The AD7667 is a 16-bit, 1 MSPS, charge redistribution SARanalog-to-digital converter that operates from a single 5 Vpower supply. The part contains a high speed 16-bit samplingADC, an internal conversion clock, internal reference, errorcorrection circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp), afast mode (Normal) for asynchronous applications, and areduced power mode (Impulse) for low power applicationswhere power is scaled with the throughput. The AD7667 ishardware factory-calibrated and comprehensively tested toensure ac parameters such as signal-to-noise ratio (SNR) andtotal harmonic distortion (THD) in addition to the moretraditional dc parameters of gain, offset, and linearity. Operationis specified from ?40?C to +85?C. PRODUCT HIGHLIGHTS Fast Throughput. The AD7667 is a 1 MSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. Superior INL. The AD7667 has a maximum integral nonlinearity of 2.0 LSBs with no missing 16-bit codes. Internal Reference. The AD7667 has an internal reference with a typical temperature drift of 3 ppm/?C. Single-Supply Operation. The AD7667 operates from a single 5 V supply. In Impulse mode, its power dissipation decreases with throughput. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangement is compatible with both 3 V and 5 V logic. APPLICATIONS Data Acquisition Instrumentation Digital Signal Processing Spectrum Analysis Medical Instruments Battery-Powered Systems Process Control

The AD7683 is a 16-bit, charge redistribution, successive approximation, PulSAR? analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.7 V and 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes (B grade), an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CS falling 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 up to the supply voltage. Its power scales linearly with throughput.The AD7683 is housed in an 8-lead MSOP or an 8-lead QFN (LFCSP) package, with an operating temperature specified from ?40?C to +85?C.APPLICATIONS Battery-powered equipment Data acquisition Instrumentation Medical instruments Process control

The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge redistribution successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a single power supply, VDD.The AD7682/AD7689 contain all components for use in a multichannel, low power data acquisition system, including a true 16-bit SAR ADC with no missing codes; a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer that is useful for configuring the inputs as single-ended (with or without ground sense), differential, or bipolar; an internal low drift reference (selectable 2.5 V or 4.096 V) and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order.The AD7682/AD7689 use a simple serial port interface (SPI) for?writing to the configuration register and receiving conversion?results. The SPI interface uses a separate supply, VIO, which is set?to the host logic level. Power dissipation scales with throughput.The AD7682/AD7689 are housed in a tiny 20-lead lead frame?chip scale package (LFCSP) and 20-lead wafer level chip scale?package (WLCSP) with operation specified from ?40?C to?+85?C. The AD7689 includes an extended temperature range?model with specifications guaranteed to a maximum?temperature (TMAX) of +125?C.APPLICATIONS Multichannel system monitoring Battery-powered equipment Medical instruments: ECG/EKG Mobile communications: GPS Power line monitoring Data acquisition Seismic data acquisition systems Instrumentation Process control

The AD7693 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 with no missing codes, an internal conversion clock, and a versatile serial interface port. The reference voltage, VREF, is applied externally and can be set up to the supply voltage, VDD. On the CNV rising edge, it samples the voltage difference between the IN+ and IN? pins. The voltages on these pins swing in opposite phase between 0 V and VREF about VREF/2. Its power scales linearly with throughput.Using the SDI input, the SPI-compatible serial interface also features the ability 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 VIO supply.The AD7693 is housed in a 10-lead MSOP with operation specified from ?40?C to +85?C.APPLICATIONS Battery-powered equipment Data acquisitions Seismic data acquisition systems DVMs Instrumentation Medical instruments

The AD7719 is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port and temperature sensor. The 24-bit mainchannel with PGA accepts fully differential, unipolar and bipolar input signal ranges from REFIN1/128 to REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit aux channel does not have a PGA and has an input signal range of REFIN2 or REFIN2/2.

The AD7730 is a complete analog front end for weigh-scale and pressure measurement applications. The device accepts low-level signals directly from a transducer and outputs a serial digital word. The input signal is applied to a proprietary programmable gain front end based around an analog modulator.The modulator output is processed by a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling time.The part features two buffered differential programmable gain analog inputs as well as a differential reference input. The part operates from a single +5 V supply. It accepts four unipolar analog input ranges: 0 mV to ?10 mV, +20 mV, +40 mV and +80 mV and four bipolar ranges: ?10 mV, ?20 mV, ?40 mV and ?80 mV. The peak-to-peak resolution achievable directly from the part is 1 in 230,000 counts. An on-chip 6-bit DAC allows the removal of TARE voltages. Clock signals for synchronizing ac excitation of the bridge are also provided.The serial interface on the part can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. The AD7730 contains self-calibration and system calibration options, and features an offset drift of less than 5 nV/?C and a gain drift of less than 2 ppm/?C.The part is available in a 24-pin plastic DIP, a 24-lead SOIC and 24-lead TSSOP package.APPLICATIONS Weigh Scales Pressure Measurement

