MAX9810 Maxim Integrated Products, MAX9810 Datasheet
MAX9810
Manufacturer Part Number
MAX9810
Description
Electret Condenser Microphone Cartridge Preamplifier
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX9810.pdf
(9 pages)
www.datasheet4u.com
The MAX9810 microphone preamplifier is intended for
use inside electret condenser microphone (ECM) car-
tridges. 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 sup-
ply 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 comes in a tiny 4-bump chip-scale package
(UCSP™) that is designed to fit inside the ECM cartridge.
Electret Condenser Microphone Cartridges In:
19-2515; Rev 0; 7/02
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
USCP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Cell Phones
Notebooks
PDAs
Portable Audio
ELECTRET
MIC
Typical Application Circuit
Electret Condenser Microphone Cartridge
________________________________________________________________ Maxim Integrated Products
ECM CARTRIDGE
MAX9810
GND
General Description
Functional Diagram/
V
DD
Applications
POWER
OUTPUT
GND
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:
o Internal Bias Voltage
o Low Supply Current (670µA)
o Rail-to-Rail
o No Output Phase Reversal During Overload
o Available in a Tiny 4-Bump UCSP
MAX9810AEBS-T
MAX9810BEBS-T
MAX9810CEBS-T
MAX9810AEBS-T
MAX9810BEBS-T
MAX9810CEBS-T
Conditions
MAX9810A: 24dB
MAX9810B: 27dB
MAX9810C: 30dB
(BUMP SIDE DOWN)
PART
PART
TOP VIEW
®
Output
A
B
TEMP RANGE
-40
-40
-40
BUMP-PACKAGE
o
o
o
Ordering Information
C to +85
C to +85
C to +85
V
4 UCSP-4
4 UCSP-4
4 UCSP-4
IN
1
DD
Preamplifier
MAX9810
UCSP
Pin Configuration
o
o
o
C
C
C
Selector Guide
GND
OUT
2
PACKAGE
4 UCSP-4
4 UCSP-4
4 UCSP-4
BUMP-
Features
GAIN
(dB)
24
27
30
MARK
TOP
AFS
AFU
AFT
1
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