Electret Condenser Microphone Cartridge Preamplifier MAX9810 micr

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Electret Condenser Microphone Cartridge Preamplifier MAX9810 micr

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19-2515; 7/02
Electret Condenser Microphone Cartridge Preamplifier
MAX9810 microphone preamplifier intended inside electret condenser microphone (ECM) cartridges. Current solutions impedance converter. FETs have limited gain, susceptible noise require additional components external cartridge biasing amplification. MAX9810 replaces with high-gain, high-noise rejection, low-output-impedance amplifier. Designed integrated inside cartridge, MAX9810 offers flat frequency response, tightly controlled gain, increased sensitivity, high-noise rejection greatly simplifying system design. Target applications include cartridges cell phones, PDAs, notebooks, other portable audio devices. MAX9810 operates from single 2.3V 5.5V supply consumes only 670µA quiescent current. device features internally generated 1.5V bias, available three internally fixed gain options (24dB, 27dB, 30dB). MAX9810 specified over extended temperature range (-40°C +85°C) comes tiny 4-bump chip-scale package (UCSPTM) that designed inside cartridge.
Features
Replaces Electret Condenser Microphone 2.3V 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 Supply Current (670µA) Rail-to-Rail® Output Output Phase Reversal During Overload Conditions Available Tiny 4-Bump UCSP
MAX9810
Ordering Information
PART MAX9810AEBS-T MAX9810BEBS-T MAX9810CEBS-T TEMP RANGE -40oC +85oC -40oC +85oC
Applications
Electret Condenser Microphone Cartridges Cell Phones Notebooks PDAs Portable Audio
BUMPPACKAGE UCSP-4 UCSP-4 UCSP-4
MARK
Selector Guide
PART BUMP-PACKAGE UCSP-4 UCSP-4 UCSP-4 GAIN (dB)
Functional Diagram/ Typical Application Circuit
POWER
MAX9810AEBS-T MAX9810BEBS-T MAX9810CEBS-T
Configuration
ELECTRET
MAX9810
OUTPUT
VIEW (BUMP SIDE DOWN)
CARTRIDGE
MAX9810
UCSP
Rail-to-Rail registered trademark Nippon Motorola Ltd. USCP trademark Maxim Integrated Products, Inc.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
Electret Condenser Microphone Cartridge Preamplifier MAX9810
ABSOLUTE MAXIMUM RATINGS
.-0.3V Other Pins GND.-0.3V (VDD 0.3V) Continuous Current (IN, OUT) .±20mA Output Short-Circuit Duration VDD).Continuous Continuous Power Dissipation +70°C) 4-Bump UCSP (derate 3.0mW°C above +70°C) .238.8mW Operating Temperature Range .-40°C +85°C Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Bump Temperature (soldering) (Note Infrared (15s) .+220°C Vapor Phase (60s) .+215°C
Note This device constructed using unique packaging techniques that impose limit thermal profile device exposed during board level solder attach rework. This limit permits only solder profiles recommended industry standard specification, JEDEC 020A, paragraph 7.6, Table IR/VPR convection reflow. Preheating required. Hand wave soldering allowed.
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Supply Voltage Range Quiescent Supply Current Output Bias Voltage Input Bias Current Input Resistance Power-Supply Rejection Ratio SYMBOL VBIAS IBIAS PSRR 2.3V 5.5V (Note connected 1.5V Output Voltage Swing High connected 1.5V Output Voltage Swing Output Short-Circuit Current ISCC connected 1.5V connected 1.5V 2.3V MAX9810A Voltage Gain ±20mV MAX9810B MAX9810C CONDITIONS Inferred from PSRR test 2.3V 5.5V MAX9810A MAX9810B MAX9810C (Note 0.025 0.04 0.15 1.48 1.53 1.58 0.015 0.07 0.005 0.045 0.015 0.08 UNITS
Electret Condenser Microphone Cartridge Preamplifier
ELECTRICAL CHARACTERISTICS
(VDD connected 1.5V, 20pF, 30pF connected GND, TMIN TMAX, unless otherwise noted. Typical values +25°C.)
PARAMETER Small-Signal -3dB Bandwidth Slew Rate Settling Time 0.1% Input-Noise Voltage Density SYMBOL BWSS CONDITIONS VOUT 10mVP-P VOUT step VOUT step 10Hz (Note 10Hz Input-Noise Current Density Total Integrated Noise Signal-to-Noise Ratio Output Impedance Power-Supply Rejection Ratio Noise Immunity Total Harmonic Distortion Plus Noise Input Capacitance Turn-On Time ZOUT PSRR 1kHz 10kHz Noise bandwidth 20Hz 7kHz VOUT 2VP-P, noise bandwidth 20Hz 7kHz 1kHz VRIPPLE 100mV, fRIPPLE 1kHz 1GHz-carrier, 1kHz-AM tone 1kHz, VOUT 1VP-P, noise bandwidth 22Hz 22kHz 1kHz 10kHz 0.03 0.02 µVRMS pA/Hz nV/Hz UNITS V/µs
MAX9810
Note Note Note Note
specifications 100% tested +25°C, temperature limits guaranteed design. Guaranteed design. production tested. PSRR input-referred. Noise measurement includes noise contribution internal gain-setting resistors.
