Audio Amp Includes Hands-Free Outputs November 07, 2006
Covering nearly all the bases, the TS4956 audio amplifier drives stereo headphones and loudspeakers and integrates an I2C bus control interface. The chip provides three dedicated outputs: one stereo headphone drive, one stereo loudspeaker output, and one mono line for a hands-free set. It can deliver up to 38 mW of continuous average power per channel into 16O headphone loads, or 450 mW into 8O loudspeaker loads while operating from a 3.3V supply. Via I2C selection, eight different operating modes, including a stereo loudspeaker option, and 32-step –34 dB to +12 dB digital volume control, are available. Other features include a standby current of 0.5 µA, a 10-nA shutdown current, and noise-reduction circuitry. Operating temperature range is -40°C to +85°C. Available in a lead-free, 2.5 mm x 2.4 mm 18-bump flip-chip package, price is $1.10 each/1,000. STMICROELECTRONICS, Lexington, MA. (888) 787-3550.
