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參數資料
| 型號： | ADG3248 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 2.5 V/ 3.3 V, 2 :1 Multiplexer/ Demultiplexer Bus Switch |
| 中文描述： | 2.5伏/ 3.3伏，2：1多路復用器/解復用器總線開關 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 172K |
| 代理商： | ADG3248 |
REV. 0
ADG3248
–7–
BUS SWITCH APPLICATIONS
Mixed Voltage Operation, Level Translation
Bus switches can provide an ideal solution for interfacing
between mixed voltage systems. The ADG3248 is suitable for
applications where voltage translation from 3.3 V technology to
a lower voltage technology is needed. This device can translate
from 2.5 V to 1.8 V, or bidirectionally from 3.3 V directly
to 2.5 V.
Figure 1 shows a block diagram of a typical application in which
a user needs to interface between a 3.3 V ADC and a 2.5 V
microprocessor. The microprocessor may not have 3.3 V toler-
ant inputs, therefore placing the ADG3248 between the two
devices allows the devices to communicate easily. The bus
switch directly connects the two blocks, thus introducing
minimal propagation delay, timing skew, or noise.
3.3V ADC
2.5V
3.3V
2.5V
MICROPROCESSOR
A
3.3V
Figure 1. Level Translation between a 3.3 V ADC
and a 2.5 V Microprocessor
3.3 V to 2.5 V Translation
When V
CC
is 3.3 V and the input signal range is 0 V to V
CC
, the
maximum output signal will be clamped to within a voltage
threshold below the V
CC
supply.
In this case, the output will be limited to 2.5 V, as shown in
Figure 3. This device can be used for translation from 2.5 V to
3.3 V devices and also between two 3.3 V devices.
ADG3248
2.5V
2.5V
3.3V
2.5V
3.3V
Figure 2. 3.3 V to 2.5 V Voltage Translation
V
IN
2.5V
V
OUT
0V
3.3V
SWITCH
INPUT
S
O
3.3V SUPPLY
Figure 3. 3.3 V to 2.5 V Voltage Translation
2.5 V to 1.8 V Translation
When V
CC
is 2.5 V and the input signal range is 0 V to V
CC
, the
maximum output signal will, as before, be clamped to within a
voltage threshold below the V
CC
supply. In this case, the output
will be limited to approximately 1.8 V, as shown in Figure 5.
ADG3248
1.8V
2.5V
2.5V
Figure 4. 2.5 V to 1.8 V Voltage Translation
V
IN
1.8V
V
OUT
0V
2.5V
SWITCH
INPUT
S
O
2.5V SUPPLY
Figure 5. 2.5 V to 1.8 V Voltage Translation
Analog Switching
Bus switches can be used in many analog switching applications,
for example, video graphics. Bus switches can have lower on
resistance, smaller ON and OFF channel capacitance, and thus
improved frequency performance than their analog counterparts.
The bus switch channel itself, consisting solely of an NMOS
switch, limits the operating voltage (see TPC 1 for a typical
plot), but in many cases, this does not present an issue.
相關PDF資料 |
PDF描述 |
|---|---|
| ADG3248BKS-R2 | 2.5 V/ 3.3 V, 2 :1 Multiplexer/ Demultiplexer Bus Switch |
| ADG3248BKS-REEL | 2.5 V/ 3.3 V, 2 :1 Multiplexer/ Demultiplexer Bus Switch |
| ADG3248BKS-REEL7 | 2.5 V/ 3.3 V, 2 :1 Multiplexer/ Demultiplexer Bus Switch |
| ADG3249 | 2.5 V/3.3 V, 2:1 Multiplexer/ Demultiplexer Bus Switch |
| ADG3249BRJ-R2 | 2.5 V/3.3 V, 2:1 Multiplexer/ Demultiplexer Bus Switch |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADG3248BKS-R2 | 功能描述:IC MUX/DEMUX 2X1 SC70-6 RoHS:否 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 標準包裝:48 系列:- 功能:開關 電路:4 x SPST - NO 導通狀態電阻:100 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC 包裝:管件 |
| ADG3248BKS-REEL | 制造商:Analog Devices 功能描述:Multiplexer/Demultiplexer Bus Switch 1-Element CMOS 2-IN 6-Pin SC-70 T/R |
| ADG3248BKS-REEL7 | 制造商:Analog Devices 功能描述:Multiplexer/Demultiplexer Bus Switch 1-Element CMOS 2-IN 6-Pin SC-70 T/R 制造商:Rochester Electronics LLC 功能描述: |
| ADG3248BKSZ-REEL7 | 功能描述:IC MUX/DEMUX 2X1 SC70-6 RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 特色產品:MicroPak? 標準包裝:1 系列:- 功能:開關 電路:2 x SPST - NC 導通狀態電阻:500 毫歐 電壓電源:單電源 電壓 - 電源，單路/雙路(±):1.4 V ~ 4.3 V 電流 - 電源:150nA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-XFDFN 供應商設備封裝:8-XSON，SOT833-1 （1.95x1） 包裝:Digi-Reel® 其它名稱:568-5557-6 |
| ADG3248BKZ-REEL7 | 制造商:Analog Devices 功能描述:2.5/3.3V, 2:1 MUX/DEMUX, COMMON CTRL IC. - Tape and Reel |
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