參數(shù)資料
型號: SSM2166SZ
廠商: Analog Devices Inc
文件頁數(shù): 6/20頁
文件大小: 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: 56
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: 管件
SSM2166
Data Sheet
Rev. E | Page 14 of 20
00357-
026
IC2
IC1
Figure 27. Evaluation Board Topside Silkscreen (Not to Scale)
00357-
027
Figure 28. Evaluation Board Topside Metallization (Not to Scale)
00357-
028
Figure 29. Evaluation Board Backside Metallization (Not to Scale)
EVALUATION BOARD EXAMPLES
To illustrate how easy it is to program the SSM2166, a practical
example is provided. The SSM2166 was used to interface an
electret-type microphone to a postamplifier. The evaluation
board or the circuit configuration shown in Figure 26 can be
used. The signal from the microphone was measured under
actual conditions to vary from 1 mV to 15 mV. The postamplifier
requires no more than 500 mV at its input. The required gain
from the SSM2166 is, therefore
GTOTAL = 20 × log(500/15) = 30 dB
The input buffer gain is set to 20 dB, and the VCA gain is adjusted
to 10 dB. The limiting or rotation point is set at 500 mV output.
A 2:1 compression ratio and a noise gate threshold that operates
below 100 V is also used. These objectives are summarized in
Table 5. The transfer characteristic implemented is illustrated in
Table 5. Objective Specifications
Parameter
Value
Input Range
1 mV to 15 mV
Output Range
To 500 mV
Limiting Level
500 mV
Compression
2:1
Buffer Gain
20 dB
VCA Gain
10 dB
Noise Gate
100 V
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