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File name pt2253 volume control.pdf

Princeton Technology Corp. Electronic Volume Controller IC DESCRIPTION Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2253A PT2253A is an electronic volume controller IC utilizing CMOS Technology specially designed for use on audio equipments. It has two (2) built-in channels making it ideally suitable for mono and stereo sound applications. PT2253A provides a wide frequency response range and a very low harmonic distortion to mention a few; thereby guaranteeing a highly effective and reliable performance. FEATURES ! ! ! ! ! ! ! ! ! ! CMOS Technology Low Power Consumption Operating Voltage Range : Vcc = 6 ~ 12 V (Backup Voltage is up to 4 V) 0dB to -68dB attenuation controlled by 2dB/step 2 Channels in each chip Capable to control attenuation by a built-in oscillator and Up/Down Pin Single Power Supply or Dual Power Supplies of (+) and (-) can be used Wide Frequency Response Range Very Low Harmonic Distortion Available in 16 pin, DIP Package APPLICATIONS ! ! Audio Equipment Volume Control Traditional VR Replacement PT2253A v 2.6 Page 1 Revised October 1999 Princeton Technology Corp. Electronic Volume Controller IC PIN CONFIGURATION V ss L -O U T 1 L -IN 1 A -G N D L -IN 2 L -O U T 2 IN H DCO 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 V cc Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2253A R -O U T 1 R -IN 1 A -G N D R -IN 2 R -O U T 2 U /D OSC P T 2 2 53 A ORDER INFORMATION Valid Part Number PT2253A Package Type 16 Pins, DIP PT2253A v 2.6 Page 2 Revised October 1999 Princeton Technology Corp. Electronic Volume Controller IC APPLICATION CIRCUIT 1 Dual Power Supply (L-Channel Only) Vss -6V Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2253A 3 10uF + + 4 1 LM358 _ 8 2 VDD +6V 10uF + V ss Vcc 10uF INPUT GROUND 10uF OUTPUT + + 10K fosc = RS 3RX 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 L -O U T 2 R -O U T 2 IN H DCO U /D + OSC CX 4.7 P T 2 253A 100K RS 1 (0.7)(CX)( RX) 33K RX 1N4148 UP SW DOWN SW 1N4148 + 1uF PT2253A v 2.6 Page 3 Revised October 1999 Princeton Technology Corp. Electronic Volume Controller IC APPLICATION CIRCUIT 2 Dual Power Supply (L-Channel Only) Vss -6V Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2253A 4 3 10uF LM358 8 1 + 2 68pF VDD +6V 10uF + 0.15uF 51K V ss V cc 110K 10uF INPUT GROUND OUTPUT + 10uF + 10K fosc = RS 3RX 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 L -O U T 2 R -O U T 2 IN H D CO U /D O SC CX 4.7 PT2253A 100K RS 1 (0.7)(CX)( RX) 33K RX 1N4148 UP SW 1N4148 1uF DOWN SW Note: Since the Buffer Amp between Att-1 and Att-2 is already 10dB Voltage Gain, higher input level may cause OP Amp's Output Clipping. To avoid unwanted distortion, the input signal level applied at IN-1 should not be over 1 Vrms. PT2253A v 2.6 Page 4 Revised October 1999 A-GN D L -IN 2 R -IN 2 R -O U T 2 U /D OSC V cc + 4