The AD7761 is an 8-channel, simultaneous sampling sigma-delta (?-?) analog-to-digital converter (ADC) with a ?-? modulator and digital filter per channel, enabling synchronized sampling of ac and dc signals.The AD7761 achieves 97.7 dB dynamic range at a maximum input bandwidth of 110.8 kHz, combined with typical performance of ?1 LSB integral nonlinearity (INL), ?1 LSB offset error, and ?5 LSB gain error.The AD7761 user can trade off input bandwidth, output data rate, and power dissipation. Select one of three power modes to optimize the device for noise targets and power consumption. The flexibility of the AD7761 allows it to become a reusable platform for low power dc and high performance ac measurement modules.The AD7761 has three modes: fast mode (256 kSPS maximum, 110.8 kHz input bandwidth, 51.5 mW per channel), median mode (128 kSPS maximum, 55.4 kHz input bandwidth, 27.5 mW per channel) and low power mode (32 kSPS maximum, 13.8 kHz input bandwidth, 9.375 mW per channel).The AD7761 offers extensive digital filtering capabilities, such as a wideband, low ?0.005 dB pass-band ripple, antialiasing low-pass filter with sharp roll-off, and 105 dB attenuation at the Nyquist frequency.Frequency domain measurements can use the wideband linear phase filter. This filter has a flat pass band (?0.005 dB ripple) from dc to 102.4 kHz at 256 kSPS, from dc to 51.2 kHz at 128 kSPS, or from dc to 12.8 kHz at 32 kSPS.The AD7761 also offers sinc response via a sinc5 filter, a low latency path for low bandwidth, and low noise measurements.The wideband and sinc5 filters can be selected and run on a per channel basis.Within these filter options, the user can improve the dynamic range by selecting from decimation rates of ?32, ?64, ?128, ?256, ?512, and ?1024. The ability to vary the decimation filtering optimizes noise performance to the required input bandwidth.Embedded analog functionality on each ADC channel makes design easier, such as a precharge buffer on each analog input that reduces analog input current and a precharge reference buffer per channel reduces input current and glitches on the reference input terminals.The device operates with a 5 V AVDD1A and AVDD1B supply, a 2.25 V to 5.0 V AVDD2A and AVDD2B supply, and a 2.5 V to 3.3 V or 1.8 V IOVDD supply (see the 1.8 V IOVDD Operation section for specific requirements for operating at 1.8 V IOVDD).The device requires an external reference; the absolute input reference voltage range is 1 V to AVDD1 ? AVSS.For the purposes of clarity within this data sheet, the AVDD1A and AVDD1B supplies are referred to as AVDD1 and the AVDD2A and AVDD2B supplies are referred to as AVDD2. For the negative supplies, AVSS refers to the AVSS1A, AVSS1B, AVSS2A, AVSS2B, and AVSS pins.The specified operating temperature range is ?40?C to +105?C. The device is housed in a 10 mm ? 10 mm 64-lead LQFP package with a 12 mm ? 12 mm printed circuit board (PCB) footprint.Throughout this data sheet, multifunction pins, such as XTAL2/MCLK, are referred to either by the entire pin name or by a single function of the pin, for example MCLK, when only that function is relevant.Applications Data acquisition systems: USB/PXI/Ethernet Instrumentation and industrial control loops Audio testing and measurement Vibration and asset condition monitoring 3-phase power quality analysis Sonar High precision medical electroencephalogram (EEG)/ electromyography (EMG)/electrocardiogram (ECG)

The AD7767/AD7767-1/AD7767-2 are high performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). The AD7767/AD7767-1/AD7767-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, and are contained in a 16-lead TSSOP package.Ideal for ultralow power data acquisition (such as PCI- and USB-based systems), the AD7767/AD7767-1/AD7767-2 provide 24-bit resolution. The combination of exceptional SNR, wide dynamic range, and outstanding dc accuracy make the AD7767/AD7767-1/AD7767-2 ideally suited for measuring small signal changes over a wide dynamic range. This is particularly suitable for applications where small changes on the input are measured on larger ac or dc signals. In such an application, the AD7767/AD7767-1/AD7767-2 accurately gather both ac and dc information.The AD7767/AD7767-1/AD7767-2 include an on-board digital filter (complete with linear phase response) that acts to elimi-nate out-of-band noise by filtering the oversampled input voltage. The oversampled architecture also reduces front-end antialias requirements. Other features of the AD7767 include a SYNC/PD (synchronization/power-down) pin, allowing the synchronization of multiple AD7767 devices. The addition of an SDI pin provides the option of daisy chaining multiple AD7767 devices.The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply using a 5 V reference. The devices operate from ?40?C to +105?C.ApplicationsLow power PCI/USB data acquisition systems Low power wireless acquisition systems Vibration analysis Instrumentation High precision medical acquisition

