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參數資料
| 型號： | AD9984AKCPZ-170 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 其它接口 |
| 英文描述： | High Performance 10-Bit Display Interface |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, QCC64 |
| 封裝： | 9 X 9 MM, ROHS COMPLIANT, MO-220VMMD-4, LFCSP-64 |
| 文件頁數： | 19/44頁 |
| 文件大?。?/td> | 490K |
| 代理商： | AD9984AKCPZ-170 |
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AD9984A
POWER MANAGEMENT
To meet display requirements for low standby power, the
AD9984A includes a power-down mode. The power-down state
can be controlled manually (via Pin 17 or Register 0x1E, Bit 3),
or automatically by the chip. If automatic control is selected
(Register 0x1E, Bit 4 =1), the AD9984A’s decision is based on
the status of the following sync detect bits in Register 0x24: Bit 2,
Bit 3, Bit 6, and Bit 7. If either an Hsync or a sync-on-green input
is detected on any input, the chip powers up; otherwise, it powers
down. For manual control, the AD9984A allows flexibility of
control through both a dedicated pin and a register bit. For the
dedicated pin, a hardware watchdog circuit controls power-down,
while software controls power-down for the register bit. With
manual power-down control, the polarity of the power-down
pin must be set (Register 0x1E, Bit 2) whether the pin is used or
not. If unused, it is recommended to set the polarity to active
high and hardwire the pin to ground with a 10 kΩ resistor.
Rev. 0 | Page 19 of 44
In power-down mode, several circuits continue to operate
normally. The serial register and sync detect circuits maintain
power so that the AD9984A can be woken up from its power-
down state. The band gap circuit maintains power because it is
needed for sync detection. The sync-on-green and SOGOUT
functions continue to operate because SOGOUT is needed
when sync detection is performed by a secondary chip. All of
these circuits require minimal power to operate. Typical
standby power on the AD9984A is about 50 mW.
There are two options that can be selected when in power-
down. These are controlled by Bit 0 and Bit 1 in Register 0x1E.
Bit 0 controls whether the SOGOUT pin is in high impedance
or not. In most cases, the user does not place SOGOUT in high
impedance during normal operation. The option to put SOGOUT
in high impedance is included mainly to allow for factory testing
modes. Bit 1 keeps the AD9984A powered up while placing
only the outputs in high impedance. This option is useful when
the data outputs from two chips are connected on a PCB and
the user wants to switch instantaneously between the two.
Table 11.Power-Down Control and Mode Descriptions
Inputs
Power-Down
2
X
X
Powered on/Comments
Everything.
Only the serial bus, sync activity detect,
SOG, band gap reference.
Everything.
Only the serial bus, sync activity detect,
SOG, band gap reference.
Mode
Power-Up
Power-Down
Auto Power-Down Control
1
1
1
Sync Detect
3
1
0
Power-Up
Power-Down
0
0
0
1
X
X
1
Auto power-down control is set by Register 0x1E, Bit 4.
2
Power-down is controlled by OR’ing Pin 17 with Register 0x1E, Bit 3. The polarity of Pin 17 is set by Register 0x1E, Bit 2.
3
Sync detect is determined by OR’ing Register 0x24, Bit 2, Bit 3, Bit 6, and Bit 7.
TIMING DIAGRAMS
The timing diagrams in Figure 14 to Figure 17 show the operation of the AD9984A. The output data clock signal is created so that its
rising edge always occurs between data transitions and can be used to latch the output data externally. There is a pipeline in the AD9984A
that must be flushed before valid data becomes available. This means six data sets are present before valid data is available.
t
PER
t
DCYCLE
t
SKEW
DATACK
DATA
HSOUT
0
Figure 14. Output Timing
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相關代理商/技術參數 |
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| AD9984AKSTZ-140 | 功能描述:IC DISPLAY 10BIT 140MSPS 80LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| AD9984AKSTZ-170 | 功能描述:IC DISPLAY 10BIT 170MSPS 80LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| AD9984APCBZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Performance 10-Bit Display Interface |
| AD9984KSTZ-110 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD9984KSTZ-140 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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