MAX4063 MAXIM [Maxim Integrated Products], MAX4063 Datasheet

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MAX4063

Manufacturer Part Number
MAX4063
Description
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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
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 thin QFN
(4mm x 4mm x 0.8mm) and 14-pin TSSOP packages.
19-2753; Rev 0; 1/03
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.
Pin Configurations continued at end of data sheet.
Notebook Audio Systems
Tablet PCs
PDA Audio Systems
Signal Conditioning
P-P
INT/AUX
from a single 3V supply, optimizing the
SHDN
BIAS
OUT
V
ADJ
Differential Microphone Preamplifier with
G2
CC
________________________________________________________________ Maxim Integrated Products
1
2
3
4
5
6
7
General Description
Internal Bias and Complete Shutdown
MAX4063
Pin Configurations
TSSOP
Applications
14
13
12
11
10
9
8
G1
N.C.
AUX_IN
GND
IN-
IN+
OUT
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
*Future product—contact factory for availability.
**EP = Exposed paddle.
MAX4063ETE*
MAX4063EUD
14-Pin TSSOP
16-Pin Thin QFN (4mm x 4mm x 0.8mm)
PART
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
12
10
3
5
9
BIAS
IN+
IN-
SHDN
AUX_IN
R
MAX4063
G
2.4V TO 5.5V
V
14
G1 G2
BIAS
V
CC
1
6
PIN-PACKAGE
16 Thin QFN-EP**
14 TSSOP
Features
GND
INT/AUX 2
11
ADJ
OUT 8
OUT 4
7
1

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MAX4063 Summary of contents

Page 1

... 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 thin QFN (4mm x 4mm x 0.8mm) and 14-pin TSSOP packages. ...

Page 2

Differential Microphone Preamplifier with Internal Bias and Complete Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage (V to GND). .................................-0.3V to +6V CC Any Other Pin to GND ................................-0. Duration of Short Circuit to GND or V ....................Continuous CC Continuous ...

Page 3

... Input Voltage Low Shutdown Enable Time Shutdown Disable Time Note 1: All specifications are 100% tested design, not production tested. Note 2: MAX4063 requires a 1µF capacitor from BIAS to ground and a 10pF capacitor from ADJ to OUT. _______________________________________________________________________________________ = 11.11kΩ 100kΩ to 1.5V +25° ...

Page 4

Differential Microphone Preamplifier with Internal Bias and Complete Shutdown ≥ 100kΩ to 1.5V, SHDN = 3V 20V/ noted.) GAIN vs. FREQUENCY (NO LOAD 2V/V ...

Page 5

... TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (AUX INPUT 22Hz TO 22kHz 1kHz 0.1 0. 10kHz 0.001 OUTPUT VOLTAGE (V ) P-P SMALL-SIGNAL TRANSIENT RESPONSE FOR DIFF INPUT MAX4063 toc18 20µV/div 10µs/div 6 6 DIFF INPUT 5mV/div DIFF OUTPUT 50mV/div 5 ...

Page 6

... FOR DIFF INPUT MAX4063 toc19 S/E INPUT 5mV/div DIFF OUTPUT 100mV/div 10µs/div OUTPUT OVERDRIVEN MAX4063 toc21 S/E INPUT 100mV/div DIFF OUTPUT 2V/div 10µs/div = +25°C, unless otherwise A MAX4063 toc20 DIFF INPUT 100mV/div DIFF OUTPUT 2V/div MAX4063 toc22 DIFF INPUT 500mV/div DIFF OUTPUT 2V/div ...

Page 7

... 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 ...

Page 8

... The microphone and preamplifier may be placed physically further apart, easing PC board layout restrictions. Differential-Gain Adjustment The MAX4063 allows the user to alter the differential gain to optimize the signal-to-noise ratio (SNR) of their system. The gain is set by a single external resistor (R ) connected between the G1 and G2 pins: G Ω ...

Page 9

... AUX_IN and ADJ. ADJ The two differential microphone inputs and the single- ended auxiliary input of the MAX4063 have on-chip bias components, allowing the user to AC-couple any signals into the input. The input resistance is 100kΩ (typ), so the capacitor size may be chosen accordingly to define the LF rolloff desired ...

Page 10

... Driving SHDN high enables the amplifier. SHDN should not be left floating. Differential Output The MAX4063 operates from a 2.4V to 5.5V single sup- ply. Bypass the power supply with a 0.1µF capacitor to ground. In systems where analog and digital grounds are available, the MAX4063 should be connected to the analog ground ...

Page 11

... Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 0.1µF 2.2kΩ 2.2kΩ Figure 3. MAX4063 Used to Bias a Microphone Connected to the Auxiliary Input and the Differential Input ______________________________________________________________________________________ 2. MAX4063 12 AUX_IN 5 BIAS V BIAS 1µ 11kΩ 1µ 0.1µF 9 IN+ ...

Page 12

... Differential Microphone Preamplifier with Internal Bias and Complete Shutdown V CC 1kΩ 1µF 11.1kΩ 2.2µF 1kΩ 1kΩ 2.2µF 1kΩ Figure 4. Using the MAX4063 with Differential Input/Differential Output Configuration 12 ______________________________________________________________________________________ 2. MAX4063 ADJ 12 AUX_IN 5 BIAS V BIAS 14 G1 OUT 1 G2 OUT 8 0.1µF 9 IN+ INT/AUX 2 0.1µ ...

Page 13

... V CC MAX4063 INT/AUX 2 12 AUX_IN 7 ADJ OUT 4 SHDN 3 SHDN OUT 8 9 IN+ 10 IN- BIAS 5 V BIAS G1 G2 GND Pin Configurations (continued) TOP VIEW SHDN OUT BIAS AUX_IN 2 11 GND MAX4063 THIN QFN 13 ...

Page 14

Differential Microphone Preamplifier with Internal Bias and Complete Shutdown (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 14 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE 12,16,20,24L QFN ...

Page 15

Differential Microphone Preamplifier with Internal Bias and Complete Shutdown (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any ...

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