TI's High-Speed Amplifiers Benefit High-End Signal Processing Apps

7/21/2003 - Texas Instruments (TI) Incorporated (NYSE: TXN) announced a family of high-speed operational amplifiers from the company´s Burr-Brown product line, featuring wide bandwidth, low distortion and low noise. The devices are ideal for driving 12- to 16-bit analog-to-digital converters (ADC) and digital-to-analog converters (DAC), 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. "These products give customers a lower-priced alternative with unequaled DC precision and AC signal handling properties versus competitive offerings."

The OPA842 utilizes 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 (G = 1), 200MHz gain bandwidth product, 400V/us slew rate, 2.6nV/rtHz input noise, fast 12-bit settling (22ns at 0.01%), 110dB open-loop gain and 100mA output current.

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/rtHz input noise, 260MHz bandwidth (G = 5), 800MHz gain bandwidth product, 1,000V/us slew rate, -96dBc distortion (5MHz), fast 12-bit 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/rtHz 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/rtHz). 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 decrease power dissipation to <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.

Available Today
The OPA84x family is packaged in SOT23 and SO-8 packages. Suggested resale pricing is based on 1,000 piece quantities:

OPA842 = $1.45
OPA843 = $1.49
OPA846 = $1.59
OPA847 = $1.89

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