MAX9810 Datasheet | Maxim Integrated

19-2515; Rev 0; 7/02 Electret Condenser Microphone Cartridge Preamplifier .. General Description Features o Replaces FET in Electret Condenser Microphone o 2.3V to 5.5V Single-Supply Operation o Low-Impedance Output (<0.4Ω) o High PSRR: 82dB o Three High-Gain Options: MAX9810A: 24dB MAX9810B: 27dB MAX9810C: 30dB o Internal Bias Voltage o Low Supply Current (670µA) o Rail-to-Rail® Output o No Output Phase Reversal During Overload Conditions o Available in a Tiny 4-Bump UCSP 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 ponents 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 670µA 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 es in a tiny 4-bump chip-scale package (UCSP™) that is designed to fit inside the ECM cartridge. Ordering Information PART MAX9810AEBS-T MAX9810BEBS-T MAX9810CEBS-T TEMP RANGE -40oC to +85oC -40oC to +85oC -40 C to +85 C o...