The AD8319 is a demodulating logarithmic amplifier, capable of accurately converting an RF input signal to a corresponding decibel-scaled output. It employs the progressive compression technique over a cascaded amplifier chain, each stage of which is equipped with a detector cell. The device can be used in either measurement or controller modes. The AD8319 maintains accurate log conformance for signals of 1 MHz to 8 GHz and provides useful operation to 10 GHz. The input dynamic range is typically 40 dB (re: 50 ?) with error less than ?1 dB. The AD8319 has 8 ns/10 ns response time (fall time/rise time) that enables RF burst detection to a pulse rate of beyond 50 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature conditions. A supply of 3.0 V to 5.5 V is required to power the device. Current consumption is typically 22 mA, and it decreases to 200 ?A when the device is disabled.?The AD8319 can be configured to provide a control voltage to a power amplifier or a measurement output from the VOUT pin. Because the output can be used for controller applications, special attention was paid to minimize wideband noise. In this mode, the setpoint control voltage is applied to the VSET pin.The feedback loop through an RF amplifier is closed via VOUT, the output of which regulates the amplifier?s output to a magnitude corresponding to VSET. The AD8319 provides 0 V to (VPOS ? 0.1 V) output capability at the VOUT pin, suitable for controller applications. As a measurement device, VOUT is externally connected to VSET to produce an output voltage, VOUT, that is a decreasing linear-in-dB function of the RF input signal amplitude.The logarithmic slope is ?22 mV/dB, determined by the VSET interface. The intercept is 15 dBm (re: 50 ?, CW input) using the INHI input. These parameters are very stable against supply and temperature variations.The AD8319 is fabricated on a SiGe bipolar IC process and is available in a 2 mm ? 3 mm, 8-lead LFCSP_VD for an operating temperature range of ?40?C to +85?C.ApplicationsRF transmitter PA setpoint controls and level monitoring Power monitoring in radiolink transmitters RSSI measurement in base stations, WLANs, WiMAX, and radars

The AD8332 is a dual channel ultralow noise, linear-in-dB, variable gain amplifier (VGA). Optimized for ultrasound systems, they are usable as a low noise variable gain element at frequencies up to 120 MHz.Included in each channel are an ultralow noise preamplifier (LNA), an X-AMP? VGA with 48 dB of gain range, and a selectable gain postamplifier with adjustable output limiting. The LNA gain is 19 dB with a single-ended input and differential outputs. Using a single resistor, the LNA input impedance can be adjusted to match a signal source without compromising noise performance.The 48 dB gain range of the VGA makes these devices suitable for a variety of applications. Excellent bandwidth uniformity is maintained across the entire range. The gain control interface provides precise linear-in-dB scaling of 50 dB/V for control voltages between 40 mV and 1 V. Factory trim ensures excellent part-to-part and channel-to-channel gain matching. Differential signal paths result in superb second- and third-order distortion performance and low crosstalk.The operating temperature range is -40?C to +85?C. The AD8332 is available in a 28-lead TSSOP and 32-lead LFCSP packages.The AD8332 is a dual version of the single AD8331 and quad AD8334.Applications Ultrasound and sonar time-gain controls High performance automatic gain control (AGC) systems I/Q signal processing High speed, dual ADC drivers

