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Part Number: MAX9810

 

 

 

 

Description: The MAX9810 microphone preamplifier is intended for use inside electret condenser microphone (ECM) car...


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MAX9810 General Description


The MAX9810 microphone preamplifier is intended for use inside electret condenser microphone (ECM) cartridges. Current solutions use a FET as an impedance converter. FETs have limited gain, are susceptible to noise and require additional components external to the ECM cartridge for biasing and amplification. The MAX9810 replaces the FET with a high-gain, high-noise rejection, low-output-impedance amplifier. Designed to be integrated inside the ECM cartridge, the MAX9810 offers a flat frequency response, tightly controlled gain, increased sensitivity, and high-noise rejection greatly simplifying system design. Target applications include ECM cartridges in cell phones, PDAs, notebooks, and other portable audio devices.

The MAX9810 operates from a single 2.3V to 5.5V supply and consumes only 670A of quiescent current. The device features an internally generated 1.5V DC bias,and is available in three internally fixed gain options (24dB, 27dB, and 30dB). The MAX9810 is specified over the extended temperature range (-40°C to +85°C) and comes in a tiny 4-bump chip-scale package (UCSP™) that is designed to fit inside the ECM cartridge.

MAX9810 Maximum Ratings

VDD to GND............................................................-0.3V to +6V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Continuous Current (IN, OUT) .......................................±20mA
Output Short-Circuit Duration (to GND or VDD).........Continuous
Continuous Power Dissipation (TA = +70°C)
4-Bump UCSP (derate 3.0mW°C above +70°C) ......238.8mW
Operating Temperature Range ......................-40°C to +85°C
Junction Temperature...................................................+150°C
Storage Temperature Range .......................-65°C to +150°C
Bump Temperature (soldering) (Note 1)
Infrared (15s) .............................................................+220°C
Vapor Phase (60s) ......................................................+215°C

Note 1: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed.

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

MAX9810 Features

` Replaces FET in Electret Condenser Microphone
` 2.3V to 5.5V Single-Supply Operation
` Low-Impedance Output (<0.4)
` High PSRR: 82dB
` Three High-Gain Options:
   MAX9810A: 24dB
   MAX9810B: 27dB
   MAX9810C: 30dB
` Internal Bias Voltage
` Low Supply Current (670A)
` Rail-to-Rail® Output
` No Output Phase Reversal During Overload Conditions
` Available in a Tiny 4-Bump UCSP

MAX9810 Typical Application

·Electret Condenser Microphone Cartridges In:
                                                                          Cell Phones
                                                                          Notebooks
                                                                          PDAs
                                                                          Portable Audio

MAX9810 datasheet

MAX9810
PDF/DataSheet Download

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