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

Product Attributes

Introduction

A7129 is a monolithic low-IF architecture CMOS FSK/GFSK TRX for wireless applications in the 315/433/470/510/868/ 915MHz ISM bands. This device is especially suitable for battery-powered application and the 470MHz ~ 510MHz wireless AMR (Auto Meter Reading) in China and 868.3MHz wireless M-bus in Europe. A7129 is optimized for very low power consumption (i.e. 434MHz band, 3.8mA @ RX mode and 24 mA @ TX mode,10.5dBm). In addition, A7129 can offer a very good link budget with a high efficient class-E power amplifier up to 12 dBm and a low phase noise receiver (- 110 dBm RX sensitivity @ 100Kbps / FSK / 433.92MHz). Therefore, A7129 is very suitable for battery powered application with a nice LOS (line-of-sight) wireless range. A7129 incorporates a baseband modem with the programmable data rate divider from 2K to 250Kbps. For a battery powered system, A7129 supports fast PLL settling time (120 us), Xtal settling time (1100 us) and on-chip Regulator settling time (850 us) to reduce average power consumption. The RF synthesizer contains a VCO and a low noise fractional-N PLL with an output channel frequency resolution of 366 Hz. The VCO frequency operates at to the wanted radio frequency to cover all RF band. Since A7129 is a low-IF architecture TRX with programmable IFBW (IF Filter Bandwidth, 50 KHz/100 KHz/150 KHz/250 KHz), the RXLO shall be configured to offset an intermediate frequency (IF) to TXRF regarding to the IFBW setting. A7129’s control registers are accessed via 3-wire or 4-wire SPI interface including TX/RF FIFO, VCO frequency, to chip calibration procedures.

Applications

• ISM Band Data Communication
• Wireless Remote Controller
• RKE (Remote Keyless Entry)
• Building Automation
• Home Security
• Wireless Sensor Networking
• Energy Control and Management
• AMR (Auto Metering Reading)