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參數(shù)資料
| 型號： | AD829JRZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VIDEO OPAMP LN HS 8-SOIC |
| 標準包裝： | 750 |
| 應用： | 電壓反饋 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 120MHz |
| 轉換速率： | 230 V/µs |
| 電流 - 電源： | 5.3mA |
| 電流 - 輸出 / 通道： | 32mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 18 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOICN |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | AD829JRZ-REEL7-ND AD829JRZ-REEL7TR |
AD829
Data Sheet
Rev. I | Page 14 of 20
Because the closed-loop bandwidth is a function of RF and
loop gain, as shown in Figure 41. To preserve stability, the time
constant of RF and CCOMP needs to provide a bandwidth of
<65 MHz. For example, with CCOMP = 15 pF and RF = 1 k, the
small signal bandwidth of the AD829 is 10 MHz. Figure 40
shows that the slew rate is in excess of 60 V/s. As shown in
Figure 41, the closed-loop bandwidth is constant for gains of
1 to 4; this is a property of the current feedback amplifiers.
Figure 39. Inverting Amplifier Connection Using Current Feedback
Compensation
Figure 40. Large Signal Pulse Response of Inverting Amplifier Using Current
Feedback Compensation, CCOMP = 15 pF, C1 = 15 pF RF = 1 k, R1 = 1 k
Figure 41. Closed-Loop Gain vs. Frequency for the Circuit of Figure 38
Figure 42 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/s;
response as a unity-gain inverter, this using component values
of RF = 1 k and CCOMP = 4 pF.
Figure 42. Large Signal Pulse Response of the Inverting Amplifier Using
Current Feedback Compensation, CCOMP = 1 pF, RF = 3 k, R1 = 3 k
Figure 43. Small Signal Pulse Response of Inverting Amplified Using Current
Feedback Compensation, CCOMP = 4 pF, RF = 1 k, R1 = 1 k
00880-039
2
3
7
6
4
–
+
AD829
+VS
–VS
0.1
F
5
0.1
F
C1*
50
50
COAX
CABLE
R1
CCOMP
RF
VOUT
RL
1k
VIN
IN4148
*RECOMMENDED VALUE
OF CCOMP FOR C1
<7pF
0pF
≥7pF
15pF
CCOMP SHOULD NEVER EXCEED
15pF FOR THIS CONNECTION
00880-040
5V
200ns
0%
10
90
100%
00880-041
FREQUENCY (Hz)
CLOSED-LOOP
GAIN
(dB)
100k
1M
10M
–15
–12
–9
–6
–3
0
3
6
9
12
15
100M
GAIN = –4
–3dB @ 8.2MHz
GAIN = –2
–3dB @ 9.6MHz
GAIN = –1
–3dB @ 10.2MHz
VIN = –30dBm
VS = ±15V
RL = 1k
RF = 1k
CCOMP = 15pF
C1 = 15pF
00880-042
5V
200ns
0%
10
90
100%
00880-043
20mV
10ns
0%
10
90
100%
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