The LTC6900 is a precision, low power oscillator that is easy to use and occupies very little PC board space. The oscillator frequency is programmed by a single external resistor (RSET). The LTC6900 has been designed for high accuracy operation (?1.5% frequency error) without the need for external trim components. The LTC6900 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. The frequency-setting resistor can vary from 10k? to 2M? to select a master oscillator frequency between 100kHz and 20MHz (5V supply). The three-state DIV input determines whether the master clock is divided by 1, 10 or 100 before driving the output, providing three frequency ranges spanning 1kHz to 20MHz (5V supply). The LTC6900 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency. TApplications Portable and Battery-Powered Equipment PDAs Cell Phones Low Cost Precision Oscillator Charge Pump Driver Switching Power Supply Clock Reference Clocking Switched Capacitor Filters Fixed Crystal Oscillator Replacement Ceramic Oscillator Replacement

The HMC384LP4(E) is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO with integrated resonator, negative resistance device, varactor diode, and buffer amplifier. The VCO?s phase noise performance is excellent over temperature, shock, vibration and process due to the oscillator?s monolithic structure. Power output is 3.5 dBm typical from a 3V supply voltage. The voltage controlled oscillator is packaged in a low cost leadless QFN 4x4 mm surface mount package.APPLICATIONS Wireless Infrastructure Industrial Controls Test Equipment Military

The HMC390LP4(E) is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO with integrated resonator, negative resistance device, varactor diode, and buffer amplifier. Covering 3.55 to 3.9 GHz, the VCO?s phase noise performance is excellent over temperature, shock, vibration and process due to the oscillator?s monolithic structure. Power output is 4.7 dBm typical from a single supply of 3V @ 42 mA. The voltage controlled oscillator is packaged in a low cost leadless QFN 4?4 mm surface mount package.APPLICATIONS Wireless Local Loop (WLL) VSAT & Microwave Radio Test Equipment & Industrial Controls Military

The HMC429LP4(E) is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO with an integrated resonator, negative resistance device, varactor diode, and buffer amplifier. Covering 4.45 to 5.0 GHz, the VCO?s phase noise performance is excellent over temperature, shock, vibration and process due to the oscillator?s monolithic structure. Power output is 4 dBm typical from a single supply of 3V @ 30mA. The voltage controlled oscillator is packaged in a low cost leadless QFN 4x4 mm surface mount package.APPLICATIONS 802.11a, HiperLAN WLAN VSAT, UNII & Microwave Radio Test Equipment & Industrial Controls Military

The HMC505LP4(E) is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO with an integrated resonator, negative resistance device, varactor diode, and buffer amplifier. Covering 6.8 to 7.4 GHz, the VCO?s phase noise performance is excellent over temperature, shock and vibration due to the oscillator?s monolithic structure. Power output is +11 dBm typical from a single supply of +3V @ 80 mA. The voltage controlled oscillator is packaged in a leadless QFN 4x4 mm surface mount package.APPLICATIONS VSAT & Microwave Radio Test Equipment & Industrial Controls Military

The HMC582LP5(E) is a GaAs InGaP Herterojunction Bipolar Transistor (HBT) MMIC VCOs. The HMC582LP5(E) integrates resonators, negative resistance devices, varactor diodes and feature half frequency and divide-by-4 outputs. The VCO's phase noise performance is excellent over temperature, shock and process due to the oscillator's monolithic structure.Power output is +9 dBm typical from a +5V supply voltage. The prescaler and RF/2 functions can be disabled to conserve current if not required. The voltage controlled oscillator is packaged in a leadless QFN 5?5 mm surface mount package, and requires no external matching components.APPLICATIONS Point-to-Point Radios Point-to-Multi-Point Radios Test Equipment & Industrial Controls SATCOM Military End-Use

The HMC701LP6CE is a SiGe BiCMOS fractional-N frequency synthesizer. The synthesizer includes a 8GHz 16-bit RF N-Divider, a 24-bit delta-sigma modulator, a very low noise digital phase frequency detector (PFD), and a precision controlled charge pump. In addition the synthesizer supports an external step tuned VCO.The fractional synthesizer features an advanced delta-sigma modulator design that allows ultra-fine frequency step sizes. The synthesizer features the ability to alter both the phase-frequency detector (PFD) gain and the cycle slipping characteristics of the PFD. This feature can reduce the time to arrive at the new frequency by 50% vs. conventional PFDs. Ultra low in-close phase noise also allows wider loop bandwidths for faster frequency hopping.The synthesizer contains a built-in linear sweeper function, which allows it to perform frequency chirps with a wide variety of sweep times, polarities and dwells, all with an external or automatic sweep trigger.A General Purpose Output (GPO) bus supports the use of multiple VCOs. In addition the synthesizer has a number of auxiliary clock generation modes that can be accessed via the GPO.Applications Base Stations for Mobile Radio (GSM, PCS, DCS, CDMA, WCDMA) Wireless LANs, WiMax Communications Test Equipment CATV Equipment FMCW Sensors Automotive Radar Phased-Array Systems

The HMC698LP5(E) is a frequency synthesizer with a wideband reversible polarity digital PFD and lock detect output. The divider operates unconditionally from 80 - 7000 MHz with a continuous integer division ratio of 12 to 259. The HMC698LP5(E) high frequency operation along with ultra low phase noise floor make possible synthesizers with wide loop bandwidth and low N resulting in fast settling and very low phase noise. When used in conjunction with a differential loop filter, the HMC698LP5(E) can be used to phase lock a VCO to a reference oscillator.Applications Satellite Communication Systems Point-to-Point Radios Military Applications Sonet Clock Generation

The HMC736 is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO. The HMC736 integrates a resonator, negative resistance device, varactor diode and feature half frequency output. The VCO's phase noise performance is excellent over temperature, shock, and process due to the oscillator's monolithic structure. Power output is +9 dBm typical from a +4.2V supply voltage. The voltage controlled oscillator is packaged in a leadless QFN 4?4 mm surface mount package, and requires no external matching components.APPLICATIONS Point-to-Multi-Point Radios Test Equipment & Industrial Controls SATCOM Military End-Use

The HMC778LP6CE is a fully functioned Fractional-N Phase-Locked-Loop (PLL) Frequency Synthesizer with an integrated Voltage Controlled Oscillator (VCO). The input reference frequency range is DC to 350 MHz while the advanced delta-sigma modulator design in the fractional synthesizer allows both ultra-fine step sizes and very low spurious products. The highly integrated structure provides excellent phase noise performance over temperature, shock and process. In addition, the HMC778LP6CE offers frequency sweep and modulation features, external triggering, double-buffering, exact frequency control, phase modulation and more. The HMC778LP6CE is packaged in a leadless QFN 6 x 6 mm surface mount package.For theory of operation and register map refer to the 'PLLs w/ Integrated VCO - Microwave VCOs' Operating Guide.Applications VSAT Radio Microwave Point-To-Point Radios Test Equipment & Industrial Control Military End-Use Phased Array Applications FMCW Radar Systems