BOARD EVALUATION FOR AD7939CBZ

The AD7766/AD7766-1/AD7766-2 are high performance,24-bit, oversampled SAR analog-to-digital converters (ADCs).The AD7766/AD7766-1/AD7766-2 combine the benefits of alarge dynamic range and input bandwidth, consuming 15 mW,10.5 mW, and 8.5 mW power, respectively, and are contained ina 16-lead TSSOP package.Ideal for ultralow power data acquisition (such as PCI- and USBbasedsystems), the AD7766/AD7766-1/AD7766-2 provide 24-bitresolution. The combination of exceptional SNR, wide dynamicrange, and outstanding dc accuracy make the AD7766/AD7766-1/AD7766-2 ideally suited for measuring small signal changes over awide dynamic range. This is particularly suitable for applicationswhere small changes on the input are measured on larger ac ordc signals. In such an application, the AD7766/AD7766-1/AD7766-2 accurately gather both ac and dc information.The AD7766/AD7766-1/AD7766-2 include an on-board digitalfilter (complete with linear phase response) that acts to eliminateout-of-band noise by filtering the oversampled input voltage.The oversampled architecture also reduces front-end antialiasrequirements. Other features of the AD7766/AD7766-1/AD7766-2include a SYNC/PD (synchronization/power-down) pin, allowingthe synchronization of multiple AD7766/AD7766-1/AD7766-2devices. The addition of an SDI pin provides the option of daisychaining multiple AD7766/AD7766-1/AD7766-2 devices.The AD7766/AD7766-1/AD7766-2 operate from a 2.5 V supplyusing a 5 V reference. The devices operate from ?40?C to +105?C. Applications Low power PCI/USB data acquisition systems Low power wireless acquisition systems Vibration analysis Instrumentation High precision medical acquisition

The AD7262/AD7262-5 are dual, 12-bit, high speed, low power, successive approximation ADCs that operate from a single 5 V power supply. The AD7262 features throughput rates of up to 1 MSPS per on-chip ADC. The AD7262-5 features throughput rates of up to 500 kSPS. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential analog input with a PGA. There are 14 gain settings available: ?1, ?2, ?3, ?4, ?6, ?8, ?12, ?16, ?24, ?32, ?48, ?64, ?96, and ?128.The AD7262/AD7262-5 contain four comparators. Comparator A and Comparator B are optimized for low power, while Comparator C and Comparator D have fast propagation delays. The AD7262/AD7262-5 feature a calibration function to remove any device offset error and programmable gain adjust registers to allow for input path (for example, sensor) offset and gain compensation. The AD7262/AD7262-5 have an on-chip 2.5 V reference that can be disabled if an external reference is preferred.The AD7262/AD7262-5 are ideally suited for monitoring small amplitude signals from a variety of sensors. They include all the functionality needed for monitoring the position feedback signals from a variety of analog encoders used in motor control systems.Product Highlights Integrated PGA with a variety of flexible gain settings to allow detection and conversion of low level analog signals. Each PGA is followed by a dual simultaneous sampling ADC, featuring throughput rates of 1 MSPS per ADC for the AD7262. The conversion results of both ADCs are simultaneously available on separate data lines or in succession on one data line if only one serial port is available. Four integrated comparators that can be used to count signals from pole sensors in motor control applications. Internal 2.5 V reference.

The?AD7792/AD7793 are low power, low noise, complete analog front ends for high precision measurement applications. The AD7792/AD7793 contain a low noise 16-/24-bit ?-? ADC with three differential analog inputs. The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 40 nV when the update rate equals 4.17 Hz.The devices contain a precision low noise, low drift internal band gap reference and can accept an external differential reference. Other on-chip features include programmable excitation current sources, burnout currents, and a bias voltage generator. The bias voltage generator sets the common-mode voltage of a channel to AVDD/2The devices can be operated with either the internal clock or an external clock. The output data rate from the parts is software-programmable and can be varied from 4.17 Hz to 470 Hz.The parts operate with a power supply from 2.7 V to 5.25 V. They consume a current of 400 ?A typical and are housed in a 16-lead TSSOP package.Applications Thermocouple measurements RTD measurements Thermistor measurements Gas analysis Industrial process control Instrumentation Portable instrumentation Blood analysis Smart transmitters Liquid/gas chromatography 6-digit DVM

The AD5172 / AD5173?are dual-channel, 256-position, one-time programmable (OTP) digital potentiometers that employ fuse link technology to achieve memory retention of resistance settings. The digital potentiometer, VR, and RDAC terms are used interchangeably. OTP is a cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer setting in memory more than once. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors but with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance.TheAD5172 / AD5173 are programmed using a 2-wire, I2C-compatible digital interface. Unlimited adjustments are allowed before permanently setting the resistance value. During OTP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).Unlike traditional OTP digital potentiometers, the AD5172 / AD5173 have a unique temporary OTP overwrite feature that allows for new adjustments even after a fuse is blown. However, the OTP setting is restored during subsequent power-up conditions. This allows users to treat these digital potentiometers as volatile potentiometers with a programmable preset.APPLICATIONS Systems calibration Electronics level setting Mechanical trimmers replacement in new designs Permanent factory PCB setting Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Gain control and offset adjustment

