High-Performance Isolated Dual LVDS Bidirectional Buffer Evaluation Module

RF Development Tools

The ADMV1139 is an silicon on isolator (SOI), microwave, upconverter and downconverter optimized for 5G radio designs operating in the 37 GHz to 48.2 GHz frequency range.Both upconverters and downconverters offer two modes of frequency translation. One mode is conversion from and/or to complex intermediate frequency (IF) signals, which then pass through an on-chip 90? IF hybrid, known as IF mode.The other mode is a direct conversion from and/or to single-ended or differential baseband inphase/quadrature (I/Q) inputs and outputs, known as baseband mode. The I/Q baseband output common-mode voltage is programmable between 0 V and 1.5 V. The SPI provides fine adjustment of the quadrature phase to optimize I/Q demodulation performance.When the device is used as an image rejecting downconverter, the unwanted image term is typically rejected to 26 dBc, before calibration. The ADMV1139 offers a square law power detector to allow monitoring of the power levels at the mixer inputs of the downconverter.The RF receive input, RF transmit output, and local oscillator (LO) interface are all single-ended and matched to 50 ?. The on-chip RF switch provides the option to combine the transmit and receive RF ports together for time division duplex (TDD) applications.The serial port interface (SPI) provides adjustment of the quadrature phase to allow optimum sideband rejection. In addition, the SPI allows powering down the output envelope detector to reduce power consumption when carrier feedthrough optimization is not necessary.The ADMV1139 upconverter and downconverter is housed in a compact, thermally enhanced, 6 mm ? 6.5 mm, ball grid array (BGA) package. This BGA package enables the ability to heat sink the ADMV1139 from the top of the package for the most efficient thermal heat sinking. The ADMV1139 operates over the ?40?C to +95?C TC range.APPLICATIONSMillimeter-wave 5G applicationsPoint to point microwave radiosRadar and electronic warfare systemsInstrumentation and automatic test equipment (ATE)

The ADMV4828 is a silicon on insulator (SOI), 24.0 GHz to 29.5 GHz, mmW 5G beamformer. The RF integrated circuit (RFIC) is highly integrated and contains 16 independent transmit and receive channels. The ADMV4828 supports eight horizontal and eight vertical polarized antennas via independent RFV and RFH input/outputs.In transmit mode, both the RFV input and RFH input signals feed into separate amplifiers. Each path after the amplifiers splits into eight independent channels via the 1:8 power splitters. In receive mode, input signals pass through either the vertical or horizontal receive channels and combine via two independent 8:1 combiners to the common RFV pin or RFH pin. In either mode, each transmit and receive channel includes a vector modulator (VM) to control the phase, and two digital variable gain amplifiers (DVGAs) to control the amplitude. The VM provides a full 360? phase adjustment range in either transmit or receive mode to provide 6 bits of resolution for 5.625? phase steps. A phase step policy for the transmit and receive VM is provided to ensure optimum phase step performance. The total DVGA dynamic range in transmit mode is 34.5, which provides 6 bits of resolution that results in 0.5 dB amplitude steps and 5 bits of resolution that results in 1 dB amplitude steps. In receive mode, the total dynamic range is 28 dB, which provides 5 bits of resolution that results in 0.5 dB amplitude steps and 5 bits of resolution that results in 1 dB amplitude steps. The DVGAs provide a flat phase response across the full gain range. A gain policy for DVGA1 and DVGA2 is provided in the AN-2074 Application Note, ADMV4828 Application Note to ensure optimized performance across the attenuation range with 0.5 dB step resolution from 0 dB to 34.5 dB attenuation for transmit mode and 0.5 dB step resolution from 0 dB to 28 dB attenuation for receive mode. The transmit channels contain individual transmit power detectors to detect either modulated or continuous wave signals to calibrate for each channel gain as well as channel to channel gain mismatch. Each receive channel contains an RF power overload circuit (receive channel overload detection circuit) to prevent potential damage to the device as a result of blocker instances. The ADMV4828 RF ports can be connected directly to a patch antenna to create a dual polarization mmW 5G subarray.The ADMV4828 can be programmed using a 3-wire or 4-wire serial port interface (SPI). An integrated, on-chip low dropout (LDO) voltage regulator generates the 1.0 V supply for the SPI circuitry to reduce the number of supply domains required. Various SPI modes are available to enable fast startup and control during normal operation. The amplitude and phase for each channel can be set individually or multiple channels can be programmed simultaneously using the on-chip memory for beamforming. The on-chip memory can store up to 2048 beam positions that can be allocated for either transmit mode or receive mode for the horizontal channels and vertical channels. On-chip nonvolatile memory (NVM) is used to store the calibrated gain and phase offset coefficients and the reference values for each individual channel from the factory. These values are used to perform channel to channel or chip to chip calibration. In addition, four address pins (CHIP_ADDx) allow independent SPI control of up to 16 devices on the same serial lines. To control multiple devices via the same serial lines with the same instructions, activate broadcast mode via the external enable pin (BR_EN). Dedicated horizontal and vertical polarization load pins (LOAD_V and LOAD_H) provide the synchronization of all devices in the same array. A horizontal and vertical polarization transmit mode and receive mode control pin (TRX_H or TRX_V) is provided for fast switching between transmit mode and receive mode.The ADMV4828 comes in a compact, 304-ball, 10 mm ? 8.5 mm chip scale package ball grid array (CSP_BGA). The ADMV4828 operates over the ?40?C to +95?C case temperature (TC) range. This CSP_BGA package enables the ability to heatsink the ADMV4828 from the topside of the package for the most efficient thermal heatsinking and to allow flexible antenna placement on the opposite side of the printed circuit board (PCB).APPLICATIONSmmW 5G applicationBroadband communication

