CC1125RHBT - Sub-1GHz Narrowband RF Transceiver | Texas Instruments
N.º da peça: CC1125RHBT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.14 | $4,14 |
| 10 | $3.85 | $38,50 |
| 100 | $3.42 | $342,00 |
| 500 | $3.05 | $1.525,00 |
| 1.000 | $2.78 | $2.780,00 |
CC1125RHBT Visão geral
A narrowband RF transceiver is a radio IC that transmits and receives data in a narrow channel bandwidth, maximizing spectral efficiency and link budget in licensed and license-free ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) bands. Within the power-management and connectivity hierarchy of a wireless system, the transceiver sits between the antenna front end and the host microcontroller, handling modulation, filtering, and baseband processing. The CC1125 belongs to the CC112x family of high-performance Sub-1 GHz radios from Texas Instruments.
Key features of the CC1125 include fully integrated filtering that removes the need for costly external SAW and IF filters, very low-power and low-voltage operation, and a complete on-chip radio architecture including frequency synthesizer, PA, and receiver chain. The integrated filters reduce bill-of-materials cost and board area while improving receiver robustness in congested narrowband bands such as 433 MHz and 868/915 MHz.
The architecture is a single-chip direct-conversion/low-IF design optimized for narrowband systems: all channel filtering is performed on-chip, enabling tight adjacent-channel selectivity and compliance-oriented narrowband operation. The device combines an RF transceiver core with MCU-style digital control, classified by distributors as an RF TxRx + MCU device for general ISM < 1 GHz use.
Typical applications include utility metering (water, gas, electricity), wireless M-Bus and other narrowband metering stacks, industrial telemetry and SCADA links, security and alarm systems, and long-range ISM sensor networks where narrowband operation delivers maximum range per milliwatt.
Design consideration: because the CC1125 targets narrowband channels, crystal accuracy and frequency planning are critical - a low-ppm crystal and careful RF layout around the exposed pad ground are essential to stay within channel masks at 868/915 MHz.
This page synthesizes distributor pricing, drop-in alternatives within the TI CC112x/CC120x family, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para CC1125RHBT — 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 CC1125RHBT (mesmo formato e footprint) — diferindo em Package, Product Type, Integrated Filters, Modulation.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasCC1125RHBT Especificações
| Product Type | Single-chip Sub-1 GHz RF transceiver (TxRx + MCU) |
| Frequency Band 1 | 164 MHz to 192 MHz |
| Frequency Band 2 | 274 MHz to 320 MHz |
| Frequency Band 3 | 410 MHz to 480 MHz |
| Frequency Band 4 | 820 MHz to 960 MHz |
| Application Segment | General ISM < 1 GHz |
| Modulation | Narrowband systems (CC112x family) |
| Integrated Filters | Yes - no external SAW/IF filters required |
| Encapsulamento | 32-VFQFN Exposed Pad (RHB) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Guia de Configuração de Pinos do CC1125RHBT 32-vfqfn exposed pad (rhb)
Configuração de pinos para CC1125RHBT (pacote 32-vfqfn exposed pad (rhb)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para CC1125RHBT.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
CC1125RHBT é adequado para 6 aplicaçãos: Utility Metering (Water/Gas/Electric), Industrial Telemetry and SCADA, Security and Alarm Systems, Long-Range ISM Sensor Networks, Smart Home and IoT Gateways, Wireless Audio-Visual and General ISM Links.
Utility Metering (Water/Gas/Electric)
The CC1125RHBT fits utility metering because narrowband operation in the 169 MHz and 868 MHz SRD bands maximizes link budget for meters located in basements or metal enclosures. Its integrated channel filtering provides the adjacent-channel selectivity needed in congested metering bands, eliminating external SAW filters and reducing meter BOM cost. In a typical wireless M-Bus style stack, the transceiver handles the narrowband air interface while a low-power MCU manages protocol and sleep scheduling; the device's low-voltage, low-power design supports battery lifetimes measured in years, and the same 32-VFQFN footprint can be reused across regional SKUs by changing band configuration in firmware.
Recomendado
Industrial Telemetry and SCADA
For industrial telemetry, the CC1125RHBT's four-band coverage (164-192, 274-320, 410-480, 820-960 MHz) lets one hardware platform serve different licensed and ISM channels per plant or region. Narrowband channels deliver range per watt that wideband links cannot match, which matters for remote sensors powered from limited supplies. The fully integrated filtering survives electrically noisy factory environments where strong out-of-band interferers are common, and the on-chip radio core reduces calibration complexity. Deployed between a PLC-grade controller and an antenna, it provides robust point-to-multipoint links for tank levels, pump status, and alarm reporting across large industrial sites.
Recomendado
Security and Alarm Systems
Alarm and security panels benefit from the CC1125RHBT's high receiver sensitivity and narrowband interference rejection, since alarm bands at 433 MHz and 868 MHz are crowded with consumer devices. Integrated filtering removes the need for external SAW filters, reducing sensor-node size for discreet door/window and PIR transmitters. The four-band coverage allows the same PCB to be certified for regional frequency plans, simplifying global product lines. In a typical deployment, motion sensors transmit short narrowband frames to a panel that polls each node; the transceiver's low-power sleep modes keep coin-cell or lithium sensor batteries operating for years between replacements.
