Part # MAX9814 datasheet

Part Manufacturer: Maxim


Part Description: MAX9814 DS

Part Details:

19-0764; Rev 0; 3/07 EVALUATION KIT AVAILABLE Microphone Amplifier with AGC and Low-Noise Microphone Bias MAX9814 General Description Features The MAX9814 is a low-cost, high-quality microphone o Automatic Gain Control (AGC) amplifier with automatic gain control (AGC) and low-noise microphone bias. The device features a low-noise o Three Gain Settings (40dB, 50dB, 60dB) preamplifier, variable gain amplifier (VGA), output o Programmable Attack Time amplifier, microphone-bias-voltage generator and AGCcontrol circuitry. o Programmable Attack and Release Ratio The low-noise preamplifier has a fixed 12dB gain, while o 2.7V to 5.5V Supply Voltage Range the VGA gain automatically adjusts from 20dB to 0dB,depending on the output voltage and the AGC thresh- o Low Input-Referred Noise Density of 30nV/Hz old. The output amplifier offers selectable gains of 8dB, o Low THD: 0.04% (typ) 18dB, and 28dB. With no compression, the cascade ofthe amplifiers results in an overall gain of 40dB, 50dB, o Low-Power Shutdown Mode or 60dB. A trilevel digital input programs the output o Internal Low-Noise Microphone Bias, 2V amplifier gain. An external resistive divider controls theAGC threshold and a single capacitor programs the o Available in the Space-Saving 12-Bump UCSP attack/release times. A trilevel digital input programs (1.5mm x 2mm) and 14-Pin TDFN (3mm x 3mm) the ratio of attack-to-release time. The hold time of the Packages AGC is fixed at 30ms. The low-noise microphone-bias-voltage generator can bias most electret microphones. o -40°C to +85°C Extended Temperature Range The MAX9814 is available in the space-saving 12-bumpUCSPTM (1.5mm x 2mm) and 14-pin TDFN packages. Ordering Information This device is specified over the -40°C to +85°Cextended temperature range. PIN- PKG PART TEMP RANGE PACKAGE CODE Applications MAX9814EBC+T -40°C to +85°C 12 UCSP-12 B12-3 Digital Still Cameras Two-Way Communicators MAX9814ETD+T -40°C to +85°C 14 TDFN-14 T1433-2 Digital Video Cameras

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MAX9814.pdf Datasheet