The AD8333 is a dual-phase shifter and I/Q demodulator that enables coherent summing and phase alignment of multiple analog data channels. It is the first solid-state device suitable forbeamformer circuits, such as those used in high performance medical ultrasound equipment featuring CW Doppler. The RF inputs interface directly with the outputs of the dual-channel, low noise preamplifiers included in the?AD8332.A divide-by-4 circuit generates the internal 0? and 90? phases of the local oscillator (LO) that drive the mixers of a pair of matched I/Q demodulators.The AD8333 can be applied as a major element in analog beamformer circuits in medical ultrasound equipment.The AD8333 features an asynchronous reset pin. When used in arrays, the reset pin sets all the LO dividers in the same state. Sixteen discrete phase rotations in 22.5? increments can be selected independently for each channel. For example, if Channel 1 is used as a reference and the RF signal applied to Channel 2 has an I/Q phase lead of 45?, Channel 2 can be phase aligned with Channel 1 by choosing the correct code.Phase shift is defined by the output of one channel relative to another. For example, if the code of Channel 1 is adjusted to 0000 and that of Channel 2 to 0001 and the same signal is applied to both RF inputs, the output of Channel 2 leads that of Channel 1 by 22.5?.The I and Q outputs are provided as currents to facilitate summation. The summed current outputs are converted to voltages by a high dynamic-range, current-to-voltage (I-V) converter, such as the AD8021, configured as a transimpedance amplifier. The resultant signal is then applied to a high resolution ADC, such as the AD7665 (16 bit/570 kSPS).The two I/Q demodulators can be used independently in other nonbeamforming applications. In that case, a transimpedance amplifier is needed for each of the I and Q outputs, four in total for the dual I/Q demodulator.The dynamic range is 159 dB/Hz at each I and Q output, but the following transimpedance amplifier is an important element in maintaining the overall dynamic range, and attention needs to be paid to optimal component selection and design.The AD8333 is available in a 32-lead LFCSP (5 mm ? 5 mm) package for the industrial temperature range of ?40?C to +85?C.Applications Medical imaging (CW ultrasound beamforming) Phased array systems (radar and adaptive antennas) Communication receivers

The AD8337 is a low noise, single-ended, linear-in-dB, general-purpose variable gain amplifier (VGA) usable at frequencies from dc to 100 MHz; the ?3 dB bandwidth is 280 MHz. Excellent bandwidth uniformity across the entire gain range and low output-referred noise makes the AD8337 ideal for gain trim applications and for driving high speed analog-to-digital converters (ADCs).Excellent dc characteristics combined with high speed make the AD8337 particularly suited for industrial ultrasound, PET scanners, and video applications. Dual-supply operation enables gain control of negative-going pulses such as generated by photodiodes or photomultiplier tubes.The AD8337 uses the popular and versatile X-AMP? architecture, exclusively from Analog Devices, Inc., with a gain range of 24 dB. The gain control interface provides precise linear-in-dB scaling of 19.7 dB/V, referenced to VCOM.The AD8337 includes an uncommitted operational current-feedback preamplifier (PrA) that operates in inverting or noninverting configurations. Using external resistors, the device can be configured for gains of 6 dB or greater. The AD8337 is characterized by a noninverting PrA gain of 2? using two external 100 ? resistors. The attenuator has a range of 24 dB, and the output amplifier has a fixed gain of 8? (18.06 dB). The lowest nominal gain range is 0 dB to 24 dB and can be shifted up or down by adjusting the preamp gain. Multiple AD8337s can be connected in series for larger gain ranges, and for interstage filtering to suppress noise and distortion, and for nulling offset voltages.The operating temperature range is ?40?C to +85?C, and it is available in an 8-lead, 3 mm ? 3 mm LFCSP.Applications Gain trim PET scanners High performance AGC systems I/Q signal processing Video Industrial and medical ultrasound Radar receivers

The AD8476 is a very low power, fully differential precision amplifier with integrated gain resistors for unity gain. It is an ideal choice for driving low power, high performance ADCs as a single-ended-to-differential or differential-to-differential amplifier. It provides a precision gain of 1, common-mode level shifting, low temperature drift, and rail-to-rail outputs for maximum dynamic range.The AD8476 also provides overvoltage protection from large industrial input voltages up to ?23 V while operating on a dual 5 V supply. Power dissipation on a single 5 V supply is only 1.5 mW.The AD8476 works well with SAR, ?-?, and pipeline converters. The high current output stage of the part allows it to drive the switched capacitor front-end circuits of many ADCs with minimal error.Unlike many differential drivers on the market, the AD8476 is a high precision amplifier. With 200 ?V maximum output offset, 39 nV/?Hz noise, and ?102 dB THD + N at 10 kHz, the AD8476 pairs well with low power, high accuracy converters.Considering its low power consumption and high precision, the slew-enhanced AD8476 has excellent speed, settling to 16-bit precision for 250 kSPS acquisition times.The AD8476 is available in a space-saving 8-lead MSOP package. It is fully specified over the ?40?C to +125?C temperature range. Applications ADC driver Differential instrumentation amplifier building block Single-ended-to-differential converter Battery powered instruments

