LM1971MX/NOPB.pdf
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The LM1971MX/NOPB is a digitally controlled audio attenuator developed by Texas Instruments for applications that require accurate and repeatable control of audio signal levels. Attenuation is programmable in precise 1 dB increments over a wide range from 0 dB to −62 dB, allowing fine-grained volume adjustment without introducing audible artifacts.
Unlike mechanical potentiometers, the LM1971 uses an integrated resistor ladder and digital control interface to provide stable, long-term volume control performance. A dedicated mute function offers more than 100 dB of attenuation, effectively disconnecting the audio path when required.
With extremely low total harmonic distortion and a wide dynamic range, the LM1971MX/NOPB is well suited for high-fidelity consumer audio, professional audio equipment and embedded systems where signal integrity and channel consistency are critical.
Supports attenuation control in exact 1 dB steps, enabling smooth and predictable volume transitions without clicks or pops.
Achieves very low distortion with a typical THD+N of 0.0008% at 1 kHz, preserving audio clarity even at low signal levels.
A dynamic range of up to 115 dB supports high-quality audio playback in both consumer and professional systems.
The SOIC-8 package enables easy integration into compact audio PCBs while maintaining excellent electrical performance.
Allows precise attenuation control via a digital interface, enabling easy integration with microcontrollers, audio processors and system controllers.
Provides more than 100 dB of attenuation, ensuring complete signal suppression when mute is enabled.
The internal resistor ladder architecture maintains consistent channel performance and avoids the wear and drift associated with mechanical potentiometers.
| Parameter | Value / Condition |
|---|---|
| Function | Digitally controlled audio attenuator |
| Number of Channels | 1 |
| Attenuation Range | 0 dB to −62 dB (1 dB steps) |
| Mute Attenuation | >100 dB |
| Supply Voltage | 4.5 V to 15 V |
| THD + N (1 kHz) | 0.0008% (typ.) |
| Dynamic Range | 115 dB (typ.) |
| Operating Temperature | −40 °C to +85 °C |
| Package | SOIC-8 |
| Base Product Number | LM1971 |
The LM1971MX/NOPB has several same-family and pin-compatible variants within the Texas Instruments LM1971 series, allowing flexible sourcing without circuit redesign:
These variants share the same electrical characteristics and control behavior. When selecting an alternative, confirm package suffix, temperature grade and environmental compliance.
Texas Instruments is a global leader in analog and embedded semiconductor solutions. TI's audio portfolio includes amplifiers, codecs, attenuators and signal processors for consumer, professional and industrial audio systems.
The LM1971 family is widely adopted for its reliable digital volume control, long product lifecycle and consistent audio performance.
Used in amplifiers, mixers and audio receivers for precise volume control without mechanical potentiometers.
Provides repeatable attenuation control in studio and broadcast audio equipment.
Integrated into MCU-controlled audio systems where digital control and consistent audio performance are required.
Ideal for high-end audio products demanding low distortion, wide dynamic range and smooth volume control.
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Pricing and inventory for LM1971MX/NOPB fluctuate and are updated periodically (typically within 24 hours). Quotations generally remain valid for 5 days unless otherwise stated.
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We perform Pre-Shipment Inspection (PSI) on randomly selected units before shipping. If there is an issue with LM1971MX/NOPB, returns/replacements are accepted when:
Steps: (1) Inform us within 90 days; (2) Obtain Return Authorization (RMA) before sending items back.
Please contact us for technical documents and support related to Texas Instruments LM1971MX/NOPB, including pin diagrams and datasheets. Our team will respond promptly.
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