參數(shù)資料
型號: ADA4860-1YRJZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 7/21頁
文件大小: 0K
描述: IC OPAMP CF LP 85MA SOT23-6
產(chǎn)品培訓模塊: Practical Guide High Speed PCB Layout
標準包裝: 10,000
放大器類型: 電流反饋
電路數(shù): 1
轉換速率: 980 V/µs
-3db帶寬: 520MHz
電流 - 輸入偏壓: 1.5µA
電壓 - 輸入偏移: 3500µV
電流 - 電源: 6mA
電流 - 輸出 / 通道: 85mA
電壓 - 電源,單路/雙路(±): 5 V ~ 12 V,±2.5 V ~ 6 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: SOT-23-6
供應商設備封裝: SOT-23-6
包裝: 帶卷 (TR)
ADA4860-1
Rev. 0 | Page 14 of 20
APPLICATION INFORMATION
POWER SUPPLY BYPASSING
Attention must be paid to bypassing the power supply pins of
the ADA4860-1. High quality capacitors with low equivalent
series resistance (ESR), such as multilayer ceramic capacitors
(MLCCs), should be used to minimize supply voltage ripple
and power dissipation. Generally, a 10 μF tantalum capacitor
located in close proximity to the ADA4860-1 is required to
provide good decoupling for lower frequency signals. In
addition, a 0.1 μF decoupling multilayer ceramic chip capacitor
(MLCC) should be located as close to each of the power supply
pins as is physically possible, no more than inch away. The
ground returns should terminate immediately into the ground
plane. Locating the bypass capacitor return close to the load
return minimizes ground loops and improves performance.
FEEDBACK RESISTOR SELECTION
The feedback resistor has a direct impact on the closed-loop
bandwidth and stability of the current feedback op amp circuit.
Reducing the resistance below the recommended value can
make the amplifier response peak and even become unstable.
Increasing the size of the feedback resistor reduces the closed-
loop bandwidth. Table 5 provides a convenient reference for
quickly determining the feedback and gain set resistor values
and bandwidth for common gain configurations.
Table 5. Recommended Values and Frequency Performance1
Gain
RF (Ω)
RG (Ω)
3 dB
SS BW
(MHz)
3 dB
LS BW
(MHz)
Large
Signal
0.1 dB
Flatness
+1
550
N/A
800
165
40
1
499
400
80
+2
499
520
230
125
+5
348
86.6
335
265
100
+10
348
38.3
165
195
28
1 Conditions: VS = ±5 V, TA = 25°C, RL = 150 Ω.
Figure 51 and Figure 52 show the typical noninverting and
inverting configurations and the recommended bypass
capacitor values.
0
5
709
-01
0
0.1F
10F
–VS
VIN
RG
VOUT
10F
0.1F
+VS
+
ADA4860-1
+
RF
+
Figure 51. Noninverting Gain
0
57
09
-01
1
0.1F
10F
–VS
VIN
VOUT
10F
0.1F
+VS
ADA4860-1
+
RF
RG
+
Figure 52. Inverting Gain
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