FAN3850TUC15X35
FAN3850TUC15X35 Datasheet
FAN3850T Microphone Pre-Amplifier with Temperature Compensation and Digital Output
| Part | Datasheet |
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FAN3850TUC15X35 |
FAN3850TUC15X35 (pdf) |
| Related Parts | Information |
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FAN3850TUC13X35 |
FAN3850TUC13X35 |
| PDF Datasheet Preview |
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| FAN3850T Microphone Pre-Amplifier with Temperature Compensation and Digital Output March 2012 FAN3850T Microphone Pre-Amplifier with Temperature Compensation and Digital Output • Optimized for Mobile Handset and Notebook PC Microphone Applications • Accepts Input from Electret Condenser Microphones • Pulse Density Modulation PDM Output • Standard 5-Wire Digital Interface • Amplifier Gain 15.7dB or 13.7dB • Negative Temperature Coefficient to Compensate for ECM Positive Temperature Coefficient • Low Input Capacitance, High PSR, 20kHz Pre-Amplifier • Low-Power, 1.5µA Sleep Mode • Typical 420µA Supply Current • Signal to Noise Ratio of 62.4dB A • 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 • Electret Condenser Microphones with Digital Output • Mobile Handsets • Headset Accessories • Personal Computers PC The FAN3850T integrates a pre-amplifier, LDO, and Analog-to-Digital Converter ADC to convert Electret Condenser Microphone ECM outputs to digital Pulse Density Modulation PDM data streams. The preamplifier accepts analog signals from the ECM and drives an over-sampled sigma delta ADC and outputs PDM data. The PDM digital audio has the advantage of noise rejection and interface-to-mobile handset processors. The FAN3850T is powered from the system supply rails up to 3.63V, with a low power consumption of only 0.85mW, and less than 20uW in Power-Down Mode. The device compensates for the temperature variation of the microphone element to achieve a flat sensitivity response over-temperature. Sleep Mode Ctrl INPUT Pre-Amp Figure Block Diagram CLOCK DATA SELECT Ordering Information FAN3850TUC15X35 FAN3850TUC13X35 Gain Option 15.7dB 13.7dB Operating Temperature Range Package -30°C to +85°C 6-Ball, Wafer-Level Chip-Scale Package WLCSP Packing Method 3000 Unit Tape & Reel Note Alternate gain options and temperature coefficient slopes are possible. Please contact a Fairchild representative. FAN3850T Microphone Pre-Amplifier with Temperature Compensation and Digital Output Pin Configuration Figure Pin Configuration Top View 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 2011 Fairchild Semiconductor Corporation FAN3850T Microphone Pre-Amplifier with Temperature Compensation and 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. Parameter Min. Max. Unit VDD VIO DC Supply Voltage Analog and Digital I/O Human Body Model, JESD22-A114 2 , All Pins Except Microphone Input Human Body Model, JESD22-A114 2 , Microphone Input VCC+0.3 ±300 Note This device is fabricated using CMOS technology and is therefore susceptible to damage from electrostatic discharges. Appropriate precautions must be taken during handling and storage of this device to prevent exposure to ESD. |
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