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參數(shù)資料
| 型號： | PNX8510 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Analog companion chip |
| 中文描述： | 模擬伴隨芯片 |
| 文件頁數(shù)： | 81/92頁 |
| 文件大?。?/td> | 3064K |
| 代理商： | PNX8510 |
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Philips Semiconductors
PNX8510/11
Analog companion chip
Product data
Rev. 04 – 12 January 2004
81 of 92
9397 750 12612
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
The reference resistor is dimensioned to be 18 k
. Since the reference voltage Vref
is nominally half the supply voltage, the I/V conversion resistor must be dimensioned
by:
Rconv = Vout(rms)/Vref
√
2
/
(12
α
)
Rref
For an rms output voltage of 1000 mV rms, a reference voltage of 1.65 V, a reference
resistance of 18 k
and a maximum digital input level of 0.521 (-5.67 dB), the I/V
conversion resistor should be 2470
.
10.2 DAC reconstruction filter
Figure 33
shows the circuitry for the reconstruction filter of the video D/A converters.
10.3
Video DACs of primary and secondary video channels
The video DACs used in both the primary and secondary video channels employ
segmented current mode architecture. The programming feature of DACs is valid for
both the primary and secondary video channels.
The primary video channel has in its path four DACs: R, G, B and CVBS. The
programming option “Fine Adjust” – via the common four bits of I
2
C [3:0] – can
simultaneously adjust the central output level of all four DACs in a range of ± 7% in
1% increments. Please note the four bits are signed values.
Table 45
shows the
programming values.
Fig 33.
DAC reconstruction filter
MDB661
RV5
75
CV3
390 pF
L3
2.7
μ
H
C40
120 pF
CV4
560 pF
CVBS2
RCA jack
RV6
75
CV5
390 pF
L5
2.7
μ
H
L6
2.7
μ
H
L4
J6
2.7
μ
H
L8
2.7
μ
H
C41
120 pF
CV6
560 pF
LUMA1
RV7
75
CV7
390 pF
L7
2.7
μ
H
C42
120 pF
CV8
560 pF
VOUT6
CHROMA1_OUT
LUMA1_OUT
4
2
7
6
5
3
1
J7
S-video
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PNX8510HW/B1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Analog companion chip |
| PNX8511 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Analog companion chip |
| PNX8511HW/B1 | 功能描述:視頻 IC ANALOG BACKEND COMPANION RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| PNX8511HW/B1,557 | 功能描述:視頻 IC ANALOG BACKEND RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| PNX8526 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Programmable source decoder with integrated peripherals |
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