MAX4062
Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown
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Overview
Features and Benefits
- 2.4V to 5.5V Single-Supply Operation
- Adjustable Gain or Fixed-Gain Options
- High PSRR (86dB at 1kHz)
- High CMRR (70dB at 1kHz)
- Low Input-Referred Noise
- Integrated Microphone Bias
- 750µA Supply Current
- 0.3µA Shutdown Current
- ±4kV ESD Protection (AUX_IN)
- Rail-to-Rail Outputs
- THD+N: 0.04% at 1kHz
- Available in Space-Saving Packages
- 8-Pin TDFN (MAX4060/MAX4061)
- 8-Pin µMAX (MAX4060/MAX4061)
- 10-Pin µMAX (MAX4062)
Product Details
The MAX4060/MAX4061/MAX4062 are differential-input microphone preamplifiers optimized for notebook and PDA audio systems. These devices feature adjustable gain with excellent power-supply rejection and common-mode rejection ratios, making them ideal for low-noise applications in portable audio systems.
The MAX4060/MAX4062 are capable of switching their output between the differential input and a single-ended auxiliary microphone amplifier input. In addition, the MAX4060/MAX4062 have a low-noise microphone bias generator. The differential gain of the MAX4061/MAX4062 is set with a single resistor. The MAX4060 has a fixed gain of 10V/V and is PC99/2001 compliant. The MAX4061 includes a complete shutdown mode. In shutdown, the supply current is reduced to 0.3µA and the current to the microphone bias is cut off for ultimate power savings.
The MAX4060 operates from a 4.5V to 5.5V single supply and the MAX4061/MAX4062 operate from 2.4V to 5.5V. All devices are specified over the extended operating temperature range, -40°C to +85°C. The MAX4060/MAX4061 are available in tiny 8-pin TDFN (3mm x 3mm x 0.8mm) and 8-pin µMAX® packages. The MAX4062 is available in a 10-pin µMAX package.
Applications
- AES-42 Compliant Microphones
- Notebook Audio Systems
- PDA Audio Systems
- Signal Conditioning
- Tablet PCs
- USB Audio Peripherals
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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