The ADP2138 and ADP2139 are high efficiency, low quiescent current, synchronous step-down dc-to-dc converters. The ADP2139 has the additional feature of an internal discharge switch. The total solution requires only three tiny external components. When the MODE pin is set high, the buck regulator operates in forced PWM mode, which provides low peak-to-peak ripple for power supply noise sensitive loads at the expense of light load efficiency. When the MODE pin is set low, the buck regulator automatically switches operating modes, depending on the load current level. At higher output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving light load efficiency.The ADP2138/ADP2139 operate on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 800 mA is achievable across the input voltage range.The ADP2138/ADP2139 are available in fixed output voltages of 3.3 V, 3.0 V, 2.8 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, 1.0 V, and 0.8 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2138/ADP2139 have internal soft start and they are internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2138/ADP2139 draw 0.2 ?A (typical) from the input source.Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup. The ADP2138/ADP2139 are available in a 6-ball wafer level chip scale package (WLCSP).Applications PDAs and palmtop computers Wireless handsets Digital audio, portable media players Digital cameras, GPS navigation units

The ADP2140 includes a high efficiency, low quiescent 600 mAstepdown dc-to-dc converter and a 300 mA LDO packaged in asmall 10-lead 3 mm ? 3 mm LFCSP. The total solution requiresonly four tiny external components.The buck regulator uses a proprietary high speed current-mode,constant frequency, pulse-width modulation (PWM) controlscheme for excellent stability and transient response. To ensurethe longest battery life in portable applications, the ADP2140 hasa power saving variable frequency mode to reduce switching frequencyunder light loads.The LDO is a low quiescent current, low dropout linear regulatordesigned to operate in a split supply mode with VIN2 as low as1.65 V. The low input voltage minimum allows the LDO to bepowered from the output of the buck regulator increasing efficiencyand reducing power dissipation. The ADP2140 runs frominput voltages of 2.3 V to 5.5 V allowing single Li+/Li? polymer cell, multiple alkaline/NiMH cell, PCMCIA, and other standardpower sources.ADP2140 includes a power-good pin, soft start, and internal?compensation. Numerous power sequencing options are user-selectable through two enable inputs. In autosequencing mode, the highest voltage output enables on the rising edge of EN1.?During logic controlled shutdown, the input disconnects from the output and draws less than 300 nA from the input source.?Other key features include: undervoltage lockout to prevent deep?battery discharge, soft start to prevent input current overshoot?at startup, and both short-circuit protection and thermal overload protection circuits to prevent damage in adverse conditions.When the ADP2140 is used with two 0603 capacitors, one 0402capacitor, one 0402 resistor, and one 0805 chip inductor, the totalsolution size is approximately 90 mm2 resulting in the smallest footprintsolution to meet a variety of portable applications.Applications Mobile phones Personal media players Digital camera and audio devices Portable and battery-powered equipment

The AD7792/AD7793?are low power, low noise, complete analog front ends for high precision measurement applications. The AD7792/AD7793 contain a low noise 16-/24-bit ?-? ADC with three differential analog inputs. The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 40 nV when the update rate equals 4.17 Hz.The devices contain a precision low noise, low drift internal band gap reference and can accept an external differential reference. Other on-chip features include programmable excitation current sources, burnout currents, and a bias voltage generator. The bias voltage generator sets the common-mode voltage of a channel to AVDD/2.The devices can be operated with either the internal clock or an external clock. The output data rate from the parts is software-programmable and can be varied from 4.17 Hz to 470 Hz.The parts operate with a power supply from 2.7 V to 5.25 V. They consume a current of 400 ?A typical and are housed in a 16-lead TSSOP package.Applications Thermocouple measurements RTD measurements Thermistor measurements Gas analysis Industrial process control Instrumentation Portable instrumentation Blood analysis Smart transmitters Liquid/gas chromatography 6-digit DVM

The HMC561LP3(E) is a x2 active broadband frequency multiplier utilizing GaAs PHEMT technology in a leadless RoHS compliant SMT package. When driven by a +5 dBm signal, the multiplier provides +14 dBm typical output power from 8 to 21 GHz and the Fo and 3Fo isolations are 15 dBc at 16 GHz. The HMC561LP3(E) is ideal for use in LO multiplier chains for Pt to Pt & VSAT Radios yielding reduced parts count vs. traditional approaches.The low additive SSB Phase Noise of -139 dBc/Hz at 100 kHz offset helps maintain good system noise performance. The RoHS packaged HMC561LP3(E) eliminates the need for wire bonding, and allows the use of surface mount manufacturing techniques.APPLICATIONS Clock Generation Applications:? SONET OC-192 & SDH STM-64? Point-to-Point & VSAT Radios? Test Instrumentation? Military & Space

