TDA5240 - Multi-Band ASK/FSK RF Receiver -118dBm | Infineon
N.º de pieza: TDA5240 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.95 | $3,95 |
| 10 | $3.56 | $35,60 |
| 100 | $3.18 | $318,00 |
| 500 | $2.86 | $1.430,00 |
| 1.000 | $2.55 | $2.550,00 |
TDA5240 Descripción general
An RF receiver is a component of a wireless control link that demodulates low-power RF signals transmitted by remote key fobs or sensors and converts them into digital data for a host microcontroller. Within the system hierarchy, it sits between the antenna front end and the baseband MCU, forming the receive half of a sub-GHz wireless power-management chain that also includes an RF transmitter such as the Infineon TDA5100 or TDA5101.
Key features of the TDA5240 include up to 4 parallel parameter sets and up to 12 different frequency channels, autonomous receive mode that reduces host processor noise, improves sensitivity and lowers system power consumption, and several embedded encodings and modulation formats covering ASK and FSK. A data rate of up to 112 kcps supports fast RKE and TPMS protocols.
Architecturally, the device belongs to the Infineon SmartLEWIS RX family (together with TDA5235 and TDA5225) and integrates a low-IF receiver path with digital band-band processing, which is described by the manufacturer as a multi-channel quad-configuration receiver. The wide band coverage allows one hardware design to serve regional variants across North America, Europe and Asia without redesign.
Typical applications include remote keyless entry (RKE) receivers, tire pressure monitoring systems (TPMS), wireless remote controls, and home/industrial telemetry links operating in the sub-GHz ISM bands.
For design, take advantage of the autonomous receive mode to keep the host MCU in sleep while the TDA5240 polls for valid telegrams, cutting average system current; ensure supply design supports both 3.3 V and 5 V rails as the device is automotive-grade rated.
This page synthesizes distributor data, drop-in family alternatives, and design notes not found in the manufacturer datasheet.
Alternativas directas para TDA5240 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TDA5240 (mismo factor de forma y huella) — difiere en Package, Modulation, Product Type, Mounting Type, Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TDA5235XUMA1
✅ Sustitución directa✓ En stock
Consulte el precio
Ver hoja de datos →TDA5225
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA5230
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.28 / unidad
Ver hoja de datos →TDA5211
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
Consulte el precio
Ver hoja de datos →TDA5200
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.98 / unidad
Ver hoja de datos →TDA5240 Especificaciones
| Product Family | SmartLEWIS RX |
| Función | Wireless control receiver |
| Modulation | ASK, FSK |
| Frequency Bands | 300-320 MHz, 425-450 MHz, 863-870 MHz, 902-928 MHz |
| Sensitivity (FSK) | -118 dBm (typ.) |
| Sensitivity (ASK) | -116 dBm (typ.) |
| Maximum Data Rate | 112 kcps |
| Parallel Parameter Sets | 4 |
| Frequency Channels | Up to 12 |
| Tensión de alimentación | 3.3 V / 5 V |
| Grade | Automotive |
| Special Modes | Autonomous receive mode |
| Encapsulado | PG-TSSOP-28 |
| Tipo de montaje | Surface Mount |
| Packaging | Tape & Reel (T/R) |
Guía de configuración de pines de TDA5240 pg-tssop-28
Configuración de pines para TDA5240 (encapsulado pg-tssop-28). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para TDA5240.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
TDA5240 es adecuado para 6 aplicacións: Remote Keyless Entry (RKE) Receivers, Tire Pressure Monitoring Systems (TPMS), Wireless Remote Controls, Smart Home and IoT Sensor Links, Industrial Telemetry and SCADA Sensors, Security and Alarm Systems.
Remote Keyless Entry (RKE) Receivers
The TDA5240 fits RKE receiver modules because its typ. -118 dBm FSK sensitivity extends the usable link budget for compact key fobs with limited transmit power, and its 4 parallel parameter sets let one receiver unit handle multiple fob protocols or regional frequency plans (315 MHz / 433.92 MHz / 868 MHz). In the vehicle body controller, the TDA5240 connects to the antenna matching network and streams demodulated telegrams to the host MCU over SPI, while embedded decoding offloads protocol handling from the microcontroller. Using autonomous receive mode, the MCU stays in sleep until a valid telegram arrives, cutting standby current and reducing host-induced noise, which further improves real-world sensitivity. The 112 kcps data rate covers typical RKE telegrams with margin.
Recomendado
Tire Pressure Monitoring Systems (TPMS)
TPMS receiver nodes benefit directly from the TDA5240's -118 dBm FSK typical sensitivity, since tire sensors transmit very short, low-power bursts and every dB of receive sensitivity extends reception range around the vehicle. The 425-450 MHz band covers the common 433.92 MHz TPMS allocation, and the multi-channel capability lets the receiver hop across sensor channels to reduce collisions when multiple wheels transmit. Its automotive-grade classification matches under-hood and in-cabin environmental expectations, and the 3.3 V / 5 V supply flexibility simplifies integration into body-domain ECUs. With autonomous receive mode, the always-listening TPMS receiver maintains low average current draw between wheel-sensor telegrams, preserving vehicle battery life during long parking periods.
