onsemi FAN3852 Microphone Pre-Amp with Digital Output
onsemi FAN3852 Microphone Pre-Amp with digital output is a single-chip solution that combines a pre-amplifier, a Low Dropout (LDO) regulator, and an Analog-to-Digital Converter (ADC). The FAN3852 is designed to convert Electret Condenser Microphone (ECM) output to a digital Pulse Density Modulation (PDM) data stream. The pre-amplifier accepts analog signals from the ECM, drives an over-sampled sigma-delta ADC, and outputs PDM data. The PDM digital audio has the advantage of noise rejection and is easy to interface with 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.
The FAN3852 is available in a compact 6-bump wafer-level chip scale package, ideal for space-constrained mobile applications.
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
- 420µA typical supply current
- 1.64V to 3.63V supply voltage range, 1.8V typical
- 62dB (A) Signal-to-Noise Ratio (SNR) for 16dB gain
- 0.02% Total Harmonic Distortion (THD)
- 1MHz to 4MHz input clock frequency range
- Integrated Low Drop-Out (LDO) regulator
- 1.5kV Human Body Model (HBM) Electrostatic Discharge (ESD) on MIC input
- -40°C to +85°C operating temperature range
- WLCSP-6 package type
- 1.242mm × 0.842mm package dimensions, 0.400mm pitch
Applications
- Electret condenser microphones with digital output
- Mobile handsets
- Headset mic
- Personal computers
Mono Application Circuit
Stereo Application Circuit
Mic Element Drawing
Published: 2019-03-01
| Updated: 2025-05-21