AD829SE/883B 데이터 시트보기 (PDF) - Analog Devices

부품명

상세내역

제조사

AD829SE/883B

High Speed, Low Noise Video Op Amp

Analog Devices 

AD829

Figure 11. Large Signal Pulse Response of Inverting

Amplifier Using Current Feedback Compensation,

CCOMP = 15 pF, C1 = 15 pF, RF = 1 kΩ, R1 = 1 kΩ

15

GAIN = –4

12

9

–3dB @ 8.2MHz

GAIN = –2

6

–3dB @ 9.6MHz

3

GAIN = –1

0

–3dB @ 10.2MHz

–3

–6

VIN = –30dBM

VS = ؎15V

–9

RL = 1k⍀

RF = 1k⍀

–12

CCOMP = 15pF

C1 = 15pF

–15

100k

1M

10M

FREQUENCY (Hz)

100M

Figure 12. Closed-Loop Gain vs. Frequency for the Circuit

of Figure 9

Figure 13 is an oscilloscope photo of the pulse response of a

unity gain inverter that has been configured to provide a small

signal bandwidth of 53 MHz and a subsequent slew rate of

180 V/µs; resistor RF = 3 kΩ and capacitor CCOMP = 1 pF. Figure 14

shows the excellent pulse response as a unity gain inverter, this

using component values of RF = 1 kΩ and CCOMP = 4 pF.

Figures 15 and 16 show the closed-loop frequency response of the

AD829 for different closed-loop gains and different supply voltages.

If a noninverting amplifier configuration using current feedback

compensation is needed, the circuit of Figure 17 is recommended.

This circuit provides a slew rate twice that of the shunt com-

pensated noninverting amplifier of Figure 18 at the expense of

gain flatness. Nonetheless, this circuit delivers 95 MHz bandwidth

with ± 1 dB flatness into a back terminated cable, with a differ-

ential gain error of only 0.01% and a differential phase error of

only 0.015° at 4.43 MHz.

Figure 13. Large Signal Pulse Response of the Inverting

Amplifier Using Current Feedback Compensation,

CCOMP = 1 pF, RF = 3 kΩ, R1 = 3 kΩ

Figure 14. Small Signal Pulse Response of Inverting

Amplifier Using Current Feedback Compensation,

CCOMP = 4 pF, RF = 1 kΩ, R1 = 1 kΩ

15

GAIN = –4

12

CCOMP = 2pF

9

GAIN = –2

6

CCOMP = 3pF

3

GAIN = –1

0

CCOMP = 4pF

–3

–6

VS = ؎15V

RL = 1k⍀

–9

RF = 1k⍀

VIN = –30dBM

–12

–15

1

10

100

FREQUENCY (MHz)

Figure 15. Closed-Loop Frequency Response for the

Inverting Amplifier Using Current Feedback Compensation

–12–

REV. G

Share Link: