厂商：Freescale
类别：16位单片机
厂商：AKM
类别：数字音频ADC
厂商：Realtek
类别：D类音频放大器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Linear
类别：I/Q解调器
类别：数字电源管理器
我要询价我要收藏
特点Wide Range 1.8V to 5.25V SupplyFrequency Range: 40MHz to 500MHz–4dB to 59dB Variable Power Gain THD <0.12% (–58dBc) at 800mV P-P Differential Output Level 8.8MHz I/Q Lowpass Output Noise FiltersIF Overload DetectorBaseband I/Q Amplitude Imbalance: 0.2dBBaseband I/Q Phase Imbalance: 0.6°6.8dB Noise Figure at Max GainInput IP3 at Low Gain: – 0.5dBmLow Supply Current: 27mALow Delay Shift Over Gain Control Range: 2ps/dBOutputs Biased Up While in Standby16-Lead QFN 4mm x 4mm Package with Exposed Pad典型应用典型应用描述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.