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LM1972

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具有静音功能的 μPot 2 通道 78dB 音频衰减器

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数据表

LM1972

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产品详情

Number of channels 2 Power supply (V) 4.5 to 15 Gain & attenuation (dB) 0dB to -78dB with 0.5dB steps THD + N at 1 kHz (%) 0.0008 Interchannel crosstalk at 1 kHz (dBFS) -110 Dynamic range (dB) 115 Operating temperature range (°C) 0 to 70 Features 2 Channels, Digitally controlled audio attenuator
Number of channels 2 Power supply (V) 4.5 to 15 Gain & attenuation (dB) 0dB to -78dB with 0.5dB steps THD + N at 1 kHz (%) 0.0008 Interchannel crosstalk at 1 kHz (dBFS) -110 Dynamic range (dB) 115 Operating temperature range (°C) 0 to 70 Features 2 Channels, Digitally controlled audio attenuator
SOIC (DW) 20 131.84 mm² 12.8 x 10.3
  • 3-Wire Serial Interface
  • Daisy-Chain Capability
  • 104dB Mute Attenuation
  • Pop and Click Free Attenuation Changes

Key Specifications

  • Total Harmonic Distortion +
    Noise: 0.003 % (max)
  • Frequency response: 100 kHz (−3dB) (min)
  • Attenuation range (excluding
    mute): 78 dB (typ)
  • Differential attenuation: ±0.25 dB (max)
  • Signal-to-noise ratio
    (ref. 4 Vrms): 110 dB (min)
  • Channel separation: 100 dB (min)

All trademarks are the property of their respective owners.

  • 3-Wire Serial Interface
  • Daisy-Chain Capability
  • 104dB Mute Attenuation
  • Pop and Click Free Attenuation Changes

Key Specifications

  • Total Harmonic Distortion +
    Noise: 0.003 % (max)
  • Frequency response: 100 kHz (−3dB) (min)
  • Attenuation range (excluding
    mute): 78 dB (typ)
  • Differential attenuation: ±0.25 dB (max)
  • Signal-to-noise ratio
    (ref. 4 Vrms): 110 dB (min)
  • Channel separation: 100 dB (min)

All trademarks are the property of their respective owners.

The LM1972 is a digitally controlled 2-channel 78dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB–47.5dB, 1.0dB steps from 48dB–78dB, with a mute function attenuating 104dB. Its logarithmic attenuation curve can be customized through software to fit the desired application.

The performance of a μPot is demonstrated through its excellent Signal-to-Noise Ratio, extremely low (THD+N), and high channel separation. Each μPot contains a mute function that disconnects the input signal from the output, providing a minimum attenuation of 96dB. Transitions between any attenuation settings are pop free.

The LM1972's 3-wire serial digital interface is TTL and CMOS compatible; receiving data that selects a channel and the desired attenuation level. The Data-Out pin of the LM1972 allows multiple μPots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.

The LM1972 is a digitally controlled 2-channel 78dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB–47.5dB, 1.0dB steps from 48dB–78dB, with a mute function attenuating 104dB. Its logarithmic attenuation curve can be customized through software to fit the desired application.

The performance of a μPot is demonstrated through its excellent Signal-to-Noise Ratio, extremely low (THD+N), and high channel separation. Each μPot contains a mute function that disconnects the input signal from the output, providing a minimum attenuation of 96dB. Transitions between any attenuation settings are pop free.

The LM1972's 3-wire serial digital interface is TTL and CMOS compatible; receiving data that selects a channel and the desired attenuation level. The Data-Out pin of the LM1972 allows multiple μPots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.
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* 数据表 LM1972 Pot 2-Channel 78 dB Audio Attenuator with Mute 数据表 (Rev. D) 2013年 3月 20日

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包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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