ADG708 datasheet(11/12 Pages) AD

11 / 12 page

ADG708/ADG709

–11–

REV. 0

OUTPUT

50%

ENABLE

DRIVE (VIN)

50%

tON (EN)

0.9V0

tOFF (EN)

* SIMILAR CONNECTION FOR ADG709

GND

ADG708*

S2 THRU S8

VIN

35pF

VDD

VSS

VDD

VSS

300

VOUT

Test Circuit 7. Enable Delay, tON (EN), tOFF (EN)

LOGIC INPUT

(VIN)

VOUT

QINJ = CL

VOUT

VDD

GND

ADG708*

1nF

VDD

VIN

VSS

*SIMILAR CONNECTION FOR ADG709

Test Circuit 8. Charge Injection

EN**

GND

VDD

VOUT

VSS

* SIMILAR CONNECTION FOR ADG709

** CONNECT TO 2.4V FOR BANDWIDTH MEASUREMENTS

ADG708*

OFF ISOLATION = 20LOG10

VOUT

VOUT WITH SWITCH

VOUT WITHOUT SWITCH

(

)

INSERTION LOSS = 20LOG10

Test Circuit 9. OFF Isolation and Bandwidth

VOUT

VSS

VDD

GND

ADG708*

VSS

2.4V

* SIMILAR CONNECTION FOR ADG709

CHANNEL-TO-CHANNEL CROSSTALK = 20LOG10

VOUT

Test Circuit 10. Channel-to-Channel Crosstalk

Power-Supply Sequencing

When using CMOS devices, care must be taken to ensure correct

power-supply sequencing. Incorrect power-supply sequencing

can result in the device being subjected to stresses beyond the

maximum ratings listed in the data sheet. Digital and analog

inputs should always be applied after power supplies and ground.

For single supply operation, VSS should be tied to GND as close

to the device as possible.

ADG708 数据表(PDF) 11 Page - Analog Devices

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ADG708 数据表(PDF) 11 Page - Analog Devices

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