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參數(shù)資料
| 型號： | SSM2166SZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PREAMP AUDIO MONO MIC 14SOIC |
| 產(chǎn)品變化通告： | Material Change 25/Mar/2009 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | AB 類 |
| 輸出類型： | 1-通道（單聲道） |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 特點： | 麥克風(fēng) |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 14-SOICN |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 775 (CN2011-ZH PDF) |
| 其它名稱： | SSM2166SZ-REEL7DKR |
SSM2166
Data Sheet
Rev. E | Page 16 of 20
SETUP SUMMARY
The transfer condition of Figure 2 has been implemented. For
inputs below the 100 μV noise gate threshold, circuit and back-
ground noise is minimized. Above it, the output increases at a
rate of 1 dB for each 2 dB input increase until the 500 mV rotation
point is reached at an input of approximately 15 mV. For higher
inputs that drive the output beyond 500 mV, limiting occurs
and there is little further increase. The SSM2166 processes the
output of the buffer, which in the previous example is 20 dB, or
10× the input level. Use the oscilloscope to ensure that the
buffer is not being driven into clipping with the highest expected
input peaks. Always take the minimum gain in the buffer consis-
tent with the average source level and crest factor (ratio of peak
to rms). The wide program range of the SSM2166 makes it
useful in many applications other than microphone signal
conditioning.
Table 6. Initial Potentiometer Settings
Function
Potentiometer
Range
Initial Position
Initial Resistance
Effect of Change
Gain Adjust (VCA)
R10
0 k to 20 k
CCW
0
0 dB; CW to increase VCA gain
Rotation Point
R3
0 k to 50 k
CCW
0
1 V; CW to reduce rotation point
Compression Point
R6
0 k to 100 k
CCW
0
1:1; CW to increase compression
Noise Gate
R7
0 k to 1 M
CW
1 M
300 V; CCW to increase threshold
Table 7. Demonstration Board Parts List
Component
Value
Description
R1
10 k resistor
Feedback
R2
10 k resistor
Input
R3
50 k potentiometer
Rotation point, adjust
500 resistor
Rotation point, fixed
R5
0 resistor
Compression ratio, fixed
R6
100 k potentiometer
Compression ratio, adjust
R7
1 M potentiometer
Noise gate, adjust
R8
500 resistor
Noise gate, fixed
R9
1 k resistor
Gain adjust, fixed
R10
20 k potentiometer
Gain adjust
R11
330 resistor
Mute
R12
100 k resistor
Power-down, pull-up
C1
0.1 F capacitor
Input dc block
C2
1 F capacitor
Buffer low F, G = 1
C3
0.1 F capacitor
+V bypass
C4
2.2 F to 22 F capacitor
Average capacitor
C5
0.01 F capacitor
Mute click suppress
C6
10 F capacitor
Coupling
C7
10 F capacitor
VCA noise/dc balance
IC1
MIC preamp
IC2
OP113, IC
Operational amplifier, output buffer
S1
SPST, Switch
Mute
J1
1/8-inch mini phone plug jumper
MIC input
J2
RCA female jumper
Output jack
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