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BUF04AZ/883 PDF预览

BUF04AZ/883

更新时间： 2024-01-19 17:42:32
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
16页 440K
描述
Closed-Loop High Speed Buffer

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中文翻译

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BUF04AZ/883 技术参数

是否无铅： 不含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：DIP
包装说明：CERDIP-8针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.33.00.01风险等级：5.89
放大器类型：BUFFER最大平均偏置电流 (IIB)：5 µA
标称带宽 (3dB)：110 MHz25C 时的最大偏置电流 (IIB)：5 µA
最大输入失调电压：1000 µVJESD-30 代码：R-GDIP-T8
JESD-609代码：e0负供电电压上限：-18 V
标称负供电电压 (Vsup)：-15 V功能数量：1
端子数量：8最高工作温度：125 °C
最低工作温度：-55 °C最小输出电流：0.05 A
封装主体材料：CERAMIC, GLASS-SEALED封装代码：DIP
封装等效代码：DIP8,.3封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：NOT SPECIFIED
电源：+-5/+-15 V认证状态：Not Qualified
筛选级别：38535Q/M;38534H;883B座面最大高度：5.08 mm
最小摆率：2000 V/us标称压摆率：3000 V/us
子类别：Buffer Amplifier最大压摆率：8.5 mA
供电电压上限：18 V标称供电电压 (Vsup)：15 V
表面贴装：NO技术：BIPOLAR
温度等级：MILITARY端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

BUF04AZ/883 数据手册

 浏览型号BUF04AZ/883的Datasheet PDF文件第7页浏览型号BUF04AZ/883的Datasheet PDF文件第8页浏览型号BUF04AZ/883的Datasheet PDF文件第9页浏览型号BUF04AZ/883的Datasheet PDF文件第11页浏览型号BUF04AZ/883的Datasheet PDF文件第12页浏览型号BUF04AZ/883的Datasheet PDF文件第13页 
BUF04  
A two-terminal equivalent circuit of the BUF04 is shown in  
Figure 30 where the transistor-level equivalent circuit is reduced  
to its essential elements. The input stage develops a signal  
current, IIN, that is replicated by an internal current conveyor so  
as to flow through Rt, the transimpedance of the BUF04. The  
voltage developed across Rt is buffered by a unity-gain output  
voltage follower. With an open-loop Rt of 400 kΩ and an RIN of  
30 Ω, the voltage gain of the BUF04, given by the ratio Rt/RIN is  
approximately 13,000—accurate to approximately 13.5 bits.  
The BUF04’s open-loop ac transimpedance response is  
determined by the open-loop pole formed by Rt and Ct. Since  
Ct is typically 8 pF, the open-loop pole occurs at approximately  
50 kHz.  
To minimize the effects of high-frequency coupling, circuits  
must be built with short interconnect leads, and large ground  
planes should he used whenever possible to provide a low  
resistance, low-inductance circuit path. Sockets should be  
avoided because the increased interlead capacitance can degrade  
bandwidth and stability. If sockets are necessary, individual pin  
sockets (oftentimes called “cage jacks,” AMP Part No.  
5-330808-3 or 5-330808-6) should be used. They contribute far  
less stray reactance than molded socket assemblies.  
Offset Voltage Nulling  
Although the offset voltage of the BUF04 is very low (1 mV,  
maximum) for such a high speed buffer, the circuit shown in  
Figure 32 can be used if additional offset voltage nulling is  
required. A potentiometer ranging from 1 k to 10 k can be used  
for VOS nulling; with a 10 kΩ potentiometer, the trim range is  
±30 mV.  
V
X1  
IN  
R
t
V
I
C
XI  
OUT  
IN  
t
I
V+  
IN  
10µF  
R
IN  
TRIM RANGE  
±30mV  
0.1µF  
R
FB  
1
10k  
8
R
= 30Ω  
IN  
7
3
R = 400 k  
Ω
V
V
OUT  
t
IN  
BUF04  
6
C = 8pF  
t
RFB = 100Ω  
0.1µF  
4
Figure 30. Current-Feedback Functional Equivalent  
Circuit of the BUF04  
10µF  
Grounding and Bypassing Considerations  
V–  
To take full advantage of the BUF04’s very wide bandwidth,  
high slew rates, and dynamic range capabilities requires due  
diligence with regard to supply bypassing. In high speed circuits,  
the supply bypassing network must provide a very low impedance  
return path for currents flowing to and from the load network.  
As with any high speed application, multiple bypassing is always  
recommended. A 10 µF tantalum electrolytic in parallel with a  
0.1 µF ceramic capacitor is sufficient for most applications. For  
those high speed applications where output load currents  
approach 50 mA, small valued resistors (1.1 Ω to 4.7 Ω) in  
series with the tantalum capacitors may improve circuit  
transient response by damping out the capacitor’s self-  
inductance. Figure 31 illustrates bypassing recommendations.  
Figure 32. Optional Offset Voltage Nulling Scheme  
APPLICATIONS  
Output Short-Circuit Protection  
To optimize the transient response and output voltage swing of  
the BUF04, internal output short-circuit current limiting was  
omitted. Although the BUF04 can provide continuous output  
currents of 50 mA without protection, direct connection of the  
BUF04’s output to ground or to the supplies will destroy the  
device. An active current limit technique, illustrated in Figure  
33, provides the necessary short-circuit protection while  
retaining full dc output voltage swing to the load.  
+15V  
10µF  
V+  
10µF  
R1  
RSC1  
≥10Ω  
0.1µF  
2N2905  
KELVIN RETURN  
FOR LOAD CURRENT  
2N2905  
SET ISC +(ISC–) <60mA,  
CONTINUOUS  
0.1µF  
7
0.6V  
RSC1 (RSC2) =  
6
3
ISC + (ISC–)  
V
7
V
IN  
BUF04  
4
OUT  
6
3
V
V
OUT  
R
IN  
R
BUF04  
S
L
0.1µF  
0.1µF  
Ω
6.2k  
0.01µF  
4
10µF  
R2  
2N2219  
KELVIN RETURN  
FOR LOAD CURRENT  
2N2219  
10µF  
V–  
RSC2  
≥10Ω  
NOTE  
USE SHORT LEAD LENGTHS (<5mm)  
Figure 31. Recommended Power-Supply Bypassing  
–15V  
Figure 33. Short-Circuit Current Limiting Using  
Current Sources  
–10–  
REV. 0  
1...78910111213...16

中文翻译

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