FAN3850AUC19X05

Overview

The FAN3850AUC19X is a microphone pre-amplifier with digital output, optimized for mobile handset and notebook PC applications. It accepts input from Electret Condenser Microphones (ECM) and converts analog signals to Pulse Density Modulation (PDM) data streams via an integrated sigma-delta ADC. The device features a standard 5-wire digital interface, low-power sleep mode, and an integrated LDO regulator. Operating on a supply voltage of 1.64V to 3.63V, it delivers a signal-to-noise ratio of 61dB(A) at 19dB gain. The component is housed in a compact 6-ball WLCSP package measuring 1.26mm x 0.86mm.

Feature Summary

• Integrates a pre-amplifier, LDO, and ADC to convert ECM analog outputs directly to PDM digital data streams.
• Features a standard 5-wire digital interface compatible with mobile handset processors for easy integration.
• Includes a low-power 1.5μA sleep mode and typical 470μA supply current for efficient power management.
• Provides high performance with 61dB(A) SNR and 0.02% THD while maintaining low input capacitance.

Applications

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

Procurement Notes

Verify the specific suffix '19X' indicates the 19dB gain version when ordering. Confirm the operating temperature range of -30°C to +85°C matches your environmental requirements. Ensure the 6-ball WLCSP package dimensions align with your PCB layout constraints. Check for RoHS compliance status as per the manufacturer's documentation.

Selection Notes

Select this component for applications requiring direct digital audio output from microphones without external ADCs. Choose the 19dB gain variant if higher sensitivity is needed compared to the 16dB option. Consider the small footprint for space-constrained designs like mobile handsets. Verify compatibility with the host processor's PDM interface timing specifications.

Part Context

The FAN3850A series integrates pre-amplification and analog-to-digital conversion into a single chip. This consolidation reduces the bill of materials and simplifies board layout by eliminating the need for separate analog amplifiers and ADCs. The device is designed specifically for portable electronics where size and power consumption are critical factors.

Replacement Considerations

The FAN3850AUC16X is a verified alternative within the same family, offering a 16dB gain configuration instead of 19dB. Both share identical pinouts, packages, and electrical characteristics except for the gain setting. Verify that the system design can accommodate the slight difference in signal amplification levels.

FAQ

What type of microphone input does the FAN3850A support?

The device is designed to accept input from Electret Condenser Microphones (ECM).

How is the digital audio data output formatted?

The device outputs Pulse Density Modulation (PDM) data streams through a standard 5-wire digital interface.

What is the power consumption in sleep mode?

The FAN3850A features a low-power sleep mode with a typical current consumption of 1.5μA.