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MAX4063ETE+ |MAX4063ETEMAXIMN/a34avaiDifferential Microphone Preamplifier with Internal Bias and Complete Shutdown


MAX4063ETE+ ,Differential Microphone Preamplifier with Internal Bias and Complete ShutdownApplicationsNotebook Audio SystemsTypical Operating CircuitTablet PCs2.4V TO 5.5VPDA Audio SystemsS ..
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MAX4063ETE+
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
General Description
The MAX4063 is a differential-input microphone preampli-
fier optimized for high-performance, portable applica-
tions. The device features two selectable inputs,
differential outputs, adjustable gain, an integrated low-
noise bias source, and a low-power shutdown mode.
Two input paths provide both differential and single-
ended microphone sensing. The high-noise rejection of
the differential input is ideally suited to an internal micro-
phone where system noise and long-run PC board traces
can degrade low-level signals. The single-ended input
provides a simple connection to an external microphone.
The differential and single-ended inputs have indepen-
dent, adjustable gains that are set with a single external
resistor. Differential outputs provide a full-scale signal of
up to 6VP-Pfrom a single 3V supply, optimizing the
dynamic range of the amplified signal. A complete shut-
down mode reduces the supply current to only 0.3µA
and disables the microphone bias for the ultimate in
power savings.
The MAX4063 operates from 2.4V to 5.5V and is specified
over the extended -40°C to +85°C operating temperature
range. The MAX4063 is available in both 16-pin TQFN
(4mm x 4mm x 0.8mm) and 14-pin TSSOP packages.
Applications
Features
2.4V to 5.5V Single-Supply OperationDifferential Inputs and OutputsAdjustable GainHigh 95dB PSRRHigh 79dB CMRRLow-Noise, Integrated Microphone Bias750µA Supply Current0.3µA Shutdown Current±4kV ESD Protection (AUX_IN)THD+N: 0.05% at 1kHzAvailable in Space-Saving Packages
14-Pin TSSOP
16-Pin TQFN (4mm x 4mm x 0.8mm)
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown

IN-
IN+
BIAS
AUX_IN12
SHDN3
VBIAS
VCC
2.4V TO 5.5V
MAX4063
INT/AUX2
OUT8
OUT4
ADJ7
GND114G2
N.C.
AUX_IN
GNDOUT
SHDN
INT/AUX
MAX4063
IN-
IN+
OUTADJ
VCC
BIAS
TSSOP
Typical Operating Circuit
Ordering Information

19-2753; Rev 1; 6/11
Notebook Audio Systems
Tablet PCs
PDA Audio Systems
Signal Conditioning
PARTTEMP RANGEPIN-PACKAGE

MAX4063ETE+-40°C to +85°C16 TQFN-EP*
MAX4063EUD+-40°C to +85°C14 TSSOP
Pin Configurations

Pin Configurations continued at end of data sheet.
*EP = Exposed pad.
+Denotes a lead(pB)-free/RoHS-compliant package.
MAX4063
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VCC= 3V, VGND= 0V, VSHDN= VCC,VINT/AUX= 0V, RG= 11.11kΩ, RL= 100kΩto 1.5V, RBIAS= ∞, VOUTis measured between
OUT and OUT. TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Notes 1 and 2)
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.
Supply Voltage (VCCto GND)..................................-0.3V to +6V
Any Other Pin to GND................................-0.3V to (VCC+ 0.3V)
Duration of Short Circuit to GND or VCC....................Continuous
Continuous Input Current (any pin) ................................±10mA
Continuous Power Dissipation (TA= +70°C)
14-Pin TSSOP (derate 10.0mW/°C above +70°C).....796.8mW
16-Pin TQFN (derate 25.0mW/°C above +70°C)........2000mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

Supply Voltage RangeVCCInferred from PSRR test2.45.5V
Supply CurrentICC0.751.1mA
Output Common-Mode VoltageVOCM1.251.51.75V
Slew RateSRAV = 20V/V±1V/µs
Supply Current in ShutdownI SHDNV SHDN = 0V0.0011µA
To GND30Output Short-Circuit CurrentISCTo VCC30mA
DIFFERENTIAL INPUT (VINT/AUX = 0V)

Input Offset VoltageVOSTA = +25°C±1mV
Common-Mode Input Voltage RangeVCMInferred from CMRR test12V
Maximum Differential Input VoltageVDIFFMAXAV = 2V/V1V
Small-Signal BandwidthBW-3dB600kHz
Input ResistanceRINEither differential input100kΩ
Input Resistance MatchRMATCH1%
AV = 20V/V, f = 1kHz70Input Noise-Voltage DensityenAV = 200V/V, f = 1kHz12nV/√Hz
RMS Output Noise VoltageVNRMSAV = 20V/V, BW = 22Hz to 22kHz225µVRMS
Total Harmonic Distortion Plus NoiseTHD+NAV = 20V/V, f = 1kHz, VOUT = 0.7VRMS,
BW = 22Hz to 22kHz0.05%
RG = open2
RG = 11.11kΩ19.22020.8Differential GainAVDIFF1V < VCM < 2V,
VOUT = 0.7VRMS
RG = 1.01kΩ200
V/V
Common-Mode Rejection RatioCMRRVCM = 500mVP-P, f = 1kHz70dB
TA = +25°C95
TA = TMIN - TMAX85Power-Supply Rejection RatioPSRR
VCC = 5V ±100mV, f = 1kHz86
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
ELECTRICAL CHARACTERISTICS (continued)

