The HMC739 is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO. The HMC739 integrates a resonator, negative resistance device, varactor diode and divide-by-16 prescaler. The VCOs phase noise performance is excellent over temperature, shock, and process due to the oscillator's monolithic structure. Power output is +8 dBm typical from a 5V supply voltage. The voltage controlled oscillator is packaged in a low cost leadless QFN 4x4 mm surface mount package.APPLICATIONS Point-to-Point Radios Point-to-Multi-Point Radios/LMDS VSAT

VCO SMT with Fo/2 & Divide-by-4, 11.5 - 12.8 GHz Features: Dual Output: Fo = 11.5 - 12.8 GHz Fo/2 = 5.75 - 6.4 GHz Pout: +11 dBm Phase Noise: -110 dBc/Hz @100 kHz Typ. No External Resonator Needed QFN Leadless SMT Package, 25 mm2

Wideband VCO SMT w/Buffer Amplifier, 10 - 20 GHz Features: Wide Tuning Bandwidth Pout: +3 dBm Low SSB Phase Noise: -90 dBc/Hz @100 kHz No External Resonator Needed Single Positive Supply: +5V @ 70 mA 24 Lead 4x4mm SMT Package: 16mm2

VCO, W/BUFFER AMP, 3.9-4.45GHZ, QFN24 ROHS COMPLIANT: YES

VCO, W/HALF FREQ O/P, 10.6-11.8GHZ, QFN ROHS COMPLIANT: YES

VCO, W/HALF FREQ O/P, 12.5-13.9GHZ, QFN ROHS COMPLIANT: YES

VCO, W/BUFFER AMP, 6-12GHZ, QFN24 ROHS COMPLIANT: YES

Wideband VCO SMT w/Buffer Amplifier, 10 - 20 GHz Features: Wide Tuning Bandwidth Pout: +3 dBm Low SSB Phase Noise: -90 dBc/Hz @100 kHz No External Resonator Needed Single Positive Supply: +5V @ 70 mA 24 Lead 4x4mm SMT Package: 16mm2

VCO Oscillators VCO with Divide-by-4, 10.5 - 12.2 GHz

The AD2S99 programmable sinusoidal oscillator provides sine wave excitation for resolvers and a wide variety of ac transducers.The AD2S99 also provides a synchronous reference output signal (3 VP-P square wave) that is phase locked to its SIN and COS inputs. In an application, the SIN and COS inputs are connected to the transducer’s secondary windings. The synchronous reference output compensates for temperature and cabling dependent phase shifts and eliminates the need for external preset phase compensation circuits. The synchronous reference output can be used as a zero crossing reference for resolver-to-digital converters such as Analog Devices’ AD2S80A, AD2S82A, AD2S83 and AD2S90.The AD2S99 is packaged in a 20-pin PLCC and operates over –40ºC to +85ºC.PRODUCT HIGHLIGHTS Dynamic Phase Compensation The AD2S99 dynamically compensates for any phase variation in a transducer by phase locking its synchronous reference output to the transducer’s secondary windings. Programmable Excitation Frequency The excitation frequency is easily programmed to 2 kHz, 5 kHz, 10 kHz, or 20 kHz by using the frequency select pins. Intermediate frequencies are available by adding an external resistor. Signal Loss Detection The AD2S99 has the ability to detect if both the transducer secondary winding connections become disconnected from its SIN and COS inputs. The “LOS” output pin pulls high when a signal loss is detected. Integration The AD2S99 integrates the transducer excitation, synchronous reference, and loss of signal detection functions into a small, cost effective package.APPLICATIONSExcitation Source for: Resolvers Synchros LVDTs RVDTs Pressure Transducers Load Cells AC Bridges