The AD8641/AD8642/AD8643 are low power, precision JFET input amplifiers featuring extremely low input bias current and rail-to-rail output. The ability to swing nearly rail-to-rail at the input and rail-to-rail at the output enables designers to buffer CMOS DACs, ASICs, and other wide output swing devices in single-supply systems. The outputs remain stable with capacitive loads of more than 500 pF.The AD8641/AD8642/AD8643 are suitable for applications utilizing multichannel boards that require low power to manage heat. Other applications include photodiodes, ATE reference level drivers, battery management, and industrial controls.The AD8641/AD8642/AD8643 are fully specified over the extended industrial temperature range of –40°C to +125°C. The AD8641 is available in 5-lead SC70 and 8-lead SOIC lead-free packages. The AD8642 is available in 8-lead MSOP and 8-lead SOIC lead-free packages. The AD8643 is available in 14-lead SOIC and 16-lead, 3 mm × 3 mm, LFCSP lead-free packages.ApplicationsLine-/battery-powered instrumentsPhotodiode amplifiersPrecision current sensingMedical instrumentationIndustrial controlsPrecision filtersPortable audioATE

The AD8671/AD8672/AD8674 are very high precision amplifiers featuring very low noise, very low offset voltage and drift, low input bias current, 10 MHz bandwidth, and low power consumption. Outputs are stable with capacitive loads of over 1000 pF. Supply current is less than 3 mA per amplifier at 30 V.The AD8671/AD8672/AD8674’s combination of ultralow noise, high precision, speed, and stability is unmatched. The MSOP version of the AD8671/AD8672 requires only half the board space of comparable amplifiers.Applications for these amplifiers include high quality PLL filters, precision filters, medical and analytical instrumentation, precision power supply controls, ATE, data acquisition, and precision controls as well as professional quality audio.The AD8671/AD8672 are specified over the extended industrial temperature range (−40°C to +125°C), and the AD8674 is specified over the industrial temperature range (−40°C to +85°C).The AD8671/AD8672 are available in the 8-lead SOIC and 8-lead MSOP packages. The AD8674 is available in 14-lead SOIC and 14-lead TSSOP packages.Surface-mount devices in MSOP packages are available in tape and reel only.APPLICATIONSPLL filtersFilters for GPSInstrumentationSensors and controlsProfessional quality audio

The ADCMP370 / ADCMP371 are general purpose comparators with input offset voltages of 6mV (max). High performance over the -40°C to +85°C temperature range make them suitable for use in automotive and other thermally harsh applications, while low power consumption and space efficientSC70 packaging make them ideal for battery powered portable equipment.The ADCMP371 has a push-pull output stage, while theADCMP370 has an open-drain output. The inputs on bothparts and the output on the ADCMP370 can tolerate voltagesup to 22 V, making them suitable for use as voltage detectors inportable equipment. The devices are available in space-efficient, 5-lead SC70packaging.APPLICATIONS Voltage Detectors Battery Management Systems A/D Converters Low Voltage Applications Battery Powered Electronics Portable Equipment

The AD822 is a dual precision, low power FET input op ampthat can operate from a single supply of 5 V to 30 V or dual supplies of ±2.5 V to ±15 V. It has true single-supply capability with an input voltage range extending below the negative rail, allowing the AD822 to accommodate input signals belowground in the single-supply mode. Output voltage swing extends to within 10 mV of each rail, providing the maximumoutput dynamic range.Offset voltage of 800 μV maximum, offset voltage drift of 2 μV/°C, input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to a gigaohm. The 1.8 MHz unity-gain bandwidth, –93 dB THD at 10 kHz,and 3 V/μs slew rate are provided with a low supply current of 800 μA per amplifier.Applications Battery-powered precision instrumentation Photodiode preamps Active filters 12-bit to 14-bit data acquisition systems Medical instrumentation Low power references and regulatorsThe AD822-EP supports defense and aerospace applications (AQEC standard)

