MAX9814 Microphone Amplifier With AGC And Low-Noise Microphone Bias

The MAX9814 is a low-cost, high-quality Microphone Amplifier with automati 646 c gain control (AGC) and low-noise Microphone bias. The device features a low-noise preamplifier, Variable Gain Amplifier (VGA), output Amplifier microphone-bias-voltage generator and AGC control circuitry.
The low-noise preamplifier has a fixed 12dB gain, while the VGA gain automatically adjusts from 20dB to 0dB, depending on the output voltage and the AGC threshold. The output Amplifier offers selectable gains of 8dB, 18dB, and 28dB. With no compression, the cascade of the Amplifiers results in an overall gain of 40dB, 50dB, or 60dB. A trilevel digital input programs the output Amplifier gain. An external resistive divider controls the AGC threshold and a single capacitor programs the attack/release times. A trilevel digital input programs the ratio of attack-to-release time. The hold time of the AGC is fixed at 30ms. The low-noise microphone-bias-voltage generator CAN bias most electret Microphones
The MAX9814 is available in the space-saving 12-bump UCSP" (1.5mm x 2mm) and 14-pin TDFN packages. This device is specified over the -40C to +85C extended temperature range.
By Maxim Integrated Products
MAX9814 's PackagesMAX9814 's pdf datasheet
MAX9814ETDT QFN
MAX9814ETD QFN




MAX9814 Pinout, Pinouts
MAX9814 pinout,Pin out
This is one package pinout of MAX9814,If you need more pinouts please download MAX9814's pdf datasheet.

MAX9814 Application circuits
MAX9814 circuits
This is one application circuit of MAX9814,If you need more circuits,please download MAX9814's pdf datasheet.


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