(VCC= 3V, VGND= 0V, VSHDN= VCC,VINT/AUX= 0V, RG= 11.11kΩ, RL= 100kΩto 1.5V, RBIAS= ∞, VOUTis measured between
OUT and OUT. TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Notes 1 and 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
AUXILIARY INPUT (INT/AUX = VCC)

Small-Signal BandwidthBW-3dB230kHz
Input ResistanceRIN100kΩ
Input Noise-Voltage Densityenf = 1kHz200nV/√Hz
RMS Output Noise VoltageVNRMSBW = 22Hz to 22kHz620µVRMS
Total Harmonic Distortion Plus NoiseTHD+Nf = 1kHz, BW = 22Hz to 22kHz0.007%
TA = +25°C80100Power-Supply Rejection RatioPSRRTA = TMIN - TMAX72dB
Voltage GainAVAUXVOUT = 0.7VRMS-19.5-20-20.5V/V
BIAS OUTPUT

Output VoltageVOUTIBIAS = 0.5mA to GND22.2V
Output ResistanceROUTIBIAS = 0.5mA to GND1630Ω
Output Noise VoltageVNRMSIBIAS = 0.5mA to GND, BW = 22Hz to 22kHz20µVRMS
IBIAS = 0.5mA to GND, VCC = 2.4V to 5.5V6074
Power-Supply Rejection RatioPSRRIBIAS = 0.5mA, VCC = 3V + 100mVP-P,
f = 1kHz71dB
DIGITAL INPUTS (SHDN and INT/AUX)

Input Leakage CurrentIINVIN = 0V or VCC±1µA
Input Voltage HighVINH0.7 ✕ VCCV
Input Voltage LowVINL0.3 ✕ VCCV
Shutdown Enable TimetON10µs
Shutdown Disable TimetOFF10µs
Note 1:
All specifications are 100% tested at TA= +25°C. Specification limits over temperature (TA= TMINto TMAX) are guaranteed
by design, not production tested.
Note 2:
MAX4063 requires a 1µF capacitor from BIAS to ground and a 10pF capacitor from ADJ to OUT.
MAX4063
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown

MAX4063 toc01
FREQUENCY (Hz)
GAIN (dB)
100k10k1k1001M
GAIN vs. FREQUENCY
(NO LOAD)

VCC = 5V
AV = 2V/V
MAX4063 toc02
FREQUENCY (Hz)
PSRR (dB)
100k10k1k100
-1401M
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DIFF INPUT)

AV = 200V/V
AV = 20V/V
SUPPLY CURRENT vs. TEMPERATURE

MAX4063 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (mA)655035205-10-25
VCC = 3V
VCC = 5V
NO LOAD
SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4063 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
NO LOAD
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE

MAX4063 toc05
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (nA)3510-15
VOH vs. TEMPERATURE
MAX4063 toc06
TEMPERATURE (°C)
(mV)3510-15
ILOAD = 2.5mA
ILOAD = 50μA
VOL vs. TEMPERATURE

MAX4063 toc07
(mV)3510-15
ILOAD = 2.5mA
ILOAD = 50μA
VOH vs. LOAD CURRENT

MAX4063 toc08
(mV)321
VOH = VCC - VOUT
VCC = 3V
VOL vs. LOAD CURRENT

MAX4063 toc09
(mV)32105
VCC = 3V
Typical Operating Characteristics

(VCC= 3V, AV= 20V/V, RL≥100kΩto 1.5V, VSHDN= VCC, VOUTis measured between OUT and OUT. TA= +25°C, unless otherwise
noted.)
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
Typical Operating Characteristics (continued)

(VCC= 3V, AV= 20V/V, RL≥100kΩto 1.5V, VSHDN= VCC, VOUTis measured between OUT and OUT. TA= +25°C, unless otherwise
noted.)1k10010k100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (DIFF INPUT)

MAX4063 toc10
FREQUENCY (Hz)
THD+N (
VOUT = 4.5VP-P1k10010k100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (AUX INPUT)

MAX4063 toc11
FREQUENCY (Hz)
THD+N (
VOUT = 4.5VP-P
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT AMPLITUDE (DIFF INPUT)
OUTPUT VOLTAGE (VP-P)
THD+N (
BW = 22Hz TO 22kHz
f = 1kHz
f = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT AMPLITUDE (DIFF INPUT)
MAX4063 toc13
OUTPUT VOLTAGE (VP-P)
THD+N (
BW = 22Hz TO 22kHz
VCC = 5V
f = 1kHz
f = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT AMPLITUDE (AUX INPUT)
MAX4063 toc14
OUTPUT VOLTAGE (VP-P)
THD+N (
BW = 22Hz TO 22kHz
VCC = 5V
f = 1kHz
f = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT AMPLITUDE (AUX INPUT)
MAX4063 toc15
OUTPUT VOLTAGE (VP-P)
THD+N (
BW = 22Hz TO 22kHz
VCC = 5V
f = 1kHz
f = 10kHz
MIC BIAS OUTPUT NOISE

