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| Princeton Technology Corp. Electronic Volume Controller IC DESCRIPTION Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A PT2254A is an electronic volume controller IC utilizing CMOS Technology specially designed for use on audio equipment. It has two built-in channels making it highly suitable for mono and stereo sound applications. Through the specially designated signals that are applied externally to the data, clock and strobe input pins, PT2254A can control attenuation and channel balance. FEATURES ! ! ! ! ! ! ! ! CMOS Technology Low Power Consumption High Operating Voltage Range : Vcc = 4 ~ 12 V 0dB to -68dB attenuation controlled by 2dB/step 2 Channels in each chip Single Power Supply or Dual Power Supplies of (+) and (-) can be used Attenuation can be controlled by signals attached to the Strobe, Data and Clock Pins. Available in 16 Pins, DIP & SO Package APPLICATIONS ! Audio Equipment Volume Control ! Multi-Media PC Audio Control PT2254A v 2.4 Page 1 Revised August 1998 Princeton Technology Corp. Electronic Volume Controller IC PIN CONFIGURATION Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A PT2254A v 2.4 Page 2 Revised August 1998 Princeton Technology Corp. Electronic Volume Controller IC APPLICATION CIRCUIT 1 Dual Power Supply (Only One Channel for Reference) V ss -6V 10 F Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A 4 3 2 L M 35 8 8 1 V D D +6V 10 F 10 F V ss V cc L -O U T 1 R -O U T 1 L -IN 1 A -G N D L -IN 2 R -IN 1 A -G N D R -IN 2 IN PU T A -G N D O U T PU T ST 10 F + + L -O U T 2 R -O U T 2 ST GND D ATA CK PT 2254A CK D ATA PT2254A v 2.4 Page 3 Revised August 1998 Princeton Technology Corp. Electronic Volume Controller IC APPLICATION CIRCUIT 2 Dual Power Supply (Only One Channel for Reference) V ss -6V 10 F 4 3 2 Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A 1 L M 3 58 8 V D D +6V 10 F 10 F V ss V cc 68 p F L -O U T 1 R -O U T 1 L -IN 1 A -G N D L -IN 2 R -IN 1 A -G N D R -IN 2 51 K 110 K 0.15 uF IN PU T A -G N D O U T PU T ST 10 F + + L -O U T 2 R -O U T 2 ST GND D ATA CK PT 2254A CK D ATA Note: The OP and R,C components form a bandpass filter. Its fL(Low Frequency at -3dB point) is about 20 Hz, fH (High Frequency at -3dB point) is about 22 KHz and the flat gain (A0) is 3.15. Therefore, there is a limitation on the input voltage source: (i) The amplitude should not be more than 1 Vrms, (ii) The bandwidth of input should be within the range of 20 to 22 K; otherwise too much distortion will be generated. PT2254A v 2.4 Page 4 Revised August 1998 Princeton Technology Corp. Electronic Volume Controller IC APPLICATION CIRCUIT 3 Single Power Supply V cc (4 ~ 12 V ) Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A 3 + 8 1 L M 35 8 2 - 4 V ss 10 K 10 F V cc L -O U T 1 R -O U T 1 L -IN 1 A -G N D R -IN 1 A -G N D R -IN 2 IN P U T 10 K 10 0 + F + L -IN 2 O U T PUT ST + 10 F L -O U T 2 R -O U T 2 ST GND D ATA CK P T 225 4A CK D ATA PT2254A v 2.4 Page 5 Revised August 1998 Princeton Technology Corp. Electronic Volume Controller IC APPLICATION CIRCUIT 4 Single Power Supply V cc (4 ~ 12 V ) 3 Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A + 8 1 2 L M 358 - 4 68 p F 0.15 uF V ss 10 K 10 F V cc 51 K 11 0 K L -O U T 1 R -O U T 1 L -IN 1 A -G N D R -IN 1 A -G N D R -IN 2 IN P U T 10 K 10 0 + F + L -IN 2 O U T PU T ST + 10 F L -O U T 2 R -O U T 2 ST GND D ATA CK PT 2254A CK D ATA Note: The OP and R,C components form a bandpass filter. Its fL(Low Frequency at -3dB point) is about 20 Hz, fH (High Frequency at -3dB point) is about 22 KHz and the flat gain (A0) is 3.15. Therefore, there is a limitation on the input voltage source: (i) The amplitude should not be more than 1 Vrms, (ii) The bandwidth of input should be within the range of 20 to 22 K; otherwise too much distortion will be generated. PT2254A v 2.4 Page 6 Revised August 1998 Princeton Technology Corp. Electronic Volume Controller IC ORDER INFORMATION Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2254A Valid Part Number PT2254A PT2254AS Package Type 16 Pins, DIP 16 Pins, SOP PT2254A v 2.4 Page 7 Revised August 1998 |
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