ADG3257BRQZ datasheet(9/12 Pages) AD

Part #	ADG3257BRQZ

Description	High Speed, 3.3 V/5 V Quad 2:1 Mux/Demux (4-Bit, 1 of 2) Bus Switch

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Manufacturer	AD [Analog Devices]

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ADG3257

Rev. E | Page 9 of 12

TEST CIRCUITS

S1

DUT

GND

OPEN

PULSE

GENERATOR1

VIN

RT3

VCC

VOUT

CL2

RL

2 × VCC

1PULSE GENERATOR FOR ALL PULSES:

tF < 2.5ns, tR < 2.5ns.

2CL = INCLUDES BOARD, STRAY, AND LOAD CAPACITANCES.

3RT ISTHETERMINATION RESISTOR; SHOULD BE EQUALTO ZOUT OF THE

PULSE GENERATOR.

Figure 12. Load Circuit

0V

VIH

VT

tPHL

tPLH

SWITCH INPUT

VOH

VT

VOL

OUTPUT

Figure 13. Propagation Delay

ENABLE

DISABLE

0V

S1 @ 2VCC

VT

VOH – ΔV

S1 @ 2VCC

LOW

tPZL

tPZH

CONTROL INPUTS

tPHZ

tPLZ

VT

VCC

VIH

VT

VCC

VOL + ΔV

VOL

VOH

OUTPUT

Figure 14. Select, Enable, and Disable Times

Table 6. Switch S1 Condition

Test

S1

tPLH, tPHL

Open

tPLZ, tPZL

2 × VCC

tPHZ, tPZH

GND

tSEL

Open

Table 7. Test Conditions

Symbol

VCC = 5 V ± 10%

VCC = 3.3 V ± 10%

Unit

RL

500

Ω

ΔV

300

mV

CL

50

pF

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ADG3257BRQZ Datasheet(PDF) 9 Page - Analog Devices

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