PAM8403ADR Equivalent & Substitute Parts

Part Overview

The PAM8403ADR is a Class D stereo amplifier integrated circuit manufactured by Diodes Incorporated, designed for 2-channel audio amplification applications. This device delivers 3W per channel at 4Ω load impedance and operates across a 2.5V to 5.5V supply voltage range. The PAM8403ADR integrates depop, short-circuit, and thermal protection features within a 16-SOIC surface mount package.

The PAM8403ADR carries an obsolete product status, indicating that the manufacturer has discontinued active production and support. Identifying equivalent substitute parts is necessary to ensure continued design flexibility, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this amplifier topology.

Substiute Parts

PAM8403ADR

Diodes IncorporatedIn Stock: 900PAM8403ADR Datasheet

Current PartRFQ

PAM8403DR

Diodes IncorporatedIn Stock: 17395PAM8403DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PAM8403ADR is determined by strict alignment across the following critical parameters:

Electrical Compatibility Parameters:

• Amplifier topology (Class D)
• Output channel configuration (2-Channel Stereo)
• Output power rating (3W per channel at 4Ω load)
• Protection feature set (Depop, Short-Circuit, Thermal Protection)
• Operating temperature range (-40°C ~ 85°C)

Physical Compatibility Parameters:

• Mounting technology (Surface Mount)
• Package footprint (16-SOIC, 0.154" width, 3.90mm)

Regulatory Compliance Parameters:

• RoHS3 compliance status
• REACH compliance status

The PAM8403DR qualifies as a direct substitute based on matching all electrical functionality, protection features, operating temperature specifications, and physical package dimensions. Supply voltage range variations and packaging format differences do not preclude substitution when the application requirements fall within the overlapping voltage specification window.

Parameter Comparison

Engineering Selection Recommendations

The PAM8403DR serves as the direct substitute for the obsolete PAM8403ADR based on the following engineering criteria:

Functional Equivalence: Both devices implement identical Class D amplifier architecture with 2-channel stereo output, 3W per channel power delivery at 4Ω load, and matching protection feature integration (depop, short-circuit, and thermal protection).

Package Compatibility: Both parts utilize the 16-SOIC surface mount package with identical physical dimensions (0.154" width, 3.90mm), ensuring direct PCB footprint compatibility without layout modifications.

Regulatory Alignment: The PAM8403DR maintains ROHS3 and REACH compliance status, satisfying the same environmental and regulatory requirements as the original part.

Supply Voltage Consideration: The PAM8403DR specifies a minimum supply voltage of 2.8V compared to the PAM8403ADR's 2.5V minimum. Applications operating exclusively within the 2.8V to 5.5V window experience no functional limitation. Applications requiring operation below 2.8V require design review to confirm compatibility with the substitute part's voltage specification.

Product Status Advantage: The PAM8403DR maintains active production status with established supply chain availability (17,286 units in stock), providing long-term design continuity and procurement reliability compared to the obsolete PAM8403ADR.

Frequently Asked Questions (FAQ)

Q: Can the PAM8403DR directly replace the PAM8403ADR without PCB modifications?

A: Yes. Both devices share identical 16-SOIC package dimensions and pinout compatibility, enabling direct substitution on existing PCB layouts without physical modifications.

Q: What is the primary difference between these two parts?

A: The PAM8403ADR is obsolete, while the PAM8403DR is actively produced. The PAM8403DR specifies a minimum supply voltage of 2.8V versus the PAM8403ADR's 2.5V minimum. All other electrical and physical specifications are identical.

Q: Does the supply voltage difference affect my application?

A: The supply voltage difference affects only applications requiring operation below 2.8V. If your design operates within the 2.8V to 5.5V range, the PAM8403DR functions identically to the PAM8403ADR. Applications with lower voltage requirements must confirm compatibility with the 2.8V minimum specification.

Q: Are the protection features identical between both parts?

A: Yes. Both the PAM8403ADR and PAM8403DR integrate depop, short-circuit, and thermal protection features with identical functionality and performance characteristics.

Q: What is the operating temperature range for both devices?

A: Both devices operate across the identical temperature range of -40°C to 85°C (TA), supporting applications across industrial, commercial, and consumer temperature environments.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PAM8403ADR and PAM8403DR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What packaging formats are available for the PAM8403DR?

A: The PAM8403DR is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both manual assembly and automated reel-fed production processes.