LM1973
FEATURES
- 2 3-Wire Serial Interface
- Daisy-Chain Capability
- 104d B Mute Attenuation
- Pop and Click Free Attenuation Changes
APPLICATIONS
- Automated Studio Mixing Consoles
- Music Reproduction Systems
- Sound Reinforcement Systems
- Electronic Music (MIDI)
- Personal puter Audio Control
KEY SPECIFICATIONS
- Total Harmonic Distortion + Noise: 0.003 % (max)
- Frequency response: 100 k Hz (- 3d B) (min)
- Attenuation range (excluding mute): 76 d B
(typ)
- Differential attenuation: ±0.25 d B (max)
- Signal-to-noise ratio (ref. 4 Vrms): 110 d B
(min)
- Channel separation: 110 d B (typ)
DESCRIPTION
The LM1973 is a digitally controlled 3-channel 76d B audio attenuator fabricated on a CMOS process. Each channel has attenuation steps of 0.5d B from 0d B- 15.5d B, 1.0d B steps from 16d B- 47d B, and 2.0d B steps from 48d B- 76d B, with a mute function attenuating 104d B. Its logarithmic attenuation curve can be customized through software to fit the desired application.
The performance of a μPot is...
