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PDF MAX9812 Data sheet ( Hoja de datos )
| Número de pieza | MAX9812 | |
| Descripción | Tiny / Low-Cost / Single/Dual-Input / Fixed-Gain Microphone Amplifiers with Integrated Bias | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9812 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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19-2840; Rev 0; 4/03
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
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®
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.
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
Ordering Information
PART
PIN-
TEMP RANGE PACKAGE
VCC (V)
MAX9812LEXT-T -40°C to +85°C 6 SC70-6
2.7 to 3.6
MAX9812HEXT-T -40°C to +85°C 6 SC70-6
4.5 to 5.5
MAX9813LEKA-T -40°C to +85°C 8 SOT23-8 2.7 to 3.6
MAX9813HEKA-T -40°C to +85°C 8 SOT23-8 4.5 to 5.5
Pin Configurations, Selector Guide, and Typical Operating
Circuits appear at end of data sheet.
Rail-to-Rail is a trademark of Nippon Motorola Ltd.
Simplified Block Diagrams
VCC VCC
BIAS REFERENCE
2.3V (L VERSION)
4.0V (H VERSION)
SHDN
BIAS REFERENCE
2.3V (L VERSION)
4.0V (H VERSION)
SHDN
IN1
IN OUT
20dB
OUT
20dB
IN2
MAX9812
GND
IN1/IN2
MAX9813
GND
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
Typical Operating Characteristics (continued)
(VCC = 3.3V (MAX9812L/MAX9813L), VCC = 5V (MAX9812H/MAX9813H), GND = 0V, RL = 10kΩ to VCC/2, SHDN = VCC, TA = +25°C,
unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
1
BW = 22Hz TO 22kHz
VOUT = 1VRMS
0.1 RL = 2kΩ
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT AMPLITUDE
10
H VERSION
BW = 22Hz TO 22kHz
1
f = 10kHz
0.1
0.01
VOUT = 1VRMS
RL = 10kΩ
0.001
10
100 1k 10k
FREQUENCY (Hz)
100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT AMPLITUDE
100
L VERSION
BW = 22Hz TO 22kHz
10 f = 1kHz
1 f = 10kHz
0.01
f = 100Hz
f = 1kHz
0.001
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT AMPLITUDE (VRMS)
INPUT-REFERRED NOISE vs. FREQUENCY
100
INPUTS AT AC GND
70
50
0.1
0.01 f = 100Hz
30
0.001
0
0.5 1.0
OUTPUT AMPLITUDE (VRMS)
1.5
10
10
100 1k 10k
FREQUENCY (Hz)
100k
10,000
BIAS NOISE vs. FREQUENCY
1000
100
10
10
100 1k 10k
FREQUENCY (Hz)
100k
OFF-ISOLATION vs. FREQUENCY
10
0
MAX9813
VIN1 = 100mVRMS
-10
-20
-30
-40
-50 IN1 TO OUT WITH
IN2 SELECTED
-60
-70
-80
-90
-100
10 100 1k 10k 100k
FREQUENCY (Hz)
_______________________________________________________________________________________ 5
5 Page 
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain
Microphone Amplifiers with Integrated Bias
Package Information (continued)
(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.)
b
CL
SEE DETAIL "A"
e
CL
PIN 1
I.D. DOT
(SEE NOTE 6)
A A2
e1
D
CL
E CL
A1
NOTE:
1. ALL DIMENSIONS ARE IN MILLIMETERS.
2. FOOT LENGTH MEASURED FROM LEAD TIP TO UPPER RADIUS OF
HEEL OF THE LEAD PARALLEL TO SEATING PLANE C.
3. PACKAGE OUTLINE EXCLUSIVE OF MOLD FLASH & METAL BURR.
4. PACKAGE OUTLINE INCLUSIVE OF SOLDER PLATING.
5. COPLANARITY 4 MILS. MAX.
6. PIN 1 I.D. DOT IS 0.3 MM MIN. LOCATED ABOVE PIN 1.
7. SOLDER THICKNESS MEASURED AT FLAT SECTION OF LEAD
BETWEEN 0.08mm AND 0.15mm FROM LEAD TIP.
8. MEETS JEDEC MO178.
E1
C
SEATING PLANE C
SYMBOL
A
A1
A2
b
C
D
E
E1
L
L2
e
e1
0
MIN MAX
0.90
1.45
0.00
0.15
0.90
1.30
0.28
0.45
0.09
0.20
2.80 3.00
2.60 3.00
1.50 1.75
0.30
0.60
0.25 BSC.
0.65 BSC.
1.95 REF.
08
L2
GAUGE PLANE
L0
DETAIL "A"
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, SOT-23, 8L BODY
APPROVAL
DOCUMENT CONTROL NO.
21-0078
REV. 1
D1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX9812.PDF ] | |
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