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參數(shù)資料
| 型號(hào)： | LM1972 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Pot 2-Channel 78dB Audio Attenuator with Mute |
| 中文描述： | 鍋2通道78分貝音頻衰減器的靜音 |
| 文件頁(yè)數(shù)： | 5/11頁(yè) |
| 文件大?。?/td> | 301K |
| 代理商： | LM1972 |
Typical Performance Characteristics
(Continued)
Application Information
ATTENUATION STEP SCHEME
The fundamental attenuation step scheme for the LM1972
μPot is shown in Figure 3 This attenuation step scheme,
however, can be changed through programming techniques
to fit different application requirements. One such example
would be a constant logarithmic attenuation scheme of 1dB
steps for a panning function as shown in Figure 4 The only
restriction to the customization of attenuation schemes are
the given attenuation levels and their corresponding data
bits shown in Table 1 The device will change attenuation
levels only when a channel address is recognized. When
recognized, the attenuation level will be changed corre-
sponding to the data bits shown in Table 1 As shown in Fig-
ure 6 an LM1972 can be configured as a panning control
which separates the mono signal into left and right channels.
This circuit may utilize the fundamental attenuation scheme
of the LM1972 or be programmed to provide a constant 1dB
logarithmic attenuation scheme as shown in Figure 4
THD + N vs Amplitude
DS011978-24
THD + N vs Amplitude
DS011978-25
THD + N vs Amplitude
DS011978-26
LM1972 Channel Attenuation
vs Digital Step Value
DS011978-6
FIGURE 3. LM1972 Attenuation Step Scheme
LM1972 Channel Attenuation
vs Digital Step Value
(Programmed 1.0dB Steps)
DS011978-7
FIGURE 4. LM1972 1.0dB
Attenuation Step Scheme
LM1972 Channel Attenuation
vs Digital Step Value
(Programmed 2.0dB Steps)
DS011978-8
FIGURE 5. LM1972 2.0dB Attenuation Step Scheme
www.national.com
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1972MX | Tone/Volume/Balance Control |
| LM1972M | Pot 2-Channel 78dB Audio Attenuator with Mute |
| LM1972N | Pot 2-Channel 78dB Audio Attenuator with Mute |
| LM19CIZ | 2.4V, 10uA, TO-92 Temperature Sensor |
| LM218H | Operational Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1972M | 功能描述:衰減器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰減:18 dB 容差: 阻抗: 功率額定值:30 dBm 安裝風(fēng)格:SMD/SMT 工作溫度范圍:- 40 C to + 85 C |
| LM1972M/NOPB | 功能描述:有源衰減器 RoHS:否 制造商:TriQuint Semiconductor 通道數(shù)量: 最大頻率: 阻抗: 最大 VSWR: 位數(shù): 最大工作溫度: 最小工作溫度: |
| LM1972MX | 功能描述:衰減器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰減:18 dB 容差: 阻抗: 功率額定值:30 dBm 安裝風(fēng)格:SMD/SMT 工作溫度范圍:- 40 C to + 85 C |
| LM1972MX/NOPB | 功能描述:有源衰減器 RoHS:否 制造商:TriQuint Semiconductor 通道數(shù)量: 最大頻率: 阻抗: 最大 VSWR: 位數(shù): 最大工作溫度: 最小工作溫度: |
| LM1972N | 功能描述:IC AUDIO ATTENUATOR 2CH 20-DIP RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
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