The AD8334 is an ultralow noise, quad channel linear-in-dB variable gain amplifier (VGA). Although optimized for ultrasound systems, it may be used as a low noise variable gain control in any application whose operating frequency is less than 100 MHz.Included in each channel are an ultralow noise preamp (LNA), an X-AMP? VGA with 48 dB of gain range, and a selectable gain postamp 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 AD8334 is a quad version of the single AD8331 and dual AD8332.For information on specs, see the AD8331/AD8332/AD8334 datasheet.Applications Ultrasound and sonar time-gain controls High performance automatic gain control (AGC) systems I/Q signal processing High speed, dual ADC drivers

The AD8342 is a high performance, broadband active mixer. It is well suited for demanding receive-channel applications that require wide bandwidth on all ports and very low intermodulation distortion and noise figure.The AD8342 provides a typical conversion gain of 3.7 dB with an RF frequency of 238 MHz. The integrated LO driver presents a 50 ? input impedance with a low LO drive level, helping to minimize the external component count.The differential high impedance broadband RF port allows for easy interfacing to both active devices and passive filters. The RF input accepts input signals as large as 1.6 Vp-p or 8 dBm (relative to 50 ?) at P1dB.The open-collector differential outputs provide excellent balance and can be used with a differential filter or IF amplifier, such as the AD8370, AD8375, AD8351, AD8352, or ADL5561. These outputs can also be converted to a single-ended signal using a matching network or a balun transformer. The outputs are capable of swinging 2Vp-p when biased to the VPOS supply rail.The AD8342 is fabricated on an Analog Devices, Inc., proprietary, high performance SiGe IC process. The AD8342 is available in a 16-lead LFCSP. It operates over a ?40?C to +85?C temperature range. An evaluation board is also available.APPLICATIONS Cellular base station receivers ISM receivers Radio links RF instrumentation

The AD8344 is a high performance, broadband active mixer. It is well suited for demanding receive-channel applications thatrequire wide bandwidth on all ports and very low intermodulation distortion and noise figure.The AD8344 provides a typical conversion gain of 4.5 dB at 890 MHz. The integrated LO driver supports a 50 ? inputimpedance with a low LO drive level, helping to minimize external component count.The single-ended 50 ? broadband RF port allows for easy interfacing to both active devices and passive filters. The RFinput accepts input signals as large as 1.7 V p-p or 8.5 dBm (re: 50 ?) at P1dB.The open-collector differential outputs provide excellent balance and can be used with a differential filter or IF amplifier,such as the AD8369 or AD8351. These outputs may also be converted to a single-ended signal through the use of a matchingnetwork or a transformer (balun).When centered on the VPOS supply voltage, each of the differential outputs may swing2.5 V p-p.The AD8344 is fabricated on an Analog Devices proprietary, high performance SiGe IC process. The AD8344 is availablein a 16-lead LFCSP package. It operates over a ?40?C to +85?C temperature range.An evaluation board is also available.ApplicationsCellular base station receiversISM receiversRadio linksRF Instrumentation

