ADG3242BRJ-REEL datasheet(9/12 Pages) AD

tên linh kiện	ADG3242BRJ-REEL

Giải thích chi tiết về linh kiện	2.5 V/3.3 V, 2-Bit, Common Control Level Translator Bus Switch

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REV. 0

ADG3242

–9–

BUS SWITCH APPLICATIONS

Mixed Voltage Operation, Level Translation

Bus switches can provide an ideal solution for interfacing

between mixed voltage systems. The ADG3242 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

microprocessor. The microprocessor may not have 3.3 V toler-

ant inputs, therefore placing the ADG3242 between the two

devices allows the devices to communicate easily. The bus

switch directly connects the two blocks, therefore introducing

minimal propagation delay, timing skew, or noise.

3.3V ADC

2.5V

3.3V

2.5V

MICROPROCESSOR

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 VCC is 3.3 V (SEL = 3.3 V) and the input signal range is

0 V to VCC, the maximum output signal will be clamped to

within a voltage threshold below the VCC supply. In this case,

the output will be limited to 2.5 V, as shown in Figure 6. This

device can be used for translation from 2.5 V to 3.3 V devices

and also between two 3.3 V devices.

ADG3242

2.5V

3.3V

2.5V

3.3V

Figure 5. 3.3 V to 2.5 V Voltage Translation,

SEL = V

CC

VIN

2.5V

VOUT

0V

3.3V

SWITCH

INPUT

3.3V SUPPLY

SEL = 3.3V

Figure 6. 3.3 V to 2.5 V Voltage Translation,

SEL = V

CC

2.5 V to 1.8 V Translation

When VCC is 2.5 V (SEL = 2.5 V) and the input signal range is

0 V to VCC, the maximum output signal will, as before, be clamped

to within a voltage threshold below the VCC supply. In this case,

the output will be limited to approximately 1.8 V, as shown

in Figure 8.

ADG3242

1.8V

2.5V

Figure 7. 2.5 V to 1.8 V Voltage Translation,

SEL = 2.5 V

CC

VIN

1.8V

VOUT

0V

2.5V

SWITCH

INPUT

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 ADG3242 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. The SEL pin is an active low control pin. SEL acti-

vates internal circuitry in the ADG3242 that allows voltage

translation between 3.3 V devices and 1.8 V devices.

When VCC is 3.3 V and the input signal range is 0 V to VCC, 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.

ADG3242

1.8V

3.3V

Figure 9. 3.3 V to 1.8 V Voltage Translation,

SEL = 0 V

VIN

1.8V

VOUT

0V

3.3V

SWITCH

INPUT

3.3V SUPPLY

SEL = 0V

Figure 10. 3.3 V to 1.8 V Voltage Translation,

SEL = 0 V

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nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Analog Devices	ADG3242BRJ-REEL	399Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch REV. A
	ADG3242BRJ-REEL	680Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch Rev. A
	ADG3242BRJ-REEL7	399Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch REV. A
	ADG3242BRJ-REEL7	680Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch Rev. A

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Mô tả tương tự - ADG3242BRJ-REEL

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Analog Devices	ADG3242	680Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch REV. A
	ADG3242	399Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch REV. A
	ADG3242	680Kb / 16P	2.5 V/3.3 V, 2-Bit Common Control Level Translator Bus Switch Rev. A
	ADG3243	187Kb / 12P	2.5 V/3.3 V, 2-Bit, Individual Control Level Translator Bus Switch REV. 0
	ADG3243	216Kb / 12P	2.5 V/3.3 V, 2-Bit, Individual Control Level Translator Bus Switch REV. 0
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	ADG3241	313Kb / 16P	2.5 V/3.3 V, 1-Bit, 2-Port Level Translator Bus Switch in SOT-66 Rev. B
	ADG3241	313Kb / 16P	2.5 V/3.3 V, 1-Bit, 2-Port Level Translator Bus Switch in SOT-66 REV. B
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	ADG3245BRU	324Kb / 12P	2.5 V/3.3 V, 8-Bit, 2-Port Level Translating, Bus Switch REV. B

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