LT5506数据手册RF/IF射频/中频RFID的RF解调器规格书PDF

描述 Description

The LT®5506 is a 40MHz to 500MHz monolithic integrated quadrature demodulator with variable gain amplifier (VGA), designed for low voltage operation. It supports standards that use a linear modulation format. The chip consists of a VGA, quadrature down-converting mixers and lowpass noise filters. The LO port consists of a divide-by-two stage and LO buffers. The IC provides all building blocks for IF down-conversion to I and Q baseband signals with a single supply voltage of 1.8V to 5.25V. The VGA gain has a linear-in- dB relationship to the control input voltage. Hard-clipping amplifiers at the mixer outputs reduce the recovery time from a signal overload condition. The lowpass filters reduce the out-of-band noise and spurious frequency components. The cut-off frequency of the noise filters is approximately 8.8MHz. The external 2xLO frequency is required to be twice the IF input frequency for the mixers. The standby mode provides reduced supply current and fast transient response into the normal operating mode when the I/Q outputs are AC-coupled to a baseband chip.

特性 Features

• 1.8V 至 5.25V 的宽范围电源
• 频率范围：40MHz 至 500MHz
• –4dB 至 59dB 可变功率增益
• THD P-P 差分输出电平)
• 8.8MHz I/Q 低通输出噪声滤波器
• IF 过载检测器
• 基带 I/Q 幅度不平衡：0.2dB
• 基带 I/Q 相位不平衡：0.6°
• 6.8dB 噪声指数 (在最大增益)
• 输入 IP3 (在低增益)：–0.5dBm
• 低电源电流：27mA
• 在整个增益控制范围内具有低延迟移位：2ps/dB
• 在待用模式中输出偏压上升
• 具裸露衬垫的 16 引脚 4mm x 4mm QFN 封装

应用 Application

• IEEE802.11
• 高速无线 LAN
• 无线本地环路

简介

LT5506属于RF/IF射频/中频RFID的RF解调器。由制造生产的LT5506RF 解调器RF 解调器是设计用于从调制波中提取信号的器件，调制波则是通过使用频率、幅度、相位、放大器或位移器而改变的波。