The?AD7798/AD7799 are low power, low noise, complete analog front ends for high precision measurement applications. The AD7798/AD7799 contains 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 27 nV for the AD7799 and 40 nV for the AD7798 when the update rate equals 4.17 Hz.On-chip features include a low-side power switch, reference detect, programmable digital output pins, burnout currents, and an internal clock oscillator. The output data rate from the part is software-programmable and can be varied from 4.17 Hz to 470 Hz.The part operates with a power supply from 2.7 V to 5.25 V. The AD7798 consumes a current of 300 ?A typical, whereas the AD7799 consumes 380 ?A typical. Both devices are housed in a 16-lead TSSOP package.Applications Weigh scales Pressure measurement Strain gauge transducers Gas analysis Industrial process control Instrumentation Portable instrumentation Blood analysis Smart transmitters Liquid/gas chromotography 6-digit DVM

The AD7873 is a 12-bit successive approximation ADC with a synchronous serial interface and low on resistance switches for driving touch screens. The AD7873 operates from a single 2.2 V to 5.25 V supply, with a throughput rate of 125 kSPS.The AD7873 features direct battery measurement, temperature measurement, and touch pressure measurement. The AD7873 also has an on-board reference of 2.5 V that can be used for the auxiliary input, battery monitor, and temperature measurement modes. When not in use, the internal reference can be shut down to conserve power. An external reference can also be applied and varied from 1 V to VCC with an analog input range from 0 V to VREF. The device includes a shutdown mode that reduces the current consumption to less than 1 ?A.The AD7873 features on-board switches. This, coupled with low power and high speed operation, makes the device ideal for battery-powered systems with resistive touch screens. The part is available in a 16-lead, 0.15 inch quarter size outline package (QSOP), a 16-lead, thin shrink small outline package (TSSOP), and a 16-lead, lead frame chip scale package (LFCSP).PRODUCT HIGHLIGHTS Ratiometric conversion mode available, eliminating errors due to on-board switch resistances. On-board temperature sensor: ?40?C to +85?C. Battery monitor input. Touch pressure measurement capability. Low power consumption of 1.37 mW maximum with the reference off, or 2.41 mW typical with the reference on, at 125 kSPS and VCC at 3.6 V. Package options include 4 mm ? 4 mm LFCSP. Analog input range from 0 V to VREF. Versatile serial I/O ports.APPLICATIONS Personal digital assistants Smart hand-held devices Touch screen monitors Point-of-sale terminals Pagers

The AD7887 is a high speed, low power, 12-bit analog-to-digital converter (ADC) that operates from a single 2.7 V to 5.25 V power supply. The AD7887 is capable of 125 kSPS throughput rate. The input track-and-hold acquires a signal in 500 ns and features a single-ended sampling scheme. The output coding for the AD7887 is straight binary, and the part is capable of converting full power signals of up to 2.5 MHz.The AD7887 can be configured for either dual- or single-channel operation via the on-chip control register. There is a default single-channel mode that allows the AD7887 to be operated as a read-only ADC. In single-channel operation, there is one analog input (AIN0) and the AIN1/VREF pin assumes its VREF function. This VREF pin allows the user access to the part?s internal 2.5 V reference, or the VREF pin can be overdriven by an external reference to provide the reference voltage for the part. This external reference voltage has a range of 2.5 V to VDD. The analog input range on AIN0 is 0 to VREF.In dual-channel operation, the AIN1/VREF pin assumes its AIN1 function, providing a second analog input channel. In this case, the reference voltage for the part is provided via the VDD pin. As a result, the input voltage range on both the AIN0 and AIN1 inputs is 0 to VDD.CMOS construction ensures low power dissipation of typically 2 mW for normal operation and 3 ?W in power-down mode. The part is available in an 8-lead, 0.15-inch-wide narrow body SOIC and an 8-lead MSOP package.Product HighlightsSmallest 12-bit dual-/single-channel ADC; 8-lead MSOP package.Lowest power 12-bit dual-/single-channel ADC.Flexible power management options, including automatic power-down after conversion.Read-only ADC capability.Analog input range from 0 V to VREF.Versatile serial input/output port (SPI/QSPI/MICROWIRE/ DSP compatible).ApplicationsBattery-powered systems (personal digital assistants, medical instruments, mobile communications)Instrumentation and control systemsHigh speed modems