Recomendado
Wireless Remote Controls
Generic wireless remote control receivers in home automation, gate openers and industrial handsets use the TDA5240 for its wide band coverage (300-320 MHz, 425-450 MHz, 863-870 MHz, 902-928 MHz) and embedded encoding support, which accommodates legacy ASK remotes as well as newer FSK protocols. The up-to-12 channel capability lets a single receiver product SKU serve multiple regional markets, simplifying logistics. Because several embedded encodings and modulation formats are handled on-chip, a low-cost 8-bit MCU is sufficient as the host, reducing total BOM cost. The -116 dBm ASK typical sensitivity ensures reliable decoding even for low-cost remote transmitters with modest output power and imperfect antennas.
Recomendado
Smart Home and IoT Sensor Links
Sub-GHz ISM links in smart home sensors, door/window contacts and actuator receivers exploit the TDA5240's combination of -118 dBm sensitivity and low standby operation. Sub-GHz propagation penetrates walls better than 2.4 GHz, and the high sensitivity compensates for coin-cell-powered sensors transmitting milliwatt-level bursts. The four-band coverage lets OEMs ship the same receiver hardware in EU (868 MHz), US (915 MHz) and Asia (315/433 MHz) variants by selecting parameter sets in firmware. Embedded decoding reduces host MCU wake-ups, and autonomous receive mode keeps the gateway receiver responsive while the processor sleeps, achieving the low average current that battery and energy-harvesting powered nodes demand.
Recomendado
Industrial Telemetry and SCADA Sensors
Industrial telemetry nodes reporting tank levels, meter readings or machine status benefit from the TDA5240's robust link budget: typ. -118 dBm FSK sensitivity sustains communication across metal-rich factory floors where path loss is high. The 12-channel capability supports frequency-agile polling schemes that avoid interference from other ISM-band equipment, and multiple parameter sets allow coexistence of legacy ASK field devices alongside newer FSK nodes on one receiver. The automotive-grade quality level also translates to industrial temperature and reliability expectations. Integration is straightforward: SPI interface to the plant controller, external crystal and antenna matching network, and supply from either a 3.3 V logic rail or a 5 V industrial rail.
Recomendado
Security and Alarm Systems
Wireless security receivers for PIR sensors, door contacts and panic buttons demand both long battery-backed standby and guaranteed message reception - exactly the TDA5240's strengths. Its autonomous receive mode continuously polls for telegrams while the panel MCU sleeps, and the -116 dBm ASK / -118 dBm FSK sensitivity ensures edge-of-range sensors remain connected in large buildings. Supporting several embedded encodings allows the alarm receiver to accept devices from multiple sensor generations or third-party peripherals without firmware complexity. The quad-band coverage (315/433/868/915 MHz markets) means one receiver PCB serves global alarm-panel SKUs, and the 112 kcps data rate comfortably handles alarm telegrams with retransmission margin.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TDA5240 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TDA5235 | TDA5225 | TDA5230 |
|---|---|---|---|---|
| Package | PG-TSSOP-28 | PG-TSSOP-28 - same | PG-TSSOP-28 - same | PG-TSSOP-28 - same |
| Brand | Infineon | Infineon | Infineon | Infineon |
| Modulation | ASK / FSK | ASK / FSK | ASK / FSK | ASK / FSK |
Diferenciadores clave
- Highest channel flexibility in family (frente a TDA5235)
- Autonomous receive mode (frente a TDA5225)
- Class-leading sensitivity (frente a TDA5235)
Notas de diseño
The TDA5240 accepts a 3.3 V or 5 V supply per the Infineon datasheet, but RF performance parameters such as sensitivity and phase noise should be verified at the chosen rail in the electrical characteristics tables. Decouple AVDD pins with a combination of 100 nF ceramic placed within 2 mm of the pin plus a 1-10 uF bulk capacitor per supply domain. In automotive 5 V systems, add a series ferrite bead and a reverse-polarity/transient protection stage ahead of the receiver regulator, since load-dump and ISO pulses propagate along vehicle supply rails.
Keep the antenna matching network (typically a pi-network to 50 ohm) and crystal as close to the TDA5240 as possible, with a solid, uninterrupted ground plane directly beneath the RF section. Route the crystal traces short and shielded with ground guard rings to avoid pulling the reference oscillator. Separate the digital SPI lines from the RF front end; use vias to stitch the ground planes around the RF region. Follow the layout example in the SmartLEWIS RX datasheet application section, which shows the recommended TSSOP-28 land pattern and antenna feed arrangement.
When substituting family parts (TDA5235, TDA5225), remember the TDA5240-only features: 4 parallel parameter sets and up to 12 frequency channels do not exist on the reduced variants, so firmware that configures multiple parameter sets will fail on the substitutes. Also verify that firmware register maps match the exact device variant, and confirm the exact operating temperature range and current consumption figures in the manufacturer datasheet before releasing the power budget - do not assume values carried over from other SmartLEWIS parts.
Información de cumplimiento
Distributor data labels the part as 'Automotive' grade (AiPCBA listing), but formal AEC-Q100 qualification status and RoHS/REACH declarations were not present in the provided data - verify on the Infineon product page.
