This product is a 433MHz ultra-low power RF transceiver with a tiny package size and low power consumption, which can be used for a variety of industrial and commercial applications. The main features include: minimal external circuitry requirements, adjustable output power, high FSK sensitivity, high ASK sensitivity, ASK/FSK receiver uses a low-IF architecture, transmitter uses a closed loop fractional-N synthesizer for FSK modulation, crystal tolerances are compensated by a fractional-N synthesizer with 800Hz RF resolution, supply voltage range is 2.4V to 3.6V or 4.4V to 6.6V, temperature range is -40°C to +105°C, low supply current is 10.5mA in RX and TX mode (3V/TX with 5dBm).
The ATA5811/ATA5812 is a highly integrated UHF ASK/FSK single‑channel half‑duplex transceiver offered in a compact 7 × 7 mm QFN48 package. It delivers adjustable output power from 0 to 10 dBm, high PA efficiency (up to 38 %), and operates over a wide supply voltage range (2.4 V–3.6 V or 4.4 V–6.6 V) with low current consumption (10.5 mA in RX/TX). The device supports data rates from 1 kBaud to 20 kBaud (FSK) and 1 kBaud to 10 kBaud (ASK) and works in the 433 MHz, 868 MHz and 315 MHz bands.
Typical applications include automotive keyless entry, remote‑control systems, alarm and telemetry, energy metering, and home automation. The manual details pin descriptions, block diagrams, and example circuits for one‑battery and two‑battery key‑fob designs as well as base‑station implementations, helping designers integrate the transceiver with minimal external components.
| Adjustable Output Power | 0 to 10 dBm |
|---|---|
| PA Efficiency | up to 38 % |
| Supply Voltage Range | 2.4 V‑3.6 V or 4.4 V‑6.6 V |
| Temperature Range | -40 °C to +105 °C |
| Low Supply Current | 10.5 mA in RX and TX mode |
| Data Rate (FSK / ASK) | 1‑20 kBaud (FSK), 1‑10 kBaud (ASK) |
| Package | 7 × 7 mm QFN48 |
| Supported Frequency Bands | 433.92 MHz, 868.3 MHz, 315 MHz |
It can be powered from 2.4 V to 3.6 V or from 4.4 V to 6.6 V.
ASK supports 1 kBaud to 10 kBaud, while FSK supports 1 kBaud to 20 kBaud.
The output power is adjustable from 0 dBm up to 10 dBm.
The device draws about 10.5 mA in both RX and TX modes.