The LTC3872-1 is a constant frequency current mode boost DC/DC controller that drives an N-channel power MOSFET and requires very few external components. The No RSENSE? architecture eliminates the need for a sense resistor, improves efficiency and saves board space.The LTC3872-1 provides excellent AC and DC load and line regulation with ?1.5% output voltage accuracy. It incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2.3V.LTC3872-1 has the same functionality as the standard LTC3872 except that it has no frequency foldback in current limit.High switching frequency of 550kHz allows the use of a small inductor. The LTC3872-1 is available in an 8-lead low profile (1mm) ThinSOT? package and 8-pin 2mm ? 3mm DFN package. LTC3872 LTC3872-1 Frequency Foldback In Current Limit Yes No Applications Telecom Power Supplies 42V Automotive Systems 24V Industrial Controls IP Phone Power Supplies

DC994A: Demo Board for the LT3003 3-Channel LED Ballaster with PWM.

The LTC2208 is a 130Msps, sampling 16-bit A/D converter designed for digitizing high frequency, wide dynamic range signals up to input frequencies of 700MHz. The input range of the ADC can be optimized with the PGA front end.The LTC2208 is perfect for demanding communications applications, with AC performance that includes 78dBFS Noise Floor and 100dB spurious free dynamic range (SFDR). Ultra low jitter of 70fsRMS allows undersampling of high input frequencies with excellent noise performance. Maximum DC specs include ?4LSB INL, ?1LSB DNL (no missing codes) over temperature.The digital output can be either differential LVDS or single-ended CMOS. There are two format options for the CMOS outputs: a single bus running at the full data rate or demultiplexed buses running at half data rate. A separate output power supply allows the CMOS output swing to range from 0.5V to 3.3V.The ENC+ and ENC? inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed with a wide range of clock duty cycle. Bits LTC2208-14 14 LTC2208-16 16 Applications Telecommunications Receivers Cellular Base Stations Spectrum Analysis Imaging Systems ATE

The LTC2208-14 is a 130Msps, sampling 14-bit A/D converter designed for digitizing high frequency, wide dynamic range signals with input frequencies up to 700MHz. The input range of the ADC can be optimized with the PGA front end.The LTC2208-14 is perfect for demanding communications applications, with AC performance that includes 77.1dBFS Noise Floor and 98dB spurious free dynamic range (SFDR). Ultralow jitter of 70fsRMS allows undersampling of high input frequencies with excellent noise performance. Maximum DC specs include ?1.5LSB INL, ?0.5LSB DNL (no missing codes).The digital output can be either differential LVDS or single-ended CMOS. There are two format options for the CMOS outputs: a single bus running at the full data rate or demultiplexed buses running at half data rate. A separate output power supply allows the CMOS output swing to range from 0.5V to 3.6V.The ENC+ and ENC? inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed with a wide range of clock duty cycles. Bits LTC2208-14 14 LTC2208-16 16 Applications Telecommunications Receivers Cellular Base Stations Spectrum Analysis Imaging Systems ATE

The AD5758 is a single-channel, voltage and current output digital-to-analog converter (DAC) that operates with a power supply range from ?33 V (minimum) on AVSS to +33 V (maximum) on AVDD1 with a maximum operating voltage between the two rails of 60 V. On-chip dynamic power control (DPC) minimizes package power dissipation, which is achieved by regulating the supply voltage (VDPC+) to the VIOUT output driver circuitry from 5 V to 27 V using a buck dc-to-dc converter, optimized for minimum on-chip power dissipation. The CHART pin enables a HART? signal to be coupled onto the current output.The device uses a versatile 4-wire serial peripheral interface (SPI) that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI?, MICROWIRE?, DSP, and microcontroller interface standards. The interface also features an optional SPI cyclic redundancy check (CRC) and a watchdog timer (WDT). The AD5758 offers improved diagnostic features from its predecessors, such as an integrated 12-bit diagnostic analog-to-digital converter (ADC). Additional robustness is provided by the inclusion of a line protector on the VIOUT, +VSENSE, and ?VSENSE pins. When used with its companion power management unit (PMU)/isolator (ADP1031), the AD5758 is capable of enabling customers to develop an eight channel to channel isolated analog output module with less than 2 W power dissipation, while meeting CISPR 11 Class B. Product Highlights DPC, using an integrated buck dc-to-dc converter for thermal management. When used with the ADP1031, the AD5758 enables eight channel to channel isolated outputs at