The AD8556 is a zero-drift, sensor signal amplifier withdigitally programmable gain and output offset. Designed toeasily and accurately convert variable pressure sensor andstrain bridge outputsto a well-defined output voltage range,the AD8556 accurately amplifies many other differential orsingle-ended sensor outputs. The AD8556 uses the ADIpatented low noise auto-zero and DigiTrim? technologies tocreate an incredibly accurate and flexible signal processingsolution in a very compact footprint.Gain is digitally programmable in a wide range from 70 to1,280 through a serial data interface. Gain adjustment canbe fully simulated in-circuit and then permanently programmedwith reliable polyfuse technology. Output offsetvoltage is also digitally programmable and is ratiometric to thesupply voltage. AD8556 also features internal EMI filters on theVNEG, VPOS, FILT and VCLAMP pins.In addition to extremely low input offset voltage, low inputoffset voltage drift, and very high dc and ac CMRR, the AD8556 also includes a pull-up current source at the input pinsand a pull-down current source at the VCLAMP pin. Thisallows open wire and shorted wire fault detection. A low-passfilter function is implemented via a single low cost externalcapacitor. Output clamping set via an external reference voltageallows the AD8556 to drive lower voltage ADCs safely andaccurately.When used in conjunction with an ADC referenced to the samesupply, the system accuracy becomes immune to normal supplyvoltage variations. Output offset voltage can be adjusted with aresolution of better than 0.4% of the difference between VDDand VSS. A lockout trim after gain and offset adjustmentfurther ensures field reliability.The AD8556 is fully specified from ?40?C to +140?C.Operating from single-supply voltages of 2.7 V to 5.5 V, theAD8556 is offered in the 8-lead SOIC_N, and 4 mm ? 4 mm16-lead LFCSP_VQ.ApplicationsAutomotive SensorsPressure and Position SensorsPrecision Current SensingStrain Gages

The AD9083 is a 16-channel, 125 MHz bandwidth, continuous time ?-? (CTSD) ADC. The device features an on-chip, programmable, single-pole antialiasing filter and termination resistor that is designed for low power, small size, and ease of use. The 16 ADC cores features a first-order, CTSD modulator architecture with integrated, background nonlinearity correction logic and self cancelling dither. Each ADC features wide bandwidth inputs supporting a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. The analog input and clock signals are differential inputs. Each ADC has a signal processing tile to filter out of band shaped noise from the ?-? ADC and reduce the sample rate. Each tile contains a cascaded integrator comb (CIC) filter, a quadrature digital downconverter (DDC) with multiple finite input response (FIR) decimation filters (decimate by J block), or up to three quadrature DDC channels with averaging decimation filters for data gating applications. Users can configure the Subclass 1 JESD204B based, high speed serialized output in a variety of lane configurations (up to four), depending on the DDC configuration and the acceptable lane rate of the receiving logic device. Multiple device synchronization is supported through the SYSREF?, TRIG?, and SYNCINB? input pins. The AD9083 has flexible power-down options that allow significant power savings when desired. All of these features can be programmed using a 1.8 V capable 3-wire serial port interface (SPI). The AD9083 is available in a Pb-free, 100-ball CSP_BGA and is specified over the ?40?C to +85?C industrial temperature range.This product is protected by a US patent.APPLICATIONS Millimeter wave imaging Electronic beam forming and phased arrays Multichannel wideband receivers Electronic support measuresPRODUCT HIGHLIGHTS Continuous time, ?-? analog-to-digital converters (ADCs) support signal bandwidths of up to 125 MHz with low power and minimal filtering. Integrated digital processing blocks reduce data payload and lower overall system cost. Configurable JESD204B interface reduces printed circuit board (PCB) complexity. Flexible power-down options. SPI interface controls various product features and functions to meet specific system requirements. Small, 9 mm ? 9 mm, 100-ball CSP_BGA package, simple interface, and integrated digital processing save PCB space.

