LT5546 - LT5546是40MHz to 500MHz VGA and I/Q Demodulator with 17MHz Baseband Bandwidth

LT5546是LINEAR凌力尔特公司的一款低功率收发器产品，LT5546是LT5546是40MHz to 500MHz VGA and I/Q Demodulator with 17MHz Baseband Bandwidth，本站介绍了LT5546的封装应用图解、特点和优点、功能等，并给出了与LT5546相关的LINEAR元器件型号供参考。

LT5546 - LT5546是40MHz to 500MHz VGA and I/Q Demodulator with 17MHz Baseband Bandwidth - 低功率收发器 - RF和无线 - 凌力尔特

LT5546 - 40MHz to 500MHz VGA and I/Q Demodulator with 17MHz Baseband Bandwidth

LT5546 - 40MHz to 500MHz VGA and I/Q Demodulator with 17MHz Baseband Bandwidth - Linear Technology（凌力尔特）

功能描述

The LT5546 is a 40MHz to 500MHz monolithic integrated quadrature demodulator with variable gain amplifier (VGA) and 17MHz I/Q baseband bandwidth designed for low voltage operation. It supports standards that use a linear modulation format. The chip consists of a VGA, quadrature downconverting mixers and 17MHz lowpass noise filters (LPF). 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 -3dB corner frequency of the noise filters is approximately 17MHz and has a first order rolloff.? 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

17MHz I/Q Lowpass Output Noise Filters

Wide Range 1.8V to 5.25V Supply Voltage

Frequency Range: 40MHz to 500MHz

THD < 0.14% (-57dBc) at 800mVP-P Differential Output Level

IF Overload Detector

Log Linear Gain Control Range: -7dB to 56dB

Baseband I/Q Amplitude Imbalance: 0.2dB

Baseband I/Q Phase Imbalance: 0.6°

7.8dB Noise Figure at Max Gain

Input IP3 at Low Gain: -1dBm

Low Supply Current: 24mA