THS3115CD

Instrumentation, Op Amps, Buffer Amps Overview

The THS3115CD 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) and features a small-signal bandwidth of 110 MHz at unity gain with ±15 V supplies. The device provides a typical slew rate of 1550 V/µs and a minimum output current drive of 150 mA. Key electrical characteristics include an input voltage noise density of 2.2 nV/√Hz and a shutdown quiescent current of 300 µA per channel. It is housed in a standard SOIC-14 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates a low-power shutdown mode that reduces quiescent current consumption significantly when disabled.
• Delivers high output current drive capability suitable for demanding load conditions.
• Provides wide supply voltage flexibility supporting both dual and single-supply configurations.
• Maintains low distortion and noise performance essential for high-fidelity signal processing.

Instrumentation, Op Amps, Buffer Amps Applications

• Video distribution amplifiers
• Communication equipment signal conditioning
• Motor drivers
• Piezo element drivers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'CD' corresponds to the commercial temperature range (0°C to +70°C) and SOIC-14 package configuration required for your design. Confirm that the datasheet specifications for the THS3115 apply, as it shares the family architecture with the THS3112. Ensure proper handling precautions are observed due to ESD sensitivity. Cross-reference the ordering information with the manufacturer's latest Package Option Addendum to validate availability and pinout compatibility.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring high slew rates and wide bandwidth without the gain-bandwidth product limitations of voltage-feedback amplifiers. The current-feedback architecture allows bandwidth to remain relatively constant across different closed-loop gains. Consider the shutdown feature if power management during idle states is critical. Evaluate thermal dissipation requirements based on the SOIC-14 package thermal resistance and expected operating currents.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the THS311x series of low-noise, high-speed current-feedback amplifiers from Texas Instruments. It is functionally similar to the THS3112 but packaged as a dual-channel unit in the SOIC-14 format. The series is designed for applications needing fast transient response and high output drive, distinguishing it from standard general-purpose operational amplifiers.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The THS3112 serves as the single-channel counterpart within the same family. For direct replacement, verify that the target application utilizes only one channel or can accommodate the unused channel. Ensure the PCB footprint supports the SOIC-14 package dimensions and that the thermal characteristics meet the system requirements.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the shutdown functionality operate?

The THS3115 includes a dedicated SHUTDOWN pin. Driving this pin to a logic high level disables the amplifier, reducing the quiescent current to approximately 300 µA per channel. Driving it low enables normal operation.

What is the recommended feedback resistor value?

For optimal stability and frequency response, a feedback resistor (RF) of 750 Ω is typically recommended for unity gain configurations. Specific values for other gains are provided in the datasheet's application information section.