The AD7476 / AD7477 / AD7478 are, respectively, 12-bit, 10-bit, and 8-bit, high speed, low power, successive approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. Each part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 MHz.The conversion process and data acquisition are controlled using CS the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is initiated at this point. There are no pipeline delays associated with these parts.The AD7476 / AD7477 / AD7478 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the parts is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus, the analog input range for the parts are 0 V to VDD. The conversion rate is determined by the SCLK.PRODUCT HIGHLIGHTS First 12-/10-/8-Bit ADCs in SOT-23 Packages. High Throughput with Low Power Consumption. Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. This allows the average power consumption to be reduced while not converting. The parts also feature a shutdown mode to maximize power efficiency at lower throughput rates. Current consumption is 1 μA maximum when in shutdown mode. Reference Derived from the Power Supply. No Pipeline Delay. The parts feature a standard successive-approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control.APPLICATIONS Battery-powered systems Personal digital assistants Medical instruments Mobile communications Instrumentation and control systems Data acquisition systems High speed modems Optical sensors

The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp) and a fast mode (Normal) for asynchronous conversion rate applications.The AD7641 is hardware factory calibrated and comprehensively tested to ensure ac parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) in addition to the more traditional dc parameters of gain, offset and linearity. Operation is specified from −40°C to +85°C.PRODUCT HIGHLIGHTS Fast Throughput. The AD7641 is a 2 MSPS, charge redistribution, 18-bit SAR ADC. Superior Linearity. The AD7641 has no missing 18-bit code. Internal Reference. The AD7641 has a 2.048 V internal reference with a typical drift of ±10 ppm/°C and an on-chip TEMP sensor. Single-Supply Operation. The AD7641 operates from a 2.5 V single supply. Serial or Parallel Interface. Versatile parallel (16- or 8-bit bus) or 2-wire serial interface arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.APPLICATIONS Medical instruments High dynamic data acquisition Instrumentation Spectrum analysis ATE

The AD7705 / AD7706 are complete analog front ends for low frequency measurement applications. These 2-/3-channel devices can accept low level input signals directly from a transducer and produce serial digital output. The devices employ a Σ-Δ conversion technique to realize up to 16 bits of no missing codes performance. The selected input signal is applied to a proprietary, programmable-gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via an on-chip control register, allowing adjustment of the filter cutoff and output update rate. The AD7705 / AD7706 devices operate from a single 2.7 V to 3.3 V or 4.75 V to 5.25 V supply. The AD7705 features two fully differential analog input channels; the AD7706 features three pseudo differential input channels. Both devices feature a differential reference input. Input signal ranges of 0 mV to 20 mV through 0 V to 2.5 V can be incorporated on both devices when operating with a VDD of 5 V and a reference of 2.5 V. They can also handle bipolar input signal ranges of ±20 mV through ±2.5 V, which are referenced to the AIN(−) inputs on the AD7705 and to the COMMON input on the AD7706.The AD7705 / AD7706 devices, with a 3 V supply and a 1.225 V reference, can handle unipolar input signal ranges of 0 mV to 10 mV through 0 V to 1.225 V. The devices can accept bipolar input ranges of ±10 mV through ±1.225 V. Therefore, the AD7705 / AD7706 devices perform all signal conditioning and conversion for a 2-channel or 3-channel system. The AD7705 / AD7706 are ideal for use in smart, microcontroller, or DSP-based systems. The devices feature a serial interface that can be configured for 3-wire operation. Gain settings, signal polarity, and update rate selection can be configured in software using the input serial port. The parts contains self-calibration and system calibration options to eliminate gain and offset errors on the part itself or in the system. CMOS construction ensures very low power dissipation, and the power-down mode reduces the standby power consumption to 20 μW typ. These parts are available in a 16-lead, wide body (0.3 inch), plastic dual in-line package (DIP); a 16-lead, wide body (0.3 inch), standard small outline (SOIC) package; and a low profile, 16-lead, thin shrink small outline package (TSSOP).

The AD7741/AD7742 are a new generation of synchronous voltage-to-frequency converters (VFCs). The AD7741 is a single-channel version in an 8-lead package (SOIC/DIP) and the AD7742 is a multichannel version in a 16-lead package (SOIC/DIP). No user trimming is required to achieve the specified performance.The AD7741 has a single buffered input whereas the AD7742 has four buffered inputs that may be configured as two fully-differential inputs or three pseudo-differential inputs. Both parts include an on-chip +2.5 V bandgap reference that provides the user with the option of using this internal reference or an external reference.The AD7741 has a single-ended voltage input range from 0 V to REFIN. The AD7742 has a differential voltage input range from –VREF to +VREF. Both parts operate from a single +5 V supply consuming typically 6 mA, and also contain a power down feature that reduces the current consumption to less than 35 μA.Applications Low Cost Analog-to-Digital Conversion Signal Isolation AD7742 is obsolete