The AD8500 is a low power, precision CMOS op amp featuring a maximum supply current of 1 μA. The AD8500 has a maximum offset voltage of 1 mV and a typical input bias current of 1 pA, and it operates rail-to-rail on both the input and output. The AD8500 can operate from a single-supply voltage of +1.8 V to +5.5 V or a dual-supply voltage of ±0.9 V to ±2.75 V.With its low power consumption, low input bias current, and rail-to-rail input and output, the AD8500 is ideally suited for a variety of battery-powered portable applications. Potential applications include ECGs, pulse monitors, glucose meters, smoke and fire detectors, vibration monitors, and backup battery sensors.The ability to swing rail-to-rail at both the input and output helps maximize dynamic range and signal-to-noise ratio in systems that operate at very low voltages. The low offset voltage allows the AD8500 to be used in systems with high gain without having excessively large output offset errors, and it provides high accuracy without the need for system calibration.The AD8500 is fully specified over the industrial temperature range (−40°C to +85°C) and is operational over the extended industrial temperature range (−40°C to +125°C). It is available in a 5-lead, SC70 surface-mount package.ApplicationsPortable EquipmentRemote SensorsLow Power FiltersThreshold DetectorsCurrent Sensing

The AD8553 is a precision instrumentation amplifierfeaturing low noise, rail-to-rail output and a power-savingshutdown mode. The AD8553 also features low offset anddrift coupled with high common mode rejection. Inshutdown mode, the total supply current is reduced to lessthan 4 µA. Operation is fully specified from +1.8V to+5.5V.With low offset voltage of 20µV, offset voltage drift of0.1µV/°C and voltage noise of only 0.7µV p-p (0.01Hz to10 Hz), the AD8553 is ideal for applications where errorsources cannot be tolerated. Precision instrumentation,position and pressure sensors, medical instrumentation,and strain gauge amplifiers benefit from the low noise, lowinput bias current, and high common mode rejection. Thesmall footprint and low cost are ideal for high volumeapplications.The small package and low power consumption allowmaximum channel density or minimum board size forspace-critical equipment and portable systems.The AD8553 is specified over the industrial temperaturerange from -40°C to +85°C. The AD8553 is available inthe lead-free 10-lead MSOP.

The ADA4841-2 is a unity gain stable, low noiseand distortion, rail-to-rail output amplifier that has a quiescentcurrent of 1.5 mA maximum. In spite of its low powerconsumption, this amplifier offers low wideband voltagenoise performance of 2.1 nV/√Hz and 1.4 pA/√Hz current noise,along with excellent spurious-free dynamic range (SFDR) of−105 dBc at 100 kHz. To maintain a low noise environment atlower frequencies, the amplifier has low 1/f noise of 7 nV/√Hzand 13 pA/√Hz at 10 Hz.The ADA4841-2 output can swing to less than50 mV of either rail. The input common-mode voltage rangeextends down to the negative supply. The ADA4841-2 can drive up to 10 pF of capacitive load withminimal peaking.The ADA4841-2 provides the performance requiredto efficiently support emerging 16-bit to 18-bit ADCs and is ideal for portable instrumentation, high channel count, industrialmeasurement, and medical applications. The ADA4841-1 is ideally suited to drive the AD7685/AD7686,16-bit PulSAR ADCs.The ADA4841-2 package features RoHS compliantlead finishes. The amplifier is rated to work over theindustrial temperature range (−40°C to +125°C).Applications Low power, low noise signal processing Battery-powered instrumentation 16-bit PulSAR® ADC drivers