The AD7944 is a 14-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7944 samples an analog input, IN+, between 0 V and VREF?with respect to a ground sense, IN?. The AD7944 features avery high sampling rate turbo mode (TURBO high) and areduced power normal mode (TURBO low) for low powerapplications where the power is scaled with the throughput.In normal mode (TURBO low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chainseveral ADCs on a single 3-wire bus and provide an optional busyindicator. The serial interface is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.The AD7944 is available in a 20-lead LFCSP with operationspecified from ?40?C to +85?C.APPLICATIONS Battery-powered equipment Communications ATE Data acquisition systems Medical instruments

The AD7983 is a 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN?. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.The AD7983 is housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from ?40?C to +85?.APPLICATIONS Automated test equipment Data acquisition systems Medical instruments Machine automation

The AD7997?/ AD7998 are 8-channel, 10- and 12-bit, low power,successive approximation ADCs with an I2C-compatibleinterface. The parts operate from a single 2.7 V to 5.5 V powersupply and feature a 2 ?s conversion time. The parts contain an8-channel multiplexer and track-and-hold amplifier that canhandle input frequencies up to 11 MHz.The AD7997 / AD7998 provide a 2-wire serial interface that iscompatible with I2C interfaces. Each part comes in two versions,AD7997-0 / AD7998-0 and AD7997-1 / AD7998-1, and eachversion allows at least two different I2C addresses. The I2C interface on the AD7997-0/AD7998-0 supports standard andfast I2C interface modes. The I2C interface on the AD7997-1 / AD7998-1 supports standard, fast, and high speed I2C interface modes.The AD7997 / AD7998 normally remain in a shutdown statewhile not converting, and power up only for conversions. Theconversion process can be controlled using the CONVST pin,by a command mode where conversions occur across I2C writeoperations or an automatic conversion interval mode selectedthrough software control. The AD7997 / AD7998 require an external reference that shouldbe applied to the REFIN pin and can be in the range of 1.2 V toVDD. This allows the widest dynamic input range to the ADC. On-chip limit registers can be programmed with high andlow limits for the conversion result, and an open-drain, out-of-range indicator output (ALERT) becomes active when theprogrammed high or low limits are violated by the conversionresult. This output can be used as an interrupt.PRODUCT HIGHLIGHTS 2 ?s conversion time with low power consumption. I2C-compatible serial interface with pin-selectable addresses. Two AD7997/AD7998 versions allow five AD7997/AD7998 devices to be connected to the same serial bus. The parts feature automatic shutdown while not converting to maximize power efficiency. Current consumption is 1 ?A max when in shutdown mode at 3V. Reference can be driven up to the power supply. Out-of-range indicator that can be software disabled or enabled. One-shot and automatic conversion rates. Registers store minimum and maximum conversion results.

The ADAQ4001 is a ?Module? precision data acquisition (DAQ), signal chain solution that reduces the development cycle of a precision measurement system by transferring the signal chain design challenge of component selection, optimization, and layout from the designer to the device. Using system-in-package (SIP) technology, the ADAQ4001 reduces end system component count by combining multiple common signal processing and conditioning blocks into a single device. These blocks include a high resolution 16-bit, 2 MSPS successive approximation register (SAR), analog-to-digital converter (ADC), a low noise, fully differential ADC driver amplifier (FDA), and a stable reference buffer. Using Analog Devices, Inc., iPassives? technology, the ADAQ4001 also incorporates crucial passive components with superior matching and drift characteristics to minimize temperature dependent error sources and to offer optimized performance (see Figure 1 in the data sheet). Housing this signal chain solution in a small, 7 mm ? 7 mm, 0.80 mm pitch, 49-ball CSP_BGA enables compact form factor designs without sacrificing performance and simplifies end system bill of materials management. This level of system integration makes the ADAQ4001 much less sensitive to printed circuit board (PCB) layout while still providing flexibility to adapt to a wide range of signal levels. The serial peripheral interface (SPI)-compatible, serial user interface is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using a separate VIO supply. Specified operation of the ADAQ4001 is from ?40?C to +125?C.APPLICATIONSAutomatic test equipmentMachine automationProcess controlsMedical instrumentationDigital control loops