The HMC6545 is a low power, high performance, fullyprogrammable, dual-channel, asynchronous advanced linear equalizer that operates at data rates of up to 32 Gbps. The HMC6545 is protocol and data rate agnostic, and it can operateon the transmit path to predistort a transmitted signal to invert channel distortion or on the receiver path to equalize the distorted and attenuated received signal. The HMC6545 iseffective in dealing with chromatic and polarization modedispersion and intersymbol interference (ISI) caused by a widevariety of transmission media (backplane or fiber) and channel lengths.The HMC6545 consists of an automatic gain control (AGC);dc offset correction circuitry; a 9-tap, 18 ps spaced feedforward equalizer (FFE); a summing node; and a linear programmableoutput driver. The input AGC linearly attenuates or amplifiesthe distorted input signal to generate a constant voltage at theinput of the FFE. The 9-tap FFE is programmed via 2-wire interface to generate wide range frequency responses that are precursor or postcursor in nature for compensating signal impairments. After FFE tap coefficients are summed at thesumming node, the signal is received by a linear output driver.DC offset correction circuitry is controlled either automatically or manually via Forward Error Correction (FEC).All high speed differential inputs and outputs of the HMC6545 arecurrent mode logic (CML) and terminated on chip with 50 ? tothe positive supply, 3.3 V, and can be dc-coupled or ac-coupled. The inputs and outputs of the HMC6545 can be operated eitherdifferentially or single-ended. The low power, high performance, and feature rich HMC6545 is packaged in a 5 mm ? 5 mm,32-lead LFCSP package. The device uses a single 3.3 V supply,eliminating external regulators. The HMC6545 operates over a?40?C to +95?C temperature range.Applications 40 Gbps/100 Gbps DQPSK direct detection receivers Short and long reach CFP2 and QSFP+ modules CEI-28G MR and CEI-25G LR 100 GE line cards 16 Gbps and 32 Gbps Fibre Channel Infiniband 14 Gbps FDR and 28 Gbps EDR rates Signal conditioning for backplane and line cards Broadband test and measurement equipment

The HMC703 fractional synthesizer is built upon the high performance PLL platform also contained in the HMC704 and Hittite?s latest generation of PLL+VCO products. This platform has the best phase-noise and spurious performance in the industry - enabling higher order modulation schemes while minimizing blocker effects in high performance radios.In addition, the HMC703 offers frequency sweep and modulation features, external triggering, double-buffering, exact frequency control, phase modulation and more - while maintaining pin compatibility for the main functions with the HMC700.Applications Microwave Point-to-Point Radios? Base Stations for Mobile Radio (GSM, PCS, DCS, CDMA, WCDMA) Wireless LANs, WiMAX Communications Test Equipment ATV Equipment Automotive Sensors AESA - Phased Arrays FMCW Radar Systems

The HMC830LP6GE is a low noise, wideband, Fractional-N Phase-Locked-Loop (PLL) that features an integrated Voltage Controlled Oscillator (VCO) with a fundamental frequency of 1500 MHz - 3000 MHz, and an integrated VCO Output Divider (divide by 1/2/4/6.../60/62), that together allow the HMC830LP6GE to generate frequencies from 25 MHz to 3000 MHz. The integrated Phase Detector (PD) and delta-sigma modulator, capable of operating at up to 100 MHz, permit wider loop-bandwidths with excellent spectral performance.The HMC830LP6GE features industry leading phase noise and spurious performance, across all frequencies, that enable it to minimize blocker effects, and improve receiver sensitivity and transmitter spectral purity. Its superior performance makes it the ideal device for multi channel multi standard wide band transceivers. HMC830LP6GE can be used as an LO for RF mixers, a clock source for high-frequency data-converters, or a tunable reference source for ultra-low spurious applications.Additional features of the HMC830LP6GE include RF output power control from 0 to 9 dB (3 dB steps), output Mute function, and a delta-sigma modulator Exact Frequency Mode which enables users to generate output frequencies with 0 Hz frequency error.For theory of operation and register map refer to the 'PLLs with Integrated VCOs - RF VCOs Operating Guide' Operating Guide.Applications Cellular/4G Infrastructure Repeaters and Femtocells Communications Test Equipment CATV Equipment Phased Array Applications Very High Data Rate Radios Tunable Reference Source for Spurious- Free Performance

