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參數(shù)資料
| 型號： | AD813ARZ-14-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 7/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP TRIPLE VIDEO LP 14SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 應(yīng)用： | 電流反饋 |
| 電路數(shù)： | 3 |
| -3db帶寬： | 100MHz |
| 轉(zhuǎn)換速率： | 250 V/µs |
| 電流 - 電源： | 4.5mA |
| 電流 - 輸出 / 通道： | 50mA |
| 電壓 - 電源，單路/雙路(±)： | 2.4 V ~ 36 V，±1.2 V ~ 18 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOICN |
| 包裝： | 帶卷 (TR) |
AD813
REV. B
–15–
Overload Recovery
There are three important overload conditions to consider.
They are due to: input common-mode voltage overdrive, out-
put voltage overdrive, and input current overdrive. When the
amplifier is configured for low closed-loop gains, and the input
common-mode voltage range is exceeded, the recovery time will
be very fast, typically under 30 ns. When configured for a
higher gain, and overloaded at the output, the recovery time will
also be short. For example, in a gain of +10, with 6 dB of
input overdrive, the recovery time of the AD813 is about 25 ns
(see Figure 45).
0%
2V
1V
50ns
100
90
10
Figure 45. 6 dB Overload Recovery, G = +10,
(RL = 500 , RF = 357 , VS = ±5 V)
In the case of high gains with very high levels of input overdrive,
a longer recovery time will occur. For example, if the input
common-mode voltage range is exceeded in the gain of +10, the
recovery time will be on the order of 100 ns. This is primarily
due to current overloading of the input stage.
As noted in the warning under Maximum Power Dissipation, a
high level of input overdrive in a high noninverting gain circuit
can result in a large current flow in the input stage. Though this
current is internally limited to about 40 mA, its effect on the
total power dissipation may be significant.
1
10
1000
100
FREQUENCY – MHz
6
9
3
0
–3
CLOSED-LOOP
GAIN
–
dB
RS = 50
RS = 30
RS = 0
VS = 5V
G = +2
RF = 750
RL = 1k
CL = 10pF
Figure 42. Response to a Small Load Capacitor at
VS = ±5 V
1
10
1000
100
FREQUENCY – MHz
6
9
3
0
–3
CLOSED-LOOP
GAIN
–
dB
CL = 150pF, RS = 30
VS = 15V
G = +2
RF = 750
RL = 1k
CL = 510pF, RS = 15
Figure 43. Response to a Large Load Capacitor at
VS = ±15 V
5V
100n s
100
90
10
0%
Figure 44. Circuit of Figure 38 Driving a 510 pF Load
Capacitor, VS = ±15 V (RL = 1 k, RF = RG = 750 ,
RS =15
)
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