Low power high-speed, voltage feedback amplifier

25th March 2008

ES Admin

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Texas Instruments has today a high-speed, unity gain stable, voltage feedback amplifier that features more than 90 percent less power than devices with comparable slew rates in the market today. The new device’s unique architecture provides designers with high bandwidth and slew rate, coupled with a very low quiescent current, making it well-suited for portable instrumentation, active filters and analog-to-digital converter (ADC) buffers.

The OPA2889 represents a significant evolution in unity gain stable, voltage feedback amplifiers, offering an excellent combination of bandwidth and slew rate capabilities while consuming only 460 µA of quiescent current per channel. Coupled with the ultra low power, the high bandwidth of 115 MHz and slew rate of 250 V/µs, allows customers to process data faster and more efficiently. The device also includes a power down feature, enabling even further power savings by reducing the quiescent current to 18 µA/channel when not in use.

Along with the bandwidth and slew rate capabilities, the OPA2889 offers a flexible single supply voltage range of +2.6 V to +12 V or dual supply voltage range of ±1.3 V to ±6 V. In addition, it provides a large output swing of 8 Vpp and output current of ± 40 µA. These features minimize signal distortion to increase fidelity while giving designers greater flexibility.