DS4420N+

Overview

The DS4420N+ is a fully differential, I2C programmable-gain amplifier designed for audio applications. It operates from a single 5V supply within a voltage range of +4.5V to +5.5V and functions across a temperature range of -20°C to +70°C. The device features a gain range from -35dB to +25dB, adjustable in 3dB increments via an I2C interface. It includes differential inputs and outputs, low output noise, and supports up to eight devices on a common bus using three address pins. The component is housed in a 14-pin TDFN package measuring 3mm x 3mm.

Feature Summary

• Fully differential architecture with dedicated differential input and output terminals
• I2C serial interface controls gain, mute, and standby modes through a single control register
• Programmable gain range spanning -35dB to +25dB with 3dB step adjustments
• Supports multiple units on a shared bus via configurable address pins A0, A1, and A2

Applications

• Telephone headsets
• Audio volume control systems
• Microphone gain control circuits

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the selected variant matches the required operating temperature range and electrical characteristics defined in the official datasheet before finalizing procurement.

Selection Notes

Select this component when a fully differential programmable gain amplifier is required for audio signal paths. It is suitable for designs needing precise gain adjustment via digital interfaces without external resistors. Consider the 50Ω load driving capability and low distortion characteristics for high-fidelity audio applications. Verify that the system can accommodate the required I2C bus addressing and power supply decoupling constraints.

Part Context

The DS4420 is part of Maxim Integrated's portfolio of audio interface components. It serves as a specialized solution for managing audio signal levels in portable and stationary audio equipment. The device integrates gain control, mute, and standby functions into a compact surface-mount package, simplifying circuit design compared to discrete resistor networks.

Replacement Considerations

Consult the manufacturer's official cross-reference documentation for verified substitute part numbers. Do not assume functional equivalence based on pinout alone; verify electrical parameters and interface compatibility.