The HMC802ALP3E is a broadband bidirectional 1-bitGaAs IC digital attenuator in a low cost leadless sur-face mount package. This single positive control linedigital attenuator utilizes off chip AC ground capac-itors for near DC operation, making it suitable for awide variety of RF and IF applications. Covering DCto 10 GHz, the insertion loss is less than 3 dB typicaland attenuation accuracy is excellent at ±0.6 dB typ-ical. The attenuator also features a high IIP3 of +55dBm. One TTL/CMOS control input is used to selectthe attenuation state and a single Vdd bias of +5V isrequired. Applications Test equipment and sensors ISM, MMDS, WLAN, WiMAX, WiBro Microwave radio & VSAT Cellular infrastructure

The HMC8400 is a gallium arsenide (GaAs), pseudomorphic high electron mobility transistor (pHEMT), monolithic microwave integrated circuit (MMIC). The HMC8400 is a wideband low noise amplifier that operates between 2 GHz and 30 GHz. The amplifier provides 13.5 dB of gain, a 2 dB noise figure, 26.5 dBm output IP3, and 14.5 dBm of output power at 1 dB gain compres-sion, requiring 67 mA from a 5 V supply. The HMC8400 is self biased with only a single positive supply needed to achieve a drain current IDD of 67 mA. The HMC8400 also has a gain control option, VGG2. The HMC8400 amplifier input/outputs are internally matched to 50 Ω and dc blocked, facilitating integration into multichip modules (MCMs). All data is taken with the chip connected via two 0.025 mm (1 mil) wire bonds of minimal length 0.31 mm (12 mils).Applications Test instrumentation Microwave radios and very small aperture terminals (VSATs) Military and space Telecommunications infrastructure Fiber optics

The HMC862A is a low noise, programmable frequency divider in a 3 mm × 3 mm, leadless, surface-mount package. The frequency divider, N, can be programmed to divide from 1, 2, 4, or 8 in the 0.1 GHz to 24 GHz input frequency range.The low phase noise, wide frequency range, and flexible division ratio make this device ideal for high performance and wideband communication systems.Applications Satellite communication systems Point to point and point to multipoint radios Military applications Test equipment

The HMC939ALP4E is a 5-bit digital attenuator with a 31 dBattenuation control range in 1 dB steps.The HMC939ALP4E offers optimum insertion loss, attenuationaccuracy, and input linearity over the specified frequency rangefrom 100 MHz to 33 GHz.The HMC939ALP4E requires dual supply voltages, VDD = +5 Vand VSS = −5 V, and provides CMOS-/TTL-compatible parallelcontrol interface by incorporating an on-chip driver.The HMC939ALP4E comes in a RoHS compliant, compact,4 mm × 4 mm LFCSP package. See HMC939A-DIE for the dieversion of HMC939ALP4E.Applications Test instrumentation Microwave radios and very small aperture terminals (VSATs) Military radios, radars, electronic counter measures (ECMs) Broadband telecommunications systems

The HMC941A die is a broadband 5-bit GaAs IC digitalattenuator MMIC chip. Covering 0.1 to 30 GHz, theinsertion loss is less than 4 dB typical. The attenuatorbit values are 0.5 (LSB), 1, 2, 4, 8, for a total attenuationof 15.5 dB. Attenuation accuracy is excellentat less than ± 0.5 dB typical step error with an IIP3of +45 dBm. Five control voltage inputs, toggledbetween +5V and 0V, are used to select each attenuationstate.APPLICATIONS Fiber optics and broadband telecom Microwave radio and VSAT Military radios, radar and ECM Space applications

The HMC951B is a compact GaAs MMIC I/Q downconverter in a leadless RoHS compliant SMT package. This device provides a small signal conversion gain of 13 dB with a noise figure of 2 dB and 24 dB of image rejection across the frequency band. The HMC951B utilizes an LNA followed by an image reject mixer which is driven by an LO buffer amplifier. The image reject 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 HMC951B is a much smaller alternative to hybrid style image reject mixer downconverter assemblies, and is compatible with surface mount manufacturing techniques.Applications Point-to-Point & Point-to-Multi-Point Radio Military Radar, EW & ELINT Satellite Communications

The ADL5902 is a true rms responding power detector that hasa 65 dB measurement range when driven with a single-ended 50 Ω source. This feature makes the ADL5902 frequencyversatile by eliminating the need for a balun or any other form of external input tuning for operation up to 9 GHz.The ADL5902 provides a solution in a variety of high frequencysystems requiring an accurate measurement of signal power. Requiring only a single supply of 5 V and a few capacitors, it is easy to use and capable of being driven single-ended or with abalun for differential input drive. The ADL5902 can operate from 50 MHz to 9 GHz and can accept inputs from −62 dBm to at least +3 dBm with large crest factors, such as GSM, CDMA,W-CDMA, TD-SCDMA, WiMAX, and LTE modulated signals.The ADL5902 can determine the true power of a high frequency signal having a complex low frequency modulation envelope or can be used as a simple low frequency rmsvoltmeter. Used as a power measurement device, VOUT isconnected to VSET. The output is then proportional to thelogarithm of the rms value of the input. In other words, thereading is presented directly in decibels and is scaled 1.06 V per decade, or 53 mV/dB; other slopes are easily arranged. In controller mode, the voltage applied to VSET determines thepower level required at the input to null the deviation from the set point. The output buffer can provide high load currents.The ADL5902 has 1.5 mW power consumption when powereddown by a logic high applied to the PWDN pin. It powers up within approximately 5 μs to its nominal operating current of 73 mA at 25°C. The ADL5902 is supplied in a 4 mm × 4 mm,16-lead LFCSP for operation over the wide temperature rangeof −40°C to +125°C.The ADL5902 is also pin-compatible with the AD8363, 50 dBdynamic range TruPwr™ detector. This feature allows the designer to create one circuit layout for projects requiring different dynamic ranges. A fully populated RoHS-compliant evaluation board is available.Applications Power amplifier linearization/control loops Transmitter power controls Transmitter signal strength indication (TSSI) RF instrumentation

