Datasheet Texas Instruments LM1973M/NOPB

LM1973
www.ti.com SNAS093B – DECEMBER 1994 – REVISED MARCH 2013 LM1973 µPot 3-Channel 76dB Audio Attenuator with Mute
Check for Samples: LM1973 FEATURES 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
0dB–15.5dB, 1.0dB steps from 16dB–47dB, 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. 1 2 3-Wire Serial Interface
Daisy-Chain Capability
104dB Mute Attenuation
Pop and Click Free Attenuation Changes APPLICATIONS Automated Studio Mixing Consoles
Music Reproduction Systems
Sound Reinforcement Systems
Electronic Music (MIDI)
Personal Computer Audio Control KEY SPECIFICATIONS Total Harmonic Distortion + Noise: 0.003 %
(max)
Frequency response: 100 kHz (-3dB) (min)
Attenuation range (excluding mute): 76 dB
(typ)
Differential attenuation: В±0.25 dB (max)
Signal-to-noise ratio (ref. 4 Vrms): 110 dB …