DC753A: Demo Board for the LT5526 High Linearity, Low Power Downconverting Mixer.

The LTC3443 is a high efficiency, fixed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The part is pin for pin compatible with its predecessor, the LTC3441, with a lower operating frequency (600kHz), and a VC pin clamp circuit during Burst Mode operation. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single Lithium Ion or multi-cell applications where the output voltage is within the battery voltage range.The device includes two 0.10? N-channel MOSFET switches and two 0.11? P-channel switches. External Schottky diodes are optional, and can be used for a moderate efficiency improvement. The operating frequency is internally set to 600kHz and can be synchronized up to 1.2MHz. Quiescent current is only 28?A in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/ SYNC pin is driven low or with a clock, then fixed frequency switching is enabled.Other features include a 1?A shutdown, soft-start control, thermal shutdown and current limit. The LTC3443 is available in a thermally enhanced 12-lead (4mm ? 3mm) DFN Package.Applications Handheld Computers Handheld Instruments MP3 Players Digital Cameras

The LT3479 is a current mode, fixed frequency step-up DC/DC converter with an internal 3A, 42V switch. Efficiencies of up to 89% can be achieved in typical applications. It features a programmable soft-start function to limit inductor current during start-up and inrush current protection to protect the LT3479 during shorts and line transients. Both inputs of the error amplifier are available to the user allowing positive and negative output voltages. Through an external resistor, the user can program the switching frequency from 200kHz to 3.5MHz. The low profile (0.75mm) 14-pin, 4mm ? 3mm DFN package provides excellent thermal performance in a small footprint. The LT3479 is also available in a thermally enhanced 16-pin TSSOP package.Applications High Power LED Driver DSL Modems Distributed Power

The LTC3808 is a synchronous step-down switching regulator controller that drives external complementary power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDS sensing eliminates the need for a current sense resistor and improves efficiency.Burst Mode operation provides high efficiency operation at light loads. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems.The switching frequency can be programmed up to 750kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC3808 can be externally synchronized from 250kHz to 750kHz. Burst Mode is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and RF interference. To further reduce EMI, the LTC3808 incorporates a novel spread spectrum frequency modulation technique.The LTC3808 is available in the tiny footprint thermally enhanced DFN package or 16-lead SSOP package.Protected by U.S. Patents including 5481178, 5929620, 6580258, 6304066, 5847554, 6611131, 6498466. Other Patents pending. Features Package LTC3809 PLL, Selectable Spread Spectrum, Power Good 3x3 DFN-10, MS-10E LTC3809-1 Tracking 3x3 DFN-10, MS-10E LTC3808 PLL, Selectable Spread Spectrum, Tracking Power Good 4x3 DFN-14, SSOP-16 Applications One or Two Cell Lithium-Ion Powered Devices Notebook and Palmtop Computers, PDAs Portable Instruments Distributed DC Power Systems

The HMC747 is a D-Type Flip-Flop designed to support data transmission rates of up to 13 Gbps, and clock frequencies as high as 13 GHz. During normal operation, data is transferred to the outputs on the positive edge of the clock. Reversing the clock inputs allows for negative-edge triggered applications. The HMC747 also features an output level control pin, VR, which allows for loss compensation or for signal level optimization.All input and output signals to the HMC747 are terminated with 50 ? to VCC on-chip, and may be either AC or DC coupled. Inputs and outputs can be connected directly to a 50 ??to VCC terminated system, while DC blocking capacitors may be used if the terminating system is 50 ??to ground. The HMC747 operates from a single +3.3V DC supply and is available in a ceramic RoHS compliant 3?3 mm SMT package.APPLICATIONS RF ATE Applications Broadband Test & Measurement Serial Data Transmission up to 13 Gbps Digital Logic Systems up to 13 GHz

The HMC954LC4B is a 2 to 1 Multiplexer designed for 32 Gbps data serialization. The mux latches the two differential inputs on a rising edge of the input clock. The device uses both rising and falling edges of the half-rate clock to serialize the data. The HMC954LC4B also features an output level control pin, VR, which allows for loss compensation or for signal-level optimization.All differential inputs to the HMC954LC4B are CML and terminated on-chip with 50 ??to the positive supply, GND, and may be AC or DC coupled. The differential CML outputs are source terminated to 50 ? and may also be AC or DC coupled. Outputs can be connected directly to a 50 ??ground-terminated system or drive devices with CML logic input. The HMC954LC4B operates from a single ?3.3 V supply and is available in a ceramic ROHS-compliant 4 ? 4 mm SMT package.APPLICATIONS SONET OC-192 Broadband Test &?Measurement Equipment FPGA Interfacing Circuitry 16 G and 32 G Fiber Channel 100 Gbit Ethernet

