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LM1973

Features: · 3-wire serial interface· Daisy-chain capability· 104dB mute attenuation·Pop and click free attenuation changesApplication· Automated studio mixing consoles·Music reproduction systems· Sound reinforcement systems· Electronic music (MIDI)· Personal computer audio controlPinoutSpecificati...

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SeekIC No. : 004394734 Detail

LM1973: Features: · 3-wire serial interface· Daisy-chain capability· 104dB mute attenuation·Pop and click free attenuation changesApplication· Automated studio mixing consoles·Music reproduction systems· So...

LM1973 Data Sheet

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Part Number:
LM1973
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/4

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Product Details

Description



Features:

· 3-wire serial interface
· Daisy-chain capability
· 104dB mute attenuation
·Pop and click free attenuation changes




Application

· Automated studio mixing consoles
·Music reproduction systems
· Sound reinforcement systems
· Electronic music (MIDI)
· Personal computer audio control




Pinout

Connection Diagram




Specifications

Supply Voltage (VDDVSS) .......... 15V
Voltage at Any Pin ..VSS − 0.2V to VDD + 0.2V
Power Dissipation (Note 3) ....... 150 mW
ESD Susceptability (Note 4) ........ 1800V
Junction Temperature ............150°C
Soldering Information
N Package (10 sec.) ............+260°C
Storage Temperature .... −65°C to +150°C

THD 0.0008 %
SNR 120 dB
Special Features 3 Channels, Digitally controlled audio attenuator
Supply Min 4.5 Volt
Supply Max 15 Volt
Equivalent Input Noise 13 uV/root(Hz)
Separation 110 dB
Interface Type Serial
Temperature Min 0 deg C
Temperature Max 70 deg C
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Description

The LM1973 is a digitally controlled 3-channel 76dB audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5dB from 0dB15.5dB, 1.0dB steps from 16dB47dB, and 2.0dB steps from 48dB 76dB, with a mute function attenuating 104dB. Its logarithmic attenuation curve can be customized through software to fit the desired application.

The performance of a Pot™ is demonstrated through its excellent Signal-to-Noise Ratio, extremely low (THD+N), and high channel separation. Each Pot 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 LM1973'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 LM1973 allows multiple Pots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application.






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