MAX4063 toc17
100ms/div
20μV/div
VCC = 5V
BW = 22Hz TO 22kHz
SMALL-SIGNAL TRANSIENT RESPONSE
FOR DIFF INPUT

MAX4063 toc18
10μs/div
DIFF
INPUT
5mV/div
DIFF
OUTPUT
50mV/div
MAX4063 toc16
INPUT-REFERRED NOISE (nV/
Hz)
10k1k100
400100k
INPUT-REFERRED NOISE
vs. FREQUENCY (DIFF INPUT)
MAX4063
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
SMALL-SIGNAL TRANSIENT RESPONSE
FOR AUX INPUT

MAX4063 toc19
10μs/div
S/E
INPUT
5mV/div
DIFF
OUTPUT
100mV/div
LARGE-SIGNAL TRANSIENT RESPONSE
FOR DIFF INPUT

MAX4063 toc20
10μs/div
DIFF
INPUT
100mV/div
DIFF
OUTPUT
2V/div
OUTPUT OVERDRIVEN

MAX4063 toc22
10μs/div
DIFF
INPUT
500mV/div
DIFF
OUTPUT
2V/div
LARGE-SIGNAL TRANSIENT RESPONSE
FOR AUX INPUT

MAX4063 toc21
10μs/div
S/E
INPUT
100mV/div
DIFF
OUTPUT
2V/div
Typical Operating Characteristics (continued)

(VCC= 3V, AV= 20V/V, RL≥100kΩto 1.5V, VSHDN= VCC, VOUTis measured between OUT and OUT. TA= +25°C, unless otherwise
noted.)
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
Detailed Description

The MAX4063 is a differential microphone pre-
amplifier providing high-quality amplification, optimized
for use in computer and mobile applications. This device
features adjustable gain, very high power-supply rejec-
tion (95dB), and common-mode rejection (79dB), making
it ideal for low-noise applications. The MAX4063 provides
a differential input stage, making the device particularly
effective when layout constraints force the microphone
amplifier to be physically remote from the ECM micro-
phone.
The MAX4063 is capable of switching its output
between the differential input and an inverting single-
ended input. INT/AUX selects either the differential
input or single-ended auxiliary input. In addition, the
MAX4063 has an integrated microphone bias source,
simplifying system design and eliminating the need for
external components. The MAX4063 has a complemen-
tary output allowing CODECs and other devices with
differential inputs to be optimally driven (see Functional
Diagram). The MAX4063 includes a 0.3µA shutdown
mode for ultimate power savings. The differential gain
of the MAX4063 is set with a single resistor connected
between the G1 and G2 pins. The MAX4063 has an
internal default gain of 20V/V on the AUX_IN input. The
AUX_IN gain can be increased with a single external
resistor (see the Differential-Gain Adjustment and
Auxiliary Input-Gain Adjustment sections).
Differential Input

The main microphone amplifier is a low-noise, differen-
tial input structure. This is an almost essential element
when faced with amplification of low-amplitude analog
signals in digitally intense environments such as note-
PIN
TSSOPTQFNNAMEFUNCTION

115G2Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for
the differential amplifier (see Adjustable Differential Gain-Setting section).
216INT/AUXInternal (Differential) or Auxiliary (Single-Ended) Input Select. Drive INT/AUX low to select
differential in or high to select auxiliary in.SHDNShutdown Input. Drive SHDN high for normal operation. Drive SHDN low for shutdown
mode.2OUTAmplifier Output. OUT is high impedance when in shutdown mode.3BIASExternal Electret Microphone Capsule Bias Output. Bypass BIAS with a 1µF capacitor to
ground.VCCPower Supply. Bypass the VCC to GND with a 0.1µF capacitor.5ADJAdjustable Gain Select for AUX_IN (see Auxiliary Input-Gain Adjustment section). Connect
a 10pF capacitor between OUT and ADJ.OUTComplementary Amplifier Output. OUT is high impedance in shutdown mode.9IN+Noninverting Differential Amplifier Input. AC-couple the audio signal into IN+.10IN-Inverting Differential Amplifier Input. AC-couple the audio signal into IN-.11GNDGround12AUX_INSingle-Ended Input for Auxiliary Microphone. AC-couple the audio signal into AUX_IN.6, 8, 14N.C.No Connection. Not internally connected.13G1Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for
the differential amplifier.EPExposed Pad (TQFN Only). Internally connected to GND. Connect to a large ground plane
to maximize thermal performance. Not intended as an electrical connection point.
Pin Description
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