Fairchild FAN3850 Microphone Pre-Amplifiers

Fairchild's FAN3850 integrates a Pre-Amplifier, LDO, and Analog-to-Digital Converter (ADC) to convert Electret Condenser Microphone (ECM) outputs to Pulse Density Modulation (PDM) data streams. The FAN3850 Microphone Pre-Amplifier accepts analog signals from the ECM and drives an over-sampled sigma-delta ADC and outputs PDM data. The PDM digital audio of the Fairchild FAN3850 Microphone Pre-Amplifier has the advantage of noise rejection and interface-to-mobile handset processors. Typical applications for these FAN3850 Microphone Pre-Amplifiers include electret condenser microphones with digital output, mobile handsets, handset accessories and personal computers.

Features

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, 20kHz Pre-Amplifier
Low-Power, 1.5µA Sleep Mode
Input Clock Frequency Range of 1-4MHz
Integrated Low Drop-Out Regulator (LDO)
Small 1.26mm x 0.86mm 6-Ball WLCSP Package

Applications

Electret Condenser Microphones with Digital Output
Mobile Handset
Handset Accessories
Personal Computer (PC)

Part Number	Package	Supply Current (Typ)(µA)	Gain Option (dB)	SNR (dB/A)	Harmonic Distortion (%)	Datasheet


FAN3850AUC16X	WLCSP-6	470	16	62	0.02
FAN3850AUC19X	WLCSP-6	470	19	61	0.02
FAN3850TUC15X35	WLCSP-6	420	15.7	62.4	0.01