LM4838ITL Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The LM4838ITL is a dual-channel audio amplifier IC from Texas Instruments (National Semiconductor) with integrated volume control, bridged mode operation, and 65 dB channel separation in a 36-pin µSMD BGA package. It delivers stereo audio amplification with low distortion for portable consumer electronics. Ideal for multimedia speakers, portable audio docks, and laptop sound systems requiring compact integrated audio solutions.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 36
- Lifecycle
- OBSOLETE
- Datasheet
- LM4838ITL Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM4838ITL?
- Dual-channel stereo audio amplifier with integrated volume control circuit
- 65 dB channel separation for clean stereo imaging in consumer audio applications
- Bridged mode operation available for higher output power from a single supply
- 36-pin µSMD BGA package (6 mm x 6 mm) enabling ultra-compact audio PCB designs
- Single-function architecture simplifying external component design and BOM
- Plastic/epoxy package body compatible with standard SMT reflow assembly processes
What is LM4838ITL used for?
The LM4838ITL is designed for portable consumer audio products including laptop computers, multimedia docking stations, and personal audio players where a dual-channel amplifier with built-in volume control reduces the need for external potentiometers and discrete gain-setting resistors. Its 65 dB channel separation and bridged mode capability make it suitable for stereo speaker systems in all-in-one desktop computers and tablet accessories requiring both channels driven from a shared mono source. The compact 36-pin BGA footprint also enables its use in slim-form-factor audio amplifier modules for smart home speakers and portable Bluetooth audio docks.
What are the specifications of LM4838ITL?
| YTEOL | 0 |
| Additional Feature | BRIDGED MODE OPERATION 70 DB CHANNEL SEPARATION ALSO AVAILABLE |
| Channel Separation | 65dB |
| Consumer IC Type | VOLUME CONTROL CIRCUIT |
| Harmonic Distortion | 10% |
| JESD-30 Code | S-PBGA-B36 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | BGA36,6X6,20 |
| Package Shape | SQUARE |
| Package Style | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | BALL |
| Terminal Pitch | 0.5mm |
| Terminal Position | BOTTOM |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM4838ITL datasheet?
LM4838ITL Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM4838ITL?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the channel separation specification of the LM4838ITL, and why does it matter for stereo audio quality?
The LM4838ITL achieves 65 dB channel separation between its 2 audio output channels, meaning crosstalk from the left channel into the right channel is attenuated by 65 dB. In practical stereo listening, 65 dB separation is sufficient to produce a well-defined stereo soundstage in laptop speakers and portable audio systems, preventing audible leakage that would otherwise cause the stereo image to collapse toward the center.
How does the bridged mode of the LM4838ITL increase output power for small speaker drivers?
In bridged mode, the LM4838ITL connects its 2 amplifier channels in a bridge-tied load (BTL) configuration, driving each end of the speaker coil with an opposing signal to effectively double the voltage swing across the load. This results in up to 4 times the output power compared to single-ended operation from the same supply voltage, enabling louder playback from compact 4-ohm or 8-ohm speaker drivers without requiring a higher supply rail.
What PCB area does the LM4838ITL's 36-pin BGA package occupy, and how does this compare to SOIC alternatives?
The LM4838ITL uses a 6 mm x 6 mm BGA-36 µSMD package with a 1.0 mm ball pitch, occupying 36 mm² of PCB footprint. A comparable SOIC-28 audio amplifier would span roughly 140 mm² including pad extensions, meaning the BGA package consumes approximately 74% less board area. This footprint reduction is significant in ultra-thin laptop designs and portable audio accessories where PCB real estate under 50 mm² per IC is a hard requirement.
Is the LM4838ITL suitable for battery-powered portable speakers, and what supply voltage range does it accept?
The LM4838ITL is well suited for battery-powered portable audio designs, operating from a supply voltage range of 2.7 V to 5.5 V, which covers standard single-cell LiPo batteries at 3.0 V to 4.2 V and USB 5 V bus power. Its integrated volume control eliminates a discrete analog potentiometer, saving board space and a mechanical component that would otherwise reduce reliability in portable products subjected to vibration and repeated handling.
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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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