MAX9812LEXT-T DALLAS [Dallas Semiconductor], MAX9812LEXT-T Datasheet

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MAX9812LEXT-T

Manufacturer Part Number
MAX9812LEXT-T
Description
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias
Manufacturer
DALLAS [Dallas Semiconductor]
Datasheet

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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®
outputs, an industry-leading 100dB power-supply rejec-
tion ratio, and a very low 0.015% THD+N. Power-saving
features 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.
19-2840; Rev 0; 4/03
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.
BIAS
Notebook Computers
PDAs
Smart Phones
Car Kit Adapters
Digital Cameras
Video Tape Recorders
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
IN
Microphone Amplifiers with Integrated Bias
4.0V (H VERSION)
2.3V (L VERSION)
REFERENCE
________________________________________________________________ Maxim Integrated Products
General Description
GND
Applications
MAX9812
20dB
V
CC
SHDN
OUT
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
o Internal Low-Noise Microphone Bias Supply
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
o Extended Temperature Range -40°C to +85°C
Pin Configurations, Selector Guide, and Typical Operating
Circuits appear at end of data sheet.
Rail-to-Rail is a trademark of Nippon Motorola Ltd.
IN1/IN2
MAX9813LEKA-T
MAX9813HEKA-T
MAX9812LEXT-T
MAX9812HEXT-T
BIAS
8-Pin SOT23 (3mm x 3mm) Packages
IN1
IN2
MAX9812L/MAX9813L—2.7V to 3.6V
MAX9812H/MAX9813H—4.5V to 5.5V
2.3V for MAX9812L/MAX9813L
4.0V for MAX9812H/MAX9813H
PART
4.0V (H VERSION)
2.3V (L VERSION)
REFERENCE
Simplified Block Diagrams
-40°C to +85°C 6 SC70-6
-40°C to +85°C 6 SC70-6
-40°C to +85°C 8 SOT23-8
-40°C to +85°C 8 SOT23-8
TEMP RANGE
Ordering Information
GND
MAX9813
PIN-
PACKAGE
20dB
V
CC
Features
SHDN
OUT
2.7 to 3.6
4.5 to 5.5
2.7 to 3.6
4.5 to 5.5
V
CC
(V)
1

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MAX9812LEXT-T Summary of contents

Page 1

... 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 PART Applications MAX9812LEXT-T MAX9812HEXT-T MAX9813LEKA-T MAX9813HEKA-T Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet. Rail-to-Rail is a trademark of Nippon Motorola Ltd. ...

Page 2

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND) V ........................................................................-0.3V to +6.0V CC All Other Pins..............................................-0. Continuous Current (IN, SHDN, IN1, IN2, IN1/IN2)...........±20mA OUT, BIAS Short-Circuit Duration (to GND ...

Page 3

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias ELECTRICAL CHARACTERISTICS (continued 3.3V 500µA (MAX9812L/MAX9813L BIAS SHDN = unless otherwise noted. Typical values are at T ...

Page 4

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias (V = 3.3V (MAX9812L/MAX9813L unless otherwise noted.) GAIN vs. FREQUENCY OPEN 10mV OUT P -10 -20 10 100 ...

Page 5

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias (V = 3.3V (MAX9812L/MAX9813L unless otherwise noted.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 22Hz TO 22kHz OUT RMS 0 2kΩ ...

Page 6

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias (V = 3.3V (MAX9812L/MAX9813L unless otherwise noted.) SMALL-SIGNAL PULSE RESPONSE (R = OPEN 10pF 5mV/div OUT 50mV/div 1µs/div OUT-OF-SHUTDOWN WAVEFORM INPUT FLOATING SHDN ...

Page 7

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias PIN NAME MAX9812L/ MAX9813L/ MAX9812H MAX9813H SHDN GND 3 1 OUT BIAS 6 — IN — 6 IN1 — 5 IN2 ...

Page 8

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias V DD 0.1µF 220kΩ IN1/IN2 OUT 0.1µF IN1 22kΩ MAX9813 IN2 2.2kΩ BIAS SHDN GND 2.2kΩ 0.1µF Figure 1. Typical Application Circuit 8 _______________________________________________________________________________________ ...

Page 9

... V 5 BIAS V CC BIAS 2.2kΩ 0.1µF MAX9812 6 IN MIC GND TOP VIEW SHDN 1 MAX9812 GND 2 OUT 3 SC70 Selector Guide PART PIN-PACKAGE MAX9812LEXT-T 6 SC70-6 MAX9812HEXT-T 6 SC70-6 MAX9813LEKA-T 8 SOT23-8 MAX9813HEKA-T 8 SOT23-8 _______________________________________________________________________________________ 4 V 0.1µF BIAS 1 2.2kΩ 2.2kΩ SHDN 0.1µF 3 OUT MIC1 MIC2 ...

Page 10

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 10 ______________________________________________________________________________________ Package Information ...

Page 11

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages PIN 1 I.D. ...

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