi-Fi Standard | Wi-Fi 6 (802.11ax) | Wi-Fi 5 (802.11ac) | Wi-Fi 6 (802.11ax) | Wi-Fi 6 (802.11ax) | Wi-Fi 6 (802.11ax) |
| Bluetooth Version | BT 5.2 | BT 5.0 | BT 5.2 | No Bluetooth | No Bluetooth |
| Host Interface | USB 3.0 | USB 2.0 | USB 3.0 | USB 3.0 | USB 3.0 |
| OFDMA Support | Yes | No | No (basic only) | Yes | Yes |
| Security | WPA3 | WPA2 | WPA3 | WPA3 | WPA3 |
| Spatial Streams | 2x2 MU-MIMO | 2x2 MU-MIMO | 2x2 MU-MIMO | 2x2 MU-MIMO | 2x2 MU-MIMO |
| Channel Bandwidth | Up to 160 MHz | Up to 80 MHz | Up to 160 MHz | Up to 160 MHz | Up to 160 MHz |
Principais diferenciais
- Combined Wi-Fi 6 + Bluetooth 5.2 on a single USB-A dongle (vs Edimax EW-7822UAC)
- Higher 802.11ax generation with full OFDMA (vs LM821)
- WPA3 security across both radios (vs LM821)
Notas de projeto
USB 3.0 ports must supply 900 mA to enumerate the LM848 at SuperSpeed. If the host can only guarantee 500 mA (USB 2.0), the radio falls back to USB 2.0 and Wi-Fi throughput is capped at ~480 Mbps. Add an external powered USB 3.0 hub if the host port cannot deliver 900 mA.
Keep at least 20 mm of clearance around the LM848's onboard antenna. Metal enclosures, LCD panels, and battery cells detune the antenna and erode EIRP margin. For metal enclosures, cut a plastic window over the dongle or route a short U.FL pigtail to an external antenna (verify with manufacturer first).
Do not plug the LM848 into a USB 3.0 port adjacent to a USB 3.0 SSD - the 2.4 GHz harmonics of SuperSpeed signaling can desense the radio. If noise is observed, move the dongle to a different USB root port, use a shielded USB 3.0 extension cable, or enable USB 3.0 radio coexistence filters in the driver.
Informações de conformidade
RoHS compliance per LM Technologies product page. AEC-Q100 not applicable - USB dongle form factor is consumer/industrial. Halogen-free and conflict-mineral declarations not explicitly stated in the LM848 datasheet v1.0; verify with manufacturer sales for environmental certificates.