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參數(shù)資料
| 型號： | TZA1038HW,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 32/45頁 |
| 文件大小： | 0K |
| 描述： | IC DVD SIGNAL PROC 48-HTQFP |
| 標準包裝： | 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
38
Philips Semiconductors
Product specication
High speed advanced analog DVD signal
processor and laser supply
TZA1038HW
11 APPLICATION INFORMATION
11.1
Signal relationships
Simplified relationships between signals are described in
this section. In the simplification, all built-in options for
DVD-ROM are omitted. The variables A1 to A3, ALFC and
ALFR, are the linear equivalents of bits G1 to G3,GLFC and
GLFR.
11.1.1
DATA PATH
Pins RFP and RFN carry the RF data signals in opposite
phases with respect to each other. This allows an ADC
with a balanced or differential input to be used in the
decoder. Depending on the DC input ranges of the ADC,
in many cases the connection between TZA1038HW and
the decoder can be a DC pin to pin connection. The
common mode DC level of pins RFP and RFN can be
chosen independently by means of input pin RFREF.
If bit RFSUM = 0
VRFP =VRFREF + 0.5 × A3 × A2 × A1 × (VI VRFOFFS)
VRFN =VRFREF 0.5 × A3 × A2 × A1 × (VI VRFOFFS)
VRFDIF =A3 × A2 × A1 × (VI VRFOFFS).
If bit RFSUM = 1
VRFP =VRFREF +0.5 × ARFSUM × A3 × (VRFSUMP VRFSU
MN VRFOFFSS)
VRFN =VRFREF 0.5 × ARFSUM × A3 × (VRFSUMP VRFSU
MN VRFOFFSS)
VRFDIF =ARFSUM × A3 (VRFSUMP VRFSUMN VRFOFFSS).
Where:
A1,A2,A3 and ARFSUM are programmed gain values
VI = average input voltage at pins A to D, with respect to
the voltage at pin OPUREF
VRFOFFS is the programmed RFOFFS DAC voltage
(register 4 and register 5)
VRFREF is the input voltage at pin RFREF.
Correct settings for VRFREF and VRFOFFS are required to
keep both VRFP and VRFN at the DC voltage levels
specified for the TZA1038HW and the decoder.
11.1.2
SERVO PATH
The current through output pins OA to OD represents the
low-pass filtered input voltage of each individual pick-up
segment. The gain from input to output can be
programmed to adapt to different disc types or pick-ups
(offset cancellation is omitted for simplicity):
(in DVD push-pull mode)
or:
(in CD three-beam push-pull mode)
or:
(in DPD mode)
Where:
A
LFC and ALFR are the programmable gains in central
and radial paths
Gain should be programmed such that maximum signal
levels fit into the range of the servo processor ADC
VI(A); VI(B); VI(C) and VI(D) are defined as input voltages
at pins A to D with respect to pin OPUREF
IDC is a DC current that keeps IS1 and IS2 unipolar
IFS is the sensitivity to relative phase difference.
Phase difference =
;
180° < φ < + 180°.
I
Ox
V
Ix
A
LFC
×
14 k
---------------------------
=
I
S1
V
I(A)
V
I(B)
+
() A
LFR
×
30 k
-----------------------------------------------------
=
I
S2
V
I(C)
V
I(D)
+
() A
LFR
×
30 k
-----------------------------------------------------
=
I
S1
V
I(E)
A
LFR
×
15 k
------------------------------
=
I
S2
V
I(F)
A
LFR
×
15 k
------------------------------
=
I
S1
I
DC
I
FS
phase difference
×
+
=
I
S2
I
DC
I
FS
–
phase difference
×
=
t
T
p
------
φ degrees
[]
360
----------------------------------
=
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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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