DC285A: Demo Board for the LTC1695 SMBus/I2C Fan Speed Controller in SOT-23.

The LTC3309B is a very small, high efficiency, low noise, monolithic synchronous 6A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control at switching frequencies 3MHz-10MHz and minimum on-time as low as 22ns, this regulator achieves fast transient response with small external components. Silent Switcher architecture minimizes EMI emissions. The LTC3309B operates in forced continuous or pulse skip mode for low noise, or the low-ripple Burst Mode operation for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. Other features include output over-voltage protection, short-circuit protection, thermal shut-down, clock synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a low profile 12-lead 2mm ? 2mm נ0.74mm LQFN package with exposed pad for low thermal resistance.APPLICATIONSOptical Networking, Servers, Telecom Automotive, Industrial, CommunicationsDistributed DC Power Systems (POL) FPGA, ASIC, ?P Core Supplies

The LTC5597 is a high accuracy RMS power detector that provides a very wide RF input bandwidth, from 100MHz up to 70GHz. This makes the device suitable for a wide range of RF and microwave applications, such as point-to-point microwave links, instrumentation and power control applications. The DC output voltage of the detector is an accurate representation of the average signal power applied to the RF input. The response is linear-in-dB with 28.5mV/dB logarithmic slope over a 35dB dynamic range with typically better than ?1dB accuracy. The detector is particularly suited for measurement of waveforms with crest factor (CF) as high as 12dB, and waveforms that exhibit a significant variation of the crest factor during measurement. To achieve higher accuracy and lower output ripple, the averaging bandwidth can be externally adjusted by a capacitor connected between the FLTR and OUT pins. The enable interface switches the device between active measurement mode and a low power shutdown mode.Applications Point-to-Point Microwave Links SATCOM Instrumentation and Measurement Equipment Military Radios 5G, LTE, WiFi, Wireless Networks RMS Power Measurement Receive and Transmit Gain Control RF PA Transmit Power Control

The HMC908A is a compact, gallium arsenide (GaAs), monolithic microwave integrated circuit (MMIC), inphase/quadrature (I/Q) downconverter in a leadless, RoHS compliant ceramic leadless chip carrier. This device provides a small signal conversion gain of 11 dB with a noise figure of 2 dB and 25 dB of image rejection at 100 MHz. The HMC908A utilizes a low noise amplifier (LNA) followed by an image rejection mixer that is driven by a local oscillator (LO) buffer amplifier. The image rejection mixer eliminates the need for a filter following the LNA, and removes thermal noise at the image frequency. I and Q mixer outputs are provided and an external 90? hybrid is needed to select the required sideband. The HMC908A is a much smaller alternative to hybrid style image rejection mixer downconverter assemblies, and it eliminates the need for wire bonding by allowing the use of surface-mount manufacturing techniques.Applications Point to point radios Point to multipoint radios and very small aperture terminals (VSATs) Test equipment and sensors Military end use

The HMC973ALP3E is an absorptive Voltage VariableAttenuator (VVA) which operates from 0.5 to 5 GHzand is ideal in designs where an analog DC controlsignal must be used to control RF signal levels overa 26 dB amplitude range. It features a shunt-typeattenuator controlled by an analog voltage, Vctrl.The HMC973ALP3E is an unidirectional device withoptimum linearity performance achieved when the RFinput signal is applied to the RFIN package lead. TheHMC973ALP3E is housed in a RoHS compliant 3x3mm QFN leadless package.Applications Point-to-point radio Cellular/3G & WiMAX/4G infrastructure Test instrumentation Microwave sensors? Military, ECM & radar

The ADF4196 frequency synthesizer can be used to implement local oscillators (LO) in the upconversion and downconversion sections of wireless receivers and transmitters. Its architecture isspecifically designed to meet the GSM/EDGE lock time requirements for base stations, and the fast settling feature makes theADF4196 suitable for pulse Doppler radar applications.The ADF4196 consists of a low noise, digital phase frequency detector (PFD) and a precision differential charge pump. A differential amplifier converts the differential charge pump output to a single-ended voltage for the external voltage controlled oscillator (VCO). The sigma-delta (?-?) based fractional interpolator, working with the N divider, allows programmable modulus fractional-N division. Additionally, the 4-bit reference (R) counter and on-chip frequency doubler allow selectable reference signal (REFIN) frequencies at the PFD input.A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and a VCO. The switching architecture ensures that the PLL settles within the GSM time slot guard period, removing the need for a second PLL and associated isolation switches. This decreases the cost, complexity, PCB area, shielding, and characterization found on previous ping-pong GSM PLL architectures.Applications GSM/EDGE base stations PHS base stations Pulsed Doppler radar Instrumentation and test equipment Beam-forming/phased array systems

The HMC1060LP3E is a BiCMOS ultra low noise quad-output linear voltage regulator targeted at high performance applications requiring superb power supply isolation.Maximum 500 mA of current, distributed between four independent outputs, enable the HMC1060LP3E to supply all of the power needs of Hittite's Wideband PLL with Integrated VCO products, such as the HMC830LP6GE.Although targeted at Hittite's Wideband PLLs with Integrated VCO products, the HMC1060LP3E makes an excellent general purpose regulator that supports adjustable output voltages ranging anywhere from 1.8V to 5.2V.An Integrated PTAT (Proportional To Absolute Temperature) feature enabled via an external pin, allows the HMC1060LP3E to scale the supply voltage with temperature in order to maximize phase noise and output power performance of Hittite's Wideband with Integrated VCO products, as well as other devices powered by the HMC1060LP3E.Integrated thermal protection disables the outputs of the HMC1060LP3E at extreme temperatures, until the device cools down, making the HMC1060LP3E a robust device capable of dealing with temporary and unforeseen scenarios including momentary short circuits and extreme temperatures.External Enable input provides a convenient way to power on or off all of the devices supplied by the HMC1060LP3E.The HMC1060LP3E is housed in a 3 ? 3 mm QFN SMT package.APPLICATIONS Ultra Low Noise Frequency Generation?(PLLs, VCOs, PLLs?with Integrated VCOs) RF & Mixed-Signal Supply

