전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

SSM2166S 데이터시트(PDF) 8 Page - Analog Devices

부품명 SSM2166S
상세설명  Microphone Preamplifier with Variable Compression and Noise Gating
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

SSM2166S 데이터시트(HTML) 8 Page - Analog Devices

Back Button SSM2166S Datasheet HTML 4Page - Analog Devices SSM2166S Datasheet HTML 5Page - Analog Devices SSM2166S Datasheet HTML 6Page - Analog Devices SSM2166S Datasheet HTML 7Page - Analog Devices SSM2166S Datasheet HTML 8Page - Analog Devices SSM2166S Datasheet HTML 9Page - Analog Devices SSM2166S Datasheet HTML 10Page - Analog Devices SSM2166S Datasheet HTML 11Page - Analog Devices SSM2166S Datasheet HTML 12Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 16 page
background image
REV. B
–8–
SSM2166
10
0%
100
90
100mV
1S
–6dBV
–66dBV
–85dBV
Figure 5b. RMS Level Detector Performance
with CAVG = 22
µF
Control Circuitry
The output of the rms level detector is a signal proportional to
the log of the true rms value of the buffer output with an added
dc offset. The control circuitry subtracts a dc voltage from this
signal, scales it, and sends the result to the VCA to control the
gain. The VCA’s gain control is logarithmic—a linear change in
control signal causes a dB change in gain. It is this control law
that allows linear processing of the log rms signal to provide the
flat compression characteristic on the input/output characteristic
shown in Figure 3.
Compression Ratio
Changing the scaling of the control signal fed to the VCA causes
a change in the circuit’s compression ratio, “r.” This effect is
shown in Figure 6. The compression ratio can be set by con-
necting a resistor between the COMP RATIO pin (Pin 10) and
GND. Lowering RCOMP gives smaller compression ratios as
indicated in TPC 3, with values of about 17 k
Ω or less resulting
in a compression ratio of 1:1. AGC performance is achieved
with compression ratios between 2:1 and 15:1, and is dependent
on the application. A 100 k
Ω potentiometer may be used to
allow this parameter to be adjusted. On the evaluation board
(Figure 12), an optional resistor can be used to set the compres-
sion equal to 1:1 when the wiper of the potentiometer is at its
full CCW position.
INPUT – dB
VDE
VRP
15:1
5:1
2:1
1:1
1
1
VCA GAIN
Figure 6. Effect of Varying the Compression Ratio
Rotation Point
An internal dc reference voltage in the control circuitry, used to
set the rotation point, is user specified, as illustrated in TPC 7.
The effect on rotation point is shown in Figure 7. By varying a
resistor, RROT PT, connected between the positive supply and the
ROTATION POINT SET pin (Pin 11), the rotation point may
be varied from approximately 20 mV rms to 1 V rms. From the
figure, the rotation point is inversely proportional to RROT PT.
For example, a 1 k
Ω resistor would typically set the rotation
point at 1 V rms, whereas a 55 k
Ω resistor would typically set
the rotation point at approximately 30 mV rms.
Since limiting occurs for signals larger than the rotation point
(VIN > VRP), the rotation point effectively sets the maximum
output signal level. It is recommended that the rotation point be
set at the upper extreme of the range of typical input signals so
that the compression region will cover the entire desired input
signal range. Occasional larger signal transients will then be
attenuated by the action of the limiter.
VDE
VRP1
INPUT – dB
VRP2 VRP3
VCA GAIN
1
1
r:1
Figure 7. Effect of Varying the Rotation Point
VCA Gain Setting and Muting
The maximum gain of the SSM2166 is set by the GAIN ADJUST
pin (Pin 2) via RGAIN. This resistor, with a range between 1 k
and 20 k
Ω, will cause the nominal VCA gain to vary from 0 dB
to approximately 20 dB, respectively. Setting the VCA gain to
its maximum can also be achieved by leaving the GAIN ADJUST
pin in an OPEN condition (no connect). Figure 8 illustrates the
effect on the transfer characteristic by varying this parameter. For
low level signal sources, the VCA should be set to maximum gain
using a 20 k
Ω resistor.


유사한 부품 번호 - SSM2166S

제조업체부품명데이터시트상세설명
logo
Analog Devices
SSM2166S AD-SSM2166S Datasheet
214Kb / 15P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. A
SSM2166S AD-SSM2166S Datasheet
549Kb / 20P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. D
SSM2166S-REEL AD-SSM2166S-REEL Datasheet
549Kb / 20P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. D
SSM2166S-REEL7 AD-SSM2166S-REEL7 Datasheet
549Kb / 20P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. D
SSM2166SZ AD-SSM2166SZ Datasheet
437Kb / 13P
   Microphone Preamplifier
More results

유사한 설명 - SSM2166S

제조업체부품명데이터시트상세설명
logo
Analog Devices
SSM2166 AD-SSM2166 Datasheet
214Kb / 15P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. A
SSM2166 AD-SSM2166_15 Datasheet
605Kb / 20P
   Microphone Preamplifier with Variable Compression and Noise Gating
SSM2165 AD-SSM2165_15 Datasheet
338Kb / 12P
   Microphone Preamplifier with Variable Compression and Noise Gating
SSM2166 AD-SSM2166_08 Datasheet
549Kb / 20P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. D
SSM2165 AD-SSM2165 Datasheet
163Kb / 10P
   Microphone Preamplifier with Variable Compression and Noise Gating
REV. A
SSM2167-1RMZ-R7 AD-SSM2167-1RMZ-R7 Datasheet
216Kb / 12P
   Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating
Rev. G
SSM2167 AD-SSM2167 Datasheet
121Kb / 8P
   Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating
REV. A
SSM2167-1RMZ-R7 AD-SSM2167-1RMZ-R7 Datasheet
216Kb / 12P
   Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating
Rev. G
SSM2167 AD-SSM2167_07 Datasheet
275Kb / 12P
   Low Voltage Microphone Preamplifier with Variable Compression and Noige Gating
Rev. C
SSM-2015 AD-SSM-2015 Datasheet
264Kb / 5P
   LOW NOISE MICROPHONE PREAMPLIFIER
REV. B
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com