The ADMV9611 is a complete millimeterwave (mmWave) wireless connectivity solution in a small printed circuit assembly (PCA) format. All millimeterwave signals are confined to the printed circuit assembly, simplifying implementation. Wireless transmission is achieved using the integrated circularly polarized (CP) omnidirectional patch antenna array, which enables communication in many applications, including rotation. Following the antenna array is an integrated diplexer that provides isolation between the separate transmit and receive paths on the board, which reduces multipath distortion. The receive path integrates all components to demodulate the 58.0125 GHz frequency to baseband signals. The flexible receiver gain control is programmable over a wide range to easily accommodate the required link budget. The receiver baseband outputs are dc-coupled and can provide over 500 mV of differential output signal level. Likewise, the transmit path integrates all components to modulate input baseband signals to 63 GHz. The transmitter has programmable gain control to maintain level transmit power. The transmit baseband inputs are dc-coupled and have a broad common-mode input range. Synthesizers are integrated to maintain excellent frequency stability vs. temperature. The simple amplitude modulation (AM) scheme eliminates the need for external data converters, allowing for bit rates of greater than 100 Mbps. On-board power management is integrated to a single 5 V voltage rail to power the ADMV9611.Together with the ADMV9621, the ADMV9611 provides a complete, full duplexed 60 GHz data link for high speed data transmission in the unlicensed 60 GHz industrial, scientific, and medical (ISM) band.APPLICATIONS60 GHz short data link for industrial and medical high data rate applicationsHigh speed data for rotating applications, such as slip rings and magnetic resonance imaging systems

The LTC3838 is a dual, PolyPhase? synchronous step-down DC/DC switching regulator controller. Two independent channels drive all N-channel power MOSFETs. The controlled on-time, valley current mode control architecture allows for fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUT and load current. Its load-release transient detection feature significantly reduces overshoot at low output voltages.Differential output voltage sensing, along with a precision internal reference, offers an accurate ?0.67% output regulation on Channel 1, even if the remote output ground deviates from local ground by ?500mV. The second channel can either provide an independent ?1% output, or together with the first channel of this controller, serve as one of the PolyPhase channels for a single-output voltage.The switching frequency can be programmed from 200kHz to 2MHz with an external resistor, and can be synchronized to an external clock. Very low tON and tOFF times allow for near 0% and near 100% duty cycles, respectively. Voltage tracking soft start-up and multiple safety features are provided.See below for a comparison of LTC3838, LTC3838-1 and LTC3838-2. Part Number Description LTC3838 ? ?0.67% Differential Output Voltage Accuracy Over Temperature on Channel 1, ?1% Output Regulation on Channel 2, Separate Per Channel 30mV to 100mV Current Sense Range Controls LTC3838-1 ? ?0.67% Differential Output Voltage Accuracy Over Temperature on Both Channel 1 and Channel 2, Single Pin 30mV/60mV Current Sense Range Controls LTC3838-2 ?0.67% Differential Output Voltage Accuracy With Internal Reference on Channel 1, ?4mV Differential with External Reference Voltage on Channel 2, Fixed 30mV Current Sense Range Applications Distributed Power Systems Point-of-Load Converters Computing Systems Data Communication Systems

The LT3976 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 40V. Low quiescent current design consumes only 3.3?A of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. The LT3976 can supply up to 5A of load current and has current limit foldback to limit power dissipation during short-circuit. A low dropout voltage of 500mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank.An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 75m? switch is included on the die along with a boost Schottky diode. An accurate 1.02V threshold enable pin can be driven directly from a microcontroller or used as a programmable undervoltage lockout. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91.6% of the programmed output voltage. The LT3976 is available in small 16-lead MSOP and 24-lead 3mm ? 5mm QFN packages with exposed pad for low thermal resistance.Applications Automotive Battery Regulation Portable Products Industrial Supplies

The LTC6905 precision, programmable silicon oscillator is easy to use and occupies very little board space. It requires only a single resistor to set the output frequency from 17MHz to 170MHz with a typical frequency error of 0.5% or less.The LTC6905 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. Operation is simple: A single resistor, RSET, between 10K to 25K is used to set the frequency, and an internal three-state divider (DIV input) allows for division of the master clock by 1, 2 or 4, providing three frequencies for each RSET value.The LTC6905 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency. The oscillator can be easily programmed using the simple formula outlined below:See first page of Data Sheet for formula?For higher accuracy, fixed frequency versions that includean internal frequency-setting resistor, see the LTC6905-XXX Series datasheet.Applications High Frequency Precision Oscillator High Speed Data Bus Clock Fixed Crystal Oscillator Replacement Ceramic Oscillator Replacement

DC373A-B: Demo Board for the LT1725 General Purpose Isolated Flyback Controller.

The LT5511 mixer is designed to meet the high linearity requirements of cable TV infrastructure downstream transmitters and wireless infrastructure transmit systems. The IC includes a differential LO buffer amplifier driving a double-balanced mixer. The LO, RF and IF ports can be easily matched to a broad range of frequencies for different applications. The high performance capability of the LO buffer allows the use of a single-ended source, thus eliminating the need for an LO balun.The LT5511 mixer delivers +17dBm typical input 3rd order intercept point at 950MHz, and +15.5dBm IIP3 at 1900MHz, with IF input signal levels of ? 5dBm. The input 1dB compression point is typically +6dBm.Applications CATV Downlink Infrastructure Wireless Infrastructure High Linearity Mixer Applications