DG421AK datasheet(7/12 Pages) MAXIM

Part #	DG421AK

Description	Improved Low-Power, CMOS Analog Switches with Latches

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Manufacturer	MAXIM [Maxim Integrated Products]

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7 / 12 page

Improved Low-Power,

CMOS Analog Switches with Latches

_______________________________________________________________________________________

7

0FF

0N

0FF

VOUT

IN

Q =

∆VOUT x CL

IN DEPENDENT ON SWITCH CONFIGURATION.

INPUT POLARITY DETERMINED BY SENSE OF SWITCH.

∆VOUT

DG421

DG423

DG425

Rg

-15V

V-

VOUT

V+

+15V

+5V

Vg

GND

VIN = 3V

WR

D

CL

10nF

RS VL

S

IN

Figure 5. Charge Injection

_________________________________Timing Diagrams/Test Circuits (continued)

D

-15V

V-

RL2

300

Ω

VOUT1

V+

+15V

+5V

VL

GND

VD = 10V

LOGIC

INPUT

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

CL2

35pF

S

LOGIC

INPUT

SWITCH

OUTPUT 1

SWITCH

OUTPUT 2

0.9 x VOUT

VOUT1

0.9 x VOUT

tD

50%

3V

0V

VOUT2

tD

D

RL = 1000Ω

CL = 35pF

S

RL1

300

Ω

CL1

35pF

RS

VOUT2

DG423

IN

WR

Figure 4. DG423 Break-Before-Make Interval

-15V

V-

RL

GND

WR

SIGNAL GENERATOR

+15V

V+

10nF

RS

+5V

VL

10nF

D

S

0V or 2.4V

IN

DG421

DG423

DG425

VS

VD

NETWORK

ANALYZER

Figure 6 . Off-Isolation Rejection Ratio

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DG421AK Datasheet(PDF) 7 Page - Maxim Integrated Products

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