The ADAQ4003 is a ?Module? precision data acquisition (DAQ), signal chain solution that reduces the development cycle of a precision measurement system by transferring the signal chain design challenge of component selection, optimization, and layout from the designer to the device.Using system-in-package (SIP) technology, the ADAQ4003 reduces end system component count by combining multiple common signal processing and conditioning blocks into a single device. These blocks include a high resolution 18-bit, 2 MSPS successive approximation register (SAR), analog-to-digital converter (ADC), a low noise, fully differential ADC driver amplifier (FDA), and a stable reference buffer.Using Analog Devices, Inc., iPassives? technology, the ADAQ4003 also incorporates crucial passive components with superior matching and drift characteristics to minimize temperature dependent error sources and to offer optimized performance (see Figure 1 in the data sheet). Housing this signal chain solution in a small, 7 mm ? 7 mm, 0.80 mm pitch, 49-ball CSP_BGA enables compact form factor designs without sacrificing performance and simplifies end system bill of materials management. This level of system integration makes the ADAQ4003 much less sensitive to printed circuit board (PCB) layout while still providing flexibility to adapt to a wide range of signal levels.The serial peripheral interface (SPI)-compatible, serial user interface is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using a separate VIO supply. Specified operation of ADAQ4003 is from ?40?C to +125?C.APPLICATIONS Automatic test equipment Machine automation Process controls Medical instrumentation Digital control loops

The ADAS1000 measures electrocardiac (ECG) signals, thoracic impedance, pacing artifacts,and lead-on/lead-off status and output this information in theform of a data frame supplying either lead/vector or electrodedata at programmable data rates. Its low power and small sizemake it suitable for portable, battery-powered applications.The high performance also makes it suitable for higher enddiagnostic machines. The ADAS1000 is a full-featured, 5-channel ECG includingrespiration and pace detection, while the ADAS1000-1 offersonly ECG channels with no respiration or pace features. Similarly,the ADAS1000-2 is a subset of the main device and is configuredfor gang purposes with only the ECG channels enabled (norespiration, pace, or right leg drive).The ADAS1000/ADAS1000-1/ADAS1000-2 are designed tosimplify the task of acquiring and ensuring quality ECG signals.They provide a low power, small data acquisition system forbiopotential applications. Auxiliary features that aid in betterquality ECG signal acquisition include multichannel averageddriven lead, selectable reference drive, fast overload recovery,flexible respiration circuitry returning magnitude and phaseinformation, internal pace detection algorithm operating onthree leads, and the option of ac or dc lead-off detection. Severaldigital output options ensure flexibility when monitoring andanalyzing signals. Value-added cardiac post processing isexecuted externally on a DSP, microprocessor, or FPGA.Because ECG systems span different applications, theADAS1000/ADAS1000-1/ADAS1000-2 feature a power/noisescaling architecture where the noise can be reduced at theexpense of increasing power consumption. Signal acquisitionchannels can be shut down to save power. Data rates can bereduced to save power.To ease manufacturing tests and development as well as offerholistic power-up testing, the ADAS1000/ADAS1000-1/ADAS1000-2 offer a suite of features, such as dc and ac testexcitation via the calibration DAC and cyclic redundancy check(CRC) redundancy testing, in addition to readback of allrelevant register address space.The input structure is a differential amplifier input, therebyallowing users a variety of configuration options to best suittheir application.The ADAS1000/ADAS1000-1/ADAS1000-2 are available in twopackage options, a 56-lead LFCSP package and a 64-lead LQFPpackage. Both packages are specified over a ?40?C to +85?Ctemperature range. APPLICATIONSECG: Monitor & Diagnostic Bedside Patient Monitoring Portable Telemetry Holter AED Cardiac Defibrillators Ambulatory Monitors Pace Maker Programmer Patient Transport Stress testing

The AD5544/AD5554 quad, 16-/14-bit, current output, digital-to-analog converters (DACs) are designed to operate from 2.7 V to 5.5 V supply range.The applied external reference input voltage (VREFX) determines the full-scale output current. Integrated feedback resistors (RFB) provide temperature-tracking, full-scale voltage outputs when combined with an external I-to-V precision amplifier.A double-buffered serial data interface offers high speed, 3-wire, SPI- and microcontroller-compatible inputs using serial data in (SDI), a chip select (CS), and clock (CLK) signals. In addition, a serial data out pin (SDO) allows for daisy-chaining when multiple packages are used. A common, level-sensitive, load DAC strobe (LDAC) input allows the simultaneous update of all DAC outputs from previously loaded input registers. Additionally, an internal power-on reset forces the output voltage to 0 at system turn-on. An MSB pin allows system reset assertion (RS) to force all registers to zero code when MSB = 0, or to half-scale code when MSB = 1.The AD5544 is packaged in the compact 28-lead SSOP and 32-lead LFCSP. ?The AD5554 is ?packaged in the compact 28-lead SSOP.Applications Automatic test equipment Instrumentation Digitally controlled calibration