RF Amplifier

Attenuators

Phase Locked Loops - PLL PLL/VCO MCM (9.6-10.8 GHz)

RF Amplifier

The ADF4108 frequency synthesizer can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. It consists of a low-noise digital PFD (phase frequency detector), a precision charge pump, a programmable reference divider, programmable A and B counters, and a dual-modulus prescaler (P/P + 1). The A (6-bit) and B (13-bit) counters, in conjunction with the dual-modulus prescaler (P/P + 1), implement an N divider (N = BP + A). In addition, the 14-bit reference counter (R counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (phase-locked loop) can be implemented if the synthesizer is used with an external loop filter and VCO (voltage controlled oscillator). Its very high bandwidth (8GHz) means that frequency doublers or prescalers can be eliminated in many high frequency systems, simplifying system architecture and reducing cost.APPLICATIONS Broadband wireless access Satellite systems Instrumentation Wireless LANs Base stations for wireless radio

The LTC5577 active mixer is optimized for RF downconverting applications that require high input signal handling capability and wide bandwidth. The wideband IF output uses external resistors to set the output impedance, allowing the flexibility to match directly into differential IF loads, such as filters and amplifiers. The part is characterized and specified with a 100Ω differential output impedance, although it can be used with output impedances ranging from 50Ω to 400Ω, with higher gain and reduced IIP3 and P1dB at the higher impedance levels. The IF output is usable up to 1.5GHz.In receiver applications, the high input P1dB and IIP3 allow the use of higher gain low noise amplifiers, resulting in higher receiver sensitivity. Integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces, while minimizing the solution size.Applications Wireless Infrastructure Receivers DPD Observation Receivers CATV Infrastructure

The HMC996LP4E is a GaAs PHEMT MMIC analog variable gain amplifier and / or driver amplifier which operates between 5 and 12 GHz. Ideal for microwave radio applications, the amplifier provides up to 18.5 dB of gain, output P1dB of up to +23 dBm, and up to +34 dBm of output IP3 at maximum gain, while requiring only 170 mA from a +5V supply. Gain control voltage pin (Vctrl) is provided to allow variable gain control up to 22 dB. Gain flatness is excellent making the HMC996LP4E ideal for EW, ECM and radar applications. The HMC996LP4E is housed in a RoHS compliant 4 x 4 mm QFN leadless package and is compatible with high volume surface mount manufacturing.Applications Point-to-Point Radio Point-to-Multi-Point Radio EW & ECM Subsystems  X-Band Radar Test Equipment & Sensors

The HMC273AMS10G(E) is a general purposebroadband 5-Bit positive control GaAs IC digitalattenuator in a 10 lead MSOP plastic package.Covering 0.7 to 3.8 GHz, the insertion loss is typicallyless than 3 dB. The attenuator bit values are1 (LSB), 2, 4, 8, and 16 dB for a total attenuationof 31 dB. Accuracy is excellent at ±0.2 dB typicalwith an IIP3 of up to +46 dBm. Five bit control voltageinputs, toggled between 0 and +3 to +5 volts, areused to select each attenuation state. A single Vddbias of +3 to +5 volts applied through an external5K Ohm resistor is required.Applications Cellular; UMTS/3G infrastructure ISM, MMDS, WLAN, WiMAX Microwave radio & VSAT Test equipment and sensors

The HMC1049 is a GaAs MMIC low noise amplifier (LNA) that operates between 0.3 GHz and 20 GHz. This LNA provides 16 dB of small signal gain, a 1.7 dB noise figure, and an Output IP3 of 27 dBm, requiring only 70 mA from a 7 V supply. The P1dB output power of 16 dBm enables the LNA to function as a local oscillator (LO) driver for balanced, I/Q or image rejection mixers. VDD can be applied to Pad 2 with VDD = 7 V or to Pad 4 with VDD = 4 V. Pad 4 requires a bias tee. The HMC1049 is also internally matched to 50 Ω for ease of integration into multichip modules (MCMs). All data is taken with the chip in a 50 Ω test fixture connected via 0.025 mm (1 mil) diameter wire bonds of 0.31 mm (12 mil) length.Applications Point-to-point radios Point-to-multipoint radios Military and space Test instrumentation

The HMC1097LP4E is a low noise, high linearity Direct Quadrature Modulator RFIC which is ideal for digital modulation applications from 0.1 to 6.0 GHz including; Cellular/3G, WiMAX/4G, Broadband Wireless Access & ISM circuits. Housed in a compact 4x4 mm (LP4) SMT QFN package, the RFIC requires minimal external components & provides a low cost alternative to more complicated double upconversion architectures. The RF output port is single-ended and matched to 50 Ohms with no external components. The LO requires -6 to +6 dBm and can be driven in either differential or single-ended mode. This device is optimized for a +5V supply, and offers improved carrier feedthrough and sideband suppression characteristics.APPLICATIONS UMTS, GSM or CDMA Basestations Fixed Wireless or WLL ISM Transceivers, 900 & 2400 MHz GMSK, QPSK, QAM, SSB Modulators Cellular/3G and WiMAX/4G