The AD8362 is a true rms-responding power detector that has a 65 dB measurement range. It is intended for use in a variety of high frequency communication systems and in instrumentation requiring an accurate response to signal power. It is easy to use, requiring only a single supply of 5 V and a few capacitors. It operates from arbitrarily low frequencies to over 3.8 GHz and accepts inputs from ?52 dBm to +8 dBm with crest factors that are typical of quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM) modulation schemes.The input signal is applied to a resistive ladder attenuator that comprises the input stage of a variable gain amplifier (VGA). The 12 tap points are smoothly interpolated using a proprietary technique to provide a continuously variable attenuator, which is controlled by a voltage applied to the VSET pin. The resulting signal is applied to a high performance broadband amplifier. Its output is measured by an accurate square-law detector cell. The fluctuating output is then filtered and compared with the output of an identical squarer, whose input is a fixed dc voltage applied to the VTGT pin, usually the accurate reference of 1.25 V pro-vided at the VREF pin.The difference in the outputs of these squaring cells is integrated in a high gain error amplifier, generating a voltage at the VOUT pin with rail-to-rail capabilities. In a controller mode, this low noise output can be used to vary the gain of a host system?s RF amplifier, thus balancing the setpoint against the input power. Optionally, the voltage at VSET can be a replica of the RF signal?s amplitude modulation, in which case the overall effect is to remove the modulation component prior to detection and low-pass filtering. The corner frequency of the averaging filter can be lowered without limit by adding an external capacitor at the CLPF pin. The AD8362 can be used to determine the true power of a high frequency signal having a complex low frequency modulation envelope, or simply as a low frequency rms volt-meter. The high-pass corner generated by its offset-nulling loop can be lowered by a capacitor added on the CHPF pin.Used as a power measurement device, VOUT is strapped to VSET. The output is then proportional to the logarithm of the rms value of the input. In other words, the reading is presented directly in decibels and is conveniently scaled 1 V per decade, or 50 mV/dB; other slopes are easily arranged. In controller modes, the voltage applied to VSET determines the power level required at the input to null the deviation from the setpoint. The output buffer can provide high load currents.The AD8362 has 1.3 mW power consumption when powered down by a logic high applied to the PWDN pin. It powers up within about 20 ?s to its nominal operating current of 20 mA at 25?C. The AD8362 is supplied in a 16-lead TSSOP for operation over the temperature range of ?40?C to +85?C.ApplicationsPower amplifier linearization/control loops Transmitter power controls Transmitter signal strength indication (TSSI) RF instrumentation

The AD8366 is a matched pair of fully differential, low noise and low distortion, digitally programmable variable gain amplifiers (VGAs). The gain of each amplifier can be programmed separately or simultaneously over a range of 4.5 dB to 20.25 dB in steps of 0.25 dB. The amplifier offers flat frequency performance from dc to 70 MHz, independent of gain code.The AD8366 offers excellent spurious-free dynamic range, suitable for driving high resolution analog-to-digital converters (ADCs). The NF at maximum gain is 11.4 dB at 10 MHz and increases ~2 dB for every 4 dB decrease in gain. Over the entire gain range, the HD3/HD2 are better than ?90 dBc for 2 V p-p at the output at 10 MHz into 200 ?. The two-tone intermodulation distortion of ?90 dBc into 200 ? translates to an OIP3 of 45 dBm (38 dBVrms). The differential input impedance of 200 ? provides a well-defined termination. The differential output has a low impedance of ~25 ?.The output common-mode voltage defaults to VPOS/2 but can be programmed via the VCMA and VCMB pins over a range of voltages. The input common-mode voltage also defaults to VPOS/2 but can be driven down to 1.5 V. A built-in, dc offset compensation loop can be used to eliminate dc offsets from prior stages in the signal chain. This loop can also be disabled if dc-coupled operation is desired.The digital interface allows for parallel or serial mode gain programming. The AD8366 operates from a 4.75 V to 5.25 V supply and consumes typically 180 mA. When disabled, the part consumes roughly 3 mA. The AD8366 is fabricated using Analog Devices, Inc., advanced silicon-germanium bipolar process, and it is available in a 32-lead exposed paddle LFCSP package. Performance is specified over the ?40?C to +85?C temperature range.ApplicationsBaseband I/Q receiversDiversity receiversWideband ADC drivers?

The AD8452-EVALZ is a platform for the AD8452, designed for investigation of the AD8452 analog and pulse-width modulation (PWM) features and performance without the added complications of a driver and/or switch mode power supply (SMPS) design. For convenience, a precision 5 V reference IC and four trim pots are built in to the evaluation board, for driving the battery current and voltage ISET and VSET inputs. All device pins are accessible with test loops or probe landings. At the same time, the AD8452-EVALZ has the flexibility to interface and drive a typical half bridge inductor input SMPS with output levels in the 1 A to 15 A range. SMPS and associated components are specified and sourced by the user. The AD8452 is intended for use as the core controller for commercial battery test and formation systems. Its advanced miniaturization and extraordinarily high level of analog precision meet the challenge of mass production of high energy density storage lithium ion packs for transportation and energy storage in homes. When working with the evaluation board, consult the AD8452 data sheet for a detailed device Theory of Operation and for additional information in conjunction with user guide UG-1180.

