LM1972M/NOPBIn StockTexas Instruments
LM1972M/NOPB is a dual digitally controlled audio attenuator by Texas Instruments, offering 78dB attenuation range with 2dB step resolution and SPI interface control. Key specs: dual-channel, 8-bit SPI interface, -105dB THD+N. From $2.41, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LM1972M/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.4100(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual-channel audio attenuation with independent channel control for stereo applications
- Wide 78dB attenuation range in 2dB steps for precise volume control
- SPI serial interface for easy microcontroller integration
- Low THD+N of -105dB ensures high audio fidelity
- Single 5V supply operation with low power consumption
Applications
The LM1972M/NOPB is widely used in consumer audio equipment such as preamplifiers, mixing consoles, and home theater systems where precise digital volume control is required. It is also suitable for professional audio processing applications including equalizers and signal routing systems that demand low distortion and high channel separation.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 15 |
| Channel Separation | 110dB |
| Consumer IC Type | CONSUMER CIRCUIT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 4mA |
| Supply Voltage-Max (Vsup) | 12V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## LM1972M/NOPB Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM1972M/NOPB:
suggested
suggested
Frequently Asked Questions
What is the attenuation range and step size of the LM1972M/NOPB?
The LM1972M/NOPB provides a 78dB attenuation range with a 2dB step resolution, allowing fine-grained digital volume control across 40 discrete steps from 0dB to -78dB attenuation.
What interface does the LM1972M/NOPB use for control?
The LM1972M/NOPB uses an SPI (Serial Peripheral Interface) for digital control, making it straightforward to integrate with microcontrollers and DSPs. It supports a standard 3-wire SPI protocol for sending attenuation data to each channel independently.
What are the typical applications for the LM1972M/NOPB?
Typical applications include stereo preamplifiers, audio mixers, home theater receivers, digital audio workstations, and any system requiring precise, digitally controlled audio level adjustment with minimal distortion.
What package does the LM1972M/NOPB come in and what is its supply voltage?
The LM1972M/NOPB is available in an SOIC-16 surface-mount package and operates from a single 5V supply, making it compatible with most modern digital audio system power rails.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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