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參數(shù)資料
| 型號(hào)： | ADG3247BRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 通用總線功能 |
| 英文描述： | 2.5 V/3.3 V, 16-Bit, 2-Port Level Translating, Bus Switch |
| 中文描述： | DUAL 8-BIT DRIVER, TRUE OUTPUT, PDSO38 |
| 封裝： | MS-153BD-1, TSSOP-38 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大小： | 204K |
| 代理商： | ADG3247BRU |
PRELIMINARY TECHNICAL DATA
REV. PrD
ADG3247
–9–
BUS SWITCH APPLICATIONS
Mixed Voltage Operation, Level Translation
Bus switches can be used to provide an ideal solution for inter-
facing between mixed voltage systems. The ADG3247 is suitable
for applications where voltage translation from 3.3 V technology to
a lower voltage technology is needed. This device can translate
from 3.3 V to 1.8 V, from 2.5 V to 1.8 V, or bidirectionally from
3.3 V directly to 2.5 V.
Figure 4 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 micro-
processor. The microprocessor may not have 3.3 V tolerant inputs;
therefore placing the ADG3247 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 4. 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 (
SEL
= V
CC
) 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.
ADG3247
2.5V
2.5V
3.3V
2.5V
3.3V
Figure 5. 3.3 V to 2.5 V Voltage Translation,
SEL
= V
CC
In this case, the output will be limited to 2.5 V, as shown in
Figure 6.
V
IN
2.5V
V
OUT
0V
3.3V
SWITCH
INPUT
S
O
3.3V SUPPLY
SEL
= 3.3V
Figure 6. 3.3 V to 2.5 V Voltage Translation,
SEL
= V
CC
This device can be used for translation from 2.5 V to 3.3 V
devices, and also between two 3.3 V devices.
2.5 V to 1.8 V Translation
When V
CC
is 2.5 V (
SEL
= V
CC
) 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.
ADG3247
1.8V
2.5V
2.5V
Figure 7. 2.5 V to 1.8 V Voltage Translation,
SEL
= V
CC
In this case, the output will be limited to approximately 1.8 V,
as shown in Figure 7.
V
IN
1.8V
V
OUT
0V
2.5V
SWITCH
INPUT
S
O
2.5V SUPPLY
SEL
= 2.5V
Figure 8. 2.5 V to 1.8 V Voltage Translation,
SEL
= V
CC
3.3 V to 1.8 V Translation
The ADG3247 offers the option of interfacing between a 3.3 V
device and a 1.8 V device. This is possible through use of the
SEL
pin.
SEL
pin: An active low control pin.
SEL
activates internal
circuitry in the ADG3247 that allows voltage translation between
3.3 V devices and 1.8 V devices.
ADG3247
1.8V
3.3V
3.3V
Figure 9. 3.3 V to 1.8 V Voltage Translation,
SEL
= 0 V
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 1.8 V, as shown in
Figure 9. To do this, the
SEL
pin must be tied to Logic 0. If
SEL
is unused, it should be tied directly to V
CC
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADG3247 | 2.5 V/3.3 V, 16-Bit, 2-Port Level Translating, Bus Switch |
| ADG3248 | 2.5 V/ 3.3 V, 2 :1 Multiplexer/ Demultiplexer Bus Switch |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADG3247BRU-REEL7 | 功能描述:IC SW BUS 2.5/3.3V 16BIT 38TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> 邏輯 - 信號(hào)開(kāi)關(guān)，多路復(fù)用器，解碼器 系列:- 標(biāo)準(zhǔn)包裝:48 系列:74VHC 類(lèi)型:多路復(fù)用器 電路:4 x 2:1 獨(dú)立電路:1 輸出電流高，低:8mA，8mA 電壓電源:單電源 電源電壓:2 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:管件 |
| ADG3247BRUZ | 功能描述:IC SW BUS 2.5/3.3V 16BIT 38TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 邏輯 - 信號(hào)開(kāi)關(guān)，多路復(fù)用器，解碼器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:74LVC 類(lèi)型:解碼器/多路分解器 電路:1 x 2:4 獨(dú)立電路:2 輸出電流高，低:24mA，24mA 電壓電源:單電源 電源電壓:1.65 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SO 包裝:Digi-Reel® 其它名稱(chēng):296-28947-6 |
| ADG3247BRUZ-REEL | 制造商:Analog Devices 功能描述:- Tape and Reel |
| ADG3248 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:2.5 V/ 3.3 V, 2 :1 Multiplexer/ Demultiplexer Bus Switch |
| ADG3248BKS-R2 | 功能描述:IC MUX/DEMUX 2X1 SC70-6 RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 模擬開(kāi)關(guān)，多路復(fù)用器，多路分解器 系列:- 標(biāo)準(zhǔn)包裝:48 系列:- 功能:開(kāi)關(guān) 電路:4 x SPST - NO 導(dǎo)通狀態(tài)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(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:管件 |
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