Recomendado
Long-Range ISM Sensor Networks
Star and mesh sensor networks in the 410-480 MHz and 820-960 MHz ISM bands use the CC1125RHBT where maximum range per node is the primary requirement. Narrowband modulation concentrates transmit energy into a small channel, improving receiver SNR and therefore link distance; combined with the device's high sensitivity, this enables multi-kilometer links with simple wire antennas. The integrated filter chain maintains selectivity when many nodes share a channel, and the RF TxRx + MCU architecture offloads packet handling from the host. Gateways pair the transceiver with a general-purpose MCU, while field nodes pair it with an ultra-low-power MCU and a DC-DC converter for energy-harvesting or battery operation.
Recomendado
Smart Home and IoT Gateways
Sub-1 GHz IoT gateways and smart-home hubs use the CC1125RHBT to bridge battery-free mains-powered hubs with low-power Sub-1 GHz sensor nodes, where 868/915 MHz propagation penetrates walls better than 2.4 GHz. The transceiver's narrowband selectivity lets hubs coexist with Wi-Fi and Bluetooth traffic without degradation, and integrated filtering reduces gateway BOM cost at volume. Its four-band coverage allows a single gateway hardware revision to ship globally with band selection in firmware. The RF TxRx + MCU classification simplifies driver integration on Linux- or RTOS-based hub processors, while TI reference designs provide matching networks and layout guidance for the 32-VFQFN exposed-pad package.
Recomendado
Wireless Audio-Visual and General ISM Links
General-purpose point-to-point ISM links - including low-latency control links for audio-visual accessories, lighting control, and remote actuation - leverage the CC1125RHBT's 410-480 MHz band, where narrowband channels avoid the congestion of 2.4 GHz. The device's very low-voltage operation suits portable, battery-operated remotes, and its integrated filters keep component count minimal for cost-sensitive consumer hardware. Because modulation and packet handling are configured through the register map, firmware teams can tune data rate and channel spacing per product line on identical hardware. Pairing the transceiver with a low-cost MCU yields robust bidirectional links for handheld controllers, dimmers, and motorized fixtures in dense RF environments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para CC1125RHBT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | CC1125RHMR | CC1120RHBT | CC1200RHBR |
|---|---|---|---|---|
| Package | 32-VFQFN Exposed Pad (RHB) | 32-VFQFN Exposed Pad - same | 32-VFQFN Exposed Pad - same | 32-VFQFN Exposed Pad - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Frequency Coverage | 164-192 / 274-320 / 410-480 / 820-960 MHz | Same as CC1125 | Similar Sub-1 GHz bands | Sub-1 GHz, narrower band focus (820-960 MHz emphasis) |
| Product Tier | Ultra-high performance flagship | Identical (same die) | Performance tier below CC1125 | Cost-optimized band-limited tier |
| External SAW/IF Filters | Not required | Not required | Not required | Not required |
| Target Application | Narrowband ISM/SRD, metering, industrial telemetry | Identical applications | Shorter-range narrowband links | 868/915 MHz cost-sensitive systems |
| Drop-in Footprint Compatibility | Reference (32-VFQFN RHB) | Pin-to-pin, 100% | Pin-to-pin, same footprint | Same footprint, verify register config |
Principais diferenciais
- Widest band coverage in the TI CC112x family (vs CC1200RHBR)
- Ultra-high-performance narrowband link budget (vs CC1120RHBT)
- No external SAW or IF filters required (vs CC1120RHBT)
Notas de projeto
The 32-VFQFN exposed pad is the primary RF ground for the CC1125RHBT. Solder it to a continuous ground plane with an array of vias (at least 9 in a 3x3 pattern) directly under the pad; insufficient via stitching is the most common cause of degraded sensitivity and spurious emissions in CC112x layouts. Follow the TI CC112x reference design for balun and matching network placement, keeping the RF path as short as possible and separating the RF section from switching regulators.
Narrowband operation leaves little margin for frequency error. Use a low-ppm crystal (±10 ppm or better including load capacitance error) and account for crystal aging and temperature drift, especially when operating near band edges such as 863 MHz or 928 MHz. Do not rely on the internal RC oscillator for the radio; configure channel spacing and deviation per the TI register-setting spreadsheets for the target band rather than generic settings.
Because the CC1125 targets very low-power and low-voltage operation, power the radio from a dedicated low-noise LDO or low-Iq buck (for example TI TPS62740) rather than sharing a rail with motors or displays. Estimated: at typical ISM transmit powers the TX-stage current is the dominant battery drain, so duty-cycle the radio aggressively - sleep between polls and use hardware packet handling to minimize MCU wake time. Verify supply sequencing against the datasheet to avoid unintended PA biasing during startup.
Informações de conformidade
RoHS compliance per distributor listings. Additional environmental data should be confirmed on the TI product page for the exact ordering suffix.
