CWB308CY Просмотр технического описания (PDF) - Calogic, LLC

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Компоненты Описание

производитель

CWB308CY

CMOS/DMOS Quad Monolithic SPST Wide Band Analog Switches

Calogic, LLC 

CWB308 / CWB309

CORPORATION

DISTORTION -VS- FREQUENCY

V+

C

HP

GENERATOR

(or equivalent)

HP

SPECTRUM

ANALYSER

(or equivalent)

D

50

Ω

LOGIC 1 = +5V

S

50

Ω

C

HARMONIC DISTORTION

C = 0.22µ F // 10 µ F

V-

10MHz - 40MHz

TOTAL HARMONIC DISTORTION

-VS-

FREQUENCY

0.80

V-, V+ = +_10V Vanalog = 1.0Vrms

0.50 V-, V+ = +_15V Vanalog = 1.0Vrms

V-, V+ = +_15V Vanalog = 0.3Vrms

0.20

0.10

TA = +25 oC

0.05

10

20

40

f - Frequency (MHz)

10.0

5.0

2.0

1.0

0.3

0.1

0.05

0.02

DISTORTION

-VS-

ANALOG INPUT VOLTAGE

V- = -15V, V+ = +15V

f = 10KHz, RL = 50 Ω TA = +25oC

Total Harmonic

Compensated

0.3

1.0

Vanalog - Analog Input (Vrms)

3.0 5.0

POWER SUPPLY REJECTION RATIO POWER SUPPLY DECOUPLING CIRCUIT

.22 µF

V+

1K Ω

IN

IL

LT

S

D

.22 µF

1K Ω

V-

POWER SUPPLY REJECTION RATIO

-VS-

FREQUENCY

90

-PSRR, +PSRR with Decoupling

80

70

-PSRR

60

V- = 15V, V+ = +15V

w/o Decoupling

50

VMOD= 4.0V -f-p

+PSRR

40

CWB309CP TA = +25 oC

30

0.1

0.2

0.5 1.0

2.0

5.0 10.0 20

f - Frequency (MHz)

By inserting 1K ohm resistors in series with V+ and V-

power supply lines and decoupling both pins at the device

socket, it is possible to improve power supply rejection

ratios of a video switch by 50dB at frequencies of 20MHz

and higher.

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