- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1893 > AD8159ASVZ (Analog Devices Inc)IC MUX/DEMUX QUAD BUFF 100TQFP PDF資料下載
參數(shù)資料
| 型號： | AD8159ASVZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MUX/DEMUX QUAD BUFF 100TQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | XStream™ |
| 應(yīng)用： | 2:1 多路復(fù)用器/1:2 多路分配器 |
| 接口： | 串行 |
| 電源電壓： | 3 V ~ 3.6 V |
| 封裝/外殼： | 100-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 100-TQFP-EP（14x14） |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
| 產(chǎn)品目錄頁面： | 801 (CN2011-ZH PDF) |
AD8159
Rev. B | Page 19 of 24
INTERFACING TO THE AD8159
TERMINATION STRUCTURES
To determine the best strategy for connecting to the high speed
pins of the AD8159, the user must first be familiar with the on-chip
termination structures. The AD8159 contains multiple types of
that Port C has a slightly modified termination structure to support
the bidirectional feature.
05
61
1-
04
5
55
1173
VCC
VEE
VTTI
IP_xx
IN_xx
Figure 39. Simplified Input Circuit
05
61
1-
0
46
IT
VIP
VIN
VCC
VEE
VTTO
OP_xx
ON_xx
50
Figure 40. Simplified Output Circuit (Port A or Port B)
05
61
1-
04
7
1173
IT
VIP
VIN
VCC
VEE
VTTOI
OP_xx
ON_xx
55
Figure 41. Simplified Output Circuit (Port C)
For input and bidirectional ports, the termination structure
consists of two 55 Ω resistors connected to a termination supply
and an 1173 Ω resistor connected across the differential inputs,
the latter being a result of the finite differential input impedance
of the equalizer.
For output ports, there are two 50 Ω resistors connected to the
termination supply. Note that the differential input resistance
for both structures is the same, 100 Ω.
INPUT COMPLIANCE
The range of allowable input voltages is determined by the
fundamental limitations of the active input circuitry. This range
of signals is normally a function of the common-mode level of
the input signal, the signal swing, and the supply voltage. For a
given input signal swing, there is a range of common-mode
voltages that keeps the high and low voltage excursions within
acceptable limits. Similarly, for a given common-mode input
voltage, there is a maximum acceptable input signal swing.
There is also a minimum signal swing that the active input
circuitry can resolve reliably.
all ports. Note that the input range is different when comparing
bidirectional ports to strictly input ports. This is a consequence
of the additional circuitry required to support the bidirectional
feature on Port C.
AC Coupling
One way to simplify the input circuit and make it compatible
with a wide variety of driving devices is to use ac coupling. This
has the effect of isolating the dc common-mode levels of the driver
and the AD8159 input circuitry. AC coupling requires a capacitor
in series with each single-ended input signal, as shown in Figure 42.
This should be done in a manner that does not interfere with
the high speed signal integrity of the PCB.
05611-
042
50
VTTOD
VCC
55
VTTI/VTTIO
DRIVER
AD8159
55
VEE
1173
CP
CN
IP_xx
IN_xx
Figure 42. AC Coupling Input Signal of the AD8159
When ac coupling is used, the common-mode level at the input
of the device is equal to VTTI. The single-ended input signal
swings above and below VTTI equally. The user can then use
common-mode levels and signal swing levels that satisfy the
input range of the AD8159.
If dc coupling is required, determining the input common-mode
level is less straightforward because the configuration of the
driver must also be considered. In most cases, the user sets VTTI
on the AD8159 to the same level as the driver output termination
voltage, VTTOD. This prevents a continuous dc current from
flowing between the two supplies. As a practical matter, both
devices can be terminated to the same physical supply.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8174ANZ | IC MUX SW W/AMP 250MHZ 14-DIP |
| AD8175ABPZ | IC CROSSPOINT SWITCH TRPL 676BGA |
| AD8176ABPZ | IC VIDEO CROSSPOINT SWIT 676BGA |
| AD8177ABPZ | IC VIDEO CROSSPOINT SWIT 676BGA |
| AD8178ABPZ | IC VIDEO CROSSPOINT SWIT 676BGA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8159-EVAL-AC | 制造商:Analog Devices 功能描述:EVAL KIT FOR AC-COUPLED EVAL BD - Bulk |
| AD8159-EVAL-DC | 制造商:Analog Devices 功能描述:DC-COUPLED EVAL BD - Bulk |
| AD8159XSVZ | 制造商:Analog Devices 功能描述:QUAD-LANE 3.2GBPS 2:1 MUX / 1:2 DEMUX SWITCH 100-PIN TQFP_EP - Trays |
| AD815ARB24 | 制造商:Analog Devices 功能描述: |
| AD815ARB-24 | 制造商:Rochester Electronics LLC 功能描述:SOIC HIGH OUTPUT CURRENT DIFF DRIVER - Bulk 制造商:Analog Devices 功能描述:Operational Amplifier IC Number of Ampli 制造商:Analog Devices Inc. 功能描述:High Output Current Differential Driver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。