- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376243 > op275 (Analog Devices, Inc.) Audio Dual OP AMP(音頻雙運(yùn)算放大器) PDF資料下載
參數(shù)資料
| 型號(hào)： | op275 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Audio Dual OP AMP(音頻雙運(yùn)算放大器) |
| 中文描述： | 音頻雙運(yùn)算放大器（音頻雙運(yùn)算放大器） |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大小： | 200K |
| 代理商： | OP275 |
OP275
REV. A
–9–
+15V
+
0.1μF
2
3
8
1
4
V
IN
V
OUT
R
L
2k
–15V
10μF
+
0.1μF
1/2
OP275
10μF
Figure 12. Unity Gain Follower
0.1μF
+15V
+
10μF
2
3
8
1
4
V
IN
V
OUT
2k
–15V
10μF
0.1μF
10pF
4.99k
2.49k
4.99k
+
1/2
OP275
Figure 13. Unity Gain Inverter
In inverting and noninverting applications, the feedback resis-
tance forms a pole with the source resistance and capacitance
(R
S
and C
S
) and the OP275’s input capacitance (C
IN
), as shown
in Figure 14. With R
S
and R
F
in the kilohm range, this pole can
create excess phase shift and even oscillation. A small capacitor,
C
FB
, in parallel and R
FB
eliminates this problem. By setting R
S
(C
S
+ C
IN
) = R
FB
C
FB
, the effect of the feedback pole is com-
pletely removed.
R
FB
C
IN
R
S
C
S
C
FB
V
OUT
Figure 14. Compensating the Feedback Pole
Attention to Source Impedances Minimizes Distortion
Since the OP275 is a very low distortion amplifier, careful atten-
tion should be given to source impedances seen by both inputs.
As with many FET-type amplifiers, the p-channel JFETs in the
OP275’s input stage exhibit a gate-to-source capacitance that
varies with the applied input voltage. In an inverting configura-
tion, the inverting input is held at a virtual ground and, as such,
does not vary with input voltage. Thus, since the gate-to-source
voltage is constant, there is no distortion due to input capaci-
tance modulation. In noninverting applications, however, the
gate-to-source voltage is not constant. The resulting capacitance
modulation can cause distortion above 1 kHz if the input im-
pedance is > 2 k
and unbalanced.
Figure 15 shows some guidelines for maximizing the distortion
performance of the OP275 in noninverting applications. The
best way to prevent unwanted distortion is to ensure that the
parallel combination of the feedback and gain setting resistors
(R
F
and R
G
) is less than 2 k
. Keeping the values of these resis-
tors small has the added benefits of reducing the thermal noise
0P275
V
IN
V
OUT
R
F
R
G
R
S*
* R
S
= R
G
//R
F
IF R
G
//R
F
> 2k
FOR MINIMUM DISTORTION
Figure 15. Balanced Input Impedance to Minimize
Distortion in Noninverting Amplifier Circuits
16–20V
0.1μF
V+
±
5V
R
L
1k
D1
D2
+15V
2N4416
1k
D3
D4
OUTPUT
(TO SCOPE)
1μF
10k
IC2
R
F
2k
750
2N2222A
15k
–15V
1N4148
DUT
1/2 OP260AJ
16–20V
0.1μF
10k
–
+
+
–
SCHOTTKY DIODES D1–D4 ARE
HEWLETT-PACKARD HP5082-2835
IC1 IS 1/2 OP260AJ
IC2 IS PMI OP41EJ
V–
R
G
222
Figure 11.OP275’s Settling Time Test Fixture
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OP275 | Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275GP | Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275GS | Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275GSR | Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275GBC | Dual Bipolar/JFET, Audio Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP275_04 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275AZ/883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| OP275GBC | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275GP | 制造商:Analog Devices 功能描述:OP Amp Dual GP 制造商:Analog Devices 功能描述:IC OP AMP AUDIO JFET DIP8 275 |
| OP275GPZ | 功能描述:IC AMP AUDIO STER CLASS AB 8DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:MicroAmplifier™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:5pA 電壓 - 輸入偏移:1500µV 電流 - 電源:220µA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 36 V，±2.25 V ~ 18 V 工作溫度:-40°C ~ 85°C 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-SOIC 包裝:剪切帶 (CT) 其它名稱:296-29363-1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。