The ADM1169 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple supply systems. In addition to these functions, the ADM1169 integrates a 12-bit ADC and four 8-bit voltage output DACs. These circuits can be used to implement a closed-loop margining system that enables supply adjustment by altering either the feedback node or reference of a dc-to-dc converter using the DAC outputs. Supply margining can be performed with a minimum of external components. The margining loop can be used for in-circuit testing of a board during production (for example, to verify board functionality at –5% of nominal supplies), or it can be used dynamically to accurately control the output voltage of a dc-to-dc converter. The device also provides up to eight programmable inputs for monitoring undervoltage faults, overvoltage faults, or out-of-window faults on up to eight supplies. In addition, there are eight programmable outputs that can be used as logic enables. Six of these programmable outputs can also provide up to a 12 V output for driving the gate of an N-FET that can be placed in the path of a supply. The logical core of the device is a sequencing engine (SE). This state machine-based construction provides up to 63 different states. This design enables very flexible sequencing of the outputs, based on the condition of the inputs. A block of nonvolatile EEPROM is available that can be used to store user-defined information and may also be used to hold a number of fault records that are written by the sequencing engine defined by the user when a particular fault or sequence occurs. The ADM1169 is controlled via configuration data that can be programmed into an EEPROM. The entire configuration can be programmed using an intuitive GUI-based software package provided by Analog Devices, Inc.

The ADM1275 is a hot-swap controller that allows a circuit board to be removed from or inserted into a live backplane. It also features current and voltage readback via an integrated 12-bit analog-to-digital converter (ADC), accessed using a PMBus™ interface. The load current is measured using an internal current sense amplifier that measures the voltage across a sense resistor in the power path via the SENSE+ and SENSE− pins. A default limit of 20 mV is set, but this limit can be adjusted, if required, using a resistor divider network from the internal reference voltage to the ISET pin.The ADM1275 limits the current through the sense resistor by controlling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage—and, therefore, the load current—is maintained below the preset maximum. The ADM1275 protects the external FET by limiting the time that the FET remains on while the current is at its maximum value. This current limit time is set by the choice of capacitor connected to the TIMER pin. In addition, a foldback resistor network can be used to actively lower the current limit as the voltage across the FET is increased. This helps to maintain constant power in the FET and allows the safe operating area (SOA) to be adhered to in an effective manner.In case of a short-circuit event, a fast internal overcurrent detector responds within 370 ns and signals the gate to shut down. A 1500 mA pull-down device ensures a fast FET response. The ADM1275 features overvoltage and undervoltage protection, programmed using external resistor dividers on the UV and OV pins. A PWRGD signal can be used to detect when the output supply is valid, using the FLB pin to monitor the output. GPO pins can be configured as various output signals that can be asserted when a programmed current or voltage level is reached.The 12-bit ADC can measure the current in the sense resistor, as well as the supply voltage on the SENSE+ pin or the output voltage. A PMBus interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by a PMBus command. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever required. Up to four unique PMBus addresses can be selected, depending on the way that the ADR pin is connected. The ADM1275-1 and ADM1275-3 are available in a 20-lead QSOP and 20-lead LFCSP and have a LATCH pin that can be configured for automatic retry or latch-off when an overcurrent fault occurs. The ADM1275-2 is available in a 16-lead QSOP with latch-off mode only.Applications Power monitoring and control/power budgeting Central office equipment Telecommunication and data communication equipment PCs/servers

The ADM1490E / ADM1491E are RS-485/RS-422 transceivers with ±8 kV ESD protection and are suitable for high speed, full-duplex communication on multipoint transmission lines. In particular, the ADM1490E/ADM1491E are designed for use in motor control applications requiring communications at data rates up to 16 Mbps.The ADM1490E / ADM1491E are designed for balanced transmission lines and comply with TIA/EIA-485-A-98. The devices each have a 12 kΩ receiver input impedance for unit load RS-485 operation, allowing up to 32 nodes on the bus.The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection to ±8 kV using the human body model (HBM).The ADM1490E / ADM1491E operate from a single 5 V power supply. Excessive power dissipation caused by bus contention or output shorting is prevented by short-circuit protection and thermal circuitry. Short-circuit protection circuits limit the maximum output current to ±250 mA during fault conditions. A thermal shutdown circuit senses if the die temperature rises above 150°C and forces the driver outputs into a high impedance state under this condition.The receiver of the ADM1490E / ADM1491E contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).The ADM1490E / ADM1491E feature extremely fast and closely matched switching times. Minimal driver propagation delays permit transmission at data rates up to 16 Mbps, and low skew minimizes EMI interference.The ADM1490E/ADM1491E are fully specified over the commercial and industrial temperature ranges. The ADM1490E is available in two packages: a narrow body, 8-lead SOIC and an 8-lead MSOP. The ADM1491E is also available in two packages: a narrow body, 14-lead SOIC and a 10-lead MSOP.APPLICATIONS RS-485/RS-422 interfaces Industrial field networks High data rate motor control Multipoint data transmission systems Single-ended-to-differential signal conversion