Operational Amplifiers Selection Guide 2011–2012 www.analog.com/opamps www.analog.com/opamps | 1

2 | Operational Amplifier Selection Guide

Op Amp Glossary Common-Mode Voltage Range (CMVR) Open- Loop Gain (AVO) Also known as input voltage range, CMVR is the allowable input voltage range at both inputs before clipping or excessive nonlinearity is seen at the output. The ratio of the output voltage to the input offset voltage between the two input pins. The result is expressed in dB. Gain is usually specified only at dc (AO), but for many applications, such as high speed amplifiers for video and RF, the frequency dependence of gain is also important. For this reason the open loop gain and phase response is published for each amplifier....

Amplifier Design Technology Clamp Amplifiers Quad Core (H Bridge) Clamp amplifiers allow the designer to specify a high (VCH) and low (VCL) output clamp voltage so the output signal will clamp at the specified levels. Analog Devices’ unique CLAMPIN™ input clamp architecture offers significant improvement in clamp performance compared to traditional output clamping devices, minimizing clamp error and distortion in the clamp region. Analog Devices has patented the quad core architecture, which supplies current on-demand to charge and discharge the internal dominant pole capacitor, while allowing...

Amplifier Process and Trimming Technology Process Technology JFET Input Amplifiers Bipolar JFET input amplifiers have the advantage over bipolar devices by having an extremely high input impedance along with low noise performance, making them very useful in amplifier circuits using very small signals such as high source impedance sensors and photodiodes. A typical JFET has a voltage noise slightly larger than a BJT, but its current noise is significantly lower. Bipolar technology delivers the best overall performance amplifiers. It offers high output current drive, high voltage operation, and...

Quick Selection Guide for High Speed Operational Amplifiers (BW > 50 MHz) Single I Dual I Triple High Speed Op Amps Differential Amplifiers High Performance High Supply Voltage (±15 V) High Current Output (>300 mA) Adjustable Clamp Amplifiers

Precision Amplifiers (Vos < 1 mV, Bandwidth < 50 MHz) Zero-Drift Amplifiers ADA4528-1: Precision, Ultralow Noise, RRIO, Zero-Drift Op Amp The ADA4528-1 is an ultralow noise, zero-drift operational amplifier featuring rail-to-rail input and output swing. With an offset voltage of 2.5 |xV, offset voltage drift of 0.015 \iM/°C, and noise of 97 nV p-p (0.1 Hz to 10 Hz, Av = +100), the device is well suited for applications in which error sources cannot be tolerated. With wide operating supply range of 2.2 V to 5.5 V, high gain and excellent CMRR and PSRR specifications, the ADA4528-1 is ideal for...

Precision Amplifiers (Vos < 1 mV, Bandwidth < 50 MHz) Zero Input Crossover Distortion (ZCO) Amplifiers ADA4505-2:10 |LA, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifier The ADA4505-X family solves the crossover distortion problem by using an on-chip charge pump to power the input differential pair. The charge pump creates a supply voltage higher than the voltage of the battery, allowing the input stage to handle a wide range of input signal voltages without using a second differential pair. With this solution, the input voltage can vary from one supply extreme to the other with no...

Precision Amplifiers (Vos < 1 mV, Bandwidth < 50 MHz) Overvoltage Protection (OVP) Amplifiers ADA4091-2/ADA4091-4: Micropower, OVP, Rail-to-Rail Input/Output Operational Amplifier The ADA4091 -2 dual and ADA4091 -4 quad are micropower, single-supply, 1.2 MHz bandwidth amplifiers featuring rail-to-rail inputs and outputs. They are guaranteed to operate from a +2.7 V to +30 V single supply, as well as from ±1.35 V to ±15 V dual supplies. The ADA4091 family features a unique input stage that allows the input voltage to exceed either supply safely without any phase reversal or latch-up; this is called...

Precision Amplifiers (Bandwidth < 50 MHz) Ultralow Offset Voltage (Vos < 250 JLV Max) Amplifiers AD8597/AD8599: Ultralow Distortion, Ultralow Noise Operational Amplifier The AD8597 (single) and AD8599 (dual) are very low noise, low distortion operational amplifiers ideal for use as preamplifiers. The low noise of 1.1 nV/VHz and low harmonic distortion of -120 dB (or better) at audio bandwidths give the devices the wide dynamic range necessary for preamplifiers in audio, medical, and instrumentation applications. The excellent slew rate of 14 V/jxs and 10 MHz gain bandwidth make them highly suitable...

Ultralow Offset Voltage (V^ < 250 |iV Max) Amplifiers 1 RRIO: rail-to-rail input/output, RRO: rail-to-rail output, SS: single supply (IVR includes -VSY).

Precision Amplifiers (Vos < 1 mV, Bandwidth < 50 MHz) AD8657: Precision, Micropower, 18 V CMOS RRIO Op Amplifier The AD8657 is a dual, precision, micropower, rail-to-rail input/output (RRIO) amplifier optimized for low power and wide operating supply voltage range applications. The device operates from 2.7 V up to 18 V with a typical quiescent supply current of 18 jxA and achieves low offset voltage thanks to Analog Devices' patented DigiTrim trimming technique. The AD8657 also has high immunity to electromagnetic interference. The combination of low supply cur- rent, low offset voltage, very...

Precision Amplifiers (Vos < 1 mV, Bandwidth < 50 MHz) Low Power (ls/Amp < 1 mA) Amplifiers AD8500: Micorpower, Precision CMOS Operational Amplifier The AD8500 is a low power, precision CMOS op amp featuring a maximum supply current of 1 LIA. 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 • Supply current: 1 LIA maximum • Offset voltage: 1 mV maximum • Single-supply or dual-supply operation • Rail-to-rail input and output • Unity-gain stable...