供应低功率收发器(RF 解调器)LT5546

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

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
  • Low Delay Shift Over Gain Control Range: 2ps/dB
  • Outputs Biased Up While in Standby
  • 16-Lead QFN 4mm × 4mm Package with Exposed Pad

典型应用:

描述:

功能 : 解调器
LO 频率 : 80MHz ~ 1GHz
RF 频率 : 40MHz ~ 500MHz
噪音数据 : 7.8dB
电流 - 电源 : 24mA
电源电压 : 1.8 V ~ 5.25 V
封装/外壳 : 16-WQFN 裸露焊盘
包装 : 带卷 (TR)

The LT®5546 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

应用

  • GPS IF Receivers
  • Satellite IF Receivers
  • VHF/UHF Receivers
  • Wireless Local Loop

型号/规格

LT5546EUF#TR,LT5546EUF,5546

品牌/商标

LT