Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsLinear IC - Audio amplifier 2-channel (stereo) Class AB TQFN 16 (4x4)

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 6V

P-P

from 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

o 2.4V to 5.5V Single-Supply Operation

o Differential Inputs and Outputs

o Adjustable Gain

o High 95dB PSRR

o High 79dB CMRR

o Low-Noise, Integrated Microphone Bias

o 750µA Supply Current

o 0.3µA Shutdown Current

o ±4kV ESD Protection (AUX_IN)

o THD+N: 0.05% at 1kHz

o Available in Space-Saving Packages

14-Pin TSSOP

16-Pin TQFN (4mm x 4mm x 0.8mm)

MAX4063

Differential Microphone Preamplifier with

Internal Bias and Complete Shutdown

________________________________________________________________

Maxim Integrated Products

IN-

IN+

BIAS

AUX_IN

SHDN

BIAS

2.4V TO 5.5V

MAX4063

INT/AUX

OUT 8

OUT

ADJ

GND

G1 G2

N.C.

AUX_IN

GNDOUT

SHDN

INT/AUX

MAX4063

IN-

IN+

OUTADJ

BIAS

TSSOP

Typical Operating Circuit

Ordering Information

19-2753; Rev 1; 6/11

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.

Notebook Audio Systems

Tablet PCs

PDA Audio Systems

Signal Conditioning

PART TEMP RANGE PIN-PACKAGE

MAX4063ETE+ -40°C to +85°C 16 TQFN-EP*

MAX4063EUD+ -40°C to +85°C 14 TSSOP

Pin Configurations

Pin Configurations continued at end of data sheet.

*EP = Exposed pad.

Denotes a lead(pB)-free/RoHS-compliant package.

Summary of content (14 pages)

