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MAX9813LEKA+T

P1-P3P4-P6P7-P9P10-P10
General Description
The MAX9812/MAX9813 are single/dual-input, 20dB
fixed-gain microphone amplifiers. They offer tiny pack-
aging and a low-noise, integrated microphone bias,
making them ideal for portable audio applications such
as notebook computers, cell phones, and PDAs. These
amplifiers feature a 500kHz bandwidth, rail-to-rail out-
puts, an industry-leading 100dB power-supply rejection
ratio, and a very low 0.015% THD+N. Power-saving fea-
tures include very low 230µA supply current and a total
shutdown mode that cuts the combined supply and
BIAS currents to only 100nA.
The MAX9812 is a single amplifier in a 6-pin SC70
package (2mm x 2.1mm) and the MAX9813 is a dual-
input amplifier available in an 8-pin SOT23 (3mm x
3mm) package. The MAX9813 has two inputs allowing
two microphones to be multiplexed to a single output.
The MAX9812/MAX9813 are offered in two grades. The
MAX9812L/MAX9813L are optimized for 3.3V supply
operation (2.7V to 3.6V). The MAX9812H/MAX9813H are
PC2001 compliant and are optimized for 5V operation
(4.5V to 5.5V). Both devices are specified over the -40°C
to +85°C extended operating temperature range.
Applications
Notebook Computers
PDAs
Smart Phones
Car Kit Adapters
Digital Cameras
Video Tape Recorders
Features
o PC2001 Compliant
o 100dB at 217Hz Power-Supply Rejection Ratio
o Very Low 230µA Quiescent Current
o Low 0.015% THD+N
o Available in Two Versions
MAX9812L/MAX9813L—2.7V to 3.6V
MAX9812H/MAX9813H—4.5V to 5.5V
o Internal Low-Noise Microphone Bias Supply
2.3V for MAX9812L/MAX9813L
4.0V for MAX9812H/MAX9813H
o 100nA Low-Power Shutdown Mode
o Rail-to-Rail Outputs
o 20dB Fixed Gain
o Available in Tiny 6-Pin SC70 (2mm x 2.1mm) and
8-Pin SOT23 (3mm x 3mm) Packages
o Extended Temperature Range -40°C to +85°C
19-2840; Rev 2; 9/12
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
MAX9812/MAX9813
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
Ordering Information
Pin Configurations, Selector Guide, and Typical Operating
Circuits appear at end of data sheet.
PART TEMP RANGE
PIN-
PA CK A G EV
CC
(V)
MAX9812LEXT+T -40°C to +85°C 6 SC70 2.7 to 3.6
MAX9812LEXT/V+T -40°C to +85°C 6 SC70 2.7 to 3.6
MAX9812HEXT+T -40°C to +85°C 6 SC70 4.5 to 5.5
MAX9813LEKA+T -40°C to +85°C 8 SOT23 2.7 to 3.6
MAX9813HEKA+T -40°C to +85°C 8 SOT23 4.5 to 5.5
MAX9812
20dB
REFERENCE
2.3V (L VERSION)
4.0V (H VERSION)
IN
BIAS
OUT
SHDN
V
CC
GND
MAX9813
20dB
IN1/IN2
REFERENCE
2.3V (L VERSION)
4.0V (H VERSION)
IN2
IN1
BIAS
OUT
SHDN
V
CC
GND
Simplified Block Diagrams
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
2
Maxim Integrated
MAX9812/MAX9813
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.3V, I
BIAS
= 500µA (MAX9812L/MAX9813L), V
CC
= 5V, I
BIAS
= 800µA (MAX9812H/MAX9813H), V
GND
= 0V, R
L
= open,
SHDN = V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
(All voltages referenced to GND.)
V
CC
........................................................................-0.3V to +6.0V
All Other Pins..............................................-0.3V to (V
