19-2408; Rev 0; 4/02
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
General Description
The MAX4060–MAX4063 are differential-input micro-
phone preamplifiers optimized for notebook/PDA audio
systems. These devices feature Rail-to-Rail
®
outputs
with excellent power-supply rejection and common-
mode rejection ratios, making them ideal for low-noise
applications in portable audio systems.
The MAX4060/MAX4062/MAX4063 are capable of
switching their output between the differential input and
a single-ended auxiliary microphone amplifier input. In
addition, the MAX4060/MAX4062/MAX4063 have a low-
noise microphone bias generator. The differential gain
of the MAX4061/MAX4062/MAX4063 is set with a single
resistor. The MAX4060 has a fixed gain of 10V/V and is
PC99/2001 compliant. The MAX4063 has a comple-
mentary output allowing CODECs with differential
inputs to be optimally driven. The MAX4061/MAX4063
include a complete shutdown mode. In shutdown, the
supply current is reduced to 0.3µA and the current to
the microphone bias is cut off for ultimate power saving.
The MAX4060 operates from a 4.5V to 5.5V single sup-
ply and the MAX4061/MAX4062/MAX4063 operate from
2.4V to 5.5V. All devices are specified over the extend-
ed operating temperature range, -40°C to +85°C. The
MAX4060/MAX4061 are available in tiny 8-pin QFN and
8-pin µMAX packages. The MAX4062 is available in a
10-pin µMAX package and the MAX4063 in a 14-pin
TSSOP package.
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Features
2.4V to 5.5V Single-Supply Operation
Adjustable Gain
High PSRR (86dB at 1kHz)
High CMRR (70dB at 1kHz)
Low Input-Referred Noise
On-Board Microphone Bias
750µA Supply Current
0.3µA Shutdown Current
±4kV ESD Protection (AUX_IN)
Complementary Output (MAX4063)
Rail-to-Rail Outputs
THD + N: 0.04% at 1kHz
Available in Space-Saving Packages
8-Pin QFN (MAX4060/MAX4061)
8-Pin µMAX (MAX4060/MAX4061)
10-Pin µMAX (MAX4062)
14-Pin TSSOP (MAX4063)
MAX4060–MAX4063
Typical Operating Circuit
Applications
Notebook Audio
Systems
PDA Audio Systems
USB Audio Peripherals
AES-42 Compliant
Microphones
Signal Conditioning
3 SHDN
2.4V TO 5.5V
6
V
CC
INPUT CONTROL
INT/AUX 2
ADJ 7
12 AUX_IN
MAX4063
OUT 4
Ordering Information
PART
MAX4060EGA
MAX4060EUA
MAX4061EGA
MAX4061EUA
MAX4062EUB
MAX4063EUD*
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 QFN
8 µMAX
8 QFN
8 µMAX
10 µMAX
14 TSSOP
TOP
MARK
ABY
—
ABZ
—
—
—
5 BIAS
V
BIAS
9 IN+
10 IN-
G1
14
R
G
G2
1
OUT 8
GND
11
*Future
product—contact factory for availability.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations and Selector Guide appear at end of
data sheet.
1
________________________________________________________________
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.
