MAX9814ETD+T Maxim Integrated Products, MAX9814ETD+T Datasheet - Page 6

• Manufacturer Part Number: MAX9814ETD+T
• Description: IC AMP AUDIO MONO AB MIC 14TDFN
• Manufacturer: Maxim Integrated Products
• Type: Class ABr

Specifications of MAX9814ETD+T

• Output Type: 1-Channel (Mono)
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: AGC, Microphone, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 14-TDFN Exposed Pad
• Product: General Purpose Audio Amplifiers
• Thd Plus Noise: 0.04 %
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 3.1 mA
• Maximum Power Dissipation: 1481 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Amplifier Class: AB
• No. Of Channels: 1
• Supply Voltage Range: 2.7V To 5.5V
• Load Impedance: 50ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: TDFN
• No. Of Pins: 14
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Max Output Power X Channels @ Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MAX9814ETD+T; MAX9814ETD+TTR

Microphone Amplifier with AGC and
Low-Noise Microphone Bias
6
(V
T
A
DD
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
TDFN
= 5V, C
4, 11
500mV/div
PIN
10
12
13
14
—
V
1
2
3
5
6
7
8
9
MICOUT
0V
CT
= 470nF, C
MICBIAS
MICOUT
HOLD AND RELEASE TIME
NAME
MICIN
SHDN
GAIN
GND
BIAS
N.C.
V
A/R
CG
CT
TH
EP
DD
CG
40ms/div
= 2.2µF, V
Timing Capacitor Connection. Connect a capacitor to CT to control the Attack and Release times
of the AGC.
Active-Low Shutdown Control
Amplifier DC Offset Adjust. Connect a 2.2µF capacitor to GND to ensure zero offset at the output.
No Connection. Connect to GND.
Power Supply. Bypass to GND with a 1µF capacitor.
Amplifier Output
Ground
Microphone Noninverting Input
Tri-Level Attack and Release Ratio Select. Controls the ratio of attack time to release time for the
AGC circuit.
A/R = GND: Attack/Release Ratio is 1:500
A/R = V
A/R = Unconnected: Attack/Release Ratio is 1:4000
Tri-Level Amplifier Gain Control.
GAIN = V
GAIN = GND, gain set to 50dB.
GAIN = Unconnected, uncompressed gain set to 60dB.
Amplifier Bias. Bypass to GND with a 0.47µF capacitor.
Microphone Bias Output
AGC Threshold Control. TH voltage sets gain control threshold. Connect TH to MICBIAS to disable
the AGC.
Exposed Pad. Connect the TDFN EP to GND.
C
A/R = V
CT
TH
DD
= 47nF
DD
: Attack/Release Ratio is 1:2000
= V
DD
, gain set to 40dB.
MICBIAS
Typical Operating Characteristics (continued)
x 0.4, GAIN = V
DD
(40dB), AGC disabled, no load, R
FUNCTION
500mV/div
V
MICOUT
0V
HOLD AND RELEASE TIME
100ms/div
Pin Description
C
A/R = UNCONNECTED
CT
= 47nF
L
= 10kΩ, C
OUT
= 1µF,