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參數(shù)資料
| 型號： | SSM2167Z-EVAL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR SSM2167 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 音頻，麥克風(fēng)前置放大器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | SSM2167 |
| 主要屬性： | 可變壓縮，噪音選通，0.2% THD + N，可調(diào)式壓縮比 |
| 次要屬性： | 自動(dòng)限制性能可防止 ADC 過載，3 V（2.5 ~ 5.5 V） |
| 已供物品： | 板 |
| 產(chǎn)品目錄頁面： | 775 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | SSM2167-1RMZ-REELDKR-ND - IC PREAMP AUDIO MONO AB 10MSOP SSM2167-1RMZ-REELCT-ND - IC PREAMP AUDIO MONO AB 10MSOP SSM2167-1RMZ-REELTR-ND - IC PREAMP AUDIO MONO AB 10MSOP |
Low Voltage Microphone Preamplifier with
Variable Compression and Noise Gating
Data Sheet
SSM2167
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2001–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Complete microphone conditioner in a 10-lead package
Single 3 V operation
Low shutdown current < 2 A
Adjustable noise gate threshold
Adjustable compression ratio
Automatic limiting feature prevents ADC overload
Low noise and distortion: 0.2% THD + N
20 kHz bandwidth
APPLICATIONS
Desktop, portable, or palmtop computers
Telephone conferencing
Communication headsets
Two-way communications
Surveillance systems
Karaoke and DJ mixers
GENERAL DESCRIPTION
The SSM2167 is a complete and flexible solution for conditioning
microphone inputs in personal electronics and computer audio
systems. It is also excellent for improving vocal clarity in com-
munications and public address systems. A low noise voltage
controlled amplifier (VCA) provides a gain that is dynamically
adjusted by a control loop to maintain a set compression charac-
teristic. The compression ratio is set by a single resistor and can
be varied from 1:1 to over 10:1 relative to the fixed rotation
point. Signals above the rotation point are limited to prevent
overload and to eliminate popping. A downward expander (noise
gate) prevents amplification of background noise or hum. This
results in optimized signal levels prior to digitization, thereby
eliminating the need for additional gain or attenuation in the
digital domain. The flexibility of setting the compression ratio
and the time constant of the level detector, coupled with two
values of rotation point, make the SSM2167 easy to integrate in
a wide variety of microphone conditioning applications.
The device is available in a 10-lead MSOP package, and is
guaranteed for operation over the extended industrial
temperature range of 40°C to +85°C.
PIN CONFIGURATION
GND
1
VCAIN 2
SHUTDOWN
3
BUFOUT 4
INPUT
5
VDD
10
OUTPUT
9
COMPRESSION RATIO
8
GATE THRS
7
AVG CAP
6
SSM2167
TOP VIEW
(Not to Scale)
02628-
001
Figure 1. 10-Lead MSOP (RM Suffix)
LIMITING
REGION
LIMITING
THRESHOLD
(ROTATION POINT)
COMPRESSION
REGION
1
r
1
DOWNWARD
EXPANSION
THRESHOLD
(NOISE GATE)
DOWNWARD
EXPANSION
REGION
VCA GAIN
VDE
VRP
OU
TP
U
T
(
dB
)
INPUT (dB)
02628-
002
Figure 2. General Input/Output Characteristics
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| SSM2167Z-EVAL | 制造商:Analog Devices 功能描述:SSM2167, MICROPHONE PREAMPLIFIER, EVALUA |
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