MAX9810BEBS+T Maxim Integrated, MAX9810BEBS+T Datasheet

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MAX9810BEBS+T

Manufacturer Part Number
MAX9810BEBS+T
Description
Microphone Preamplifiers
Manufacturer
Maxim Integrated
Datasheet
1.MAX9810CEBST.pdf (9 pages)

Specifications of MAX9810BEBS+T

Rohs
yes
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
4 UCSP-4
4 UCSP-4
4 UCSP-4
V
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
AFU
AFS
AFT
1

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MAX9810BEBS+T Summary of contents

Page 1

... MIC GND ECM CARTRIDGE Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. USCP is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 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. o Replaces FET in Electret Condenser Microphone o 2.3V to 5.5V Single-Supply Operation o Low-Impedance Output (< ...

Page 2

Electret Condenser Microphone Cartridge Preamplifier ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD All Other Pins to GND.................................-0. Continuous Current (IN, OUT) ..........................................±20mA Output Short-Circuit Duration (to GND or V Continuous Power Dissipation (T = +70°C) ...

Page 3

Electret Condenser Microphone Cartridge AC ELECTRICAL CHARACTERISTICS (V = 3V, GND = 10kΩ connected to 1.5V otherwise noted. Typical values are at T PARAMETER SYMBOL Small-Signal -3dB Bandwidth Slew Rate Settling Time to 0.1% ...

Page 4

Electret Condenser Microphone Cartridge Preamplifier (V = 3V, GND = 10kΩ connected to 1.5V noted.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 100 ...

Page 5

Electret Condenser Microphone Cartridge (V = 3V, GND = 10kΩ connected to 1.5V noted.) 1kHz REJECTION vs. SWEPT AC SIGNAL ON POWER SUPPLY 90 0.1µF BYPASS CAPACITOR 80 1nF BYPASS CAPACITOR ...

Page 6

Electret Condenser Microphone Cartridge Preamplifier (V = 3V, GND = 10kΩ connected to 1.5V noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 685 MAX9810C 680 675 MAX9810B 670 665 MAX9810A 660 655 2.0 2.5 3.0 3.5 ...

Page 7

Electret Condenser Microphone Cartridge Pin Description BUMP NAME DESCRIPTION A1 V Amplifier Power Supply DD A2 OUT Amplifier Output B1 IN Amplifier Input B2 GND Ground Detailed Description The MAX9810 replaces the FET commonly used in ECMs with a high-gain, ...

Page 8

Electret Condenser Microphone Cartridge Preamplifier +V S FET IMPEDANCE PREAMPLIFIER CONVERTER ELECTRET MIC ECM CARTRIDGE Figure 1. Conventional FET ECM CLIPPING, SYMMETRICAL RAIL-TO-RAIL OPERATION OUTPUT SIGNAL CLIPS ON THE NEGATIVE RAIL ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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