The AD9125 is a dual, 16-bit, high dynamic range TxDAC+? digital-to-analog converter (DAC) that provides a sample rate of 1000 MSPS, permitting a multicarrier generation up to the Nyquist frequency. It includes features optimized for direct conversion transmit applications, including complex digital modulation, and gain and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL537x F-MOD series from Analog Devices, Inc. A 4-wire serial port interface allows programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA. The AD9125 comes in a 72-lead LFCSP.PRODUCT HIGHLIGHTS Ultralow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies. A proprietary DAC output switching technique enhances dynamic performance. The current outputs are easily configured for various single-ended or differential circuit topologies. Flexible CMOS digital interface allows the standard 32-wire bus to be reduced to a 16-wire bus.APPLICATIONS Wireless infrastructure W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE Digital high or low IF synthesis Transmit diversity Wideband communications: LMDS/MMDS, point-to-point Cable modem termination systems

The AD9144 is a quad, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a maximum sample rate of 2.8 GSPS, permitting a multicarrier generation up to the Nyquist frequency. The DAC outputs are optimized to interface seamlessly with the ADRF6720 analog quadrature modulator (AQM) from Analog Devices, Inc. An optional 3-wire or 4-wire serial port interface (SPI) provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a typical range of 13.9 mA to 27.0 mA. The AD9144 is available in an 88-lead LFCSP.Product Highlights Greater than 1 GHz, ultrawide complex signal bandwidth enables emerging wideband and multiband wireless applications. Advanced low spurious and distortion design techniques provide high quality synthesis of wideband signals from baseband to high intermediate frequencies. JESD204B Subclass 1 support simplifies multichip synchronization in software and hardware design. Fewer pins for data interface width with a serializer/deserializer (SERDES) JESD204B eight-lane interface. Programmable transmit enable function allows easy design balance between power consumption and wake-up time. Small package size with 12 mm ? 12 mm footprint.Applications Wireless communications 3G/4G W-CDMA base stations Wideband repeaters Software defined radios Wideband communications Point-to-point Local multipoint distribution service (LMDS) and multichannel multipoint distribution service (MMDS) Transmit diversity, multiple input/multiple output (MIMO) Instrumentation Automated test equipment

The AD9154 is a quad, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a maximum sample rate of 2.4 GSPS, permitting multicarrier generation up to the Nyquist frequency in baseband mode. The AD9154 includes features optimized for direct conversion transmit applications including complex digital modulation, input signal power detection, and gain, phase, and offset compensation. The DAC outputs are?optimized to interface seamlessly with the ADRF6720-27 radio?frequency quadrature modulator (AQM) from Analog Devices,?Inc. In mix mode, the AD9154 DAC can reconstruct carriers in the second and third Nyquist Zones. A serial port interface (SPI)?provides the programming/readback of internal parameters. The full-scale output current can be programmed over a range of 4 mA to 20 mA. The AD9154 is available in two different?88-lead LFCSP packages.PRODUCT HIGHLIGHTS? Ultrawide signal bandwidth enables emerging wideband and multiband wireless applications. Advanced low spurious and distortion design techniques provide high quality synthesis of wideband signals from baseband to high intermediate frequencies. JESD204B Subclass 1 support simplifies multichip synchronization. Small package size with a 12 mm ? 12 mm footprint.APPLICATIONS Wireless communications Multicarrier LTE and GSM base stations Wideband repeaters Software defined radios Wideband communications Point to point microwave radio Transmit diversity, multiple input/multiple output (MIMO) Instrumentation Automated test equipment