MAX2871ETJ+ Maxim (美信) 鎖相環(PLLs)
產品概述
MAXIM INTEGRATED PRODUCTS MAX2871ETJ+ 振蕩器
TheMAX2871ETJ+is a 23.5MHz to 6000MHz fractional/integer-N synthesizer/VCO in 32 pin TQFN package. It is an ultra wideband phase locked loop (PLL) with integrated voltage control oscillator (VCO). It is capable of operating in both integer-N and fractional-N modes. The MAX2871 is a high performance frequency synthesizer capable of synthesizing frequencies from 23.5MHz to 6GHz while maintaining superior phase noise and spurious performance when combined with an external reference oscillator and loop filter. It has divider ratios of 1/2/4/8/16/32/64/128. The ultra wide frequency range is achieved with help of multiple integrated VCOs covering 3000MHz to 6000MHz and output dividers ranging from 1 to 128. The device also provides dual differential output drivers which can be independently programmed to deliver -1dBm to +8dBm differential output power. The MAX2871 is controlled by a 3-wire serial interface and is compatible with 1.8V control logic.
. Supply voltage range from 3V to 3.6V . Operating temperature range from -40°C to 85°C . Output binary buffers/dividers enable extended frequency range . Maximum output power of 5dBm and minimum output power of -4dBm (fRFOUT= 3000MHz) . High performance phase frequency detector (PFD) and reference frequency reduces spectral noise . Phase detector frequency up to 140MHz and reference frequency up to 210MHz . Low normalized in-band phase noise of -230dBc/Hz, reduces system noise floor contribution . Manual or automatic VCO selection permits fast switching . Output phase reset and adjustment allows synchronization of multiple synthesizers . On-chip temperature sensor with 7bit ADC ensures optimum VCO selection
