ADG786 datasheet(10/12 Pages) AD

10 / 12 page

REV. 0

ADG786/ADG788

–10–

* IN1–4 for ADG734

GND

VDD

ADG786/

ADG788

VOUT

1nF

VDD

VSS

VIN

EN*

VOUT

LOGIC

INPUT (VIN)

QINJ = CL

VOUT

Test Circuit 7. Charge Injection

VOUT

NETWORK

ANALYZER

GND

VIN

OFF ISOLATION = 20 LOG

VOUT

VDD

0.1 F

VDD

VSS

0.1 F

VSS

Test Circuit 8. OFF Isolation

CHANNEL-TO-CHANNEL

CROSSTALK = 20 LOG

GND

VDD

0.1 F

VDD

VSS

0.1 F

VSS

VOUT

NETWORK

ANALYZER

VOUT

Test Circuit 9. Channel-to-Channel Crosstalk

Power Supply Sequencing

When using CMOS devices, care must be taken to ensure cor-

rect power supply sequencing. Incorrect sequencing can result

in the device being subjected to stresses beyond those maximum

ratings listed in the data sheet. Digital and analog inputs should

be applied to the device after supplies and ground. In dual sup-

ply applications, if digital and analog inputs may be applied

prior to VDD and VSS supplies, the addition of a Schottky diode

connected between VSS and GND will ensure that the device

powers on correctly. For single supply applications, VSS should

be tied to GND as close to the device as possible.

VOUT

NETWORK

ANALYZER

GND

VIN

INSERTION LOSS = 20 LOG

VOUT WITH SWITCH

VOUT WITHOUT SWITCH

VDD

0.1 F

VDD

VSS

0.1 F

VSS

Test Circuit 10. Bandwidth

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