HMC983LP5E is a fractional frequency divider targeted for fractional-N frequency synthesis, and stand-alone low noise frequency divider applications that require exceptional spurious performance.Although the HMC983LP5E can work with any VCO and/or compatible Phase Detector, best performance and features will be achieved when paired with the companion part, the HMC984LP4E.Fabricated in SiGe BiCMOS process, the HMC983LP5E features a 48-bit Delta Sigma Fractional Modulator (DSM) with programmable phase accumulator size, enabling precise control of frequency step size and resolution. Integrated DSM can generate frequencies with nearly 0 Hz frequency error. The DSM also includes a built-in programmable frequency sweep capability, with various automatic and user defined sweep modes and triggering options, including hardware trigger pin, or SPI trigger with optional delayed trigger.HMC983LP5E is a versatile part capable of various configurations. It has 5 general purpose I/Os (GPIOs). DSM outputs are made available from the GPIO port, enabling the HMC983LP5E to import and/or export DSM sequences for various configuration options.HMC983LP5E divider outputs are differential, open collector with programmable current to accommodate different off-chip loads.Applications Test Equipment Portable Instruments High Performance Fractional-N Frequency Synthesizers with Ultra Low Spurious Stand-Alone Divider and/or Delta-Sigma Modulator

The HMC988LP3E is a an ultra low noise clock divider capable of dividing by 1/2/4/8/16/32. It is a versatile device with additional functionality including adjustable output phase, adjustable delay in 60 steps of ~ 20 ps, a clock synchronization function, and a clock invert option.Housed in a compact 3 ? 3 mm SMT QFN package, the clock divider offers a high level of functionality. The device works with 3.3V supply or may be connected to 5V supply and utilize the optional on-chip regulator. This on-chip regulator may be bypassed.Up to 8 addressable HMC988LP3E devices can be used together on the SPI bus.The HMC988LP3E is ideally suited for data converter applications with extremely low phase noise requirements.APPLICATIONS Basestation Digital Pre-Distortion?Paths (DPD) High Performance Automated Test Equipment (ATE) Backplane Clock Skew Management? Phase Coherence of Multiple Clock Paths Clock Delay Management ton Improve Setup & Hold Time Margins PCB Signal Flight Time Offset Circuits Track and Hold Circuits for ADC/DACs

The HMC1018ALP4E is a broadband 5-bit GaAs IC digital attenuator in a low cost leadless surface mount package. Covering 0.1 to 30.0 GHz, the insertion loss is less than 5.5 dB typical. The attenuator bit values are 1.0 (LS B), 2, 4, 8, 16 for a total attenuation of 31 dB. Attenuation accuracy is excellent at ?0.4 dB typical step error with an IIP3 of +43 dBm. The control interface is CMOS/TTL compatible and accepts a three wire serial input. The HMC1018ALP4E features a user selectable power up state and a serial output port for cascading other Analog Devices serial controlled components.APPLICATIONS Fiber Optics & Broadband Telecom Microwave Radio & VSAT Military Radios, Radar & ECM Space Applications Sensors Test & Measurement Equipment

The HMC1094LP3E Logarithmic Detector converts RF signals at its input, to a proportional DC voltage at its output. The HMC1094LP3E employs successive compression topology which delivers high dynamic range over a wide input frequency range. As the input power is increased, successive amplifiers move into saturation one by one creating an approximation of the logarithm function. The output of a series of detectors is summed, converted into the voltage domain and buffered to drive the LOGOUT output. The HMC1094LP3E provides a nominal logarithmic slope of +18 mV/dB and an intercept of -113 dBm at 23 GHz. Ideal as a log detector for high volume microwave radio and VSAT applications, the HMC1094LP3E is housed in a compact 3x3 mm RoHS compliant SMT plastic package.Applications Point-to-Point Microwave Radio VSAT Wideband Power Monitoring Receiver Signal Strength Indication (RSSI) Test & Measurement

The HMC1132PM5E is a four-stage, gallium arsenide (GaAs) pseudomorphic high electron mobility transistor (pHEMT), monolithic microwave integrated circuit (MMIC) power amplifier. The device operates from 27 GHz to 32 GHz, providing 24 dB of gain and 29.5 dBm of saturated output power from a 5 V power supply.The HMC1132PM5E exhibits excellent linearity with high output third-order intercept (IP3) of 37 dBm, and it is optimized for high capacity, point to point and point to multipoint radio systems. The amplifier configuration and high gain make the HMC1132PM5E an ideal candidate for last stage signal amplification before the antenna.The HMC1132PM5E amplifier input/outputs (I/Os) are internally matched to 50 ?. The device is housed in a RoHS compliant, premolded cavity, 5 mm ? 5 mm LFCSP package, making the device compatible with high volume surface-mount technology (SMT) assembly equipment.APPLICATIONS Point-to-point radios Point-to-multipoint radios Very small aperture terminals (VSATs) and satellite communication (SATCOM) Military and space

