LT1194C 查看數據表（PDF） - Linear Technology

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LT1194C

Video Difference Amplifier

Linear Technology 

LT1194

APPLICATIO S I FOR ATIO

Murphy Circuits

There are several precautions the user should take when

using the LT1194 in order to realize its full capability.

Although the LT1194 can drive a 50pF capacitive load,

isolating the capacitance with 10Ω can be helpful. Precau-

tions primarily have to do with driving large capacitive

loads.

Other precautions include:

1. Use a ground plane (see Design Note 50, High Fre-

quency Amplifier Evaluation Board).

2. Do not use high source impedances. The input capaci-

tance of 2pF, and RS = 10k, for instance, will give an

8MHz – 3dB bandwidth.

3. PC board socket may reduce stability.

Driving Capacitive Load

Driving Capacitive Load

LT1194 IN DEMO BOARD, CL = 50pF

LT1194 • TA12

LT1194 IN DEMO BOARD, CL = 50pF

WITH 10Ω ISOLATING RESISTOR

LT1194 • TA13

5V

3

+7

5

LT1194

2– 4

8

1 –5V

6 COAX

An Unterminated Cable is

a Large Capacitive Load

5V

3

+7

5

LT1194

2– 4

8

1 –5V

6

1X SCOPE

PROBE

LT1194 • TA14

A 1X Scope Probe is a

Large Capacitive Load

10

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