Key facts
- Brand
- Maxim
- Model
- MAX9814
- Category
- audio amplifier
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-07
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Maxim MAX9814 Microphone Amplifier Datasheet
The MAX9814 microphone amplifier provides automatic gain control (AGC) and a low‑noise microphone bias suitable for most electret microphones. It includes a fixed‑gain preamplifier, a variable‑gain amplifier (VGA) with three selectable gain settings (40 dB, 50 dB, 60 dB), and an output amplifier with programmable gain.
The device operates from a 2.7 V to 5.5 V supply, supports a temperature range of –40 °C to +85 °C, and offers features such as low‑power shutdown mode, programmable attack/release times, and a 2 V internal microphone bias. Pin‑out and package information are provided for the 14‑pin TDFN package.
Maxim MAX9814 specifications
| Supply Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Gain Settings | 40 dB, 50 dB, 60 dB |
| Total Harmonic Distortion (THD) | 0.04 % typ |
| Microphone Bias Voltage | 2 V |
| Operating Temperature Range | –40 °C to +85 °C |
| AGC Hold Time | 30 ms (fixed) |
All Maxim MAX9814 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the supply voltage range for the MAX9814?
The device operates from 2.7 V to 5.5 V.
How many gain settings does the MAX9814 provide?
It offers three selectable gain settings: 40 dB, 50 dB, and 60 dB.
What supply voltage range does the MAX9814 support?
The device operates from 2.7 V to 5.5 V.
How are the AGC attack and release times set?
They are set by the external timing capacitor CcT and the tri‑level A/R input that selects the attack‑to‑release ratio.