TZA1038HW,118 NXP Semiconductors, TZA1038HW,118 Datasheet - Page 28

• Manufacturer Part Number: TZA1038HW,118
• Description: IC DVD SIGNAL PROC 48-HTQFP
• Manufacturer: NXP Semiconductors

Specifications of TZA1038HW,118

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935273843118; TZA1038HW-T; TZA1038HW-T

Philips Semiconductors
The bandwidth of the DPD signal is limited by the 100 kHz
phase detector integration filters and the bandwidth of the
output stages (100 kHz for S1 and S2).
The input signals used for DPD depend on the
programmed radial tracking mode (bits RT_mode[2:0]):
DPD
DPD
Range of
FTC = (S1
For S1 and S2 bit RAD_pol is assumed to be set to logic 1.
Otherwise the signals appearing at S1 and S2 will be
swapped.
7.5.5.2
With bit DOCEN = 1, drop-out concealment is activated
and the S1 and S2 outputs change:
At low signal levels (SUM < DOC
of
S1
S2
Where:
2003 Sep 03
------
T
P
t
The common mode level (I
the CA signal
The scaling changes.
I
C = concealment multiplier, C = 0 to 1 when CA is
0 to DOC
CA = OA + OB + OC + OD
DOC
High speed advanced analog DVD signal
processor and laser supply
DPD
DPD
------
T
(FS)(DPD)(DOC)
> 0 if A,C phase leads with respect to D,B phase.
P
t
mode
mode
is reduced smoothly.
= C
= C
threshold
= DPD2:
= DPD4: 0.5[
------
T
DPD signals (DVD-ROM mode) with
drop-out concealment
P
threshold
t
S2)
I
(FS)(DPD)(DOC)
is from 0.5 to + 0.5.
I
is typically 3 A.
(FS)(DPD)(DOC)
is the full scale range
(R
------
T
P
t
FTC
(A,D) or DPD2:
------
T
P
t
+ FTCREF)
(A,D) +
REFRAD
------
T
------
T
P
t
P
t
threshold
+ 0.25
------
T
+ 0.25
) is now determined by
P
t
(C,B)]
------
T
), the contribution
P
t
(A + C, B + D)
CA.
CA.
28
For S1 and S2 bit RAD_pol is assumed to be set to logic 1.
Otherwise the signals appearing at S1 and S2 will be
swapped.
The DPD detection can not work properly when the input
signal becomes very small. The output of the DPD may
then show a significant offset. The DOC may not conceal
this offset completely because:
7.5.5.3
When the three-beam system is used, the radial signals
S1 and S2 can be composed from inputs E and F.
FTC = (S1
to 600 kHz).
For S1 and S2 bit RAD_pol is assumed to be set to logic 1.
Otherwise the signals appearing at S1 and S2 will be
swapped.
7.5.5.4
Top hold push-pull method is supported but only in
conjunction with a compatible decoder. The peak hold
function is executed in the decoder, by measuring the
mirror levels of the gap-zones in each header. The
TZA1038HW will compensate for offset errors in two ways:
The correction values must be calculated in the decoder
and programmed via the serial bus. The method is called
the enhanced push-pull method.
For S1 and S2 bit RAD_pol is assumed to be set to logic 1.
Otherwise the signals appearing at S1 and S2 will be
swapped.
S1
S2
DOC is gradually controlled from the CA signal
The CA signal may not become 0 during disc-defect.
The DC offset from the pick-up can be compensated by
means of a DAC (C
The dynamic offsets can be compensated by means of
the multiplier ratio .
PP
PP
=
=
A
A
LFR
LFR
Three-beam push-pull (CD mode)
Enhanced push-pull
S2)
E OPUREF
---------------------------------------------------------------------------------------- -
F OPUREF
--------------------------------------------------------------------------------------- -
R
–
–
FTC
OFFSx
+ FTCREF (bandwidth limited
) in each channel
+
+
R
R
LF
LF
LFR
LFR
TZA1038HW
OFFS
OFFS
Product specification
+
–
R
R
OFFSE
OFFSF