The AD7770 is an 8-channel, simultaneous sampling ADC. Eightfull sigma-delta (?-?) ADCs are on chip. The AD7770 providesa low input current to allow direct sensor connection. Each inputchannel has a programmable gain stage allowing gains of 1, 2, 4,and 8 to map lower amplitude sensor outputs into the full-scaleADC input range, maximizing the dynamic range of the signalchain. The AD7770 accepts a VREF voltage from 1 V up to 3.6 V.The analog inputs accept unipolar (0 V to VREF) or true bipolar(?VREF/2) analog input signals with 3.3 V or ?1.65 V analogsupply voltages, respectively for PGAGAIN = 1. The analog inputscan be configured to accept true differential, pseudo differential,or single-ended signals to match different sensor outputconfigurations.Each channel contains a PGA, an ADC modulator and asinc3, low latency digital filter. An SRC is provided to allow fineresolution control over the AD7770 ODR. This control can beused in applications where the ODR resolution is required tomaintain coherency with 0.01 Hz changes in the line frequency.The SRC is programmable through the serial port interface (SPI).The AD7770 implements two different interfaces: a data outputinterface and SPI control interface. The ADC data output interfaceis dedicated to transmitting the ADC conversion results fromthe AD7770 to the processor. The SPI writes to and reads fromthe AD7770 configuration registers and for the control andreading of data from the SAR ADC. The SPI can also beconfigured to output the ?-? conversion data.The AD7770 includes a 12-bit SAR ADC. This ADC can beused for AD7770 diagnostics without having to decommissionone of the ?-? ADC channels dedicated to system measurementfunctions. With the use of an external multiplexer, which can becontrolled through the three general-purpose input/output pins(GPIOs), and signal conditioning, the SAR ADC can validatethe ?-? ADC measurements in applications where functionalsafety is required. In addition, the AD7770 SAR ADC includesan internal multiplexer to sense internal nodes.The AD7770 contains a 2.5 V reference and reference buffer. Thereference has a typical temperature coefficient of 10 ppm/?C.The AD7770 offers two modes of operation: high resolution modeand low power mode. High resolution mode provides a higherdynamic range while consuming 10.75 mW per channel; lowpower mode consumes just 3.37 mW per channel at a reduceddynamic range specification.The specified operating temperature range is ?40?C to +105?C,although the device is operational up to +125?C.Applications Protection relays General-purpose data acquisition Industrial process control

The AD7779 is an 8-channel, simultaneous sampling ADC.There are eight full ?-? ADCs on chip. The AD7779 providesan ultralow input current to allow direct sensor connection. Eachinput channel has a programmable gain stage allowing gains of1, 2, 4, and 8 to map lower amplitude sensor outputs into thefull-scale ADC input range, maximizing the dynamic range ofthe signal chain. The AD7779 accepts VREF from 1 V up to 3.6 V.The analog inputs accept unipolar (0 V to VREF/GAIN) or truebipolar (?VREF/GAIN/2 V) analog input signals with 3.3 V or?1.65 V analog supply voltages. The analog inputs can beconfigured to accept true differential, pseudo differential, or singleendedsignals to match different sensor output configurations.Each channel contains an ADC modulator and a sinc3, lowlatency digital filter. An SRC is provided to allow fine resolutioncontrol over the AD7779 ODR. This control can be used inapplications where the ODR resolution is required to maintaincoherency with 0.01 Hz changes in the line frequency. The SRCis programmable through the serial port interface (SPI). TheAD7779 implements two different interfaces: a data outputinterface and SPI control interface. The ADC data outputinterface is dedicated to transmitting the ADC conversionresults from the AD7779 to the processor. The SPI interfaceis used to write to and read from the AD7779 configurationregisters and for the control and reading of data from the SARADC. The SPI interface can also be configured to output the?-? conversion data.The AD7779 includes a 12-bit SAR ADC. This ADC can be usedfor AD7779 diagnostics without having to decommission one ofthe ?-? ADC channels dedicated to system measurement functions.With the use of an external multiplexer, which can becontrolled through the three general-purpose inputs/outputs pins(GPIOs), and signal conditioning, the SAR ADC can be used tovalidate the ?-? ADC measurements in applications wherefunctional safety is required. In addition, the AD7779 SAR ADCincludes an internal multiplexer to sense internal nodes.The AD7779 contains a 2.5 V reference and reference buffer.The reference has a typical temperature coefficient of 10 ppm/?C.The AD7779 offers two modes of operation: high resolutionmode and low power mode. High resolution mode provides ahigher dynamic range while consuming 10.75 mW per channel;low power mode consumes just 3.37 mW per channel at areduced dynamic range specification.The specified operating temperature range is ?40?C to +105?C,although the device is operational up to +125?C.Applications Circuit breakers General-purpose data acquisition Electroencephalography (EEG) Industrial process control