Electret Condenser Microphone Cartridge Preamplifier MAX9810
Typical Operating Characteristics
(VDD connected 1.5V, 20pF, 30pF connected GND, +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO FREQUENCY
PSRR (dB) PSRR (dB) 100k FREQUENCY (Hz) VRIPPLE 100mVP-P 100k FREQUENCY (Hz) VRIPPLE 100mVP-P 100k FREQUENCY (Hz) 2.3V VRIPPLE 100mVP-P
MAX9810 toc01
POWER-SUPPLY REJECTION RATIO FREQUENCY
MAX9810 toc02
POWER-SUPPLY REJECTION RATIO FREQUENCY
PSRR (dB)
MAX9810 toc03
MAX9810A GAIN PHASE FREQUENCY
GAIN GAIN (dB) 100k FREQUENCY (Hz) -180 PHASE
MAX9810 toc04
INPUT-NOISE VOLTAGE FREQUENCY
MAX9810 toc05
INPUT-NOISE VOLTAGE FREQUENCY
INPUT-NOISE VOLTAGE (nV/Hz)
MAX9810 toc06
INPUT-NOISE VOLTAGE (nV/Hz) PHASE (DEGREES)
1000
1000
-120
FREQUENCY (Hz) 100k FREQUENCY (Hz) 100k
INPUT-NOISE CURRENT FREQUENCY
MAX9810 toc07
INPUT-NOISE CURRENT FREQUENCY
MAX9810 toc08
SIGNAL-TO-NOISE RATIO SUPPLY VOLTAGE
A-WEIGHTED FILTER 1kHz TONE
MAX9810 toc09
INPUT-NOISE CURRENT (pA/Hz)
INPUT-NOISE CURRENT (pA/Hz)
(dB) FREQUENCY (Hz) 100k
FREQUENCY (Hz) 100k
SUPPLY VOLTAGE
Electret Condenser Microphone Cartridge Preamplifier
Typical Operating Characteristics (continued)
(VDD connected 1.5V, 20pF, 30pF connected GND, +25°C, unless otherwise noted.)
1kHz REJECTION SWEPT SIGNAL POWER SUPPLY
MAX9810 toc10
MAX9810
OUTPUT VOLTAGE HIGH LOAD
-0.05 OUTPUT VOLTAGE HIGH -0.10 -0.15 -0.20 -0.25 -0.30 -0.35 -0.40 -0.45 0.05 0.1k 100k 0.1k 2.3V
MAX9810 toc11
OUTPUT VOLTAGE LOAD
MAX9810 toc12
1kHz AM-SIGNAL REJECTION RATIO (dB) BYPASS CAPACITOR 0.1µF BYPASS CAPACITOR BYPASS CAPACITOR
0.35 0.30 OUTPUT VOLTAGE 0.25 0.20 0.15 0.10
2.3V
1000
100k
CARRIER FREQUENCY (MHz)
LOAD
LOAD
OUTPUT IMPEDANCE FREQUENCY
MAX9810 toc13
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
MAX9810 toc14
TOTAL HARMONIC DISTORTION PLUS NOISE FREQUENCY
20mVRMS 22Hz 22kHz BANDWIDTH
MAX9810 toc15
35mVRMS 22Hz 22kHz BANDWIDTH
OUTPUT IMPEDANCE
0.01
0.01
100k FREQUENCY (Hz)
0.001 FREQUENCY (Hz) 100k
0.001 FREQUENCY (Hz) 100k
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT VOLTAGE
MAX9810 toc16
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT VOLTAGE
MAX9810 toc17
TOTAL HARMONIC DISTORTION PLUS NOISE OUTPUT VOLTAGE
2.3V 1kHz
MAX9810 toc18
1kHz
1kHz
0.01
0.001 0.25 0.50 0.75 1.00 1.25 1.50 OUTPUT VOLTAGE (VRMS)
0.01 OUTPUT VOLTAGE (VRMS)
0.01 OUTPUT VOLTAGE (VRMS)
Electret Condenser Microphone Cartridge Preamplifier MAX9810
Typical Operating Characteristics (continued)
(VDD connected 1.5V, 20pF, 30pF connected GND, +25°C, unless otherwise noted.)
