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

Product Attributes

Introduction

VG4455 is a low-power, high-performance 315MHz/433MHz short-distance wireless communication transmitter circuit that supports ASK modulation. All of its tuning can be done automatically in the chip. PLL and power amplifier circuits are integrated in the chip. VG4455 has the characteristics of low power consumption, wide operating voltage, and high output power. The VG4455 integrates PLL and power amplifier, where PLL provides carrier signal for the transmitter. The operating frequency of the PLL in the VG4455 is relatively low (433MHz and 315MHz), and the local oscillator signal provided by the ring oscillator is used. The fixed frequency division circuit is used in the loop, and the loop filter is built in. The overall power consumption is controlled below 1mA. The power amplifier amplifies the input signal, uses an opendrain output, and an external choke inductor structure. When applied, a π-type narrowband matching network is used to improve harmonic suppression and ensure that the output signal power is greater than 10dBm. VG4455 uses SOT23-6 package. The VG4455 short-distance wireless communication transmitter is used in the 315MHz~433MHz low-power, low -cost short-distance transceiver front end, supports ASK modulation, and is composed of a frequency synthesizer (PLL) and a power amplifier. The chip has high integration and low power consumption, and the transmission power reaches 12dBm. The VG4455 contains an enable control circuit. When D i n=1, the PLL and PA are in working state. When D i n=0, the PA is immediately turned off, and the PLL is delayed after about 40ms.

Features

• Operating voltage range: DC +1.8V ~ 5.0V
• Operating frequency range: 250MHz ~ 450MHz
• Operating current: 17Ma/12dBm(433MHz), 18Ma/12dBm(315MHz)
• Output power: ≤12dBm
• Current consumption in shutdown mode: <100nA
• Operating temperature range: -40°C ~ +120°C

Applications

• Remote control access control system
• Tire pressure monitoring equipment
• Remote control of fans and lighting switches
• Wireless sensor data transmission