TDA8808AT Philips Semiconductors, TDA8808AT Datasheet - Page 14

• Manufacturer Part Number: TDA8808AT
• Description: Photo diode signal processor for compact disc players
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes to the characteristics
1. Voltage output signal V
2. Voltage output signal V
3. Phase of input/output signal, group delay and flatness measured at I
4. HF part output voltage for closed loop conditions; f
5. HF part output voltage for closed loop conditions; f
6.
7.
8. S
9. LF part reference current I
10. FE output current measured at
11. Laser supply transconductance for DC
November 1987
SYMBOL
LO
Photo diode signal processor for compact
disc players
Voltage output signal V
Voltage output signal V
Flatness:
M
Where:
Measurement taken at V
Where:
Measurement taken at V
Measurement taken at V
Measurement taken at I
Group delay
P
P
G
6
1
1
2
LDC
is the measured value of
is the measured value of V
is the measured value of
is the measured value of
=
For AC (note 12) delay time
*
**
------------- - 0
V
I
LO
LM
=
Value to be fixed.
X = don’t care.
(1) are the current levels at f
(2) are the current levels at f
(1) are the current levels at f
(2) are the current levels at f
max
=
–
PARAMETER
------- -
dw
d
I
LO
min
O1
O2
O1
O2
DT
GCLF
GCLF
GCLF
; f
.
measured at f
measured at f
measured at f
measured at f
ret
> I
2 mA
and low-pass filter output voltage for closed loop conditions.
DT3;
S
= 3,5 V.
= 3,5 V.
= 3,5 V.
O1
50 kHz.
1
V
.
------------------------------------------ -
I
------------------------------------------ -
I
GCLF
I
------- - 1 1 I
D1
D3
DT
4
V
DET
–
1
1
I
I
=
Re1
Re2
HFin
HFin
HFin
HFin
< V
+
+
3 5 V and Si
I
I
D2
D4
i
i
i
i
DETn2
= 700 kHz; I
= 100 kHz; I
= 1 MHz; I
= 100 kHz; I
1
1
= 25 kHz.
= 1 kHz.
= 25 kHz.
= 1 kHz.
Bgc
1
1
CONDITIONS
or V
HFin
HFin
-------------------------------------------- -
-------------------------------------------- -
I
I
D1
D3
14
HFin(p-p)
= 500 kHz.
= 0,1 to 1 MHz.
DET
HFin(p-p)
HFin(p-p)
HFin(p-p)
I
I
RD
2
Re1
2
Re2
> V
+
+
=
I
I
2
2
= 7 A; V
D2
D4
DETp2
HIGH Z I
= 7 A; V
= 7 A; V
= 7 A; V
2
2
.
HFin(p-p)
MIN.
GCHF
;
GCHF
GCHF
GCHF
ST
= 1 A; V
= 2,4 V.
*
=
= 2,4 V.
= 2,4 V.
= 2,4 V.
V
------------------------------- -
R
FOC START
TYP.
FOC START
GCHF
= 4 V.
Product specification
TDA8808AT
MAX.
TDA8808T
ns
UNIT