The AD8221 is a gain programmable, high performance instrumentation amplifier that delivers the industry’s highest CMRR over frequency in its class. The CMRR of instrumentation amplifiers on the market today falls off at 200 Hz. In contrast, the AD8221 maintains a minimum CMRR of 80 dB to 10 kHz for all grades at G = 1. High CMRR over frequency allows the AD8221 to reject wideband interference and line harmonics, greatly simplifying filter requirements. Possible applications include precision data acquisition, biomedical analysis, and aerospace instrumentation. Low voltage offset, low offset drift, low gain drift, high gain accuracy, and high CMRR make this part an excellent choice in applications that demand the best dc performance possible, such as bridge signal conditioning. Programmable gain affords the user design flexibility. A single resistor sets the gain from 1 to 1000. The AD8221 operates on both single and dual supplies and is well suited for applications where ±10 V input voltages are encountered. The AD8221 is available in a low cost 8-lead SOIC and 8-lead MSOP, both of which offer the industry’s best performance. The MSOP requires half the board space of the SOIC, making it ideal for multichannel or space-constrained applications. Performance is specified over the entire industrial temperature range of −40°C to +85°C for all grades. Furthermore, the AD8221 is operational from −40°C to +125°C*. ApplicationsWeigh scales Industrial process controls Bridge amplifiers Precision data acquisition systems Medical instrumentation Strain gages Transducer interfaces

The AD8226 is a low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain between 1 and 1000.The AD8226 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the signal to make full use of the supply rails. Because the input range also includes the ability to go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8226 operates on supplies ranging from ±1.35 V to ±18 V for dual supplies and 2.2 V to 36 V for single supply.The robust AD8226 inputs are designed to connect to real-world sensors. In addition to its wide operating range, the AD8226 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open wire detection.The AD8226 is perfect for multichannel, space-constrained industrial applications. Unlike other low cost, low power instrumentation amplifiers, the AD8226 is designed with a minimum gain of 1 and can easily handle ±10 V signals. With its MSOP package and 125°C temperature rating, the AD8226 thrives in tightly packed, zero airflow designs.The AD8226 is available in 8-lead MSOP and SOIC packages, and is fully specified for −40°C to +125°C operation.For a device with a similar package and performance as the AD8226 but with gain settable from 5 to 1000, consider using the AD8227.ApplicationsIndustrial process controlsBridge amplifiersMedical instrumentationPortable data acquisitionMultichannel systems

The AD8228 is a high performance instrumentation amplifier with very high gain accuracy. Because all gain setting resistors are internal and laser trimmed, gain accuracy and gain drift are better than can be achieved with typical instrumentation amplifiers.Low voltage offset, low offset drift, low gain drift, high gain accuracy, and high CMRR make this part an excellent choice in applications that demand the best dc performance possible, such as bridge signal conditioning.The AD8228 operates on both single and dual supplies. Because the part can operate on supplies up to ±18 V, it is well suited for applications where high common-mode input voltages are encountered. The AD8228 is available in 8-lead MSOP and SOIC packages.Performance is specified over the entire industrial temperature range of −40°C to +85°C for all grades. Furthermore, the AD8228 is operational from −40°C to +125°C. For a pin-compatible amplifier with similar specifications, but with a gain range of 1 to 1000, see the AD8221.ApplicationsWeigh scalesIndustrial process controlsBridge amplifiersPrecision data acquisition systemsMedical instrumentationStrain gagesTransducer interfacesData Sheet, Rev 0, 08/2008

The AD8228 is a high performance instrumentation amplifier with very high gain accuracy. Because all gain setting resistors are internal and laser trimmed, gain accuracy and gain drift are better than can be achieved with typical instrumentation amplifiers.Low voltage offset, low offset drift, low gain drift, high gain accuracy, and high CMRR make this part an excellent choice in applications that demand the best dc performance possible, such as bridge signal conditioning.The AD8228 operates on both single and dual supplies. Because the part can operate on supplies up to ±18 V, it is well suited for applications where high common-mode input voltages are encountered. The AD8228 is available in 8-lead MSOP and SOIC packages.Performance is specified over the entire industrial temperature range of −40°C to +85°C for all grades. Furthermore, the AD8228 is operational from −40°C to +125°C. For a pin-compatible amplifier with similar specifications, but with a gain range of 1 to 1000, see the AD8221.ApplicationsWeigh scalesIndustrial process controlsBridge amplifiersPrecision data acquisition systemsMedical instrumentationStrain gagesTransducer interfacesData Sheet, Rev 0, 08/2008

