ADAU1590ACPZ-RL

Overview

The ADAU1590ACPZ-RL is a two-channel, bridge-tied load (BTL) switching audio power amplifier manufactured by Analog Devices Inc. It integrates a fifth-order Sigma-Delta modulator and a high-power output stage within an LFCSP-48 package. The device operates from a power supply voltage range of 9 V to 15 V for the PVDD rail, while analog and digital logic circuits function at 3.3 V. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.005%, a dynamic range of 101 dB, and a power supply rejection ratio exceeding 55 dB. Output power capabilities reach up to 12.5 W into a 4 Ω load.

Feature Summary

• Integrates a fifth-order Sigma-Delta modulator with internal feedback from the power stage to minimize external component count and enhance linearity.
• Features an on-chip slicer block that allows users to externally limit maximum output power via a threshold resistor connected to the SLC_TH pin.
• Includes comprehensive protection mechanisms such as thermal warning and shutdown flags, overcurrent detection, undervoltage lockout, and clock loss monitoring.
• Provides programmable gain amplification settings selectable via PGA pins, enabling flexible input level matching without external resistors.

Applications

• Flat panel televisions
• PC audio systems
• Mini-component speaker systems

Procurement Notes

Verify the obsolete status of this component before finalizing designs. Confirm availability through authorized distributors or secondary markets. Ensure the LFCSP-48 package variant matches the required PCB footprint. Check for moisture sensitivity levels and reflow soldering profiles compatible with manufacturing equipment.

Selection Notes

Select this amplifier for applications requiring high efficiency and low distortion in a compact form factor. Consider the integrated Sigma-Delta modulation for simplified filterless designs. Evaluate the thermal dissipation requirements based on the specific load impedance and supply voltage. Verify that the microcontroller interface can handle the active-low error and mute signals effectively.

Part Context

This component belongs to the ADAU1590 series of Class-D audio power amplifiers. It is designed for stereo audio reproduction where space constraints and performance are critical. The integration of the modulator and power stage distinguishes it from discrete solutions, offering a complete amplification solution in a single surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers: None available.