TDA5240 - Multi-Band ASK/FSK RF Receiver -118dBm | Infineon
料号： TDA5240 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： TDA5240 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TDA5240 （相同外形与封装尺寸） ——差异在于 Package, Modulation, Product Type, Mounting Type, Architecture.
快速对比工具——选择替代料号进行并排对比：
TDA5235XUMA1
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →TDA5225
✅ 直接替换📋 参考替代料（不在目录中）
TDA5230
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.28 / 个
查看数据手册 →TDA5240 规格参数
| Product Family | SmartLEWIS RX |
| 功能 | 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 |
| 电源电压 | 3.3 V / 5 V |
| Grade | Automotive |
| Special Modes | Autonomous receive mode |
| 封装 | PG-TSSOP-28 |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (T/R) |
TDA5240 pg-tssop-28 引脚配置指南
TDA5240（pg-tssop-28 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TDA5240.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TDA5240 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TDA5240 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Highest channel flexibility in family （对比 TDA5235)
- Autonomous receive mode （对比 TDA5225)
- Class-leading sensitivity （对比 TDA5235)
设计说明
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.
合规信息
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.
