LT1193CS8 查看數據表（PDF） - Linear Technology

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LT1193CS8

Video Difference Amplifier

Linear Technology 

APPLICATIO S I FOR ATIO

Closed-Loop Voltage Gain vs Frequency

25

AV = 10

VS = ±5V

TA = 25°C

15 AV = 5

AV = 3

AV = 2

5

LT1193

Small-Signal Transient Response

–5

100k

1M

10M

FREQUENCY (Hz)

100M

LT1193 • TA07

Closed-Loop Voltage Gain vs Frequency

10

VS = ±5V

TA = 25°C

8 AV = 2

RFB = 300Ω

RG = 300Ω

6

4

CFB = 0pF

CFB = 5pF

CFB = 10pF

CFB = 15pF

AV = 2 WITH 8pF FEEDBACK CAPACITOR

RISE TIME = 3.75ns, RFB = 1k, RG = 1k

LT1193 • TA10

Double Terminated Cable Driver

3+

2–

5V

7

1 +LT1193

6

8– 4

–5V

RG

RFB

75Ω CABLE

75Ω

CFB

2

0

100k

1M

10M

FREQUENCY (Hz)

100M

LT1193 • TA08

Small-Signal Transient Response

LT1193 • TA09

AV = 2, OVERSHOOT = 40%, RFB = 1k, RG = 1k

100Ω, while operating on ±5V supplies and gains > 3. On

a single 5V supply, the LT1193 can swing 2.6VP-P for

gains ≥ 2.

Closed-Loop Voltage Gain vs Frequency

8

6

AV = 2

4

RFB = 300Ω

RG = 100Ω

2

CFB = 0pF

0

AV = 1

–2

RFB = 300Ω

RG = 300Ω

CFB = 10pF

–4

–6

100k

1M

10M

100M

FREQUENCY (Hz)

LT1193 • TA11

When driving a cable it is important to terminate the cable

to avoid unwanted reflections. This can be done in one of

two ways: single termination or double termination. With

single termination, the cable must be terminated at the

receiving end (75Ω to ground) to absorb unwanted en-

ergy. The best performance can be obtained by double

termination (75Ω in series with the output of the amplifier,

and 75Ω to ground at the other end of the cable). This

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