The?AD8494/AD8495/AD8496/AD8497?are precision instrumentation amplifiers with thermocouple cold junction compensators on an integrated circuit. They produce a high level (5 mV/?C) output directly from a thermocouple signal by combining an ice point reference with a precalibrated amplifier. They can be used as standalone thermometers or as switched output setpoint controllers using either a fixed or remote setpoint control.The AD8494/AD8495/AD8496/AD8497 can be powered from a single-ended supply (less than 3 V) and can measure temperatures below 0?C by offsetting the reference input. To minimize self-heating, an unloaded AD849x typically operates with a total supply current of 180 ?A, but it is also capable of delivering in excess of ?5 mA to a load.The AD8494 and AD8496 are precalibrated by laser wafer trimming to match the characteristics of J type (iron-constantan) thermocouples; the AD8495 and AD8497 are laser trimmed to match the characteristics of K type (chromel-alumel) thermo-couples. See Table 1 on the data sheet for the optimized ambient temperature range of each part.The AD8494/AD8495/AD8496/AD8497 allow a wide variety of supply voltages. With a 5 V single supply, the 5 mV/?C output allows the devices to cover nearly 1000 degrees of a thermo-couple?s temperature range.The AD8494/AD8495/AD8496/AD8497 work with 3 V supplies, allowing them to interface directly to lower supply ADCs. They can also work with supplies as large as 36 V in industrial systems that require a wide common-mode input range.Product Highlights Complete, precision laser wafer trimmed thermocouple signal conditioning system in a single IC package. Flexible pinout provides for operation as a setpoint controller or as a standalone Celsius thermometer. Rugged inputs withstand 4 kV ESD and provide over-voltage protection (OVP) up to VS ? 25 V. Differential inputs reject common-mode noise on the thermocouple leads. Reference pin voltage can be offset to measure 0?C on single supplies. Available in a small, 8-lead MSOP that is fully RoHS compliant.Applications K type thermocouple temperature measurement Setpoint controller Celsius thermometer Universal cold junction compensator White goods (oven, stove top) temperature measurements Exhaust gas temperature sensing Catalytic converter temperature sensing div#landing_page_sec ul { padding:0 0 15px 10px; margin:0px; } div#landing_page_sec li { padding:3px 0 2px 20px; margin:0px; list-style:none; background:url(/static/imported-files/embedded_html/images/li_img.gif) no-repeat 7px 9px; display:block; color:#000000; font-family: Arial, Helvetica, sans-serif; }

The AD9114/AD9115/AD9116/AD9117 are pin-compatible dual, 8-/10-/12-/14-bit, low power digital-to-analog converters (DACs) that provide a sample rate of 125 MSPS. These TxDAC? converters are optimized for the transmit signal path of communication systems. All the devices share the same interface, package, and pinout, providing an upward or downward component selection path based on performance, resolution, and cost.The AD9114/AD9115/AD9116/AD9117 offer exceptional ac and dc performance and support update rates up to 125 MSPS.The flexible power supply operating range of 1.8 V to 3.3 V and low power dissipation of the AD9114/AD9115/AD9116/AD9117 make them well suited for portable and low power applications.Product Highlights Low Power. DACs operate on a single 1.8 V to 3.3 V supply; total power consumption reduces to 225 mW at 100 MSPS. Sleep and power-down modes are provided for low power idle periods. CMOS Clock Input. High speed, single-ended CMOS clock input supports a 125 MSPS conversion rate. Easy Interfacing to Other Components. Adjustable output common mode from 0 V to 1.2 V allows for easy interfacing to other components that accept common-mode levels greater than 0 V.Applications Wireless infrastructures Picocell, femtocell base stations Medical instrumentation Ultrasound transducer excitation Portable instrumentation Signal generators, arbitrary waveform generators

