参数资料
| 型号： | ADA4860-1YRJZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/21页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP CF LP 85MA SOT23-6 |
| 产品培训模块： | Practical Guide High Speed PCB Layout |
| 标准包装： | 10,000 |
| 放大器类型： | 电流反馈 |
| 电路数： | 1 |
| 转换速率： | 980 V/µs |
| -3db带宽： | 520MHz |
| 电流 - 输入偏压： | 1.5µA |
| 电压 - 输入偏移： | 3500µV |
| 电流 - 电源： | 6mA |
| 电流 - 输出 / 通道： | 85mA |
| 电压 - 电源，单路/双路(±)： | 5 V ~ 12 V，±2.5 V ~ 6 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 带卷 (TR) |
ADA4860-1
Rev. 0 | Page 17 of 20
LAYOUT AND CIRCUIT BOARD PARASITICS
Careful attention to printed circuit board (PCB) layout prevents
associated board parasitics from becoming problematic and
affecting gain flatness and 3 dB bandwidth. In the printed
circuit environment, parasitics around the summing junction
(inverting input) or output pins can alter pulse and frequency
response. Parasitic capacitance can be unintentionally created
on a PC board via two parallel metal planes with a small vertical
separation (in FR4). To avoid parasitic problems near the
summing junction, signal line connections between the
feedback and gain resistors should be kept as short as possible
to minimize the inductance and stray capacitance. For similar
reasons, termination and load resistors should be located as
close as possible to the respective inputs. Removing the ground
plane on all layers from the area near and under the input and
output pins reduces stray capacitance.
In a second test, 5.6 pF of capacitance was added directly at the
output of the gain = +2 amplifier. Figure 61 shows the results.
Extra output capacitive loading on the ADA4860-1 also causes
bandwidth extensions, as seen in Figure 61. The effect on the
gain = +2 circuit is more pronounced with lighter resistive
loading (1 kΩ). For pulse response behavior with added output
3
–6
–5
–4
–3
–2
–1
1
2
0
1
100
10
1000
N
O
R
M
A
L
IZ
E
D
GA
IN
(
d
B
)
FREQUENCY (MHz)
05
70
9-
0
48
VS = ±5V
G = +2
VOUT = 0.1V p-p
RF = RG = 560
RL = 1k, CL = 5.6pF EXTRA
RL = 100, CL = 5.6pF EXTRA
RL = 1k, CL = 0pF
RL = 100, CL = 0pF
To illustrate the affects of parasitic capacitance, a small
capacitor of 0.4 pF from the amplifiers summing junction
(inverting input) to ground was intentionally added. This was
done on two boards with equal and opposite gains of +2 and 2.
Figure 60 reveals the effects of parasitic capacitance at the
summing junction for both noninverting and inverting gain
circuits. With gain = +2, the additional 0.4 pF of added
capacitance created an extra 43% 3 dB bandwidth extension,
plus some extra peaking. For gain = 2, a 5% increase in 3 dB
bandwidth was created with an extra 0.4 pF on summing
junction.
Figure 61. Small Signal Frequency Response vs. Output Capacitive Load
For more information on high speed board layout, go to:
www.analog.com and
1
–6
–5
–4
–3
–2
–1
0
1
100
10
1000
N
O
R
M
A
L
IZ
E
D
GA
IN
(
d
B
)
FREQUENCY (MHz)
05
70
9-
0
47
VS = ±5V
VOUT = 0.1V p-p
RL = 100
G = +2, RF = 560, CJ = 0.4pF EXTRA
G = –2, RF = 402, CJ = 0.4pF EXTRA
G = –2, RF = 402, CJ = 0pF
G = +2, RF = 560, CJ = 0pF
Figure 60. Small Signal Frequency Response vs.
Added Summing Junction Capacitance
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4860-1YRJZ-RL7 | 功能描述:IC OPAMP CF LP 85MA SOT23-6 RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| ADA4861-3 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, Low Cost, Triple Op Amp |
| ADA4861-3YR-EBZ | 功能描述:BOARD EVAL FOR ADA4861-3YR RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| ADA4861-3YRZ | 功能描述:IC OPAMP CF TRPL LP 100MA 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| ADA4861-3YRZ-RL | 功能描述:IC OPAMP CF TRPL LP 100MA 14SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°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) |
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