SUPPLY CURRENT SUPPLY VOLTAGE
MAX9810 toc19
SUPPLY CURRENT TEMPERATURE
MAX9810 toc20
OUTPUT BIAS VOLTAGE SUPPLY VOLTAGE
MAX9810C 1.575 OUTPUT BIAS VOLTAGE 1.550 MAX9810B 1.525 1.500 MAX9810A 1.475 1.450
MAX9810 toc21
MAX9810C SUPPLY CURRENT (µA) MAX9810B MAX9810A
SUPPLY CURRENT (µA) MAX9810A MAX9810B MAX9810C
1.600
SUPPLY VOLTAGE
SUPPLY VOLTAGE
TEMPERATURE (°C)
OUTPUT BIAS VOLTAGE TEMPERATURE
MAX9810 toc22
SMALL-SIGNAL PULSE RESPONSE 10kHz
MAX9810 toc23
LARGE-SIGNAL PULSE RESPONSE 10kHz
MAX9810 toc24
1.65 MAX9810C
OUTPUT BIAS VOLTAGE
1.60
INPUT 2.5mV/div
INPUT 25mV/div
1.55
MAX9810B
1.50
MAX9810A OUTPUT 100mV/div OUTPUT 1V/div
1.45
1.40 10µs/div 10µs/div TEMPERATURE (°C)
POWER-UP WAVEFORM
MAX9810 toc25
DRIVING MAXIMUM CAPACITIVE LOAD WAVEFORM
MAX9810 toc26
150pF 1V/div OUTPUT 100mV/div
OUTPUT 500mV/div
INPUT 10mV/div
5µs/div
10µs/div
Electret Condenser Microphone Cartridge Preamplifier
Description
BUMP NAME DESCRIPTION Amplifier Power Supply Amplifier Output Amplifier Input Ground
Applications Information
Noise Rejection
MAX9810 features excellent rejection common cellular-phone operating frequencies. Figure shows modulation products high-frequency signal coupling into device power supply, while device driven with 1kHz input. 1GHz, MAX9810 exhibits 82dB rejection.
MAX9810
Detailed Description
MAX9810 replaces commonly used ECMs with high-gain, low-noise, low-output-impedance amplifier, offering improved performance over traditional solution. MAX9810 features high PSRR (82dB 1kHz), available three gain options (24dB, 27dB, 30dB). ECMs with impedance converters require additional amplification (Figure high gain MAX9810 eliminates need external preamplifier, allowing cartridge directly connected front-end devices such CODECs ADCs (Figure MAX9810 also features excellent immunity (see Noise Rejection section).
Supply Bypassing
Unlike FETs, MAX9810 requires separate power source (Figures must connected 2.3V 5.5V power supply external cartridge, thus MAX9810 solution requires three electrical connections instead commonly found current solutions. optimum performance, bypass MAX9810 close device possible (inside cartridge). This yields best rejection PSRR ideal applications such cell phones where high-frequency noise present. device operates properly bypass capacitor placed circuit board outside cartridge; however, rejection slightly degraded this configuration (Figure This well suited applications where there less high-frequency interference such PDAs notebook computers.
Rail-to-Rail Output
When operated from supply, internal 1.5V bias point provides symmetrical, rail-to-rail operation where output swing within 15mV either rail into load. 1.5V bias point independent supply, when operated from supplies other than MAX9810 output headroom supplies (Figure This limits peak-to-peak output approximately: VOUT(P-P) VOUT(P-P) MAX9810 shows phase reversal when device overdriven. device output driven into clipping, overload behavior predictable.
UCSP Layout
land pattern suggested layout 4-bump UCSP, JEDEC website www.ipc.org/html/ framesetcatseg.html.
Electret Condenser Microphone Cartridge Preamplifier MAX9810
POWER
IMPEDANCE CONVERTER
EXTERNAL PREAMPLIFIER OUTPUT ELECTRET 1.5V BIAS
MAX9810
OUTPUT
ELECTRET CARTRIDGE CARTRIDGE
Figure Conventional
Figure MAX9810
1kHz REJECTION SWEPT SIGNAL POWER SUPPLY
1.5V
1kHz AM-SIGNAL REJECTION RATIO (dB) 1000 CARRIER FREQUENCY (MHz) BYPASS CAPACITOR 0.1µF BYPASS CAPACITOR BYPASS CAPACITOR
CLIPPING, SYMMETRICAL RAIL-TO-RAIL OPERATION
1.5V
OUTPUT SIGNAL CLIPS NEGATIVE RAIL FIRST 2.3V
Figure MAX9810 Rejection
1.5V
Chip Information
OUTPUT CLIPS POSITIVE RAIL FIRST
TRANSISTOR COUNT: PROCESS: BiCMOS
Figure Rail-to-Rail Waveforms
Electret Condenser Microphone Cartridge Preamplifier
Package Information
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
UCSP 2x2.EPS
MAX9810
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2002 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

Electret Condenser Microphone Cartridge Preamplifier MAX9810 micr

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