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| TDA8809T |
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 PHILIPS
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4 page 
November 1987 4 Philips Semiconductors Product specification Radial error signal processor for compact disc players TDA8809T PINNING PIN MNEMONIC DESCRIPTION 1VP Positive supply voltage 2Cosc1 Frequency setting capacitors for oscillator 3Cosc2 4Rwob Wobble generator input 5Rosc Biassing resistor for oscillator frequency and internal amplitude 6 DIV4 Divide-by-4 input 7 REdig Digital output of sign (Re2 - Re1) 8B3 Input control bits for off-, catch-, play-status and DAC output current 9B2 10 B1 11 B0 12 Vext(+) Positive external voltage input 13 Vext(−) Negative external voltage input (also substrate connection) 14 GND Negative supply connection 15 RADout Current output of amplified (Re2 - Re1) input currents 16 REin Radial error input 17 RElag Voltage output of integrated (Re2 - Re1) input currents 18 Lag Connection of integrator capacitor for (Re1 - Re2) input currents 19 Lead Lead output 20 Vref Internal reference voltage output 21 AGC Gain control input for radial error signal 22 RDAC Biassing resistor for current output for track jumping (31 ⁄2 bits) 23 offset in Offset control input for radial offset 24 offset out Offset control output for radial offset 25 CLPF Low-pass filter for Re1 and Re2, used for radial offset control 26 CHPF High-pass filter for Re1 and Re2, used for radial offset control 27 Re1 Input for amplified currents from photo-diodes D1 and D2 28 Re2 Input for amplified currents from photo diodes D3 and D4 Fig.2 Pinning diagram. |
