THS3091D
THS3091D - 235MHz Current-Feedback Op Amp | Texas Instruments
Texas Instruments THS3091D is a single, high-voltage, low-distortion current-feedback operational amplifier with a 235 MHz gain-bandwidth product, 7300 V/us slew rate, and operation across a ±5 V to ±15 V supply range. The device is supplied in an 8-pin SOIC package and is intended for applications requiring large, linear output signals, including pin drivers, power-FET drivers, VDSL line drivers, and arbitrary waveform generators.
A current-feedback operational amplifier is a voltage-input, current-output amplifier architecture whose closed-loop bandwidth is primarily controlled by the feedback resistor rather than by a single fixed gain-bandwidth product. In the THS3091D, this architecture supports high-speed operation while maintaining low distortion. The result is useful where conventional voltage-feedback amplifiers would require excessive gain, where signal amplitude and slew rate must remain accurate, or where a capacitive load must be driven through a carefully designed feedback network.
Key features include a 235 MHz bandwidth, 7300 V/us slew rate, and a high-voltage capability covering ±5 V to ±15 V supplies. The current-feedback topology provides high speed without relying on a voltage-feedback gain-bandwidth relationship of the same form. Its low-distortion characteristic supports signal-chain designs in which waveform fidelity and amplitude linearity are more important than micropower operation or rail-to-rail input/output capability.
The THS3091D is optimized for high-voltage, large-signal output stages. Its supply range permits bipolar or split-supply operation when the circuit requires an output centered around ground, while dual positive supplies can also be used when the signal and output are referenced above ground. Because it is a current-feedback device, feedback-resistor selection is central to achieving the intended bandwidth, gain, and stability rather than treating the feedback network as a passive gain-setting detail.
Typical uses include semiconductor pin drivers, power-FET gate drivers, VDSL line-driver outputs, high-voltage arbitrary waveform generation, and instrumentation requiring wide-band signal amplification. In each case, the 235 MHz bandwidth and 7300 V/us slew rate provide the speed needed to preserve large-amplitude waveforms, while the low-distortion architecture helps maintain signal fidelity. The 8-pin SOIC package permits conventional surface-mount assembly.
Designers should use the manufacturer datasheet for the complete pin assignment, recommended feedback values, output-current capability, input and output range, and stability constraints. The THS3091D is not a rail-to-rail input or output device, so input common-mode and output swing requirements must be checked against the selected supply voltages. Current-feedback amplifiers can be sensitive to feedback-component tolerances, parasitic capacitance, and capacitive loading.
This page consolidates the verified THS3091D product data, lifecycle information, source links, and selection guidance. It also distinguishes the SOIC THS3091D from other package or orderable variants and records unavailable electrical details explicitly rather than inferring them from unrelated THS309x-family members.
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