The AD8275 is a G=0.2 difference amplifier that can be used totranslate +/-10V signals to a +4V level. It solves the problemtypically encountered in industrial and instrumentation where+/-10V signals must be interfaced to a single supply 4V or 5VADC. The AD8275 interfaces the two signal levels, simplifyingdesign.The AD8275 has fast settling time of 450 ns and low distortion,making it suitable for driving medium speed successive approximation(SAR) ADCs. Its wide input voltage range and rail-torailoutputs make it an easy to use building block. Single-supplyoperation reduces the power consumption of the amplifier andhelps to protect the ADC from overdrive conditions. Internal, matched, precision laser-trimmed resistors ensurelow gain error, low gain drift of 1 ppm/°C (maximum), andhigh common-mode rejection of 80 dB. Low offset and lowoffset drift, combined with its fast settling time, make theAD8275 suitable for a variety of data acquisition applicationswhere accurate and quick capture is required. The AD8275 can be used as an analog front end, or it can followbuffers to level translate high voltages to a voltage range acceptedby the ADC. In addition, the AD8275 can be configured fordifferential outputs if used with a differential ADC. The AD8275 is available in a space-saving, 8-lead MSOP and is specified for performance over the −40°C to +85°C temperature range.ApplicationsLevel TranslatorADC DriverInstrumentation Amplifier Building BlockAutomated test equipment

The AD8275 is a G=0.2 difference amplifier that can be used totranslate +/-10V signals to a +4V level. It solves the problemtypically encountered in industrial and instrumentation where+/-10V signals must be interfaced to a single supply 4V or 5VADC. The AD8275 interfaces the two signal levels, simplifyingdesign.The AD8275 has fast settling time of 450 ns and low distortion,making it suitable for driving medium speed successive approximation(SAR) ADCs. Its wide input voltage range and rail-torailoutputs make it an easy to use building block. Single-supplyoperation reduces the power consumption of the amplifier andhelps to protect the ADC from overdrive conditions. Internal, matched, precision laser-trimmed resistors ensurelow gain error, low gain drift of 1 ppm/°C (maximum), andhigh common-mode rejection of 80 dB. Low offset and lowoffset drift, combined with its fast settling time, make theAD8275 suitable for a variety of data acquisition applicationswhere accurate and quick capture is required. The AD8275 can be used as an analog front end, or it can followbuffers to level translate high voltages to a voltage range acceptedby the ADC. In addition, the AD8275 can be configured fordifferential outputs if used with a differential ADC. The AD8275 is available in a space-saving, 8-lead MSOP and is specified for performance over the −40°C to +85°C temperature range.ApplicationsLevel TranslatorADC DriverInstrumentation Amplifier Building BlockAutomated test equipment

The AD866x family are single supply, rail-to-rail output amplifiers with low noise performance featuring an extended operating range with supply voltages up to 16 V. They also feature low input bias currents, wide signal bandwidth, and low input voltage and current noise. For lower offset voltage, choose the AD8661/AD8662/AD8664 family.The combination of low offsets, very low input bias currents, and wide supply range make these amplifiers useful in a wide variety of cost sensitive applications normally associated with much higher priced JFET amplifiers. Systems using high impedance sensors, such as photo diodes, benefit from the combination of low input bias current, low noise, and low offset and bandwidth. The wide operating voltage range matches high performance ADCs and DACs. Audio applications and medical monitoring equipment can take advantage of the high input impedance, low voltage and current noise, wide bandwidth, and the lack of popcorn noise found in many other low input bias current amplifiers.The AD866x family is specified over the extended industrial temperature range (−40° to +125°C). See the Ordering Guide for automotive models.Applications Sensor amplificationReference buffersMedical equipmentPhysiological measurementsSignal filters and conditioningConsumer audioPhotodiode amplificationADC driverLevel shifting circuits

