The ADM2491E is an isolated data transceiver with ?8 kV ESD protection and is suitable for high speed, half- or full-duplex communication on multipoint transmission lines. For half-duplex operation, the transmitter outputs and the receiver inputs share the same transmission line. Transmitter output Pin Y is linked externally to receiver input Pin A, and transmitter output Pin Z to receiver input Pin B.The ADM2491E is designed for balanced transmission lines and complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E). The device employs Analog Devices, Inc., iCoupler? technology to combine a 3-channel isolator, a threestate differential line driver, and a differential input receiver into a single packageThe differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection to ?8 kV using the human body model (HBM). The logic side of the device can be powered with either a 5 V or a 3.3 V supply, whereas the bus side requires an isolated 5 V supply.The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention could cause excessive power dissipation.The ADM2491E is available in a wide body, 16-lead SOIC package and operates over the ?40?C to +85?C temperature range.Applications Isolated RS-485/RS-422 interfaces Industrial field networks INTERBUS Multipoint data transmission systems

Data Conversion IC Development Tools EVAL BRD AD5663R

The HMC6981 is a four-stage GaAs pHEMT MMIC Power Amplifier with an integrated temperature compensated on-chip Power Detector, which operates between 15 and 20 GHz. The amplifier provides 26 dB of gain, +34.5 dBm of saturated output power, and 25% PAE from a +6V supply. With an excellent output IP3 of +43.5 dBm, the HMC6981 is ideal for linear applications such as high capacity point-to-point or point-to-multi-point radios or SATCOM applications demanding +34.5 dBm of efficient saturated output power. The HMC6981 is housed in a ceramic 6 x 6 mm high frequency air cavity package which exhibits low thermal resistance and is compatible with high volume surface mount manufacturing techniques. The RF I/Os are internally matched to 50 Ohms.Applications Point-to-Point Radios Point-to-Multi-Point Radios SATCOM

The HMC394LP4(E) is a low noise GaAs HBT programmable 5-bit counter in 4x4 mm leadless surface mount package. This device allows continuous division from N= 2 to 32 at input frequencies up to 2.2 GHz. The output voltage swing is 800 mV with a duty cycle inversely proportional to N. The low additive SSB phase noise of -153 dBc/Hz at 100 KHz offset makes this counter an excellent choice for low noise synthesizer applications.APPLICATIONSProgrammable divider for offset synthesizer and variable divide by N applications: Satellite Communication Systems Point-to-Point and Point-to-Multi-Point Radios LMDS SONET

The HMC327MS8G(E) is a high efficiency GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC Power amplifier which operates between 3 and 4 GHz. The amplifier is packaged in a low cost, surface mount 8 leaded package with an exposed base for improved RF and thermal performance. With a minimum of external components, the amplifier provides 21 dB of gain, +30 dBm of saturated power at 45% PAE from a +5V supply voltage. Power down capability is available to conserve current consumption when the amplifier is not in use.Applications Wireless Local Loop

The HMC413QS16G(E) is a high efficiency GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC Power amplifier which operates between 1.6 and 2.2 GHz. The amplifier is packaged in a low cost, surface mount 16 leaded package with an exposed base for improved RF and thermal performance. With a minimum of external components, the amplifier provides 23 dB of gain, +29.5 dBm of saturated power at 42% PAE from a +5V supply voltage. The amplifi er can also operate with a 3.6V supply. Vpd can be used for full power down or RF output power/current control.Applications Cellular / PCS / 3G Portable & Infrastructure Wireless Local Loop

The HMC194AMS8E is a low-cost SPDT switch in an 8-lead MSOP packages for use in applications which require high isolation between two RF paths. The devices can control signals from DC to 3 GHz and have been optimized to provide extremely high isolation with minimal insertion loss in medium and low power applications. On chip circuitry allows positive voltage control operation at very low DC cur- rents with control inputs compatible with CMOS and most TTL logic families. RF1 and RF2 are reflective opens when ?OFF?.APPLICATIONS Cellular/PCS Base Stations Portable Wireless MMDS & WirelessLAN

The HMC500LP3(E) is a high dynamic range Vector Modulator RFIC which is targeted for RF predistortion and feed-forward cancellation circuits, as well as RF cancellation and beam forming amplitude/phase correction circuits. The I & Q ports of the HMC500LP3(E) can be used to continuously vary the phase and amplitude of RF signals by up to 360 degrees and 40 dB respectively, while supporting a 3 dB modulation bandwidth of 150 MHz. With an input IP3 of +33 dBm and input noise floor of -152 dBm/Hz (at -10 dB maximum gain setting), the input IP3/noise floor ratio is 185 dB.APPLICATIONS Wireless Infrastructure HPA & MCPA Error Correction Pre-Distortion or Feed-Forward Linearization PCS, GSM and W-CDMA Systems Beam Forming or RF Cancellation Circuits

The HMC372LP3 & HMC372LP3E are GaAs pHEMT MMIC Low Noise Amplifiers that are ideal for GSM & CDMA cellular basestation front-end receivers operating between 700 and 1000 MHz. The amplifier has been optimized to provide 1 dB noise figure, 15 dB gain and +34 dBm output IP3 from a single supply of +5V @ 100 mA. Input and output return losses are 25 and 14 dB respectively with the LNA requiring only four external components to optimize the RF Input match, RF ground and DC bias. For applications which require improved noise figure, please see the HMC617LP3(E).Applications GSM, GPRS & EDGE CDMA & W-CDMA Private Land Mobile Radio

The HMC487LP5E is a high dynamic range GaAsPHEMT MMIC 2 Watt Power Amplifiers housedin leadless 5 x 5 mm surface mount packages.Operating from 9 to 12 GHz, the amplifier provides20 dB of gain, +33 dBm of saturated power and 20%PAE from a +7V supply voltage. Output IP3 is +36 dBmtypical. The RF I/Os are DC blocked and matched to 50Ohms for ease of use. The HMC487LP5E eliminatesthe need for wire bonding, allowing use of surfacemount manufacturing techniques.Applications Point-to-Point Radios Point-to-Multi-Point Radios Test Equipment and Sensors Military End-Use