MAX9814ETD+T by Analog Devices

Microphone Amplifier with AGC and Low-Noise Microphone Bias


The MAX9814 is a low-cost, high-quality microphone amplifier with automatic 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, 14-pin TDFN package. This device is specified over the -40°C to +85°C extended temperature range.

Where to Buy

Prices starting from US$0.97

Distributor Stock
Logo for Farnell
Farnell
from US$0.97
6,220
in stock
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Logo for Newark Electronics
Newark Electronics
from US$1.12
6,386
in stock
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Logo for element14
element14
from US$1.02
6,220
in stock
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Logo for Analog Devices
Analog Devices
from US$1.12
1,979
in stock
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Features

Automatic Gain Control (AGC)
Three Gain Settings (40dB, 50dB, 60dB)
Programmable Attack Time
Programmable Attack and Release Ratio
2.7V to 5.5V Supply Voltage Range
Low Input-Referred Noise Density of 30nV/
Low THD: 0.04% (typ)
Low-Power Shutdown Mode
Internal Low-Noise Microphone Bias, 2V
Available in the Space-Saving, 14-Pin TDFN (3mm × 3mm) Package
-40°C to +85°C Extended Temperature Range

Specifications

# Channels 1
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
IQ (mA) (typ) 3.1
THD+N (%) 0.04
en (nV/√Hz) 30
PSRR (dB) (min) 55
Input Type Single Ended
Package/Pins TDFN/14
BudgetaryPrice (See Notes) 0.77


MAX9814ETD+T Semiconductors - ICs by Analog Devices

IC MICROPHONE AMP AGC 14TDFN

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Driver Configuration -
Peak Output Current -
Supply Voltage Min 2.7V
Supply Voltage Max 5.5V
Driver Case Style -
No. of Pins 14Pins
Input Delay -
Output Delay -
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Amplifer Supply Voltage 2.7V to 5.5V
Amplifier Case Style TDFN
Amplifier Class AB
Base Number 9814
Load Impedance 50ohm
Load Impedance Min 500ohm
No. of Channels 1Channels
Operating Temperature Range -40°C to +85°C
Output Power (Pout) -000mW
Supply Voltage Range 2.7V to 5.5V
THD + N 0.04% @ 10kohm VDD=3.3V
Termination Type Surface Mount Device

Alternative Descriptions

Audio Amplifier, 2.7V To 5.5, Tdfn-Ep | Newark Electronics
AUDIO AMPLIFIER, 2.7V TO 5.5, TDFN-EP | element14
Microphone Amplifier with AGC | Analog Devices

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX9814ETD+T ?

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Is the MAX9814ETD+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX9814ETD+T have stock available?

Authorised distributors including Newark Electronics, element14, Farnell and Analog Devices have stock available or on a lead time for MAX9814ETD+T .

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