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TDA8808T Arkusz danych(PDF) 5 Page - NXP Semiconductors

Numer części TDA8808T
Szczegółowy opis  Photo diode signal processor for compact disc players
Download  22 Pages
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Producent  PHILIPS [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8808T Arkusz danych(HTML) 5 Page - NXP Semiconductors

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November 1987
5
Philips Semiconductors
Product specification
Photo diode signal processor for compact
disc players
TDA8808T
TDA8808AT
Pin functions
PIN
MNEMONIC
DESCRIPTION
1
GCHF
Gain control input of HF amplifier. Current output from HF amplitude detector
2VP
Positive supply voltage
3
HFout
HF amplifier and equalizer voltage output
4
DET
HF detector voltage input
5
Sc
Starting up capacitor input
6
Si/RD
On/off control (start input); ready signal output (starting up procedure successful)
7
Beq
Equalizer reference current input
8
Bgc
DC and LF gain control reference current input
9
FOC START
Focus normalizing circuit starting current
10
PLLH
PLL on hold output
11
TL
Track loss output
12
DODS
Drop out detector suppression input
13
Vext
TDA8808T
Negative supply connection for FE and FElag output stage; also
substrate connection
TDA8808AT
Positive supply connection for FE and FElag output stage
14
LPF
Low pass filter for Iret, used in track loss (TL) detector and LF gain control
15
FE
Current output of normalized, switched focus error signal
16
FElag
Current output of switched focus error signal, intended for lag network.
17
LO
Laser amplifier current output
18
LM
Laser monitor diode input
19
GCLF
Gain control input for AC and LF amplifiers. Current output from LF amplitude detector
20
Re2
Summation of amplified currents from D3 and D4
21
Re1
Summation of amplified currents from D1 and D2
23, 22
D1, D2
Current inputs to DC and LF photo diode amplifier
24, 25
D3, D4
Current inputs to DC and LF photo diode amplifier
26
HFin
Current input to HF amplifier
27
GND
Ground connection of device: also substrate connection for TDA8808AT
28
DEC
Decoupling input (internal bypass)


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