Microphone Pre-Amplifier with Digital Output

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Overview

The FAN3852 integrates a pre-amplifier, LDO, and ADC that converts Electret Condenser Microphone (ECM) outputs to digital Pulse Density Modulation (PDM) data streams. The pre-amplifier accepts analog signals from the ECM and drives an over-sampled sigma delta Analog-to-Digital Converter (ADC) and outputs PDM data. The PDM digital audio has the advantage of noise rejection and easy interface to mobile handset processors.The FAN3852 features an integrated LDO and is powered from the system supply rails up to 3.63V, with low power consumption of only 0.85mW and less than 20µW in Power-Down Mode.

  • Computing
  • Consumer
  • Electret Condenser Microphones with Digital Output
  • Mobile Handset
  • Headset Accessories
  • Personal Computer (PC)
  • Optimized for Mobile Handset and Notebook PC Microphone Applications
  • Accepts Input from Electret Condenser Microphones (ECM)
  • Pulse Density Modulation (PDM) Output
  • Standard 5-Wire Digital Interface
  • Low Input Capacitance, High PSR, 20 kHz Pre-Amplifier
  • Low-Power 1.5µA Sleep Mode
  • Typical 420µA Supply Current
  • SNR of 62dB(A) for 16dB Gain
  • Total Harmonic Distortion 0.02%
  • Input Clock Frequency Range of 1-4MHz
  • Integrated Low Drop-Out Regulator (LDO)
  • 1.5kV HBM ESD on MIC Input

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FAN3852UC16X

Active

Pb

A

H

P

WLCSP-6

1

260

REEL

3000

Y

Digital Audio Interface Receiver

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$0.2293

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