Description:All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed 0.15 mm, per side. 4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm, per side. 5. Reference JEDEC registration MO-153,
SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Seated Height-Max:
1.2 mm
Supply Current-Max:
30 mA
Supply Voltage-Max (Vsup):
5.5 V
Supply Voltage-Min (Vsup):
2.7 V
Surface Mount:
YES
Temperature Grade:
OTHER
Terminal Finish:
Matte Tin (Sn)
Terminal Form:
GULL WING
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
4.4 mm
LM4938MHX/NOPB Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for audio circuit board design, such as separating analog and digital grounds, using a solid ground plane, and minimizing trace lengths and widths.
Proper biasing is critical for the LM4938MHX/NOPB. Ensure that the voltage supply is within the recommended range (2.7V to 5.5V), and that the input and output capacitors are properly sized and placed. Additionally, ensure that the gain-setting resistors are correctly sized and matched to achieve the desired gain.
The maximum power dissipation of the LM4938MHX/NOPB is 250mW. To ensure it doesn't overheat, ensure good thermal conductivity between the device and the PCB, use a heat sink if necessary, and avoid operating the device at maximum power for extended periods.
Use a combination of passive and active filtering techniques, such as RC filters, ferrite beads, and shielding, to minimize noise and EMI. Additionally, ensure that the LM4938MHX/NOPB is properly bypassed and decoupled, and that the power supply is clean and well-regulated.
Yes, the LM4938MHX/NOPB can be used in a stereo audio application. To configure it, use two separate channels, one for each audio channel, and ensure that the gain-setting resistors and input/output capacitors are properly sized and matched for each channel.
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LM4938MHX/NOPB Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
