AD1990ACPZRL7

Overview

The AD1990ACPZRL7 is a two-channel, bridge-tied load (BTL) switching audio power amplifier with an integrated Sigma-Delta modulator. It accepts single-ended analog inputs and converts them to switching waveforms for direct speaker drive. The device operates from a power supply range of 8 V to 12 V, while the analog and digital logic sections utilize a 5 V supply. Key performance metrics include a signal-to-noise ratio of 102 dB and total harmonic distortion plus noise as low as 0.003%. It features programmable gain amplification, thermal warning at 135°C, and thermal shutdown at 150°C.

Feature Summary

• Integrated Sigma-Delta modulation and H-bridge power stage for high-efficiency audio amplification
• Digital microprocessor-compatible interface for control of reset, mute, and PGA gain settings
• Built-in protection mechanisms including overcurrent short-circuit detection and thermal shutdown
• Pop and click suppression circuitry for silent turn-on and turn-off transitions

Applications

• Advanced televisions
• Compact multimedia systems
• Minicomponents

Procurement Notes

Verify the specific suffix RL7 against official Analog Devices documentation to confirm reel packaging specifications. Ensure compatibility with the required 12.288 MHz clock frequency and 5 V logic levels. Confirm that the LFCSP package thermal requirements are met by the target PCB design to maintain optimal heat dissipation during operation.

Selection Notes

Select this component for applications requiring a cost-effective, high-performance Class-D solution with integrated modulation. Consider the fixed 5 V logic supply requirement and the need for external feedback resistors to set the modulator gain. Evaluate the thermal management capabilities of the system, as the device provides active error reporting for temperature and current limits.

Part Context

This part belongs to the Analog Devices AD1990 family of switching audio amplifiers. It utilizes a low-cost DMOS process technology to integrate both the modulator and the power output stage into a single chip. The device is designed to replace traditional linear amplifiers in portable and space-constrained audio systems where efficiency and size are critical factors.

Replacement Considerations

Consult official Analog Devices documentation for confirmed substitute part numbers within the AD199x family or other compatible switching amplifier series.