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參數資料
| 型號： | AD8031AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| 中文描述： | OP-AMP, 10000 uV OFFSET-MAX, PDSO8 |
| 封裝： | PLASTIC, SOIC-8 |
| 文件頁數： | 14/16頁 |
| 文件大小： | 247K |
| 代理商： | AD8031AR |
AD8031/AD8032
–14–
REV. B
APPLICATIONS
A 2 MHz Single Supply Biquad Bandpass Filter
Figure 42 shows a circuit for a single supply biquad bandpass
filter with a center frequency of 2 MHz. A 2.5 V bias level is
easily created by connecting the noninverting inputs of all three
op amps to a resistor divider consisting of two 1 k
resistors
connected between +5 V and ground. This bias point is also
decoupled to ground with a 0.1
μ
F capacitor. The frequency
response of the filter is shown in Figure 43.
In order to maintain an accurate center frequency, it is essential
that the op amp has sufficient loop gain at 2 MHz. This requires
the choice of an op amp with a significantly higher unity gain
crossover frequency. The unity gain crossover frequency of the
AD8031/AD8032 is 40 MHz. Multiplying the open-loop gain by
the feedback factors of the individual op amp circuits yields the
loop gain for each gain stage. From the feedback networks of the
individual op amp circuits, we can see that each op amp has a
loop gain of at least 21 dB. This level is high enough to ensure
that the center frequency of the filter is not affected by the op
amp’s bandwidth. If, for example, an op amp with a gain band-
width product of 10 MHz was chosen in this application, the
resulting center frequency would shift by 20% to 1.6 MHz.
+5V
0.1
m
F
0.1
m
F
V
IN
R2
2k
V
1k
V
1k
V
AD8031
5C1
R1
3k
V
R3
2k
V
+5V
0.1
m
F
R4
2k
V
1/2
AD8032
R5
2k
V
V
OUT
1/2
AD8032
5C2
R6
1k
V
Figure 42. A 2 MHz Biquad Bandpass Filter Using AD8031/
AD8032
1M
FREQUENCY – Hz
10k
100M
G
100k
10M
–50
0
–10
–30
–40
–20
Figure 43. Frequency Response of 2 MHz Bandpass Filter
High Performance Single Supply Line Driver
Even though the AD8031/AD8032 swing close to both rails,
the AD8031 has optimum distortion performance when the
signal has a common-mode level half way between the supplies
and when there is about 500 mV of headroom to each rail. If
low distortion is required in single supply applications for sig-
nals that swing close to ground, an emitter follower circuit can
be used at the op amp output.
+5V
0.1
m
F
7
3
2
2N3904
200
V
V
OUT
6
2.49k
V
49.9
V
4
10
m
F
AD8031
V
IN
2.49k
V
49.9
V
49.9
V
Figure 44. Low Distortion Line Driver for Single Supply
Ground Referenced Signals
相關PDF資料 |
PDF描述 |
|---|---|
| AD8031AR-REEL7 | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031ART-REEL | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031ART-REEL7 | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031B | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
| AD8031BN | 2.7 V, 800 uA, 80 MHz Rail-to-Rail I/O Amplifiers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8031AR-EBZ | 功能描述:BOARD EVAL FOR AD8031AR RoHS:是 類別:編程器，開發系統 >> 評估板 - 運算放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| AD8031AR-REEL | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O 制造商:Rochester Electronics LLC 功能描述:SOIC SINGLE LOW POWER OP AMP - Tape and Reel |
| AD8031AR-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O ±6V/12V 8-Pin SOIC N T/R |
| AD8031ART | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| AD8031ART-EBZ | 功能描述:BOARD EVAL FOR AD8031ART RoHS:是 類別:編程器，開發系統 >> 評估板 - 運算放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
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