All Products

The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery-powered, portable (or remote) applications. The AD620, with its high accuracy of 40 ppm maximum non linearity, low offset voltage of 50 ?V max, and offset drift of 0.6 ?V/?C max, is ideal for use in precision data acquisition systems, such as weigh scales and transducer interfaces. Furthermore, the low noise, low input bias current, and low power of the AD620 make it well suited for medical applications, such as ECG and noninvasive blood pressure monitors. The low input bias current of 1.0 nA max is made possible with the use of Super?eta processing in the input stage. The AD620 works well as a pre-amplifier due to its low input voltage noise of 9 nV/?Hz at 1 kHz, 0.28 ?V p-p in the 0.1 Hz to 10 Hz band, and 0.1 pA/?Hz input current noise. Also, the AD620 is well suited for multiplexed applications with its settling time of 15 ?s to 0.01%, and its cost is low enough to enable designs with one in-amp per channel.

The AD623 is an integrated. or dual-supply instrumentation amplifier that delivers rail-to-rail output swing using supply voltages from 3 V to 12 V. The AD623 offers superior user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pin out configuration_ With no external resistor, the AD623 is configured for unity gain (G I), and with an external resistor, the AD623 can be programmed for gains of up to The superior accuracy of the AD623 is the result of increasing ac common -mode rejection ratio (CMRR) coincident with increasing gain; line noise harmonics are rejected due to constant CAIRR up to 200 Hz. The AD623 has a wide input common-mode range and amplifies signals with common- mode voltages as low as 150 mV below ground. The AD623 maintains superior performance with dual and single polarity power supplies.

The AD633 is a functionally complete, four-quadrant, analog multiplier. Four quadrant means that both operands that are multiplied can take

The AD694 is a monolithic current transmitter that accepts high level signal inputs to drive a standard 4?20 mA current loop for the control of valves, actuators, and other devices commonly used in process control. The input signal is buffered by an input amplifier that can be used to scale the input signal or buffer the output from a current mode DAC. Precalibrated input spans of 0 V to 2 V and 0 V to 10 V are selected by simple pin strapping; other spans may be programmed with external resistors. The output stage compliance extends to within 2 V of VS and its special design allows the output voltage to extend below common in dual supply operation. An alarm warns of an open 4?20 mA loop or noncompliance of the output stage. Active laser trimming of the AD694?s thin film resistors results in high levels of accuracy without the need for additional adjustments and calibration. An external pass transistor may be used with the AD694 to off-load power dissipation, extending the temperature range of operation. The AD694 is the ideal building block for systems requiring noise immune 4?20 mA signal transmission to operate valves, actuators, and other control devices, as well as for the transmission of process parameters such as pressure, temperature, or flow. It is recommended as a replacement for discrete designs in a variety of applications in industrial process control, factory automation, and system monitoring. The AD694 is available in hermetically sealed, 16-pin CERDIP and plastic SOIC, specified over the ?40?C to +85?C industrial temperature range, and in a 16-pin plastic DIP, specified over the 0?C to +70?C temperature range. The AD654 is a monolithic V/F converter consisting of an input amplifier, a precision oscillator system, and a high current output stage. A single RC network is all that is required to set up any full scale (FS) frequency up to 500 kHz and any FS input voltage up to ? 30 V. Linearity error is only 0.03% for a 250 kHz FS, and operation is guaranteed over an 80 dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ?50 ppm/?C. The AD654 operates from a single supply of 5 V to 36 V and consumes only 2.0 mA quiescent current. The low drift (4 ?V/?C typ) input amplifier allows operation directly from small signals such as thermocouples or strain gauges while offering a high (250 M?) input resistance. Unlike most V/F converters, the AD654 provides a square-wave output, and can drive up to 12 TTL loads, optocouplers, long cables, or similar loads. 

The AD737 is a low power, precision, monolithic, true rms-to-dc converter. It is laser trimmed to provide a maximum error of ?0.2 mV ? 0.3% of reading with sine wave inputs. Furthermore, it maintains high accuracy while measuring a wide range of input waveforms, including variable duty cycle pulses and triac (phase) controlled sine waves. The low cost and small physical size of the AD737 make it suitable for upgrading the performance of non-rms precision rectifiers in many applications. Compared to these circuits, the AD737 offers higher accuracy at equal or lower cost. The AD737 computes the rms value of both ac and dc input voltages, and is ac-coupled by adding an input capacitor. In this mode, the AD737 resolves input signal levels of 100 ?V rms or less, despite variations in temperature or supply voltage. High accuracy is maintained for input waveforms with crest factors of 1 to 3 and crest factors at 2.5% or less with respect to full-scale input level. The AD737 has no output buffer amplifier, thereby significantly reducing dc offset errors occurring at the output and making the device highly compatible with high input impedance ADCs. Requiring only 160 ?A of power supply current, the AD737 is optimized for use in portable multimeters and other battery powered applications. In power-down mode, the standby supply current in is typically 25 ?A. The AD737 has both high (1012 ?) and low impedance input options. The high-Z FET input connects high source impedance input attenuators, and a low impedance (8 k?) input accepts rms voltages of up to 0.9 V while operating from the minimum power supply voltage of ?2.5 V. The two inputs can be used either single-ended or differentially. The AD737 achieves 1% of reading error bandwidth, exceeding 10 kHz for input amplitudes from 20 mV rms to 200 mV rms, while consuming only 0.72 mW. The AD737 is available in two performance grades. The AD737J and AD737K grades operate over the commercial temperature range of 0?C to 70?C. The AD737JR-5 is tested with supply voltages of ?2.5 V dc. The AD737A grade operates over the industrial temperature range of ?40?C to +85?C. The AD737 is available in two low cost, 8?lead packages: PDIP and SOIC_N.

The AD790 is a fast (45 ns), precise voltage comparator, with a number of features that make it exceptionally versatile and easy to use. The AD790 may operate from either a single 5 V supply or a dual ?15 V supply. In the single-supply mode, the AD790?s inputs may be referred to ground, a feature not found in other comparators. In the dual-supply mode it has the unique ability of handling a maximum differential voltage of 15 V across its input terminals, easing their interfacing to large amplitude and dynamic signals. This device is fabricated using Analog Devices? Complementary Bipolar (CB) process?which gives the AD790?s combination of fast response time and outstanding input voltage resolution (1 mV max). To preserve its speed and accuracy, the AD790 incorporates a ?low glitch? output stage that does not exhibit the large current spikes normally found in TTL or CMOS output stages. Its controlled switching reduces power supply disturbances that can feed back to the input and cause undesired oscillations. The AD790 also has a latching function which makes it suitable for applications requiring synchronous operation. The AD790 is available in five performance grades. The AD790J and the AD790K are rated over the commercial temperature range of 0?C to 70?C. The AD790A and AD790B are rated over the industrial temperature range of ?40?C to +85?C. The AD790S is rated over the military temperature range of ?55?C to +125?C.