LM1972

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μPot 2-Kanal-Audio-Abschwächer mit Stummschaltung (78 dB)

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Datenblatt

document-pdfAcrobat LM1972 Pot 2-Channel 78 dB Audio Attenuator with Mute datasheet (Rev. D) (Englisch)

LM1972

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

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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	Typ	Titel		Datum
*	Data sheet	LM1972 Pot 2-Channel 78 dB Audio Attenuator with Mute datasheet (Rev. D)		20 Mär 2013

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LM1972

μPot 2-Kanal-Audio-Abschwächer mit Stummschaltung (78 dB)

LM1972

Produktdetails

Key Specifications

Key Specifications

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