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參數資料
| 型號： | ADA4841-2YRZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| 中文描述： | DUAL OP-AMP, 300 uV OFFSET-MAX, PDSO8 |
| 封裝： | ROHS COMPLIANT, MS-012AA, SOIC-8 |
| 文件頁數： | 18/20頁 |
| 文件大?。?/td> | 442K |
| 代理商： | ADA4841-2YRZ |
ADA4841-1/ADA4841-2
Table 6. Recommended Values and Typical Performance
Rev. C | Page 18 of 20
Gain
+1
+2
1
+5
+10
+20
R
F
(Ω)
0
499
499
499
499
499
R
G
(Ω)
N/A
499
499
124
54.9
26.1
3 dB BW (MHz)
77
34
38
11
5
2.3
Slew Rate (V/μs)
12.5
12.5
12.5
12
12
11.2
Peaking
(dB)
0.9
0.3
0.4
0
0
0
Output Noise ADA4841-1/
ADA4841-2 Only (nV/√Hz)
2
4
4
10
20
40
Total Output Noise Including
Resistors (nV/√Hz)
2
5.73
5.73
11.9
21.1
42.2
Capacitor selection is critical for optimal filter performance.
Capacitors with low temperature coefficients, such as NPO
ceramic capacitors, are good choices for filter elements. Figure 51
shows the filter response.
0
0.03
10
FREQUENCY (MHz)
1
0.1
–40
G
–35
–30
–25
–20
–15
–10
–5
0
5
Figure 51. Filter Frequency Response
LAYOUT CONSIDERATIONS
To ensure optimal performance, careful and deliberate attention
must be paid to the board layout, signal routing, power supply
bypassing, and grounding.
GROUND PLANE
It is important to avoid ground in the areas under and around
the input and output of the ADA4841-1/ADA4841-2. Stray
capacitance created between the ground plane and the input
and output pads of a device are detrimental to high speed
amplifier performance. Stray capacitance at the inverting input,
along with the amplifier input capacitance, lowers the phase
margin and can cause instability. Stray capacitance at the output
creates a pole in the feedback loop. This can reduce phase
margin and can cause the circuit to become unstable.
POWER SUPPLY BYPASSING
Power supply bypassing is a critical aspect in the performance
of the ADA4841-1/ADA4841-2. A parallel connection of
capacitors from each of the power supply pins to ground works
best. A typical connection is shown in Figure 50. Smaller value
capacitors offer better high frequency response where larger
value electrolytics offer better low frequency performance.
Paralleling different values and sizes of capacitors helps to
ensure that the power supply pins are provided a low ac impedance
across a wide band of frequencies. This is important for minimizing
the coupling of noise into the amplifier. This can be especially
important when the amplifier PSR is starting to roll off—the
bypass capacitors can help lessen the degradation in PSR
performance.
Starting directly at the ADA4841-1/ADA4841-2 power supply
pins, the smallest value capacitor should be placed on the same
side of the board as the amplifier, and as close as possible to the
amplifier power supply pin. The ground end of the capacitor
should be connected directly to the ground plane. Keeping the
capacitors’ distance short but equal from the load is important
and can improve distortion performance. This process should
be repeated for the next largest value capacitor.
It is recommended that a 0.1 μF ceramic 0508 case be used. The
0508 case size offers low series inductance and excellent high
frequency performance. A 10 μF electrolytic capacitor should be
placed in parallel with the 0.1 μF capacitor. Depending on the
circuit parameters, some enhancement to performance can be
realized by adding additional capacitors. Each circuit is different
and should be individually analyzed for optimal performance.
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| ADA4841-2YRZ-R7 | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| ADA4841-2YRZ-RL | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| ADA4841-X | 16-Bit, 8-Channel, 250 kSPS PulSAR㈢ ADC. |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADA4841-2YRZ-R7 | 功能描述:IC OPAMP VF R-R DUAL LP LN 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:100 系列:- 放大器類型:通用 電路數:1 輸出類型:- 轉換速率:0.2 V/µs 增益帶寬積:- -3db帶寬:- 電流 - 輸入偏壓:100pA 電壓 - 輸入偏移:30µV 電流 - 電源:380µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):±2 V ~ 18 V 工作溫度:0°C ~ 70°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:管件 |
| ADA4841-2YRZ-RL | 功能描述:IC OPAMP VF R-R DUAL LP LN 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:電流檢測 電路數:1 輸出類型:- 轉換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應商設備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱:MAX9634WERS+TCT |
| ADA4841-X | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 8-Channel, 250 kSPS PulSAR ADC |
| ADA4850-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Rail-to-Rail Output Op Amps with Ultralow Power-Down |
| ADA4850-1_07 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Rail-to-Rail Output Op Amps with Ultralow Power-Down |
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