The HMC987LP5E 1-to-9 fanout buffer is designed for low noise clock distribution. It is intended to generate relatively square wave outputs with rise/fall times < 100 ps. The low skew and jitter outputs of the HMC987LP5E, combined with its fast rise/fall times, leads to controllable low-noise switching of downstream circuits such as mixers, ADCs/DACs or SERDES devices. The noise floor is particularly important in these applications, when the clocknetwork bandwidth is wide enough to allow squarewave switching. Driven at 2 GHz, outputs of the HMC987LP5E have a noise floor of ?166 dBc/Hz, corresponding to a jitter density of 0.6 asec/rtHz - or 50 fs over an 8 GHz bandwidth.The input stage can be driven single-ended or differentially, in a variety of signal formats (CML, LVDS, LVPECL or CMOS), AC or DC coupled. The input stage also features adjustable input impedance. It has 8 LVPECL outputs, and 1 CML output with adjustable swing/power-level in 3 dB steps.Individual output stages may be enabled or disabled for power-savings when not required using either hardware control pins, or under control of a serial-port interface.APPLICATIONS SONET, Fibre Channel,?GigE Clock Distribution ADC/DAC Clock Distribution Low Skew and Jitter Clock?or Data Fanout Wireless/Wired Communications Level Translation High Performance Instrumentation Medical Imaging Single-Ended to Differential?Conversion

The ADG5404 is a complementary metal-oxide semiconductor(CMOS) analog multiplexer, comprising four single channels.The on-resistance profile is very flat over the full analog input range, ensuring excellent linearity and low distortion when switching audio signals.The ADG5404 is designed on a trench process, which guardsagainst latch-up. A dielectric trench separates the P and Nchannel transistors, thereby preventing latch-up even undersevere overvoltage conditions.The ADG5404 switches one of four inputs to a common output,D, as determined by the 3-bit binary address lines, A0, A1, andEN. Logic 0 on the EN pin disables the device. Each switchconducts equally well in both directions when on and has aninput signal range that extends to the supplies. In the off condition, signal levels up to the supplies are blocked. All switchesexhibit break-before-make switching action.Product Highlights Trench Isolation Guards Against Latch-Up. A dielectric trench separates the P and N channel transistors, thereby preventing latch-up even under severe overvoltage conditions. Low RON. Dual-Supply Operation. For applications where the analog signal is bipolar, the ADG5404 can be operated from dual supplies of up to ?22 V. Single-Supply Operation. For applications where the analog signal is unipolar, the ADG5404 can be operated from a single-rail power supply of up to 40 V. 3 V logic-compatible digital inputs: VINH = 2.0 V, VINL = 0.8 V. No VL logic power supply required.Applications Relay replacement Automatic test equipment Data acquisition Instrumentation Avionics Audio and video switching Communication systems

The ADG5419 is a monolithic industrial CMOS analog switch containing a latch-up immune single-pole/double-throw (SPDT) switch. An EN input on the LFCSP package is used to enable or disable the device. When disabled, all channels are switched off.Each switch conducts equally well in both directions when on, and each switch has an input signal range that extends to the power supplies. In the off condition, signal levels up to the supplies are blocked. The ADG5419 exhibits break-before-make switching action for use in multiplexer applications.The ultralow on resistance and on-resistance flatness of these switches make them ideal solutions for data acquisition and gain switching applications, where low distortion is critical. The latch-up immune construction, and high ESD rating, makes these switches more robust in harsh environments.PRODUCT HIGHLIGHTS Trench isolation guards against latch-up. A dielectric trench separates the P and N channel transistors thereby preventing latch-up even under severe overvoltage conditions. Low RON. Dual-supply operation. For applications where the analog signal is bipolar, the ADG5419 can be operated from dual supplies up to ?22 V. Single-supply operation. For applications where the analog signal is unipolar, the ADG5419 can be operated from a single-rail power supply up to 40 V. 3 V logic compatible digital inputs: VINH = 2.0 V, VINL = 0.8 V. No VL logic power supply required.APPLICATIONS High voltage signal routing Automatic test equipment Analog front-end circuits Precision data acquisition Industrial Instrumentation Amplifier gain select Relay replacement

The AD1937 is a high performance, single-chip codec that provides four analog-to-digital converters (ADCs) with differential input and eight digital-to-analog converters (DACs) with differential output, using the Analog Devices, Inc., patented multibit sigma-delta (?-?) architecture. An I2C? port is included, allowing a microcontroller to adjust volume and many other parameters. The AD1937 operates from 3.3 V digital and analog supplies. The AD1937 is available in a 64-lead (differential output) LQFP.The AD1937 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive the master clock from the LR (frame) clock or from an external crystal, the AD1937 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The DACs and ADCs are designed using the latest Analog Devices continuous time architecture to further minimize EMI. By using 3.3 V supplies, power consumption is minimized and further reduces emissions.ApplicationsAutomotive audio systems Home theater systemsSet-top boxesDigital audio effects processorsData Sheet, Rev. 0, 9/08