LM1036M/NOPB

Audio Special Purpose Overview

The LM1036M/NOPB is a dual DC-operated tone, volume, and balance circuit designed for stereo audio applications. It operates on a supply voltage range of 9V to 16V with a typical supply current of 35mA. The device provides a typical volume control range of 75dB and a channel separation of 75dB at 1kHz. Total harmonic distortion is typically 0.06% at 0.3Vrms input. It features a built-in zener regulated output of 5.4V for biasing external controls. The component is housed in a 20-SOIC package and supports an operating temperature range of 0°C to +70°C.

Audio Special Purpose Feature Summary

• Dual DC-controlled bass/treble, volume, and balance processing for stereo systems
• Wide supply voltage range from 9V to 16V
• Typical volume control range of 75dB and channel separation of 75dB
• Built-in 5.4V zener regulator for control potentiometer biasing

Audio Special Purpose Applications

• Car radio audio systems
• Television audio circuits
• Stereo audio pre-amplifiers

Audio Special Purpose Procurement Notes

The LM1036M/NOPB is classified as obsolete by Texas Instruments. Production has been discontinued, meaning the part is no longer recommended for new designs. Availability is limited to existing stock or secondary market sources. Designers should verify the authenticity of components sourced from non-authorized distributors due to the high risk of counterfeits for end-of-life parts.

Audio Special Purpose Selection Notes

This component requires a single DC supply between 9V and 16V. Tone response characteristics are determined by external capacitors (Cb and Ct), typically 0.39μF for bass and 0.01μF for treble to achieve ±15dB control. Loudness compensation can be implemented via Pin 7. Ensure the input signal does not exceed 1.6Vrms at VCC=12V to prevent overload at reduced gain settings.

Audio Special Purpose Part Context

The LM1036M/NOPB is the surface-mount variant of the LM1036 family, utilizing a 20-pin SOIC package. It shares identical electrical specifications with the through-hole LM1036N/NOPB. The 'NOPB' suffix indicates lead-free construction compliant with RoHS standards. This specific ordering code is marked as obsolete in TI's official product documentation.

Audio Special Purpose Replacement Considerations

Publicly documented direct replacements include the LM4610, which offers similar DC control functionality with added 3D sound field expansion and loudness compensation features.