參數(shù)資料
型號: AD823AR-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 6/20頁
文件大?。?/td> 0K
描述: IC OPAMP JFET R-R DUAL LN 8SOIC
標準包裝: 750
放大器類型: J-FET
電路數(shù): 2
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 25 V/µs
-3db帶寬: 16MHz
電流 - 輸入偏壓: 5pA
電壓 - 輸入偏移: 700µV
電流 - 電源: 7mA
電流 - 輸出 / 通道: 17mA
電壓 - 電源,單路/雙路(±): 3 V ~ 36 V,±1.5 V ~ 18 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)
供應商設備封裝: 8-SO
包裝: 帶卷 (TR)
其它名稱: AD823AR-REEL7TR
AD823
Data Sheet
Rev. E | Page 14 of 20
OUTPUT IMPEDANCE
The low frequency open-loop output impedance of the common-
emitter output stage used in this design is approximately 30 k.
Although this is significantly higher than a typical emitter
follower output stage, when it is connected with feedback, the
output impedance is reduced by the open-loop gain of the op
amp. With 109 dB of open-loop gain, the output impedance is
reduced to <0.2 . At higher frequencies, the output impedance
rises as the open-loop gain of the op amp drops; however, the
output also becomes capacitive due to the integrator capacitors
C1 and C2. This prevents the output impedance from ever
becoming excessively high (see Figure 18), which can cause
stability problems when driving capacitive loads. In fact, the AD823
has excellent cap-load drive capability for a high frequency op
amp. Figure 34 shows the AD823 connected as a follower while
driving 470 pF direct capacitive load. Under these conditions,
the phase margin is approximately 20°. If greater phase margin
is desired, a small resistor can be used in series with the output
to decouple the effect of the load capacitance from the op amp
(see Figure 26). In addition, running the part at higher gains
also improves the capacitive load drive capability of the op amp.
VOUT
S1N
C1
S1P
C5
R1
gmVI
gm2
C2
R2
00901-
037
Figure 37. Small Signal Schematic
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AD823ARZ 功能描述:IC OPAMP JFET R-R DUAL LN 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源,單路/雙路(±):3 V ~ 32 V,±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP(0.173",4.40mm 寬) 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR
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