MAX98310EWL+

Audio Amplifiers Overview

The MAX98310EWL+ is a mono 1.4W Class AB audio amplifier from Analog Devices (Maxim Integrated). It operates on a 2.5V to 5.5V supply with a quiescent current of 1.2mA at 3.7V. The device features internally fixed gains of 0dB, 3dB, 6dB, and 9dB, selectable via the GAIN pin. It delivers 750mW into an 8Ω load at 3.7V with 1% THD+N. Key electrical characteristics include a 90dB PSRR at 217Hz, 0.008% THD+N, and a 5ms turn-on time. It utilizes a 9-bump WLP package measuring 1.0mm x 1.0mm.

Audio Amplifiers Feature Summary

• Industry-leading click-and-pop suppression circuitry minimizes audible transients during power-up and shutdown transitions.
• High 90dB Power-Supply Rejection Ratio (PSRR) ensures excellent noise immunity against power rail fluctuations.
• Differential input architecture significantly improves system noise immunity compared to single-ended designs.
• Integrated thermal overload and short-circuit protection safeguards the device under fault conditions.

Audio Amplifiers Applications

• Cell Phones/Smartphones
• Digital Cameras
• Portable Media Players
• e-Readers
• Tablets

Audio Amplifiers Procurement Notes

Verify the component is the lead-free/RoHS-compliant variant indicated by the '+' suffix in the part number. Confirm the package type is the 9-bump Wafer-Level Package (WLP) with 0.3mm pitch. Ensure the temperature range matches the extended specification of -40°C to +85°C for the EWL+ designation.

Audio Amplifiers Selection Notes

Select the MAX98310EWL+ when a fixed gain configuration is required, as opposed to the externally adjustable MAX98309. This model simplifies design by eliminating external gain-setting resistors. It is suitable for space-constrained portable applications requiring low quiescent current and high audio fidelity within a minimal footprint.

Audio Amplifiers Part Context

This component belongs to the MAX98309/MAX98310 family of mono Class AB audio amplifiers. While sharing identical electrical performance and packaging, the MAX98310 differs from the MAX98309 by featuring internally fixed gain options rather than external resistor programming. Both devices share the same 1.0mm x 1.0mm WLP package and protection features.

Audio Amplifiers Replacement Considerations

The MAX98309EWL+ is a direct functional substitute if external gain setting via resistors is acceptable or desired. No other cross-model replacements are confirmed in the provided documentation.

Audio Amplifiers FAQ

How is the gain configured on the MAX98310?

The gain is internally fixed and selected by connecting the GAIN pin to VDD (0dB), GND (3dB), leaving it unconnected (6dB), or connecting it to BIAS (9dB).

What is the purpose of the BIAS pin?

The BIAS pin provides the internally generated common-mode DC bias voltage (VDD/2). It must be bypassed to ground with a capacitor to improve PSRR and enable click-and-pop suppression.

Does the MAX98310 require output coupling capacitors?

No, because it uses a bridge-tied load (BTL) configuration with differential outputs biased at midsupply, there is no net DC voltage across the load, eliminating the need for DC-blocking capacitors.