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| 型号： | ADA4841-2YRZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/21页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP VF R-R DUAL LP LN 8SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 电压反馈 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 13 V/µs |
| -3db带宽： | 80MHz |
| 电流 - 输入偏压： | 3µA |
| 电压 - 输入偏移： | 40µV |
| 电流 - 电源： | 1.2mA |
| 电流 - 输出 / 通道： | 60mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，±1.35 V ~ 6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
ADA4841-1/ADA4841-2
Rev. E | Page 18 of 20
Table 6. Recommended Values and Typical Performance
Gain
RF (Ω)
RG (Ω)
3 dB BW (MHz)
Slew Rate (V/μs)
Peaking
(dB)
Output Noise ADA4841-1/
ADA4841-2 Only (nV/√Hz)
Total Output Noise
Including Resistors (nV/√Hz)
+1
0
N/A
77
12.5
0.9
2
+2
499
34
12.5
0.3
4
5.73
1
499
38
12.5
0.4
4
5.73
+5
499
124
11
12
0
10
11.9
+10
499
54.9
5
12
0
20
21.1
+20
499
26.1
2.3
11.2
0
40
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.
05614-043
0.03
10
FREQUENCY (MHz)
1
0.1
–40
GAIN
(
d
B)
–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 49. 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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相关代理商/技术参数 |
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| ADA4841-2YRZ-RL | 功能描述:IC OPAMP VF R-R DUAL LP LN 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 放大器类型:电流检测 电路数:1 输出类型:- 转换速率:- 增益带宽积:125kHz -3db带宽:- 电流 - 输入偏压:- 电压 - 输入偏移:100µV 电流 - 电源:1.1µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:4-WFBGA，CSPBGA 供应商设备封装:4-UCSP（2x2） 包装:剪切带 (CT) 其它名称:MAX9634WERS+TCT |
| ADA4841-X | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 8-Channel, 250 kSPS PulSAR ADC |
| ADA4850-1 | 制造商:AD 制造商全称: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 制造商全称:Analog Devices 功能描述:High Speed, Rail-to-Rail Output Op Amps with Ultralow Power-Down |
| ADA4850-1YCPZ-R2 | 功能描述:IC OPAMP VF R-R 118MA 8LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
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