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參數(shù)資料
| 型號(hào)： | AD8321 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Gain Programmable CATV Line Driver(可編程增益CATV線驅(qū)動(dòng)器) |
| 中文描述： | 增益可編程有線電視線路驅(qū)動(dòng)器（可編程增益有線電視線驅(qū)動(dòng)器） |
| 文件頁(yè)數(shù)： | 6/9頁(yè) |
| 文件大?。?/td> | 64K |
| 代理商： | AD8321 |
PRELMNARY
DATA
TECHNCAL
T
ES
VALID DAT A W ORD G1
GAIN TRANSFER (G1)
T
DS
T
E H
>= 7 CLO CK
CY CL ES
GAIN TRANSFER (G2)
T
OFF
T
GS
ANALOG
OUTPUT
SIGNAL AMPLITUDE (p-p)
PD
PEDESTAL
C LK
SDATA
DATEN
T
ON
T
C
T
WH
VALID D ATA W ORD G2
Figure 3. Serial Interface Timing
The write cycle to the device is initiated by the falling edge of
DATEN. This is followed by 7 clock pulses that clock the control
word in. Where it is necessary to clock exactly 8 bits (this is the
case with most microcontroller and DSP serial ports) the first bit
clocked should be a Don’t Care, followed by the MSB (i.e. the
LSB is the last bit clocked in). Because the clock signal is level
triggered, data is effectively clocked on the falling edge of CLK.
After the control word has been clocked in, the rising edge of
the
DATEN
updates the gain.
The relationship between gain and control word is given by the
equation
Gain(dB) = -28 + (0.75 x Code)
where code is the decimal equivalent of the gain control word (0
to 71).
The digital interface also contains an asynchronous power
down mode. The normally high
PD
line can be pulled low at
any time.
quiescent current to between 19mA and 20mA (depending upon
the power supply voltage). In this mode, the programmed gain is
maintained.
Power Supply and Decoupling.
noise) single supply of between +5V and +10V. Careful attention
must be paid to decoupling the power supply pins. A 10uF
capacitor, located fairly close to the device, is required to provide
good decoupling for lower frequency signals. In addition, and
more importantly, five 0.1uF decoupling capacitors should be
located close to each of the five power supply pins (7,8,9,17 and
20). A 0.1uF capacitor must also be connected to the pins labeled
BYP and VOCM (pins 14 and 5), to provide decoupling to an
internal node of the device. All six ground pins shouldbe
connected to a low common impedance ground plane.
Rev 7.1 6/26/98 6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8321_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Gain Programmablea CATV Line Driver |
| AD8321AR | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 20-Pin SOIC W Tube 制造商:Rochester Electronics LLC 功能描述:SOIC MCNS CABLE MODEM LINE DRIVER - Bulk |
| AD8321AR-REEL | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 20-Pin SOIC W T/R |
| AD8321ARZ | 功能描述:IC LINE DRIVER CATV 3.3V 20SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| AD8321ARZ2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Gain Programmable CATV Line DRiver |
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