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| 型號： | ADV7343BSTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 79/108頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ENCODER VIDEO W/DAC 64-LQFP |
| 產(chǎn)品變化通告： | ADV734x, ADV739x Feature Improvement |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 視頻編碼器 |
| 應(yīng)用： | DVD，Blu-Ray |
| 電壓 - 電源，模擬： | 3.3V |
| 電壓 - 電源，數(shù)字： | 1.8V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-LQFP |
| 供應(yīng)商設(shè)備封裝： | 64-LQFP（10x10） |
| 包裝： | 托盤 |
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ADV7342/ADV7343
Data Sheet
Rev. | Page 72 of 108
PRINTED CIRCUIT BOARD LAYOUT AND DESIGN
UNUSED PINS
If the S_HSYNC, S_VSYNC, P_HSYNC, and P_VSYNC pins are
not used, they should be tied to VDD_IO through a pull-up resistor
(10 kΩ or 4.7 kΩ). Any other unused digital inputs should be tied
to ground. Unused digital output pins should be left floating. DAC
outputs can be either left floating or connected to GND. Disabling
these outputs is recommended.
DAC CONFIGURATIONS
The ADV7342/ADV7343 contain six DACs. All six DACs can
be configured to operate in low-drive mode. Low-drive mode is
defined as 4.33 mA full-scale current into a 300 load, RL.
DAC 1, DAC 2, and DAC 3 can also be configured to operate in
full-drive mode. Full-drive mode is defined as 34.7 mA full-
scale current into a 37.5 load, RL. Full-drive is the recommended
mode of operation for DAC 1, DAC 2, and DAC 3.
The ADV7342/ADV7343 contain two RSET pins. A resistor
connected between the RSET1 pin and AGND is used to control
the full-scale output current and, therefore, the DAC output
voltage levels of DAC 1, DAC 2, and DAC 3. For low-drive
operation, RSET1 must have a value of 4.12 k, and RL must have a
value of 300 . For full-drive operation, RSET1 must have a value
of 510 , and RL must have a value of 37.5 .
A resistor connected between the RSET2 pin and AGND is used
to control the full-scale output current and, therefore, the DAC
output voltage levels of DAC 4, DAC 5, and DAC 6. RSET2 must
have a value of 4.12 k, and RL must have a value of 300 (that
is, low-drive operation only).
The resistors connected to the RSET1 and RSET2 pins should have a
1% tolerance.
The ADV7342/ADV7343 contain two compensation pins,
COMP1 and COMP2. A 2.2 nF compensation capacitor should
be connected from each of these pins to VAA.
VOLTAGE REFERENCE
The ADV7342/ADV7343 contain an on-chip voltage reference
that can be used as a board-level voltage reference via the VREF
pin. Alternatively, the ADV7342/ADV7343 can be used with an
external voltage reference by connecting the reference source to
the VREF pin. For optimal performance, use an external voltage
reference such as the AD1580 with the ADV7342/ ADV7343. If an
external voltage reference is not used, a 0.1 F capacitor should
be connected from the VREF pin to VAA.
VIDEO OUTPUT BUFFER AND OPTIONAL
OUTPUT FILTER
An output buffer is necessary on any DAC that operates in low-
drive mode (RSETx = 4.12 k, RL = 300 ). Analog Devices
produces a range of op amps suitable for this application, for
example, the AD8061. For more information about line driver
buffering circuits, see the relevant op amp data sheet.
An optional reconstruction (anti-imaging) low-pass filter (LPF)
may be required on the ADV7342/ADV7343 DAC outputs if
the ADV7342/ADV7343 are connected to a device that requires
this filtering.
The filter specifications vary with the application. The use of
16× (SD), 8× (ED), or 4× (HD) oversampling can remove the
requirement for a reconstruction filter altogether.
For applications requiring an output buffer and reconstruction
video filter buffers should be considered.
Table 58. ADV7342/ADV7343 Output Rates
Input Mode
(Subaddress 0x01,
Bits[6:4])
PLL Control
(Subaddress
0x00, Bit 1)
Output Rate (MHz)
SD Only
Off
27
(2x)
On
216
(16x)
ED Only
Off
27
(1x)
On
216
(8x)
HD Only
Off
74.25
(1x)
On
297
(4x)
Table 59. Output Filter Requirements
Application
Oversampling
Cutoff
Frequency
(MHz)
Attenuation
–50 dB at
(MHz)
SD
2×
>6.5
20.5
SD
16×
>6.5
209.5
ED
1×
>12.5
14.5
ED
8×
>12.5
203.5
HD
1×
>30
44.25
HD
4×
>30
267
560
600
22pF
600
DAC
OUTPUT
75
BNC
OUTPUT
10H
560
3
4
1
06399-
085
Figure 83. Example of Output Filter for SD, 16× Oversampling
560
6.8pF
600
6.8pF
600
DAC
OUTPUT
75
BNC
OUTPUT
4.7H
560
3
4
1
06399-
086
Figure 84. Example of Output Filter for ED, 8× Oversampling
D
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| ADV7343WBSTZ | 功能描述:IC ENCODER VID 12BIT DAC 64LQFP 制造商:analog devices inc. 系列:- 包裝:托盤 零件狀態(tài):在售 類型:視頻編碼器 應(yīng)用:DVD，Blu-Ray 電壓 - 電源，模擬:2.6 V ~ 3.46 V 電壓 - 電源，數(shù)字:1.71 V ~ 1.89 V 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商器件封裝:64-LQFP（10x10） 標(biāo)準(zhǔn)包裝:1 |
| ADV7343WBSTZ-RL | 功能描述:Video Encoder IC DVD, Blu-Ray 64-LQFP (10x10) 制造商:analog devices inc. 系列:- 包裝:帶卷（TR） 零件狀態(tài):有效 類型:視頻編碼器 應(yīng)用:DVD，Blu-Ray 電壓 - 電源，模擬:2.6 V ~ 3.46 V 電壓 - 電源，數(shù)字:1.71 V ~ 1.89 V 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商器件封裝:64-LQFP（10x10） 標(biāo)準(zhǔn)包裝:1,500 |
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| ADV7344BSTZ | 制造商:Analog Devices 功能描述: |
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