The ADE7754 is the electricity industry's first digitally calibrated, multi-function energy measurement IC programmable for all types of 3-phase grid configurations. This single chip solution measures active and apparent energy and provides a serial port interface and a pulse output. The ADE7754 transducer interface uses three fully differential current inputs and three single-ended voltage inputs. The six ADC’s digitize the signals so that all signal processing is done in the digital domain for superior stability and accuracy. The ADE7754 includes reference circuitry, temperature sensor, and all the signal processing required to perform active and apparent energy measurement as well as RMS calculation on all current and voltage channels. Additional power quality measurements are included.The ADE7754 surpasses the IEC61036/60687 accuracy requirements and provides an SPI interface for digital calibration and reading register data.The ADE7754 is available in 24-lead SOIC package.NOTE: If your application requires the measurement of reactive energy and information per phase, the ADE7758 is recommended.

The ADE7757 is an accurate electrical energy measurement integrated circuit. It is a pin reduction version of ADE7755 with an enhancement of a precise oscillator circuit that serves as a clock source to the chip. The ADE7757 eliminates the cost of an external crystal or resonator, thus reducing the overall cost of a meter built with this IC. The chip directly interfaces with shunt resistor.The ADE7757 provides instantaneous and average real power based on line current and voltage. The part specifications surpass the accuracy requirements as quoted in the IEC61036 standard. The only analog circuitry used in the ADE7757 is in the ADCs and reference circuit. All other signal processing (e.g., multiplication and filtering) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time.The small analog input full-scale allows the chip to interface to low value shunt resistances without losing dynamic range. The ADE7757 is available in 16-lead SOIC narrow-body package.The Application Note AN-679 can be used as a basis for a description of an IEC61036 low cost, watt-hour meter reference design.NOTE: For polyphase system designs, the ADE7752A is recommended.

The ADF4001 frequency synthesizer can be used to implement clock sources for PLLs that require very low noise, stable reference signals. It consists of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, and a programmable 13-bit N counter. In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizer is used with an external loop filter and VCO (Voltage Controlled Oscillator) or VCXO (Voltage Controlled Crystal Oscillator). The N min value of 1 allows flexibility in clock generation. 

The ADF4001 frequency synthesizer can be used to implement clock sources for PLLs that require very low noise, stable reference signals. It consists of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, and a programmable 13-bit N counter. In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizer is used with an external loop filter and VCO (Voltage Controlled Oscillator) or VCXO (Voltage Controlled Crystal Oscillator). The N min value of 1 allows flexibility in clock generation. 

The ADF4110 family of frequency synthesizers can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. They consist of low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, programmable A and B counters and a dual modulus prescaler (P/P+1). The A (6-bit) and B (13-bit) counters, in conjunction with the dual modulus prescaler (P/P+1), implement an N divider (N = BP+A). In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizer is used with an external loop filter and VCO (Voltage Controlled Oscillator).Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a power supply ranging from 2.7 V to 5.5 V and can be powered down when not in use.

The ADG1204 is a complementary metal-oxide semiconductor(CMOS) analog multiplexer, comprising four single channelsdesigned on an iCMOS (industrial CMOS) process. iCMOS® is amodular manufacturing process that combines high voltage CMOSand bipolar technologies. It enables the development of a widerange of high performance analog ICs capable of 33 V operationin a footprint that no previous generation of high voltage deviceshas been able to achieve. Unlike analog ICs using conventionalCMOS processes, iCMOS components can tolerate high supplyvoltages while providing increased performance, dramaticallylower power consumption, and reduced package size.The ultralow capacitance and charge injection of this multiplexermakes it an ideal solution for data acquisition and sample-andholdapplications, where low glitch and fast settling are required.Fast switching speed coupled with high signal bandwidth makesthe device suitable for video signal switching. iCMOS constructionensures ultralow power dissipation, making the device ideallysuited for portable and battery-powered instruments.The ADG1204 switches one of four inputs to a common output, D,as determined by the 3-bit binary address lines: A0, A1, and EN.Logic 0 on the EN pin disables the device. Each switch conductsequally well in both directions when on and has an input signalrange that extends to the supplies. In the off condition, signallevels up to the supplies are blocked. All switches exhibit break-before-makeswitching action.Product Highlights 1. 1.5 pF off capacitance (±15 V supply). <1 pC charge injection. 3 V logic-compatible digital inputs: VIH = 2.0 V, VIL = 0.8 V. No VL logic power supply required. Ultralow power dissipation: <0.03 μW. 14-lead TSSOP and 12-lead, 3 mm × 3 mm LFCSP packages.Applications Automatic test equipment Data acquisition systems Battery-powered systems Sample-and-hold systems Audio signal routing Video signal routing Communication systems