AZ386MTR-E1

Overview

The AZ386MTR-E1 is a Class-AB audio power amplifier manufactured by Diodes Incorporated in an SOIC-8 surface-mount package. It operates on a supply voltage range of 4V to 16V with a quiescent current drain of 6mA and a typical output power of 250mW into an 8Ω load at 6V. The device features internally set voltage gains ranging from 20 to 200, low total harmonic distortion of 0.27%, and a bandwidth of 500kHz. Designed for battery-powered applications, it includes ground-referenced inputs and automatic half-supply voltage biasing.

Feature Summary

• Low quiescent current drain suitable for battery operation
• Internally set gain with external adjustment capability
• Ground-referenced inputs with automatic output biasing
• Minimum external component requirements

Applications

• AM-FM Radio Amplifier
• Cordless Phone
• TV Sound Systems
• Portable Tape Player Amplifier
• Intercoms

Procurement Notes

Verify the specific suffix 'E1' confirms RoHS compliance as documented in the ordering information table. Confirm that the 'TR' designation indicates tape and reel packaging. Check the manufacturer's discontinuation notices, as this product is marked as not recommended for new design. Ensure the SOIC-8 package matches the required PCB footprint before procurement.

Selection Notes

Select this component for low-voltage consumer audio circuits requiring minimal external parts. The internal gain setting simplifies design compared to adjustable amplifiers. Verify that the 6mA quiescent current meets the system's power budget. Consider the thermal resistance of the SOIC-8 package when designing for higher ambient temperatures or continuous high-power operation.

Part Context

This part belongs to the AZ386 series of low voltage audio power amplifiers. It is functionally equivalent to other variants like the DIP-8 packaged AZ386P-E1 but utilizes a surface-mount form factor. The MTR suffix specifically denotes the SOIC-8 package type with tape and reel packing. It serves as a legacy solution for simple mono audio amplification tasks.

Replacement Considerations

Diodes Incorporated recommends using the PAM8304 as a replacement for new designs. Verify pinout compatibility if substituting with other Class-AB amplifiers. Ensure any alternative component supports the required 4V to 16V supply range and offers similar THD specifications.

FAQ

How is the voltage gain adjusted?

The gain is internally set to 20. Adding an external resistor and capacitor between pin 1 and pin 8 allows the gain to be increased to any value up to 200.

What is the input configuration?

The inputs are ground referenced, while the output automatically biases to one-half the supply voltage.