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參數資料
| 型號： | AD8132 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | Low-Cost, High-Speed Differential Amplifier |
| 中文描述： | 低成本，高速差分放大器 |
| 文件頁數： | 16/20頁 |
| 文件大小： | 391K |
| 代理商： | AD8132 |
REV. 0
AD8132
–16–
Driving a Capacitive Load
A purely capacitive load can react with the pin and bondwire
inductance of the AD8132 resulting in high frequency ringing in
the pulse response. One way to minimize this effect is to place a
small capacitor across each of the feedback resistors. The added
capacitance should be small to avoid destabilizing the ampli
fi
er.
An alternative technique is to place a small resistor in series with
the ampli
fi
er
’
s outputs as shown in TPC 47.
LAYOUT, GROUNDING AND BYPASSING
As a high-speed part, the AD8132 is sensitive to the PCB
environment in which it has to operate. Realizing its superior
speci
fi
cations requires attention to various details of good high-
speed PCB design.
The
fi
rst requirement is a good solid ground plane that covers as
much of the board area around the AD8132 as possible. The
only exception to this is that the two input pins (Pins 1 and 8)
should be kept a few mm from the ground plane, and ground
should be removed from inner layers and the opposite side of
the board under the input pins. This will minimize the stray
capacitance on these nodes and help preserve the gain flatness
vs. frequency.
The power supply pins should be bypassed as close as possible
to the device to the nearby ground plane. Good high-frequency
ceramic chip capacitors should be used. This bypassing should
be done with a capacitance value of 0.01
μ
F to 0.1
μ
F for each
supply. Further away, low frequency bypassing should be provided
with 10
μ
F tantalum capacitors from each supply to ground.
The signal routing should be short and direct in order to avoid
parasitic effects. Wherever there are complementary signals, a
symmetrical layout should be provided to the extent possible to
maximize the balance performance. When running differential
signals over a long distance, the traces on PCB should be close
together or any differential wiring should be twisted together to
minimize the area of the loop that is formed. This will reduce
the radiated energy and make the circuit less susceptible to
interference.
CIRCUITS
R
F1
+
R
F2
R
G1
R
G2
Figure 4. Typical Four-Resistor Feedback Circuit
+
R
F2
R
G2
V
IN
Figure 5. Typical Circuit with
β
1 = 0
R
F1
+
R
G1
Figure 6. Typical Circuit with
β
2 = 1
+
V
IN
Figure 7. Resistorless G = 2 Circuit with
β
1 = 0
R
F1
+
R
G1
V
IN
Figure 8. Typical Circuit with
β
2 = 0
相關PDF資料 |
PDF描述 |
|---|---|
| AD8132-EVAL | Low-Cost, High-Speed Differential Amplifier |
| AD8132AR | Low-Cost, High-Speed Differential Amplifier |
| AD8132AR-REEL | Low-Cost, High-Speed Differential Amplifier |
| AD8132AR-REEL7 | Low-Cost, High-Speed Differential Amplifier |
| AD8132ARM | Low-Cost, High-Speed Differential Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8132_06 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost, High Speed Differential Amplifier |
| AD8132_09 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost, High Speed Differential Amplifier |
| AD8132AR | 功能描述:IC AMP DIFF LDIST LP 70MA 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應商設備封裝:16-DFN-EP（5x3） 包裝:管件 |
| AD8132AR | 制造商:Analog Devices 功能描述:SEMICONDUCTORS ((NW)) |
| AD8132AR-EBZ | 功能描述:BOARD EVAL FOR AD8132AR 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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