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
MAX4060–MAX4063
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
to GND). .................................-0.3V to +6V
Any Other Pin to GND ................................-0.3V to (V
CC
+ 0.3V)
Duration of Short Circuit to GND or V
CC
....................Continuous
Continuous Input Current (any pin) ................................ ±10mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin QFN (derate 4.7mW/°C above +70°C) ................379mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) ..............330mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
14-Pin TSSOP (derate 8.3mW/°C above +70°C) ..........667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
CC
= 3V for MAX4061/MAX4062/MAX4063, V
CC
= 5V for MAX4060, GND = 0,
SHDN
= V
CC
,
INT/AUX
= 0, R
G
= 11.11kΩ,
R
L
= 100kΩ to 1.5V, R
BIAS
=
∞,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1 and 2)
PARAMETER
Supply Voltage Range
Supply Current
SYMBOL
V
CC
I
CC
R
L
= 100kΩ
Output Voltage Swing
V
OUT
R
L
= 2kΩ
Output Common-Mode Voltage
Slew Rate
Supply Current in Shutdown
Output Short-Circuit Current
V
OCM
SR
I
SHDN
I
SC
A
V
= 10V/V
V
SHDN
= 0, MAX4061/MAX4063
To GND
To V
CC
0.001
30
30
±0.1
Inferred from CMRR test
A
V
= 1V/V, MAX4061/MAX4062/MAX4063
1
1
600
Either differential input
100
1
±5
2
V
CC
- V
OH
V
OL
- GND
V
CC
- V
OH
V
OL
- GND
1.25
Inferred from
PSRR test
CONDITIONS
MAX4061/MAX4062/
MAX4063
MAX4060
MIN
2.4
4.5
0.75
2
2
50
50
1.5
±1
1
TYP
MAX
5.5
5.5
1.2
50
50
200
200
1.75
V
V/µs
µA
mA
mV
mA
UNITS
V
DIFFERENTIAL INPUT (INT/AUX = 0 for MAX4060/MAX4062/MAX4063, default for MAX4061)
Input Offset Voltage
Common-Mode Input Voltage
Range
Maximum Differential Input
Voltage
Small-Signal Bandwidth
Input Resistance
Input Resistance Match
V
OS
V
CM
V
DIFFMAX
BW
-3dB
R
IN
R
MATCH
mV
V
V
kHz
kΩ
%
2
_______________________________________________________________________________________
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3V for MAX4061/MAX4062/MAX4063, V
CC
= 5V for MAX4060, GND = 0,
SHDN
= V
CC
,
INT/AUX
= 0, R
G
= 11.11kΩ,
R
L
= 100kΩ to 1.5V, R
BIAS
=
∞,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1 and 2)
PARAMETER
Input Noise-Voltage Density
RMS Output Noise Voltage
Total Harmonic Distortion
Plus Noise
SYMBOL
e
n
V
NRMS
THD + N
CONDITIONS
A
V
= 10V/V, f = 1kHz
A
V
= 100V/V, f = 1kHz, MAX4061/MAX4062/
MAX4063 only
A
V
= 10V/V, BW = 22Hz to 22kHz
A
V
= 10V/V, f = 1kHz, V
OUT
= 0.7V
RMS
,
BW = 22Hz to 22kHz
1V < V
CM
< 2V,
VOUT = 0.7V
RMS
,
MAX4061/MAX4062/
MAX4063
RG = open
RG = 11.11kΩ
RG = 1.01kΩ
1
9.6
96
9.6
MIN
TYP
100
20
125
0.04
1.13
10
100
10.0
70
72
60
86
200
100
f = 1kHz
BW = 22Hz to 22kHz
f = 1kHz, BW = 22Hz to 22kHz
T
A
= +25°C
T
A
= T
MIN
- T
MAX
V
OUT
= 0.7V
RMS
I
BIAS
= 0.8mA to GND, MAX4060
I
BIAS
= 0.5mA to GND, MAX4062/MAX4063
65
50
-10.7
2
2
-10
2.2
V
2.2
-9.3
45
385
0.05
90
kHz
kΩ
nV/√Hz
µV
RMS
%
dB
V/V
86
dB
1.3
10.4
104
10.4
dB
V/V
nV/√Hz
µV
RMS
%
MAX
UNITS
MAX4060–MAX4063
Differential Gain
A
VDIFF
1V < V
CM
< 2V, V
OUT
= 0.7V
RMS
, MAX4060
Common-Mode Rejection Ratio
CMRR
V
CM
= 500mV
P-P
, f = 1kHz
T
A
= +25°C
Power-Supply Rejection Ratio
PSRR
T
A
= T
MIN
- TMAX
V
CC
= 5V
±100mV,
f = 1kHz
AUXILIARY INPUT (MAX4060/MAX4062/MAX4063, INT/AUX = V
CC
)
Small-Signal Bandwidth
Input Resistance
Input Noise-Voltage Density
RMS Output Noise Voltage
Total Harmonic Distortion
Plus Noise
Power-Supply Rejection Ratio
Voltage Gain (Note 4)