The AD5228 is Analog Devices? latest 32-step-up/step-down control digital potentiometer emulating mechanical potentiometer operation. Its simple up/down control interface allows manual control with just two external pushbutton tactile switches. The AD5228 is designed with a built-in adaptive debouncer that ignores invalid bounces due to contact bounce commonly found in mechanical switches. The debouncer is adaptive, accommodating a variety of pushbutton tactile switches that generally have less than 10 ms of bounce time during contact closures. When choosing the switch, the user should consult the timing specification of the switch to ensure its suitability in an AD5228 application.The AD5228 can increment or decrement the resistance in discrete steps or in autoscan mode. When the PU or PD button is pressed briefly (no longer than 0.6 s), the resistance of the AD5228 changes by one step. When the PU or PD button is held continuously for more than a second, the device activates the autoscan mode and changes four resistance steps per second.The AD5228 can also be controlled digitally; its up/down features simplify microcontroller usage. The AD5228 is available in a compact thin SOT-23-8 (TSOT-8) package. The part is guaranteed to operate over the automotive temperature range of ?40?C to +105?C.The AD5228?s simple interface, small footprint, and very low cost enable it to replace mechanical potentiometers and trimmers with typically 3? improved resolution, solid-state reliability, and faster adjustment, resulting in considerable cost saving in end users? systems.Users who consider EEMEM potentiometers should refer to the recommendations in the Applications section.APPLICATIONS Mechanical potentiometer and trimmer replacements LCD backlight, contrast, and brightness controls Digital volume control Portable device-level adjustments Electronic front panel-level controls Programmable power supply

The AD5790?is a single 20-bit, voltage out DAC that operates from a bipolar supply up to 33V. Reference buffers are also provided on-chip The AD5790 accepts a positive reference input in the range of 5V to VDD ? 2.5V and a negative reference input in the range of VSS + 2.5v to 0V. The AD5790 offers a relative accuracy of +/-2 LSB's max and operation is guaranteed monotonic with a -1 LSB to +3 LSB's DNL specification.The part uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and is compatible with standard SPI?, QSPI?, MICROWIRE?, and DSP interface standards. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0V and in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides a disable feature that places the output in a defined load state.PRODUCT HIGHLIGHTS 20-bit resolution Wide power supply range of up to ?16.5 V. ?40?C to +125?C operating temperature range. Low 8 nV/?Hz noise. Low ?0.018 ppm/?C gain error temperature coefficient.APPLICATIONS Medical instrumentation Test and measurement Industrial control Scientific and aerospace instrumentation Data acquisition systems Digital gain and offset adjustment Power supply control

The AD7770 is an 8-channel, simultaneous sampling ADC. Eightfull sigma-delta (?-?) ADCs are on chip. The AD7770 providesa low input current to allow direct sensor connection. Each inputchannel has a programmable gain stage allowing gains of 1, 2, 4,and 8 to map lower amplitude sensor outputs into the full-scaleADC input range, maximizing the dynamic range of the signalchain. The AD7770 accepts a VREF voltage from 1 V up to 3.6 V.The analog inputs accept unipolar (0 V to VREF) or true bipolar(?VREF/2) analog input signals with 3.3 V or ?1.65 V analogsupply voltages, respectively for PGAGAIN = 1. The analog inputscan be configured to accept true differential, pseudo differential,or single-ended signals to match different sensor outputconfigurations.Each channel contains a PGA, an ADC modulator and asinc3, low latency digital filter. An SRC is provided to allow fineresolution control over the AD7770 ODR. This control can beused in applications where the ODR resolution is required tomaintain coherency with 0.01 Hz changes in the line frequency.The SRC is programmable through the serial port interface (SPI).The AD7770 implements two different interfaces: a data outputinterface and SPI control interface. The ADC data output interfaceis dedicated to transmitting the ADC conversion results fromthe AD7770 to the processor. The SPI writes to and reads fromthe AD7770 configuration registers and for the control andreading of data from the SAR ADC. The SPI can also beconfigured to output the ?-? conversion data.The AD7770 includes a 12-bit SAR ADC. This ADC can beused for AD7770 diagnostics without having to decommissionone of the ?-? ADC channels dedicated to system measurementfunctions. With the use of an external multiplexer, which can becontrolled through the three general-purpose input/output pins(GPIOs), and signal conditioning, the SAR ADC can validatethe ?-? ADC measurements in applications where functionalsafety is required. In addition, the AD7770 SAR ADC includesan internal multiplexer to sense internal nodes.The AD7770 contains a 2.5 V reference and reference buffer. Thereference has a typical temperature coefficient of 10 ppm/?C.The AD7770 offers two modes of operation: high resolution modeand low power mode. High resolution mode provides a higherdynamic range while consuming 10.75 mW per channel; lowpower mode consumes just 3.37 mW per channel at a reduceddynamic range specification.The specified operating temperature range is ?40?C to +105?C,although the device is operational up to +125?C.Applications Protection relays General-purpose data acquisition Industrial process control