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| 型號： | TZA1038HW,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 21/45頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DVD SIGNAL PROC 48-HTQFP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | * |
| 類型： | * |
| 應(yīng)用： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-HTQFP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 935273843118 TZA1038HW-T TZA1038HW-T-ND |
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2003 Sep 03
28
Philips Semiconductors
Product specication
High speed advanced analog DVD signal
processor and laser supply
TZA1038HW
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]):
DPDmode = DPD2:
(A,D) or DPD2:
(A + C,B+D)
DPDmode = DPD4: 0.5[
(A,D) +
(C,B)]
Range of
is from
0.5 to + 0.5.
> 0 if A,C phase leads with respect to D,B phase.
FTC = (S1
S2) × (R
FTC + FTCREF)
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
DPD signals (DVD-ROM mode) with
drop-out concealment
With bit DOCEN = 1, drop-out concealment is activated
and the S1 and S2 outputs change:
The common mode level (IREFRAD) is now determined by
the CA signal
The scaling changes.
At low signal levels (SUM < DOCthreshold), the contribution
of
is reduced smoothly.
S1DPD =C × I(FS)(DPD)(DOC) ×
+ 0.25
× CA.
S2DPD = C × I(FS)(DPD)(DOC) ×
+ 0.25
× CA.
Where:
I
(FS)(DPD)(DOC) is the full scale range
C = concealment multiplier, C = 0 to 1 when CA is
0 to DOCthreshold
CA =OA+OB+OC+OD
DOCthreshold is typically 3 A.
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:
DOC is gradually controlled from the CA signal
The CA signal may not become 0 during disc-defect.
7.5.5.3
Three-beam push-pull (CD mode)
When the three-beam system is used, the radial signals
S1 and S2 can be composed from inputs E and F.
FTC = (S1
S2) × RFTC + FTCREF (bandwidth limited
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
Enhanced push-pull
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 DC offset from the pick-up can be compensated by
means of a DAC (COFFSx) in each channel
The dynamic offsets can be compensated by means of
the multiplier ratio
α.
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.
t
T
P
------
t
T
P
------
t
T
P
------
t
T
P
------
t
T
P
------
t
T
P
------
t
T
P
------
t
T
P
------
t
T
P
------
S1
PP
A
LFR
E
OPUREF
–
LF
OFFS
R
OFFSE
++
R
LFR
-----------------------------------------------------------------------------------------
×
=
S2
PP
A
LFR
F
OPUREF
–
LF
OFFS
R
OFFSF
–
+
R
LFR
----------------------------------------------------------------------------------------
×
=
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|---|---|
| TZA1038HW-T | 功能描述:音頻 DSP DVDALASLITE AUTO RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
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| TZA1045 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Photodiode and amplifier IC for CD and DVD applications |
| TZA1045TS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Photodiode and amplifier IC for CD and DVD applications |
| TZA1046 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Photodiode and amplifier IC for CD and DVD applications |
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