PAGE 1
9-2753; Rev 1; 6/11 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown The MAX4063 is a differential-input microphone preamplifier optimized for high-performance, portable applications. The device features two selectable inputs, differential outputs, adjustable gain, an integrated lownoise bias source, and a low-power shutdown mode. Two input paths provide both differential and singleended microphone sensing.
PAGE 2
MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to 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.
PAGE 3
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown (VCC = 3V, VGND = 0V, VSHDN = VCC, VINT/AUX = 0V, RG = 11.11kΩ, RL = 100kΩ to 1.5V, RBIAS = ∞, VOUT is measured between OUT and OUT. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
Typical Operating Characteristics (VCC = 3V, AV = 20V/V, RL ≥ 100kΩ to 1.5V, VSHDN = VCC, VOUT is measured between OUT and OUT. TA = +25°C, unless otherwise noted.) PSRR (dB) 0 AV = 20V/V -80 -3 -100 -6 -120 -9 -140 AV = 200V/V VCC = 3V 0.6 0.4 0.2 NO LOAD 100 1k 10k 100k 1M 0 10 100 1k 10k 100k FREQUENCY (Hz) FREQUENCY (Hz) SUPPLY CURRENT vs. SUPPLY VOLTAGE SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 0.7 0.6 0.5 0.4 0.3 0.2 20 35 50 65 80 VOH vs.
PAGE 5
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 10 MAX4063 toc11 VOUT = 4.5VP-P TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (DIFF INPUT) 1 MAX4063 toc10 1 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (AUX INPUT) VOUT = 4.5VP-P BW = 22Hz TO 22kHz 1 3V 3V 0.1 MAX4063 toc12 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (DIFF INPUT) 5V THD+N (%) THD+N (%) THD+N (%) 0.1 0.01 5V f = 1kHz 0.1 0.01 0.01 0.001 100 1k 10k 0.
PAGE 6
MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown Typical Operating Characteristics (continued) (VCC = 3V, AV = 20V/V, RL ≥ 100kΩ to 1.5V, VSHDN = VCC, VOUT is measured between OUT and OUT. TA = +25°C, unless otherwise noted.
PAGE 7
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown PIN NAME FUNCTION TSSOP TQFN 1 15 G2 Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for the differential amplifier (see Adjustable Differential Gain-Setting section). 2 16 INT/AUX Internal (Differential) or Auxiliary (Single-Ended) Input Select. Drive INT/AUX low to select differential in or high to select auxiliary in. 3 1 SHDN 4 2 OUT Amplifier Output.
PAGE 8
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063 Functional Diagram 2.4V TO 5.5V BIAS 6 VCC MAX4063 12 AUX_IN INT/AUX 2 ADJ 7 14 G1 OUT 4 BIAS RG 1 G2 OUT 8 9 IN+ 10 IN- BIAS VCC 5 VBIAS 3 SHDN SHDN GND 11 book PCs or PDAs. Used correctly, the advantages over a single-ended solution are: • Better power-supply noise rejection. • Less degradation from noise in PC board ground planes. Hence, an 11.11kΩ resistor yields a gain of 20V/V, or 26dB.
PAGE 9
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063 2.4V TO 5.5V 6 100kΩ VCC RBIAS 5 BIAS VBIAS CBIAS MAX4063 12 AUX_IN INT/AUX 2 7 ADJ 14 G1 OUT 4 1 G2 OUT 8 9 IN+ 10 INVCC 3 SHDN SHDN GND 11 Figure 1. MAX4063 with Auxiliary Input Configuration where: AVAUX = VOUT − VOUT VAUX_IN RADJ is placed between AUX_IN and ADJ.
PAGE 10
MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown mode application. The topology used in the MAX4063 means that the CMRR actually improves at higher differential gains—another advantage of using differential sensing. 2.4V TO 5.5V 6 VCC Auxiliary Input The auxiliary input is a single-ended input intended to be used with a jack-socket type microphone input (Figure 1). Internal DC-bias components (as on the main inputs) allow the input signal to be AC-coupled.
PAGE 11
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063 2.4V TO 5.5V 6 VCC RADJ MAX4063 0.1µF ADJ 7 12 AUX_IN 5 2.2kΩ 1µF BIAS 10pF VBIAS 14 G1 OUT 4 1µF RG 11kΩ 1 G2 2.2kΩ 0.1µF OUT 8 9 IN+ INT/AUX 2 VCC 10 INSHDN 0.1µF SHDN 3 GND 11 Figure 3.
PAGE 12
MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 2.4V TO 5.5V 6 VCC MAX4063 VCC 12 AUX_IN 5 1kΩ ADJ 7 1µF BIAS 10pF VBIAS 14 G1 1µF OUT 4 11.1kΩ 2.2µF 1 G2 1kΩ 0.1µF OUT 8 ADC 1µF 9 IN+ INT/AUX 2 0.1µF 10 INVCC 1kΩ 3 SHDN SHDN GND 2.2µF 11 1kΩ Figure 4.
PAGE 13
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 2.4V TO 5.5V 6 VCC MAX4063 12 AUX_IN INT/AUX 2 ADJ 7 OUT 4 3 SHDN SHDN OUT 8 9 IN+ 10 INVBIAS G1 14 Chip Information BIAS 5 G2 GND 11 1 Pin Configurations (continued) PROCESS: BiCMOS 14 SSOP U14+1 21-0066 90-0113 16 TQFN T1644+4 21-0139 90-0070 G1 13 12 AUX_IN OUT 2 11 GND MAX4063 BIAS 3 10 INEP* VCC 4 5 6 7 8 N.C. LAND PATTERN NO. 14 OUT OUTLINE NO. 15 N.C.
PAGE 14
MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown Revision History REVISION NUMBER REVISION DATE 0 1/03 Initial release 6/11 Added EP information to Pin Description, updated power dissipation ratings, updated Ordering Information and Pin Configuration for lead-free parts 1 DESCRIPTION PAGES CHANGED — 1, 2, 7, 13 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.