The AD823 is a dual precision, 16 MHz, JFET input op amp that can operate from a single supply of 3.0 V to 36 V or from dual supplies of ±1.5 V to ±18 V. It has true single-supply capability with an input voltage range extending below ground in single-supply mode. Output voltage swing extends to within 50 mV of each rail for IOUT ≤ 100 μA, providing outstanding output dynamic range.An offset voltage of 800 μV maximum, an 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. It provides 16 MHz, −3 dB bandwidth, −108 dB THD @ 20 kHz, and a 22 V/μs slew rate with a low supply current of 2.6 mA per amplifier. The AD823 drives up to 500 pF of direct capacitive load as a follower and provides an output current of 15 mA, 0.5 V from the supply rails. This allows the amplifier to handle a wide range of load conditions.This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for applications such as A/D drivers, high speed active filters, and other low voltage, high dynamic range systems.The AD823 is available over the industrial temperature range of −40°C to +85°C and is offered in both 8-lead PDIP and 8-lead SOIC packages.Applications Battery-powered precision instrumentation Photodiode preamps Active filters 12-bit to 16-bit data acquisition systems Medical instrumentation

The AD8260 includes a high current driver, usable as atransmitter, and a low noise digitally programmable variablegain amplifier (DGA), useable as a receiver.The receiver section consists of a single-ended input preamplifier,and linear-in-dB, differential-output DGA. The receiver hasa small signal –3 dB bandwidth of 230 MHz; the driver smallsignal bandwidth is 195 MHz. The driver delivers ±300 mA,well suited for driving low impedance loads, even whenconnected to a 3.3 V supply.The AD8260 DGA is ideal for trim applications and has a gainspan of 30 dB, in 3 dB steps. Excellent bandwidth uniformity ismaintained across the entire frequency range. The low output-referrednoise of the DGA is advantageous in driving highspeed ADCs. The differential output facilitates the interface tomodern low voltage high speed ADCs.Single-supply and dual-supply operation makes the part versatileand enables gain control of negative-going pulses, such as thosegenerated by photodiodes or photo-multiplier tubes, as well asprocessing band-pass signals on a single supply. For maximumdynamic range, it is essential that the part be ac-coupled whenoperating on a single supply.The AD8260 preamplifier (PrA) is configured with externalresistors for gains greater than 6 dB and can be inverting ornoninverting. The DGA is characterized with a noninvertingpreamplifier gain of 2×. The attenuator has a range of 30 dB andthe output amplifier has a gain of 8× (18.06 dB). The lowestnoninverting gain range is −6 dB to +24 dB and shifts up withincreased preamplifier gain. The gain is controlled via a parallelport (Pin GNS0 to Pin GNS3) with 10 gain steps of 3 dB percode. The preamplifier and DGA are disabled for any code thatis not assigned a gain step.The AD8260 can operate with single or dual supplies from 3.3 Vto ±5 V. An internal buffer normally provides a split supplyreference for single-supply operation; an external reference canalso be used when the VMID buffer is shut down.The operating temperature range is −40°C to +105°C. TheAD8260 is available in a 5 mm × 5 mm, 32-lead LFCSP.Applications Digital AGC systems Tx/Rx signal processing Power line transceivers

The AD8337 is a low noise, single-ended, linear-in-dB, general-purpose variable gain amplifier (VGA) usable at frequencies from dc to 100 MHz; the −3 dB bandwidth is 280 MHz. Excellent bandwidth uniformity across the entire gain range and low output-referred noise makes the AD8337 ideal for gain trim applications and for driving high speed analog-to-digital converters (ADCs).Excellent dc characteristics combined with high speed make the AD8337 particularly suited for industrial ultrasound, PET scanners, and video applications. Dual-supply operation enables gain control of negative-going pulses such as generated by photodiodes or photomultiplier tubes.The AD8337 uses the popular and versatile X-AMP® architecture, exclusively from Analog Devices, Inc., with a gain range of 24 dB. The gain control interface provides precise linear-in-dB scaling of 19.7 dB/V, referenced to VCOM.The AD8337 includes an uncommitted operational current-feedback preamplifier (PrA) that operates in inverting or noninverting configurations. Using external resistors, the device can be configured for gains of 6 dB or greater. The AD8337 is characterized by a noninverting PrA gain of 2× using two external 100 Ω resistors. The attenuator has a range of 24 dB, and the output amplifier has a fixed gain of 8× (18.06 dB). The lowest nominal gain range is 0 dB to 24 dB and can be shifted up or down by adjusting the preamp gain. Multiple AD8337s can be connected in series for larger gain ranges, and for interstage filtering to suppress noise and distortion, and for nulling offset voltages.The operating temperature range is –40°C to +85°C, and it is available in an 8-lead, 3 mm × 3 mm LFCSP.Applications Gain trim PET scanners High performance AGC systems I/Q signal processing Video Industrial and medical ultrasound Radar receivers