THS4281DGKR

Instrumentation, Op Amps, Buffer Amps Overview

The THS4281DGKR is a voltage-feedback operational amplifier manufactured by Texas Instruments in an 8-pin VSSOP package. It features a unity-gain bandwidth of 90 MHz and a slew rate of 35 V/µs at VS = 5 V. The device operates on supply voltages ranging from 2.7 V to 16.5 V single-supply or ±1.35 V to ±8.25 V dual-supply, with a quiescent current of 750 µA. Key electrical parameters include an input offset voltage of 2.5 mV, open-loop gain of 105 dB, and low voltage noise density of 12.5 nV/√Hz.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Rail-to-rail input and output capability allows signal swing within 40 mV of the rails with 10-kΩ loads.
• Very low power consumption with a typical quiescent current of 750 µA at 5 V for battery-sensitive applications.
• High-speed performance characterized by a 90 MHz unity-gain bandwidth and 35 V/µs slew rate.

Instrumentation, Op Amps, Buffer Amps Applications

• Portable and battery-powered systems requiring high performance with minimal power draw
• High channel count systems utilizing space-saving packages
• ADC buffering for high-resolution analog-to-digital conversion
• Active filter circuits
• High-side current sensing applications

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify that the component matches the specific DGK suffix for the VSSOP-8 package configuration. Confirm the datasheet revision SLOS432B corresponds to the manufacturing lot. Ensure the operating environment remains within the specified -40°C to +85°C temperature range to maintain the stated electrical characteristics and thermal reliability limits.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a balance between high-speed signal processing and low power consumption is required. The rail-to-rail I/O functionality makes it suitable for single-supply designs where maximizing dynamic range is critical. Consider the VSSOP-8 package dimensions if board space is constrained compared to standard SOIC options.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the THS4281 family of very low-power, high-speed operational amplifiers fabricated using BiCom-II process technology. The DGKR suffix indicates the specific VSSOP-8 packaging variant. The device is designed to operate over a wide power-supply range, supporting both single and dual supply configurations for versatile system integration.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes are not explicitly listed in the provided documentation. Verify pinout compatibility and electrical specifications against alternative voltage-feedback amplifiers if cross-referencing is necessary.

Instrumentation, Op Amps, Buffer Amps FAQ

Does the THS4281 experience phase reversal during high-side current sensing?

No, the THS4281 is specified with a common-mode input range extending 400 mV beyond the rails, which prevents phase reversal concerns in high-side current sensing applications.

What is the maximum operating supply voltage for the THS4281?

The absolute maximum supply voltage rating is 16.5 V. The recommended operating conditions specify a maximum single supply of 16.5 V or a maximum dual supply of ±8.25 V.