HFA1135 查看數據表（PDF） - Renesas Electronics

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HFA1135

360MHz, Low Power, Video Operational Amplifier with Output Limiting

Renesas Electronics 

HFA1135

Electrical Specifications VSUPPLY =5V, AV = +1, RF = 510 (Note 3), RL = 100 Unless Otherwise Specified (Continued)

PARAMETER

TEST CONDITIONS

(NOTE 2)

TEST TEMP.

LEVEL (oC)

MIN

TYP

MAX

UNITS

Slew Rate

(VOUT = 5VP-P, AV = -1, RF = 330)

+SR

-SR (Note 6)

B

25

-

2300

-

V/s

B

25

-

1200

-

V/s

Settling Time

(VOUT = +2V to 0V step, Note 5)

To 0.1%

To 0.05%

B

25

-

23

-

ns

B

25

-

33

-

ns

To 0.02%

B

25

-

45

-

ns

VIDEO CHARACTERISTICS AV = +2, RF = 250 Unless Otherwise Specified

Differential Gain (f = 3.58MHz)

RL = 150

B

25

-

0.02

-

RL = 75

B

25

-

0.03

-

Differential Phase (f = 3.58MHz)

RL = 150

B

25

-

0.04

-

RL = 75

B

25

-

0.06

-

OUTPUT LIMITING CHARACTERISTICS AV = +2, RF = 250 VH = +1V, VL = -1V, Unless Otherwise Specified

Limit Accuracy (Note 5)

VIN = 2V, AV = -1,

RF = 510

A

Full

-125

25

125

Overdrive Recovery Time (Note 5)

VIN = 1V

B

25

-

0.8

-

Negative Limit Range

B

25

-5.0 to +2.5

%

%

Degrees

Degrees

mV

ns

V

Positive Limit Range

B

25

-2.5 to +5.0

V

Limit Input Bias Current

A

25

-

50

200

A

A

Full

-

80

200

A

POWER SUPPLY CHARACTERISTICS

Power Supply Range

C

25

4.5

-

5.5

V

Power Supply Current (Note 5)

A

Full

6.4

6.9

7.3

mA

NOTES:

2. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only.

3. The optimum feedback resistor for the HFA1135 at AV = +1 is 1.5k. The Production Tested parameters are tested with RF = 510 because

the HFA1135 shares test hardware with the HFA1105 amplifier.

4. Undershoot dominates for output signal swings below GND (e.g., 0.5VP-P), yielding a higher overshoot limit compared to the VOUT = 0V to 0.5V

condition. See the “Application Information” section for details.

5. See Typical Performance Curves for more information.

6. Slew rates are asymmetrical if the output swings below GND (e.g., a bipolar signal). Positive unipolar output signals have symmetric positive and

negative slew rates comparable to the +SR specification. See the “Application Information” section, and the pulse response graphs for details.

Application Information

Relevant Application Notes

The following Application Notes pertain to the HFA1135:

• AN9653-Use and Application of Output Limiting

Amplifiers

• AN9752-Sync Stripper and Sync Inserter for Composite

Video

• AN9787-An Intuitive Approach to Understanding Current

Feedback Amplifiers

• AN9420-Current Feedback Amplifier Theory and

Applications

• AN9663-Converting from Voltage Feedback to Current

Feedback Amplifiers

These publications may be obtained from Intersil’s web site at

www.intersil.com.

Optimum Feedback Resistor

Although a current feedback amplifier’s bandwidth dependency

on closed loop gain isn’t as severe as that of a voltage

feedback amplifier, there can be an appreciable decrease in

bandwidth at higher gains. This decrease may be minimized by

taking advantage of the current feedback amplifier’s unique

relationship between bandwidth and RF. All current feedback

amplifiers require a feedback resistor, even for unity gain

applications, and RF, in conjunction with the internal

compensation capacitor, sets the dominant pole of the

frequency response. Thus, the amplifier’s bandwidth is

inversely proportional to RF. The HFA1135 design is optimized

for a 250 RF at a gain of +2. Decreasing RF decreases

stability, resulting in excessive peaking and overshoot (Note:

Capacitive feedback will cause the same problems due to the

FN3653 Rev.6.00

January 23, 2006

Page 4 of 15

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