The HMC245AQS16E is a low cost non-reflective?SP3T switches in 16-lead QSOP surface mount packages.?Covering DC to 3.5 GHz, the switch offers 30 to?40 dB isolation and a low insertion loss of 0.7 dB. A?2:3 TTL/CMOS compatible decoder is integrated on?the switch requiring only 2 control lines and a single?+5V bias to select each path, replacing 6 control lines?normally required by GaAs SP3T switches.Applications Basestation Infrastructure? CATV / DBS? Wireless Local Loop? Test Equipment

The HMC253ALC4 is a non-reflective SP8T switch in a leadless RoHS compliant 4x4 mm ceramic SMT package featuring wideband operation from DC to 3.5 GHz. The switch offers a single positive bias and true TTL/CMOS compatibility enabling it to operate with 0/+3V control and a +5V supply. A 3:8 decoder is integrated on the switch requiring only 3 control lines and a positive bias to select each path. The HMC253ALC4 SP8T will replace multiple configurations of SP4T and SPDT MMIC switches.Applications Basestations & Repeaters WiMAX/WiBro, and Fixed Wireless Cellular/3G infrastructure CATV/DBS Military & Hi-Rel

The HMC253AQS24 & HMC253AQS24E are lowcost non-reflective SP8T switches in 24-lead QSOP packages featuring wideband operation from DC to 2.5 GHz. The switch offers a single positive bias and true TTL/CMOS compatibility. A 3:8 decoder is integrated on the switch requiring only 3 control lines and a positive bias to select each path. The HMC253AQS24 & HMC253AQS24E SP8T will replace multiple configurations of SP4T and SPDT MMIC switches.Applications CATV/DBS CDMA Cellular/PCS

The HMC346ALC3B is an absorptive Voltage Variable Attenuator (VVA) in a leadless ?Pb free? RoHS compliant SMT mount ceramic package operating from DC - 18 GHz. It features an on-chip reference attenuator for use with an external op-amp to provide simple single voltage attenuation control, 0 to -5V. The device is ideal in designs where an analog DC control signal must control RF signal levels over a 30 dB amplitude range. The HMC346ALC3B allows the use of surface mount manufacturing techniques.Applications Test Instrumentation Fiber Optics & Broadband Telecom Microwave Radio & VSAT Military Radios, Radar, & ECM

The HMC346AMS8GE is absorptive Voltage Variable Attenuators (VVA) in 8 lead surface-mount packages operating from DC - 8 GHz. It features an on-chip reference attenuator for use with an external op-amp to provide simple single voltage attenuation control, 0 to -5V. The device is ideal in designs where an analog DC control signal must control RF signal levels over a 30 dB amplitude range. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave point-to-point and VSAT radios.Applications Point-to-Point Radio VSAT Radio

The HMC424AG16 is a broadband 6-bit GaAs IC digital attenuator in a 16 lead glass/metal (hermetic) surface mount package. Covering DC to 3 GHz, the insertion loss is less than 3 dB typical. The attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of 31.5 dB. Attenuation accuracy is excellent at ?0.5 dB typical step error with an IIP3 of +34 dBm. Six control voltage inputs, toggled between 0 and -5V, are used to select each attenuation state at less than 70 ?A each. A single Vee bias of -5V allows operation at frequencies down to DC.Applications Telecom Infrastructure Military Radios, Radar & ECM Space Applications Test Instrumentation

The HMC641ALP4E is a general-purpose, nonreflective, single-pole, four-throw (SP4T) switch manufactured using a gallium arsenide (GaAs) process. This switch offers high isolation, low insertion loss, and on-chip termination of the isolated ports.The switch operates with a negative supply voltage range of ?5 V to ?3 V and requires two negative logic control voltages.The HMC641ALP4E includes an on-chip, binary 2 to 4 line decoder that provides logic control from two logic input lines.The HMC641ALP4E comes in a 4 mm ? 4 mm, 24-lead LFCSP package and operates from 0.1 GHz to 20 GHz.Applications Test instrumentation Microwave radios and very small aperture terminals (VSATs) Military radios, radars, and electronic counter measures (ECMs) Broadband telecommunications systems?