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參數(shù)資料
| 型號(hào)： | LM1972N |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Pot 2-Channel 78dB Audio Attenuator with Mute |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 301K |
| 代理商： | LM1972N |
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1972N | 制造商:Texas Instruments 功能描述:AUDIO ATTENUATOR 78DB 1972 DIP20 |
| LM1972N/NOPB | 制造商:Texas Instruments 功能描述:Digital Attenuator 104dB Attenuation 20-Pin PDIP Rail |
| LM1973 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:レPot⑩3-Channel 76dB Audio Attenuator with Mute |
| LM1973M | 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 |
| LM1973M/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: |
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