The LTC2442 is an ultra high precision, variable speed, 24-bit ΔΣ™ ADC with integrated amplifier. The amplifier can be configured as a buffer for easy input drive of high impedance sensors. 1 part-per-million (ppm) linearity is achievable when the amplifier is configured in unity gain. External resistors can be used to set a gain for increased resolution of low level input signals. The positive and negative amplifier supply pins may be tied directly to VCC (4.5V to 5.5V) and GND or biased above VCC and below GND for rail-to-rail input signals.The proprietary ΔΣ architecture ensures stable DC accuracy through continuous transparent calibration. Ten speed/resolution combinations from 6.9Hz/220nVRMS to 3.5kHz/25µVRMS can be selected with no latency or shift in DC accuracy. Additionally, a 2X speed mode can be selected enabling output rates up to 7kHz (8kHz with an external oscillator) with one cycle latency.Any combination of single-ended (up to 4 inputs) or differential (up to 2 inputs) can be selected with a common mode input range from ground to VCC. While operating in the 1X speed mode the first conversion following a new speed/resolution or channel selection is valid.Applications Auto Ranging 6-Digit DVMs High Speed Multiplexing Weight Scales Direct Temperature Measurement High Speed Data Acquisition

The AD548 is a low power, precision monolithic operational amplifier. It offers both low bias current (10 pA max, warmed up) and low quiescent current (200 μA max) and is fabricated with ion-implanted FET and laser wafer trimming technologies. Input bias current is guaranteed over the AD548’s entire common-mode voltage range.The economical J grade has a maximum guaranteed input offset voltage of less than 2 mV and an input offset voltage drift of less than 20 μV/°C. This level of dc precision is achieved utilizing Analog’s laser wafer drift trimming process. The combination of low quiescent current and low offset voltage drift minimizes changes in input offset voltage due to self-heating effects.The AD548 is recommended for any dual supply op amp application requiring low power and excellent dc and ac performance. In applications such as battery-powered, precision instrument front ends and CMOS DAC buffers, the AD548’s excellent combination of low input offset voltage and drift, low bias current, and low 1/f noise reduces output errors. High common-mode rejection (82 dB, min on the “B” grade) and high open-loop gain ensures better than 12-bit linearity in high impedance, buffer applications.The AD548 is pinned out in a standard op amp configuration and is available in three performance grades. The AD548J and AD548K are rated over the commercial temperature range of 0°C to 70°C. The AD548B is rated over the industrial temperature range of –40°C to +85°C.The AD548 is available in an 8-lead plastic mini-DIP and surface-mount (SOIC) packages.PRODUCT HIGHLIGHTS A combination of low supply current, excellent dc and ac performance and low drift makes the AD548 the ideal op amp for high performance, low power applications. The AD548 is pin compatible with industry standard op amps such as the LF441, TL061, and AD542, enabling designers to improve performance while achieving a reduction in power dissipation of up to 85%. Guaranteed low input offset voltage (2 mV max) and drift (20 µV/°C max) for the AD548J are achieved utilizing Analog Devices’ laser drift trimming technology, eliminating the need for external trimming. Analog Devices specifies each device in the warmed-up condition, insuring that the device will meet its published specifications in actual use. A dual version, the AD648, is also available. Enhanced replacement for LF441 and TL061.

The AD684 is a monolithic quad sample-and-hold amplifier (SHA). It features four complete sampling channels, each controlled by an independent hold command. Each SHA is complete with an internal hold capacitor. The high accuracy SHA channels are self-contained and require no external components or adjustments. The AD684 is manufactured on a BiMOS process which provides a merger of high performance bipolar circuitry and low power CMOS logic.The AD684 is ideal for high performance, multichannel data acquisition systems. Each SHA channel can acquire a signal in less than 1 µs and retain the held value with a droop rate of less than 0.01 µV/µs. Excellent linearity and ac performance make the AD684 an ideal front end for high speed 12- and 14-bit ADCs.The AD684 has a self-correcting architecture that minimizes hold mode errors and insures accuracy over temperature. Each channel of the AD684 is capable of sourcing 5 mA and incorporates output short circuit protection.The AD684 is specified for three temperature ranges. The J grade device is specified for operation from 0 to +70°C, the A grade from -40°C to +85°C and the S grade from -55°C to +125°C.