The AD9268 is a dual, 16-bit, 80 MSPS/105 MSPS/125 MSPS analog-to-digital converter (ADC). The AD9268 is designed to support communications applications where high performance, combined with low cost, small size, and versatility, is desired.The dual ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth, differential sample-and-hold analog input amplifiers that support a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. A duty cycle stabilizer is provided to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance.The ADC output data can be routed directly to the two external 16-bit output ports. These outputs can be set to either 1.8 V CMOS or LVDS.Flexible power-down options allow significant power savings, when desired.Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface.The AD9268 is available in a 64-lead LFCSP and is specified over the industrial temperature range of ?40?C to +85?C.PRODUCT HIGHLIGHTS On-chip dither option for improved SFDR performance with low power analog input. Proprietary differential input that maintains excellent SNR performance for input frequencies up to 300 MHz. Operation from a single 1.8 V supply and a separate digital output driver supply accommodating 1.8 V CMOS or LVDS outputs. Standard serial port interface (SPI) that supports various product features and functions, such as data formatting (offset binary, twos complement, or gray coding), enabling the clock DCS, power-down, test modes, and voltage reference mode. Pin compatibility with the AD9258, allowing a simple migration from 16 bits to 14 bits. The AD9268 is also pin compatible with the AD9251, AD9231, and AD9204 family of products for lower sample rate, low power applications.APPLICATIONS Communications Diversity radio systems Multimode digital receivers (3G) GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA I/Q demodulation systems Smart antenna systems General-purpose software radios Broadband data applications Ultrasound equipment

The LTC2984 measures a wide variety of temperature sensors and digitally outputs the result, in ?C or ?F, with 0.1?C accuracy and 0.001?C resolution. The LTC2984 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold junction temperatures and linearize the results. The device can also measure temperature with standard 2-, 3-, or 4-wire RTDs, thermistors, and diodes. It has 20 reconfigurable analog inputs enabling many sensor connections and configuration options. The LTC2984 includes excitation current sources and fault detection circuitry appropriate for each type of temperature sensor as well as an EEPROM for storing custom coefficients and channel configuration data.The LTC2984 allows direct interfacing to ground referenced sensors without the need for level shifters, negative supply voltages, or external amplifiers. All signals are buffered and simultaneously digitized with three high accuracy, 24-bit ?? ADC's, driven by an internal 10ppm/?C (maximum) reference.Applications Direct Thermocouple Measurements Direct RTD Measurements Direct Thermistor Measurements Custom Sensor Applications

The ADAU1966 is a high performance, single-chip DAC thatprovides 16 digital-to-analog converters (DACs) with differentialoutput using the Analog Devices, Inc., patented multibitsigma-delta (?-?) architecture. An SPI/I2C port is included,allowing a microcontroller to adjust volume and many otherparameters. The ADAU1966 operates from 2.5 V digital, 5 Vanalog and 3.3 V or 5 V input/output supplies. A linear regulatoris included to generate the digital supply voltage from the analogsupply voltage. The ADAU1966 is available in an 80-lead LQFPpackage.The ADAU1966 is designed for low EMI. This consideration isapparent in both the system and circuit design architectures.By using the on-board PLL to derive the internal master clockfrom an external LRCLK, the ADAU1966 can eliminate theneed for a separate high frequency master clock and can beused with or without a bit clock. The DACs are designed usingthe latest Analog Devices continuous time architectures tofurther minimize EMI. By using 2.5 V digital supplies, powerconsumption is minimized, and the digital waveforms are asmaller amplitude, further reducing emissions. Applications Automotive audio systems Home theater systems Digital audio effects processors

The AD7401A is a second-order, sigma-delta (?-?) modulatorthat converts an analog input signal into a high speed, 1-bit datastream with on-chip digital isolation based on the AnalogDevices, Inc., iCoupler? technology. The AD7401A operatesfrom a 5 V power supply and accepts a pseudo-differential inputsignal of ?250 mV (?320 mV full scale). The analog input iscontinuously sampled by the analog modulator, eliminating theneed for external sample-and-hold circuitry. The inputinformation is contained in the output stream as a density ofones with a data rate of up to 20 MHz. The original informationcan be reconstructed with an appropriate digital filter. Theserial I/O can use a 5 V or a 3.3 V supply (VDD2).The serial interface is digitally isolated. High speed CMOS,combined with Analog Devices, Inc., iCoupler? technology,means the on-chip isolation provides outstanding performancecharacteristics, superior to alternatives such as optocouplerdevices. The device contains an on-chip reference. TheAD7401A is offered in a 16-lead SOIC and has an operatingtemperature range of ?40?C to +125?C.Applications AC motor controls Shunt current monitoring Data acquisition systems Analog-to-digital and opto-isolator replacements

Demonstration circuit 2453A features the LTM4643 μModule® regulator, a high performance high efficiency 4 output step-down regulator. The LTM4643EV has an operating input voltage range of 4V to 14V and is able to provide up to 3A out output current from each of its phases. Each output’s voltage is programmable from 0.6V to 5.5V but the demo board is configured to provide outputs of 3.3V, 2.5V, 1.5V and 1.2V. The LTM4643EV is a complete DC/DC point of load regulator in a thermally enhanced 15mm × 9mm × 5.01mm BGA package requiring only a few input and output capacitors.