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參數(shù)資料
| 型號(hào)： | AD8620BR-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational Amplifier |
| 中文描述： | DUAL OP-AMP, 300 uV OFFSET-MAX, 25 MHz BAND WIDTH, PDSO8 |
| 封裝： | MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 414K |
| 代理商： | AD8620BR-REEL |
REV. D
–10–
AD8610/AD8620
Driving Large Capacitive Loads
The AD8610 has excellent capacitive load driving capability and
can safely drive up to 10 nF when operating with
±
5 V supply.
Figures 4 and 5 compare the AD8610/AD8620 against the OPA627
in the noninverting gain configuration driving a 10 k
resistor and
10,000 pF capacitor placed in parallel on its output, with a square
wave input set to a frequency of 200 kHz. The AD8610 has much
less ringing than the OPA627 with heavy capacitive loads.
TIME – 2 s/DIV
V
V
S
= 5V
R
L
= 10k
C
L
= 10,000pF
Figure 4. OPA627 Driving C
L
= 10,000 pF
TIME – 2 s/DIV
V
V
S
= 5V
R
L
= 10k
C
L
= 10,000pF
Figure 5. AD8610/AD8620 Driving C
L
= 10,000 pF
The AD8610/AD8620 can drive much larger capacitances without
any external compensation. Although the AD8610/AD8620 is stable
with very large capacitive loads, remember that this capacitive
loading will limit the bandwidth of the amplifier. Heavy
capacitive
loads will also increase the amount of overshoot and ringing
at the
output. Figures 7 and 8 show the AD8610/AD8620 and the OPA627
in a noninverting gain of +2 driving 2
μ
F of capacitance load. The
ringing on the OPA627 is much larger in magnitude and continues
more than 10 times longer than the AD8610.
V
IN
= 50mV
2k
2k
–5V
+5V
2 F
3
2
7
4
Figure 6. Capacitive Load Drive Test Circuit
TIME – 20 s/DIV
V
V
S
= 5V
R
L
= 10k
C
L
= 2 F
Figure 7. OPA627 Capacitive Load Drive, A
V
= +2
TIME – 20 s/DIV
V
V
S
= 5V
R
L
= 10k
C
L
= 2 F
Figure 8. AD8610/AD8620 Capacitive Load Drive, A
V
= +2
Slew Rate (Unity Gain Inverting vs. Noninverting)
Amplifiers generally have a faster slew rate in an inverting unity
gain configuration due to the absence of the differential input
capacitance. Figures 9 through 12 show the performance of the
AD8610 configured in a gain of –1 compared to the OPA627.
The AD8610 slew rate is more symmetrical, and both the positive
and negative transitions are much cleaner than in the OPA627.
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相關(guān)代理商/技術(shù)參數(shù) |
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| AD8620BRZ-REEL | 功能描述:IC OPAMP JFET 25MHZ DUAL 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
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