The HMC678LC3C is a 2:1 Selector designed to support data transmission rates of up to 13 Gbps, and selector port operation of up to 13 GHz. The selector routes one of the two single-ended inputs to the differential output upon assertion of the proper select port. All single-ended input signals to the HMC678LC3C are terminated with 50 ohms to ground on-chip, and may be either AC or DC coupled.The outputs of the HMC678LC3C may be operated either differentially or single-ended. Outputs can be connected directly to a 50 ohm terminated system, while DC blocking capacitors may be used if the terminating system is 50 ohms to a non-ground DC voltage. The HMC678LC3C operates from a single -3.3V dc supply and is available in a ceramic RoHS compliant 3x3 mm SMT package.APPLICATIONS 2:1 Multiplexer up to 13 Gbps RF ATE Applications Broadband Test & Measurement Serial Data Transmission up to 13 Gbps Redundant Path Switching Built-in Test

The HMC727 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. All input signals to the HMC727 are terminated with 50 Ohms to ground on-chip, and maybe either AC or DC coupled.The differential outputs of the HMC727 may be either AC or DC coupled. Outputs can be connected directly to a 50 Ohm to ground terminated system, while DC blocking capacitors may be used if the terminating system is 50 Ohms to a nonground DC voltage. The HMC727 operates from a single -3.3V DC supply and is available in a ceramic RoHS compliant 3x3 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 HMC737 is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO. The HMC737 integrate a resonator, negative resistance device, varactor diode and feature half frequency output. The VCO's phase noise performance is excellent over temperature, shock, and process due to the oscillator's monolithic structure. Power output is +9 dBm typical from a +4.2V supply voltage. The voltage controlled oscillator is packaged in a leadless QFN 4x4 mm surface mount package, and requires no external matching components.APPLICATIONS Point-to-Multi-Point Radios Test Equipment & Industrial Controls SATCOM Military End-Use

The HMC740 is an InGaP Heterojunction Bipolar Transistor (HBT) Gain Block MMIC SMT amplifier covering 0.05 to 3 GHz. Packaged in an industry standard SOT89, the amplifier can be used as a cascadable 50 Ohm RF or IF gain stage as well as a PA or LO driver with up to +18 dBm output power. The HMC740 offers 15 dB of gain with a +40 dBm output IP3 at 100 MHz, and can operate directly from a +5V supply. The HMC740 exhibits excellent gain and output power stability over temperature, while requiring a minimal number of external bias components.Applications Cellular/3G & WiMAX/4G Fixed Wireless & WLAN CATV, Cable Modem & DBS Microwave Radio & Test Equipment IF & RF Applications

The HMC686LP4(E) is a high dynamic range passive MMIC mixer with integrated LO amplifier in a 4x4 SMT QFN package covering 0.7 to 1.1 GHz. Excellent input IP3 performance of +34 dBm for down conversion is provided for 3G & 4G GSM/CDMA applications at an LO drive of 0 dBm. With an input 1 dB compression of +25 dBm, the RF port will accept a wide range of input signal levels. Conversion loss is 7.5 dB typical. The DC to 500 MHz IF frequency response will satisfy GSM/CDMA transmit or receive frequency plans.The HMC686LP4(E) is optimized to high side LO frequency plans for 0.7 - 1.1 GHz RF Band and is pin for pin compatible with the?HMC684LP4(E)?which is a 0.7 - 1.0 GHz converter optimized for low side LO. The HMC686LP4(E) is optimized to low side LO frequency plans for 1.4 - 1.5 GHz RF LTE band applications.APPLICATIONS Cellular/3G & LTE/WiMAX/4G Basestations & Repeaters GSM, CDMA & OFDM Transmitters and Receivers

The HMC822LP6CE is a fully functioned Fractional-N Phase-Locked-Loop (PLL) Frequency Synthesizer with an Integrated Voltage Controlled Oscillator (VCO). The synthesizer consists of an integrated low noise VCO with a triband output, an autocalibration subsystem for low voltage VCO tuning, a very low noise digital Phase Detector (PD), a precision controlled charge pump, a low noise reference path divider and a fractional divider.The fractional synthesizer features an advanced delta-sigma modulator design that allows both ultra-fine step sizes and low spurious products. The phase detector (PD) features cycle slip prevention (CSP) technology to allow faster frequency hopping times. Ultra low in-close phase noise and low spurious also allows wider loop bandwidths for faster frequency hopping and low micro-phonics.For theory of operation and register map refer to the 'PLLs with Integrated VCO - RF VCOs' Operating Guide.Applications Cellular/4G Infrastructure Repeaters and Femtocells Communications Test Equipment CATV Equipment Phased Array Applications DDS Replacement? Very High Data Rate Radios