NCP2809ADMR2

Overview

The NCP2809ADMR2 is a stereo headphone power amplifier delivering 135 mW into 16 Ω loads from a 5.0 V supply. It operates on a 2.2 V to 5.5 V range with an internal gain of 0 dB. The device features excellent PSRR, pop-and-click noise protection, and ultra-low shutdown current. It supports NOCAP configurations or single-ended modes with external coupling capacitors.

Feature Summary

• Integrated pop and click noise protection circuitry for clean audio transitions
• Ultra-low current shutdown mode for extended battery life in portable devices
• High power supply rejection ratio enabling direct connection to battery sources
• Thermal overload protection circuitry to safeguard against excessive temperatures

Applications

• Cellular phones
• Portable stereo systems
• MP3 players
• Personal and notebook computers

Procurement Notes

Verify the DM suffix indicates the Micro10 package (CASE 846B1). Confirm the 'E' designation within the ordering code corresponds to the NCP2809A variant with fixed 0 dB gain. Ensure Pb-free compliance matches project requirements. Check datasheet revision for any updates to electrical characteristics or application schematics before finalizing designs.

Selection Notes

Select this component when a fixed 0 dB gain is required for the audio path. Choose the NCP2809ADMR2 over the B variant if external gain setting resistors are undesirable. Consider the Micro10 package constraints for PCB layout. Evaluate thermal dissipation capabilities based on the specific load impedance and supply voltage conditions expected in the target application.

Part Context

This part belongs to the NCP2809 series of cost-effective stereo audio power amplifiers designed for low-power portable systems. It eliminates the need for bootstrap capacitors or snubber networks, optimizing it for space-constrained mobile applications. The series includes variants like the NCP2809B which allows for external gain configuration.

Replacement Considerations

NCP2809ADMR2G is the lead-free version of the same functional device. NCP2809BDMR2 offers adjustable gain but requires different external components. Verify pinout compatibility and thermal performance when substituting with other stereo headphone amplifiers from different manufacturers.

FAQ

How does the NCP2809ADMR2 handle output coupling capacitors?

It supports both NOCAP configurations using a virtual ground and single-ended modes requiring external output coupling capacitors.

What is the internal gain of the NCP2809A variant?

The NCP2809A has a fixed internal gain of 0 dB.