LT5506 - LT5506是40MHz to 500MHz Quadrature Demodulator with VGA

LT5506是LINEAR凌力尔特公司的一款低功率收发器产品，LT5506是LT5506是40MHz to 500MHz Quadrature Demodulator with VGA，本站介绍了LT5506的封装应用图解、特点和优点、功能等，并给出了与LT5506相关的LINEAR元器件型号供参考。

LT5506 - LT5506是40MHz to 500MHz Quadrature Demodulator with VGA - 低功率收发器 - RF和无线 - 凌力尔特

LT5506 - 40MHz to 500MHz Quadrature Demodulator with VGA

LT5506 - 40MHz to 500MHz Quadrature Demodulator with VGA - Linear Technology（凌力尔特）

功能描述

The LT5506 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.

特点

Wide Range 1.8V to 5.25V Supply

Frequency Range: 40MHz to 500MHz

–4dB to 59dB Variable Power Gain

THD <0.12% (–58dBc) at 800mVP-P Differential Output Level

8.8MHz I/Q Lowpass Output Noise Filters

IF Overload Detector

Baseband I/Q Amplitude Imbalance: 0.2dB

Baseband I/Q Phase Imbalance: 0.6°

6.8dB Noise Figure at Max Gain

Input IP3 at Low Gain: – 0.5dBm

Low Supply Current: 27mA