MAX4061EUA+

Audio Amplifiers Overview

The MAX4061EUA+ is a differential-input microphone preamplifier from the MAX4060/MAX4061/MAX4062 series, designed for notebook and PDA audio systems. It operates on a single supply voltage ranging from 2.4V to 5.5V with a typical supply current of 750µA. The device features adjustable gain set by an external resistor, high power-supply rejection (86dB at 1kHz), and common-mode rejection (70dB at 1kHz). It includes a complete shutdown mode reducing supply current to 0.3µA. The output is rail-to-rail, and it offers ±4kV ESD protection on the auxiliary input. Available in an 8-pin µMAX package, it functions over an extended temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Differential microphone preamplifier optimized for low-noise portable audio applications
• Adjustable gain via single external resistor with integrated microphone bias generator
• Complete shutdown mode for ultimate power savings with minimal standby current
• High power-supply and common-mode rejection ratios for noisy digital environments

Audio Amplifiers Applications

• Notebook Audio Systems
• Tablet PCs
• PDA Audio Systems
• USB Audio Peripherals
• AES-42-Compliant Microphones

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix matches the required package type and RoHS compliance status. Confirm the operating voltage range aligns with system requirements, as this variant supports 2.4V to 5.5V. Ensure thermal management considerations are addressed for the 8-pin µMAX package during PCB layout. Check for any recent product change notices or end-of-life announcements from Analog Devices before finalizing procurement plans.

Audio Amplifiers Selection Notes

Select the MAX4061EUA+ when adjustable gain is required alongside low-power shutdown capabilities. It is suitable for systems needing operation below 4.5V, unlike the fixed-gain MAX4060. Consider its differential input architecture for improved noise rejection in electrically noisy environments. Verify that the 8-pin µMAX package dimensions fit the available board space constraints.

Audio Amplifiers Part Context

The MAX4061EUA+ belongs to the MAX4060/MAX4061/MAX4062 family of differential microphone preamplifiers. This series is engineered for portable audio devices, offering solutions for both fixed and adjustable gain configurations. The MAX4061 specifically distinguishes itself with a shutdown feature and adjustable gain, catering to battery-powered applications requiring efficient power management and flexible signal conditioning.

Audio Amplifiers Replacement Considerations

The MAX4060EUA+ serves as a replacement if fixed gain is acceptable and shutdown is not needed. The MAX4062EUB+ is an alternative for systems requiring an auxiliary input and 10-pin packaging. Ensure pin compatibility and gain settings match the original design intent when substituting these variants.

Audio Amplifiers FAQ

How is the gain of the MAX4061EUA+ adjusted?

The differential gain is set using a single external resistor connected between the G1 and G2 pins. The gain value can be calculated based on the resistor value, allowing optimization of the system's signal-to-noise ratio.

What is the function of the SHDN pin on the MAX4061EUA+?

The SHDN pin controls the complete shutdown mode. Driving this pin low reduces the supply current to 0.3µA, puts the output in a high-impedance state, and cuts off the microphone bias current for maximum power savings.

Does the MAX4061EUA+ support single-ended microphone inputs?

No, the MAX4061 does not have an auxiliary single-ended input. Only the MAX4060 and MAX4062 variants include an AUX_IN pin for switching between differential and single-ended inputs.