概览
SX1231J 是一款符合 ARIB 标准的高度集成射频收发器芯片，可在所有日本 sub-GHz 频段上运行。它具备高度集成的数字架构，最大限度地减少了外部组件，并为优化系统参数和性能提供了灵活性。高灵敏度和卓越的阻断性能与优化后的 IIP3 相结合，在最恶劣的环境中最大限度地扩大覆盖范围。
功能
- 灵敏度高：1.2 kbps 时低至 -120 dBm
- 高可选性：25kHz 偏置时为 42dB
- 防弹前端：IIP3 = -18dBm、IIP2 = +35dBm，80dB 阻断抗扰性，无图像频率响应
- 低电流接收模式：16 mA
- 低电流睡眠模式，保持寄存器时为 100 nA
- 可编程 TX 功率：-18dBm 至 +17dBm，每档 1dB
- 在 VDD 电压范围内可提供恒定的射频性能
- FSK 比特率高达 300 kb/s
- 高度集成的合成器，分辨率 61 Hz
- FSK、GFSK、MSK、GMSK 和 OOK 调制
- 内置位同步器，可用于时钟恢复
- 输入同步文字识别
- 115 dB 以上动态范围 RSSI
- 自动射频感应与超快速 AFC
- 使用 CRC、AES-128 和 66 字节 FIFO 的封包引擎
- 内置温度传感器和低电量指示灯
- 无铅、无卤素，且符合 RoHS/WEEE 标准
| 文档 | Release Date | Type |  |
|---|---|---|---|
| SX1231J Data sheet | 2019-11-12 | | |
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