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PT2256-S Datasheet(PDF) 5 Page - Princeton Technology Corp |
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PT2256-S Datasheet(HTML) 5 Page - Princeton Technology Corp |
5 / 21 page Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw PT2256 V1.7 - 5 - August, 2006 Electronic Volume Controller IC PT2256 FUNCTION DESCRIPTION ATTENUATION The PT2256 volume control circuit consists of ladder resistors and analog switches. The Tap for loudness function is connected to the Step 10 (-20dB). When the (3.9KΩ) resistor is connected between LT and AGND pins, the attenuation is given in table below. The equivalent circuit is shown below: Step Attenuation (dB) Step Attenuation (dB) 0 0 16 -32 1 -2 17 -34 2 -4 18 -36 3 -6 19 -38 4 -8 20 -40 5 -10 21 -42 6 -12 22 -46 7 -14 23 -50 8 -16 24 -54 9 -18 25 -58 10 -20 26 -62 11 -22 27 -66 12 -24 28 -70 13 -26 29 -74 14 -28 30 -78 15 -30 31 ∞ OUT IN LT AGND Step 0 Step 1 Step 9 Step 10 Step 11 Step 31 Step 30 29KΩ 22KΩ Step 2 Note: Step 22 has an initial value of -46dB. |
Similar Part No. - PT2256-S |
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Similar Description - PT2256-S |
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