Index > Product > 2.4 GHz Short Range Devices > A7115
Selection Guide
General Description
A7115 is a high performance and low cost 2.4GHz ISM band wireless transceiver. It integrates high sensitivity receiver (-90dBm @2Mbps), high efficiency power amplifier (up to 3dBm), frequency synthesizer and base-band modem. In typical system, A7115 is used together with MCU (microcontroller) with very few external passive components.

A7115 supports very fast settling time (90 us) for frequency hopping system. For packet handling, A7115 has built-in separated 32-bytes TX/RX FIFO for data buffering and burst transmission, CRC for error detection, FEC for 1-bit data correction per code word, RSSI for clear channel assessment, data whitening for data encryption/decryption, thermal sensor for monitoring relative temperature, WWS (wake up radio) function to support periodically wake up from sleep mode to RX mode and listen for incoming packets without MCU interaction. Those functions are very easy to use while developing a wireless system. All features are integrated in a small QFN 4X4 20 pins package.

A7115’s data rate is up to 2Mbps and can be easily programmed to 1Mbps or 2 Mbps via 3-wire or 4-wire SPI bus. For power saving, A7115 supports sleep mode, idle mode, standby mode. For easy-to-use, A7115 has an unique SPI command set called Strobe command that are used to control A7115’s state machine. Based on Strobe commands, from power saving, TX delivery, RX receiving, channel monitoring, frequency hopping to auto calibrations, MCU only needs to define A7115’s control registers and send Strobe commands via SPI bus. In addition, A7115 supports two general purpose I/O pins, GIO1 and GIO2, to inform MCU its status so that MCU could use either polling or interrupt scheme to do radio control. Therefore, it is very easy to monitor transmission between MCU and A7115 because of its digital interface.
 Small size (QFN 4X4, 20 pins).
 Support 2400 ~ 2483.5 MHz ISM band.
 FSK modulation.
 Programmable data rate to 1Mbps or 2Mbps.
 Low current consumption: RX 17mA, TX 15.7mA (at 0dBm output power).
 Low sleep current (1.5uA).
 Programmable RF output power -20dBm ~ 3dBm.
 Very High sensitivity (-90dBm@2Mbps, -92dBm@1Mbps).
 On chip regulator, supports input voltage 2.0 ~ 3.6V.
 Easy to use
 Support 3-wire or 4-wire SPI.
 Unique Strobe command via SPI.
 Change frequency channel by ONE register setting.
 8-bits Digital RSSI for clear channel indication.
 Fast exchange mode during TRX role switching.
 Auto RSSI measurement.
 Auto Calibrations.
 Auto IF function.
 Auto CRC Check.
 Auto FEC by (7, 4) Hamming code (1 bit error correction / code word).
 Data Whitening for encryption and decryption.
 Separated 32 bytes RX and TX FIFO.
 Easy FIFO / Segment FIFO.
 Support low cost crystal (6 / 8 /12 / 16MHz).
 Support low accuracy crystal within ± 50ppm.
 Support Auto Frequency Compensation.
 Support crystal sharing, (1 / 2 / 4 / 8MHz) to MCU.
 On chip low power RC oscillator for WWS / TWWS (wake up radio) function.
 Fast settling time (90 us) synthesizer for frequency hopping system.
 Built-in thermal sensor for monitoring relative temperature.
 Built-in Battery Detector.
2.4GHz ISM band Communication System
Wireless Intelligent sports
2.4GHz Remote Control
Wireless Toy
Wireless Keyboard and Mouse
Wireless Game Pad
Application Note
Reference circuit design (Module)
Reference code
Evaluation kit (EK)
Development Kit (DK)
Production test tool
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