BW
-3dB
R
IN
en
V
NRMS
THD + N
PSRR
A
VAUX
BIAS OUTPUT (MAX4060/MAX4062/MAX4063)
Output Voltage
V
OUT
_______________________________________________________________________________________
3
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
MAX4060–MAX4063
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3V for MAX4061/MAX4062/MAX4063, V
CC
= 5V for MAX4060, GND = 0,
SHDN
= V
CC
,
INT/AUX
= 0, R
G
= 11.11kΩ,
R
L
= 100kΩ to 1.5V, R
BIAS
=
∞,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1 and 2)
PARAMETER
Output Resistance
SYMBOL
R
OUT
CONDITIONS
I
BIAS
= 0.8mA to GND, MAX4060
I
BIAS
= 0.5mA to GND, MAX4062/MAX4063
I
BIAS
= 0.8mA to GND, BW = 22Hz to
22kHz, MAX4060
Output Noise Voltage
V
NRMS
I
BIAS
= 0.5mA to GND, BW = 22Hz to
22kHz, MAX4062/MAX4063 (Note 3)
I
BIAS
= 0.8mA to GND,
V
CC
= 4.5V to 5.5V
I
BIAS
= 0.8mA, V
CC
= 5V
+ 100mV
P-P
, f = 1kHz
MAX4062/MAX4063
(Note 3)
I
BIAS
= 0.5mA to GND,
V
CC
= 2.4V to 5.5V
I
BIAS
= 0.5mA, V
CC
= 3V
+ 100mV
P-P
, f = 1kHz
50
50
MIN
2
TYP
2.5
22
50
µV
RMS
20
80
70
dB
74
71
40
MAX
UNITS
kΩ
Ω
MAX4060
Power-Supply Rejection Ratio
PSRR
DIGITAL INPUTS (SHDN for MAX4061/MAX4063 and
INT/AUX
for MAX4060/MAX4062/MAX4063)
Input Leakage Current
Input Voltage High
Input Voltage Low
Shutdown Enable Time
Shutdown Disable Time
I
IN
V
INH
V
INL
t
ON
t
OFF
MAX4061/MAX4063
MAX4061/MAX4063
10
10
V
IN
= 0 or V
CC
0.7
✕
V
CC
0.3
✕
V
CC
±1
µA
V
V
µs
µs
Note 1:
All specifications are 100% tested at T
A
= +25°C. Specification limits over temperature (T
A
= T
MIN
to T
MAX
) are guaranteed
by design, not production tested.
Note 2:
MAX4062/MAX4063 require a 1µF capacitor from BIAS to ground.
Note 3:
The ADJ pin is open circuit (MAX4063 only).
4
_______________________________________________________________________________________
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
Typical Operating Characteristics
(V
CC
= 3V (MAX4061/MAX4062/MAX4063), V
CC
= 5V for MAX4060, A
V
= 10V/V, R
L
≥
100kΩ to 1.5V,
SHDN
= V
CC
(MAX4061/
MAX4063 only), T
A
= +25°C.)
GAIN vs. FREQUENCY
(NO LOAD)
MAX4060 toc01
MAX4060–MAX4063
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DIFF INPUT)
MAX4060 toc02
SUPPLY CURRENT vs. TEMPERATURE
MAX4060 toc03
3
0
V
CC
= 5V
0
-20
-40
PSRR (dB)
1.0
0.8
SUPPLY CURRENT (mA)
V
CC
= 5V
V
CC
= 3V
GAIN (dB)
-3
-6
-9
-12
-15
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
0.6
-60
-80
-100
-120
10
A
V
= 10V/V
0.4
0.2
A
V
= 100V/V
0
100
1k
10k
100k
1M
-40 -25 -10
5
20
35
50
65
80
FREQUENCY (Hz)
TEMPERATURE (°C)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4060 toc04
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX4060 toc05
V
OH
vs. TEMPERATURE
V
OH
= V
CC
- V
OUT
MAX4060 toc06
0.9
0.8
SUPPLY CURRENT (mA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
A
V
= 10V/V
NO LOAD
100
SHUTDOWN SUPPLY CURRENT (nA)
1000
10
I
LOAD
= 2.5mA
100
V
OH
(mV)
10
0.01
I
LOAD
= 50µA
0.001
1
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
1
0.1
5.5
SUPPLY VOLTAGE (V)
V
OL
vs. TEMPERATURE
MAX4060 toc07
V
OH
vs. LOAD CURRENT
V
OH
= V
CC
- V
OUT
150
125
V
OH
(mV)
100
75
50
V
CC
= 5V
V
CC
= 3V
200
V
OL
(mV)
MAX4060 toc08
V
OL
vs. LOAD CURRENT
MAX4060 toc09
1000
175
300
250
I
LOAD
= 2.5mA
100
V
OL
(mV)
V
CC
= 3V
150
100
50
0
10
V
CC
= 5V
I
LOAD
= 50µA
1
-40
-15
10
35
60
85
TEMPERATURE (°C)
25
0
0
1
2
3
4
5
LOAD CURRENT (mA)
0
1
2
3
4
5
LOAD CURRENT (mA)
_______________________________________________________________________________________
5
