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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321

PS396

精密， 16通道， 17V模拟多路复用器

测试电路和时序图（续）

+5V

V+

NO1-NO16

+3V

逻辑

输入

+3V

50%

t

<为20ns

t

F <为20ns

+2.4V

EN

A0

A1

A2

A3

0V

V

OUT

80%

COM

V–

300

–5V

V

OUT

35pF

开关

产量

0V

t

开放

50

GND

图4.先开后合做区间

+5V

V+

NO1-NO16

VS

通道

SELECT

EN

A0

A1

A2

A3

GND

COM

V

OUT

C

L

= 100pF的

V–

–5V

V

CTE = CL

V

OUT

V

OUT是由于电荷转移所测量的电压

错误Q当通道关闭。

=

V

OUT

+3V

逻辑

输入

0V

关闭

ON

关闭

V

OUT

图5.电荷注入（V

CTE

)

+5V

VIN

RS = 50Ω

V+

NO1

NO16

A0

A1

A2

A3

GND EN

COM

V

OUT

R

L

= 1k

V–

10nF

R = 1kΩ的

V

OUT

VIN

NO1

NO2

NO16

A0

A1

A2

A3

+5V

V+

10nF

COM

R

L

= 1k

GND EN

V–

–5V

–5V

串扰= 20log

关断隔离= 20log

V

OUT

V

IN

V

OUT

V

IN

图6.关断隔离（V

ISO

)

图7.相声（V

CT

)

8

PS8443C

01/14/02