CC
+ 0.3V)
Continuous Current (IN, SHDN, IN1, IN2, IN1/IN2)...........±20mA
OUT, BIAS Short-Circuit Duration (to GND or V
CC
) ...Continuous
Continuous Power Dissipation (T
A
= +70°C)
SC70 (derate 3.1mW/°C above +70°C) .......................245mW
SOT23 (derate 8.9mw/°C above +70°C) .....................714mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL
MAX9812L/MAX9813L 2.7 3.6
Supply Voltage Range V
CC
MAX9812H/MAX9813H
Inferred from
PSRR test
4.5 5.5
V
Supply Current I
CC
I
BIAS
= 0A 230 400 µA
Shutdown Supply Current I
CC_SHDN
SHDN = GND 0.1 1 µA
MAX9812L/MAX9813L 1.35 1.5 1.65
Amplifier Output Bias Voltage V
OUT_DC
MAX9812H/MAX9813H 2.25 2.5 2.75
V
Input Resistance R
IN
85 kΩ
Voltage Gain A
V
19 20 21 dB
DC 90 100
f = 217Hz 100
f = 1kHz 100
Power-Supply Rejection Ratio PSRR
OUT
Input referred, T
A
= +25°C
f = 10kHz 90
dB
R
L
= 10kΩ to V
CC
/2
V
CC
-
0.1
V
OH
R
L
= 1kΩ to V
CC
/2
V
CC
-
0.25V
V
CC
-
0.1V
R
L
= 10kΩ to V
CC
/2 0.1
Output Voltage Swing
V
OL
R
L
= 1kΩ to V
CC
/2 0.1 0.25
V
Output Short-Circuit Current I
OUT_SC
Sinking or sourcing 3 12 24 mA
Small-Signal -3dB Bandwidth BW V
OUT
= 10mV
P-P
400 kHz
Output Capacitive-Load Stability C
L
No sustained oscillations 50 pF
Output Impedance Z
OUT
f = 1kHz 0.5 Ω
Output Slew Rate SR V
OUT
= 1V step 1 V/µs
3
Maxim Integrated
MAX9812/MAX9813
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.3V, I
BIAS
= 500µA (MAX9812L/MAX9813L), V
CC
= 5V, I
BIAS
= 800µA (MAX9812H/MAX9813H), V
GND
= 0V, R
L
= open,
SHDN = V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Note 1: All specifications are 100% tested at T
A
= +25°C. Temperature limits are guaranteed by design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Amplifier Input Voltage-Noise
Density
e
n
Inputs at AC GND f = 1kHz 40 nV/√Hz
Total Integrated Input Noise V
n
22Hz to 22kHz BW, inputs at AC GND 5 µV
RMS
1kHz 75
Off-Isolation
Input referred, MAX9813
only
10kHz 60
dB
V
OUT
= 1V
P-P
(L version)
0.04
Total Harmonic Distortion Plus
Noise
THD+N
f = 1kHz, R
L
= 10kΩ to
V
CC
/2, BW = 22Hz to
22kHz
V
OUT
= 4V
P-P
(H version)
0.015
%
BIAS
MAX9812L/MAX9813L 2.1 2.30 2.55
Bias Output Voltage Range V
BIAS
MAX9812H/MAX9813H 3.6 4.0 4.4
V
Bias Output Resistance R
BIAS
0.1 Ω
DC, T
A
= +25°C 70 80
f = 217Hz 80
f = 1kHz 75
Power-Supply Rejection Ratio
(V
CC
to BIAS)
PSRR
BIAS
f = 10kHz 55
dB
BIAS Current Limit I
BIAS_SC
BIAS short to GND 5 22 50 mA
BIAS Capacitive-Load Stability C
BIAS
No sustained oscillations 50 pF
Total Integrated BIAS Noise V
n
22Hz to 22kHz BW 29 µV
RMS
DIGITAL INPUTS (SHDN, IN1/IN2)
Logic-Low Threshold V
IL
0.8 V
Logic-High Threshold V
IH
2.0 V
Logic Input Current I
IN
SHDN = GND or V
CC
±1µA
Shutdown Enable Time t
SHDN_ON
95% of settled value 10 ms
Shutdown Disable Time t
SHDN_OFF
50 µs
IN1/IN2 Select Time t
SEL
10 µs
P1-P3P4-P6P7-P9P10-P10

MAX9813LEKA+T

Mfr. #:
Buy MAX9813LEKA+T
Manufacturer:
Maxim Integrated
Description:
Microphone Preamplifiers Dual Fixed Gain Microphone Amp
Lifecycle:
New from this manufacturer.
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