E749BPJ 查看數據表（PDF） - Semtech Corporation

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E749BPJ

Octal Pin Electronics Driver/Receiver

Semtech Corporation 

TEST AND MEASUREMENT PRODUCTS

Application Information (continued)

VHIGH A

VHIGH B

DVR EN*A

DVR DATA

DVR EN*B

VLOW B

VLOW A

CHANNEL 1

DUT0

DVR EN*A

DVR DATA

DVR EN*B

CHANNEL n

Figure 11. Family A/B Using Two Drivers Per Pin

Edge749

DUT0

Driver Output Impedance

Ideally, a driver would have a constant

output impedance over all ouptut

conditions. However, the Edge749

ouptut impedance does vary slightly

over the common mode drive level and

whether it is driving high or low. Figure

12 shows the variation in Rout.

High Impedance Leakage

The Edge749 is designed to be

extremely low leakage (see Figure 13.)

In a low performance application, where

the output capacitance is not a concern,

the low leakage may allow the

elimination of an isolation relay.

Revision 3 / October 21, 2002

Edge749 Ron vs. Vout - VCC=+16.5V, VEE=-1.5V

9.5

9

8.5

8

7.5

7

6.5

6

Vout [V]

Figure 12. ROUT vs. DOUT

R_VLO

R_VHI

Edge749 Leakage in HIZ - VCC=+16.5V, VEE=-1.5V

10

8

6

4

2

0

-2

-4

-6

-8

-10

Dout [Volts]

VLO=0, VHI=+8

Figure 13. High Impedance Leakage

9

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