THS3115IDRG4

Instrumentation, Op Amps, Buffer Amps Overview

The THS3115IDRG4 is a dual low-noise, high-speed current-feedback operational amplifier manufactured by Texas Instruments. It operates within a supply voltage range of ±5 V to ±15 V (single supply 10 V to 30 V). Key electrical parameters include an 110-MHz small-signal bandwidth at unity gain and a typical slew rate of 1550 V/µs. The device features a minimum output current drive of 150 mA and includes a dedicated shutdown pin for power reduction. Input noise specifications are 2.2 nV/√Hz voltage noise and 2.9 pA/√Hz noninverting current noise.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrated low-power shutdown mode that reduces quiescent current per channel to approximately 300 µA when disabled.
• High output current capability with a guaranteed minimum drive of 150 mA for driving demanding loads.
• Low noise performance characterized by minimal input voltage and current noise densities for signal integrity.
• Current-feedback architecture optimized for wide bandwidth and fast transient response in video and communication circuits.

Instrumentation, Op Amps, Buffer Amps Applications

• Video distribution amplifiers requiring high slew rates and wide bandwidth.
• Communication equipment signal processing stages.
• Motor driver interfaces needing high output current.
• Piezo element drivers utilizing high-speed pulse capabilities.

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix IDRG4 corresponds to the industrial temperature range (-40°C to +85°C) and tape-and-reel packaging format. Confirm the component matches the SOIC-14 PowerPAD package outline. Ensure the datasheet revision aligns with the required design specifications before finalizing procurement orders.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring high output current and wide bandwidth with low noise. The current-feedback topology necessitates careful selection of feedback resistors for stability. Consider the shutdown feature if power management during idle states is critical. Verify thermal dissipation requirements for the SOIC-14 PowerPAD package under maximum load conditions.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the THS311x family of low-noise, high-speed current-feedback amplifiers from Texas Instruments. It shares architectural similarities with the single-channel THS3112 but provides dual channels in a single package. The series is designed for high-performance analog signal processing in video and RF applications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

THS3112IDRG4: Single-channel version of the same amplifier family; requires two units for dual-channel functionality.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the shutdown function operate on the THS3115?

The THS3115 includes a SHUTDOWN pin that allows the user to place the amplifier into a low-power standby mode. When activated, the quiescent current per channel drops significantly to approximately 300 µA.

What is the recommended feedback resistor value for stable operation?

For optimal frequency response with minimal peaking, a feedback resistor (RF) of 750 Ω is typically recommended for unity gain configurations, as specified in the application information section of the datasheet.