Index > Product > 2.4 GHz Short Range Devices > A7325
Selection Guide
General Description
A7325 is a high performance and low cost 2.4GHz ISM band wireless transmitter. This device integrates high efficiency power amplifier (up to 5dBm). According to Data Rate Register, on-air data rates could be configured from 2Kbps to 2Mbps. In RX site, user can choose either A7105 (2K ~ 500Kbps TRX) or A7125 (1Mbps / 2Mbps TRX) to complete a one-way wireless system.

A7325 supports fast settling time (130 us) for frequency hopping system. For packet handling, A7325 has built-in 64-bytes TX FIFO (could be extended to 256 bytes) for data buffering and burst transmission, CRC for error detection, FEC for 1-bit data correction per code word, data whitening for data encryption / decryption. Those functions are very easy to use while developing a wireless system. All features are integrated in a small QFN 4X4 16 pins package.

A7325’s control registers can be easily accessed via 3-wire or 4-wire SPI bus. For power saving, A7325 supports sleep mode,idle mode, standby mode. For easy-to-use, A7325 has an unique SPI command set called Strobe command that are used to control internal state machine. Based on Strobe commands via SPI bus, MCU can control everything from power saving, TX delivery, frequency hopping to auto calibrations. In addition, A7325 supports one general purpose I/O pin, GIO1, to inform MCU its status so that MCU could use either polling or interrupt scheme to do radio control. Hence, it is very easy to monitor radio transmission between MCU and A7325 because of its digital interface.
Small size (QFN4 X4, 16 pins).
Frequency band: 2400 ~ 2483.5MHz.
FSK or GFSK modulation
Deep sleep current (0.1 uA).
Sleep mode current (2 uA).
Low current consumption: TX 14.5mA (at 0dBm output power).
Low current consumption: TX 16.5mA (at 5dBm output power).
On chip regulator, support input voltage 2.0 ~ 3.6 V.
Programmable data rate from 2Kbps to 2Mbps.
Programmable TX power level from – 17 dBm to 5 dBm.
Fast settling time (130 us) synthesizer for frequency hopping system.
Built-in Battery Detector.
Support low cost crystal ( 8 /12 / 16 / 24MHz).
Support crystal sharing, (1 / 2 / 4 / 8MHz) to MCU.
Easy to use.
Support 3-wire or 4-wire SPI.
Unique Strobe command via SPI.
ONE register setting for new channel frequency.
Auto Calibrations.
Auto CRC.
Auto FEC by (7, 4) Hamming code (1 bit error correction / code word).
Data Whitening for encryption and decryption.
64 bytes TX FIFO.
Easy FIFO / Segment FIFO / FIFO Extension (up to 256 bytes).
Support direct mode data input to GIO1 pin.
Wireless toys and game controllers
Remote control
Helicopter and airplane radio controller
2400 ~ 2483.5 MHz ISM system
Wireless audio streaming
Wireless video streaming
Application Note
Reference circuit design (Module)
Reference code
Evaluation kit (EK)
Development Kit (DK)
Production test tool
*Please contact the agents or sales for more details