AN53

ICs for TV AN5295NK 3-ch. sound signal processing single chip IC for TV (with I2C bus) s Overview The AN5295NK is a television-use 3-ch. sound signal processing IC which incorporates volume, tone control (L/R/C 3-ch.), and surround sound, sound AGC, lower sound enforce (L/R 2-ch.) functions. All of the functions (including changeover switch) including external I/ O port can be controlled by I2C bus. 1 30 Unit: mm 0.5±0.1 0.9±0.25 15 8.6±0.3 16 4.7±0.25 1.0±0.25 3.3±0.25 10.16±0.25 0.35–0.05 +0.1 26.7±0.3 s Features 3-ch. of volumes can be controlled independently (max. attenuation is 75 dB or more) Center output can be switched, ether center input or inside L+R signal (for HDTV) Lower sound enforce effect (frequency and gain) can be adjusted with external parts With L+R output 3° to 15° SDIP030-P-0400 s Applications Television s Block Diagram VREF 17 Extension I/O (H/L) DAC1 7 PS GND SDA SCV SRV SCL STB SLV STT VCC LB 29 15 14 12 13 16 25 23 L-In 30 Buffer I2C Off On I2C L+S L+R L−R PS LPF 1st amp.1 stage R−S C-sel Loop Add Add VCA Vol.+mute 19 L-Out Tone Vol. Buffer R-In 1 Buffer Off 22 2 6 8 LT Tone Vol. Buffer 11 R-Out L+R VCA On B-Out/ 28 C-In Buffer Level sense Control Bass add On Off Tone Vol. Buffer 18 C-Out 0 dB adj. 27 26 24 10 21 ADD RB CB AGC Adj. LS1 LS2 B-In B-Gain CT RT 20 3 4 5 9 1.778 1 AN5295NK s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description R-ch. input pin...