The AD9148 is a quad, 16-bit, high dynamic range, digital-toanalogconverter (DAC) that provides a sample rate of 1000 MSPS.These devices include features optimized for direct conversiontransmit applications, including gain, phase, and offset compensation.The DAC outputs are optimized to interface seamlessly withanalog quadrature modulators such as the?ADL5371/ADL5372/ADL5373/ADL5374/ADL5375/. A serial peripheral interface (SPI)is provided for programming of the internal device parameters.Full-scale output current can be programmed over a range of 10 mAto 30 mA. The devices operate from 1.8 V and 3.3 V supplies fora total power consumption of 3 W at the maximum sample rate.They are enclosed in 196-ball chip scale package ball grid arraywith the option of an attached heat spreader..Product Highlights1. Low noise and inter-modulation distortion (IMD) enable highquality synthesis of wideband signals from baseband to highintermediate frequencies.2. A proprietary DAC output switching technique enhancesdynamic performance.3. The current outputs are easily configured for various singleendedor differential circuit topologies.4. LVDS data input interface includes FIFO to ease input timing.Applications Wireless infrastructure LTE, TD-SCDMA, WiMAX, WCDMA, CDMA2000, GSM MIMO/Transmit diversity Digital high or low IF synthesis

The AD91641 is a high performance, 16-bit digital-to-analog converter (DAC) and direct digital synthesizer (DDS) that supports update rates to 6 GSPS. The DAC core is based on a quad-switch architecture coupled with a 2? interpolator filter that enables an effective DAC update rate of up to 12 GSPS in some modes. The high dynamic range and bandwidth makes these DACs ideally suited for the most demanding high speed radio frequency (RF) DAC applications.The DDS consists of a bank of 32, 32-bit numerically controlled oscillators (NCOs), each with its own phase accumulator.When combined with a 100 MHz serial peripheral interface (SPI) and fast hop modes, phase coherent fast frequency hopping (FFH) is enabled, with several modes to support multiple applications.In baseband mode, wide analog bandwidth capability combines with high dynamic range to support DOCSIS 3.1 cable infrastructure compliance from the minimum of one carrier up to the full maximum spectrum of 1.791 GHz of signal bandwidth. A 2? interpolator filter (FIR85) enables the AD9164 to be configured for lower data rates and converter clocking to reduce the overall system power and ease the filtering requirements. In Mix-Mode? operation, the AD9164 can reconstruct RF carriers in the second and third Nyquist zones up to 7.5 GHz while still maintaining exceptional dynamic range. The output current can be programmed from 8 mA to 38.76 mA. The AD9164 data interface consists of up to eight JESD204B serializer/deserializer (SERDES) lanes that are programmable in terms of lane speed and number of lanes to enable application flexibility.An SPI interface configures the AD9164 and monitors the status of all registers. The AD9164 is offered in a 165-ball, 8 mm ? 8 mm, 0.5 mm pitch CSP_BGA package, and a 169-ball, 11 mm ? 11 mm, 0.8 mm pitch, CSP_BGA package, including a leaded ball option.Product Highlights High dynamic range and signal reconstruction bandwidth supports RF signal synthesis of up to 7.5 GHz. Up to eight lanes JESD204B SERDES interface flexible in terms of number of lanes and lane speed. Bandwidth and dynamic range to meet DOCSIS 3.1 compliance and multiband wireless communications standards with margin.?Applications Broadband communications systems DOCSIS 3.1 CMTS/ video on demand (VOD)/edge quadrature amplitude modulation (EQAM) Wireless communications infrastructure W-CDMA, LTE, LTE-A, point to point