Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: OPA84x family
Edited by the Electronicstalk Editorial Team on 23 July 2003
Amplifiers boost speed
and dynamic range
A new family of high-speed operational amplifiers features wide bandwidth, low distortion and low noise
The devices are ideal for driving 12 to 16bit ADCs and DACs, as well as general-purpose op amp applications including video line drivers, wideband integrators, active filtering and low-noise receivers. 'The OPA84x family provides a level of speed and dynamic range previously unattainable in a monolithic op amp', said Michael Steffes, Strategic Marketing Manager of TI's high-speed signal processing group.
This article was originally published on Electronicstalk on 23 July 2003 at 8.00am (UK)
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'These products give customers a lower-priced alternative with unequalled DC precision and AC signal handling properties versus competitive offerings'.
The OPA842 uses a unity-gain-stable, voltage-feedback architecture with two internal gain stages to achieve exceptionally low harmonic distortion (-93dBc at 5MHz) over a wide frequency range.
The OPA842 features 400MHz bandwidth (unity gain), 200MHz gain bandwidth product, 400V/us slew rate, 2.6nV/(rt)Hz input noise, fast 12bit settling (22ns at 0.01%), 110dB open-loop gain and 100mA output current.
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The OPA843 uses a higher gain bandwidth, two gain-stage design to achieve a medium gain range with exceptional dynamic range.
A low-noise input complements this high dynamic range with DC precision improved over all previous high-speed amplifiers.
The OPA843 features 2.0nV/(rt)Hz input noise, 260MHz bandwidth (G=5), 800MHz gain bandwidth product, 1000V/us slew rate, -96dBc distortion (5MHz), fast 12bit settling time (10.5ns at 0.01%), 110dB open-loop gain and 100mA output current.
The OPA846 steps the gain bandwidth up another step with even lower input noise.
The OPA846 features 400MHz bandwidth (G=10), 1.75GHz gain bandwidth product, 625V/us slew rate and 1.2nV/(rt)Hz input noise on 12.6mA supply current.
The OPA847 gives the industry's highest gain bandwidth (3.9GHz) and lowest input voltage noise (0.85nV/(rt)Hz).
Other features include 900V/us slew rate, 18mA supply current, +/-65mA output current and -95dBc distortion (5MHz).
Where power savings is critical, the OPA847 includes an optional power shutdown pin that will reduce power dissipation to less than 2mW.
All devices in the OPA84x family offer low input offset voltage (300uV), low input offset current (350nA) and very stable DC/AC performance over temperature.
The OPA84x family is packaged in SOT23 and SO-8 packages.
Suggested resale pricing ranges from $1.45 to $1.89, based on 1000-piece quantities.
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