آر اف (فرکانس رادیویی) و بی‌سیم آی سی‌ فرستنده‌گیرنده آر اف

Product Attributes

Introduction

Si24R2E is a wireless transmission chip with embedded transmission baseband, operating in the 2.45GHz ISM frequency band, suitable for ultra - low power active RFID applications, integrated embedded 2.45GHz wireless RF transmitter, 128 programmable NVM memory, automatic transmission controller etc. The operating frequency band from 2400MHz to 2525MHz is divided into 126 RF channels. Integrated high PSRR LDO supply ensures that Si24R2E is stable within a wide voltage range of 1.9 - 3.6V. Si24R2E uses GFSK digital modulation and demodulation. The air data rate can be programmed to 2Mbps, 1Mbps and 250Kbps. The higher data rate contributes the lower power consumption because it takes less time to transmit or receive signals. The output power of Si24R2E can be adjusted and it can base on actual application to configure the appropriate output power, thus saving the power of system. Si24R2E is especially optimized for low power applications. All the register values and FIFO values are maintained in Shutdown mode and the shutdown supply current is 700nA. In Standby mode, the clock still works and the standby supply current is 15uA. It takes less than 130us to start data transmitting. When Si24R2E enables automatic transmission function, internal watchdog and internal RCOSC clock works, internal timer starts timing and the chip works in Sleep state with only 700nA standby current. When internal timer is full, automatic transmission controller loads and transmits the data of NVM automatically. After transmitting data, chip enters Sleep state. The average power consumption of Si24R2E is very low, especially suitable for the application system of button cell power supply. Si24R2E is easy to use, and it can automatically load and transmit data without external MCU. NVM memory can store the configuration of registers and data transmitted. The data will not be lost after power failure and can be maintained.

Features

• 2.4GHz ISM band operation
• Built - in 128 programmable NVM memory
• Ultra - low power automatic transmission
• Low voltage automatic alarm function
• Tamper alarm function
• Integrated conflict prevention communication mechanism
• Built - in 3KHz RCOSC and hardware watchdog
• 3.3V programming voltage
• Modulation: GFSK
• Data rate: 2Mbps/1Mbps/250Kbps
• Ultra low shutdown current: 700nA
• Ultra low standby current: 15uA
• Start - up time: ≤ 130uS
• Wide supply range: 1.9 - 3.6V
• Wide digital I/O voltage range: 1.9 - 5.25V
• Low - cost Crystal: 16MHz±60ppm
• Maximum transmission power: 7dBm
• TX supply current (2Mbps): 13.5mA (0dBm)
• Maximum 10MHz, 4 - pin hardware SPI
• Transmit data hardware interrupt output
• QFN20 package
• Compatible with Si24R1 and Si24R2 transmission function

Applications

• Ultra low power active RFID system
• Smart campus card management system