FAN3850AUC19X05

FAN3850AUC19X05 Datasheet

FAN3850A Microphone Pre-Amplifier with Digital Output

Part	Datasheet
FAN3850AUC19X05	FAN3850AUC19X05 (pdf)

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FAN3850A Microphone Pre-Amplifier with Digital Output July 2011 FAN3850A Microphone Pre-Amplifier with Digital Output 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 16dB and 19dB Gain Versions Available 1 Low Input Capacitance, High PSR, 20kHz Pre-Amplifier Low-Power 1.5uA Sleep Mode Typical 470uA Supply Current SNR of 62/61dB A for 16/19dB Gain Respectively Total Harmonic Distortion Input Clock Frequency Range of 1-4MHz Integrated Low Drop-Out Regulator LDO Small 1.26mm x 0.86mm 6-Ball WLCSP Package The FAN3850A 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 FAN3850A 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 in Power-Down Mode. Electret Condenser Microphones with Digital Output Mobile Handset Headset Accessories Personal Computer PC Ordering Information FAN3850AUC16X FAN3850AUC19X Operating Temperature Range -30°C to +85°C -30°C to +85°C Package Packing Method 6 Ball, Wafer-Level Chip-Scale Package WLCSP 6-Ball, Wafer-Level Chip-Scale Package WLCSP 3000 Units on Tape & Reel 3000 Units on Tape & Reel Note Alternate gain options are possible. Please contact Fairchild. FAN3850A Microphone Pre-Amplifier with Digital Output Block Diagram Sleep Mode Ctrl INPUT Pre-Amp Pin Configuration Figure Block Diagram CLOCK DATA SELECT Figure Pin Assignments Pin Definitions Pin# A1 B1 C1 A2 B2 C2 Name CLOCK GND DATA SELECT INPUT VDD Type Input Output Input Clock Input Ground Pin PDM Output 1 Bit ADC Rising or Falling Clock Edge Select Microphone Input Device Power Pin 2010 Fairchild Semiconductor Corporation FAN3850A Microphone Pre-Amplifier with Digital Output Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. VDD VIO Parameter DC Supply Voltage Analog and Digital I/O Human Body Model, JESD22-A114, All Pins Except Microphone Input Human Body Model, JESD22-A114 Microphone Input Min. ±300 Max.

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FAN3850A Microphone Pre-Amplifier with Digital Output

July 2011

FAN3850A Microphone Pre-Amplifier with Digital Output

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 16dB and 19dB Gain Versions Available 1 Low Input Capacitance, High PSR, 20kHz

Pre-Amplifier

Low-Power 1.5uA Sleep Mode Typical 470uA Supply Current SNR of 62/61dB A for 16/19dB Gain Respectively Total Harmonic Distortion Input Clock Frequency Range of 1-4MHz Integrated Low Drop-Out Regulator LDO Small 1.26mm x 0.86mm 6-Ball WLCSP Package

The FAN3850A 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 FAN3850A 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 in Power-Down Mode.

Electret Condenser Microphones with Digital Output Mobile Handset Headset Accessories Personal Computer PC
Ordering Information

FAN3850AUC16X FAN3850AUC19X

Operating Temperature

Range
-30°C to +85°C
-30°C to +85°C

Package

Packing Method
6 Ball, Wafer-Level Chip-Scale Package WLCSP 6-Ball, Wafer-Level Chip-Scale Package WLCSP
3000 Units on Tape & Reel
3000 Units on Tape & Reel

Note Alternate gain options are possible. Please contact Fairchild.

FAN3850A Microphone Pre-Amplifier with Digital Output

Block Diagram

Sleep Mode Ctrl

INPUT

Pre-Amp

Pin Configuration

Figure Block Diagram

CLOCK

DATA SELECT

Figure Pin Assignments

Pin Definitions

Pin#

A1 B1 C1 A2 B2 C2

Name

CLOCK GND DATA

SELECT INPUT VDD

Type

Input Output Input

Clock Input Ground Pin PDM Output 1 Bit ADC Rising or Falling Clock Edge Select Microphone Input Device Power Pin
2010 Fairchild Semiconductor Corporation

FAN3850A Microphone Pre-Amplifier with Digital Output

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.

VDD VIO

Parameter

DC Supply Voltage Analog and Digital I/O Human Body Model, JESD22-A114, All Pins Except Microphone Input Human Body Model, JESD22-A114 Microphone Input

Min.
±300

Max.

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Datasheet ID: FAN3850AUC19X05 513890