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MAX4469

更新时间： 2024-11-20 22:55:23
品牌 Logo 应用领域
美信 - MAXIM 放大器
页数 文件大小 规格书
14页 502K
描述
Low-Cost, Micropower, SC70/SOT23-8, Microphone Preamplifiers with Complete Shutdown

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MAX4469 数据手册

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19-1950; Rev 1; 4/01  
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
General Description  
Features  
The MAX4465–MAX4469 are micropower op amps opti-  
mized for use as microphone preamplifiers. They pro-  
vide the ideal combination of an optimized gain  
bandwidth product vs. supply current, and low voltage  
operation in ultra-small packages. The MAX4465/  
MAX4467/MAX4469 are unity-gain stable and deliver a  
200kHz gain bandwidth from only 24µA of supply cur-  
rent. The MAX4466/MAX4468 are decompensated for a  
minimum stable gain of +5V/V and provide a 600kHz  
gain bandwidth product. In addition, these amplifiers  
®
o +2.4V to +5.5V Supply Voltage Operation  
o Versions with 5nA Complete Shutdown Available  
(MAX4467/MAX4468)  
o Excellent Power-Supply Rejection Ratio: 112dB  
o Excellent Common-Mode Rejection Ratio: 126dB  
o High A  
: 125dB (R = 100kΩ)  
L
VOL  
o Rail-to-Rail Outputs  
feature Rail-to-Rail outputs, high A  
plus excellent  
VOL,  
o Low 24µA Quiescent Supply Current  
power-supply rejection and common-mode rejection  
ratios for operation in noisy environments.  
o Gain Bandwidth Product:  
200kHz (MAX4465/MAX4467/MAX4469)  
The MAX4467/MAX4468 include a complete shutdown  
mode. In shutdown, the amplifiers’ supply current is  
reduced to 5nA and the bias current to the external  
microphone is cut off for ultimate power savings. The  
single MAX4465/MAX4466 are offered in the ultra-small  
5-pin SC70 package, while the single with shutdown  
MAX4467/MAX4468 and dual MAX4469 are available in  
the space-saving 8-pin SOT23 package.  
600kHz A ≥ 5 (MAX4466/MAX4468)  
V
o Available in Space-Saving Packages  
5-Pin SC70 (MAX4465/MAX4466)  
8-Pin SOT23 (MAX4467/MAX4468/MAX4469)  
Ordering Information  
PART  
TEMP. RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
5 SC70-5  
MAX4465EXK-T  
MAX4465EUK-T  
MAX4466EXK-T  
MAX4466EUK-T  
Applications  
5 SOT23-5  
5 SC70-5  
Microphone Preamplifiers  
Hearing Aids  
5 SOT23-5  
Cellular Phones  
Ordering Information continued at end of data sheet.  
Voice-Recognition Systems  
Digital Dictation Devices  
Headsets  
Typical Operating Circuit  
Portable Computing  
V
CC  
Pin Configurations  
SHDN  
R
BIAS  
MIC_BIAS  
IN+  
TOP VIEW  
C
R
BIAS  
R
DC  
1
2
3
5
V
CC  
IN+  
GND  
IN-  
R
BIAS  
OUT  
MAX4465  
MAX4466  
C
IN  
IN  
IN-  
MAX4467  
MAX4468  
C
BYPASS  
4
OUT  
R
DC  
GND  
SC70/SOT23  
MICROPHONE  
CAPSULE  
Pin Configurations continued at end of data sheet.  
R
FB  
MAX4467/MAX4468 TYPICAL OPERATING CIRCUIT WITH  
COMPLETE SHUTDOWN  
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.  
________________________________________________________________ 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.  
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