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EL2227CS

更新时间： 2024-02-26 18:56:57
品牌 Logo 应用领域
英特矽尔 - INTERSIL 放大器光电二极管
页数 文件大小 规格书
11页 255K
描述
Dual Very Low Noise Amplifier

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EL2227CS 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：TSSOP
包装说明：TSSOP,针数：8
Reach Compliance Code：unknown风险等级：5.54
Is Samacsys：N放大器类型：OPERATIONAL AMPLIFIER
最大平均偏置电流 (IIB)：9 µA标称共模抑制比：97 dB
最大输入失调电压：3000 µVJESD-30 代码：S-PDSO-G8
JESD-609代码：e3长度：3 mm
湿度敏感等级：2负供电电压上限：-14 V
标称负供电电压 (Vsup)：-5 V功能数量：2
端子数量：8最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
座面最大高度：1.1 mm标称压摆率：45 V/us
子类别：Operational Amplifier供电电压上限：14 V
标称供电电压 (Vsup)：5 V表面贴装：YES
技术：BIPOLAR温度等级：INDUSTRIAL
端子面层：MATTE TIN端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：40标称均一增益带宽：137000 kHz
宽度：3 mmBase Number Matches：1

EL2227CS 数据手册

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EL2227  
When disabled, both the positive and negative supply  
voltages are disconnected (see Figure 2 below.)  
Applications Information  
Product Des cription  
+12V  
The EL2227 is a dual voltage feedback operational amplifier  
designed especially for DMT ADSL and other applications  
requiring very low voltage and current noise. It also features  
low distortion while drawing moderately low supply current  
and is built on Elantec's proprietary high-speed  
1k  
1µF  
10k  
10k  
1k  
+
-
1µF  
4.7µF  
complementary bipolar process. The EL2227 use a classical  
voltage-feedback topology which allows them to be used in a  
variety of applications where current-feedback amplifiers are  
not appropriate because of restrictions placed upon the  
feedback element used with the amplifier. The conventional  
topology of the EL2227 allows, for example, a capacitor to  
be placed in the feedback path, making it an excellent choice  
for applications such as active filters, sample-and-holds, or  
integrators.  
1k  
75k  
FIGURE 2.  
Power Dis s ipation  
ADSL CPE Applications  
With the wide power supply range and large output drive  
capability of the EL2227, it is possible to exceed the 150°C  
maximum junction temperatures under certain load and  
power-supply conditions. It is therefore important to  
The low noise EL2227 amplifier is specifically designed for  
the dual differential receiver amplifier function with ADSL  
transceiver hybrids as well as other low-noise amplifier  
applications. A typical ADSL CPE line interface circuit is  
shown in Figure 1. The EL2227 is used in receiving DMT  
down stream signal. With careful transceiver hybrid design  
and the EL2227 1.9nV/√Hz voltage noise and 1.2pA/√Hz  
current noise performance, -140dBm/Hz system background  
noise performance can be easily achieved.  
calculate the maximum junction temperature (T  
) for all  
JMAX  
applications to determine if power supply voltages, load  
conditions, or package type need to be modified for the  
EL2227 to remain in the safe operating area. These  
parameters are related as follows:  
R
Line +  
OUT  
Driver  
Input  
T
= T  
+ (θ × PD  
)
MAXTOTAL  
+
-
JMAX  
MAX  
JA  
R
F
F
where:  
PD  
R
G
Z
LINE  
R
is the sum of the maximum power  
MAXTOTAL  
R
OUT  
dissipation of each amplifier in the package (PD  
)
MAX  
-
+
Line -  
PD  
for each amplifier can be calculated as follows:  
MAX  
R
R
F
V
OUTMAX  
R
IN  
----------------------------  
PD  
= 2 × V × I  
+ (V – V ) ×  
OUTMAX  
-
+
MAX  
S
SMAX  
S
Receive  
Out +  
R
L
Receive  
Amplifie  
+
-
R
where:  
T
R
R
IN  
F
Receive  
Out -  
= Maximum Ambient Temperature  
MAX  
FIGURE 1. TYPICAL LINE INTERFACE CONNECTION  
θ
= Thermal Resistance of the Package  
JA  
Dis able Function  
PD  
= Maximum Power Dissipation of 1 Amplifier  
MAX  
The EL2227 is in the standard dual amplifier package  
without the enable/disable function. A simple way to  
implement the enable/disable function is depicted below.  
V = Supply Voltage  
S
I
= Maximum Supply Current of 1 Amplifier  
MAX  
V
= Maximum Output Voltage Swing of the  
OUTMAX  
Application  
R = Load Resistance  
L
To serve as a guide for the user, we can calculate maximum  
allowable supply voltages for the example of the video  
cable-driver below since we know that T  
= 150°C,  
JMAX  
T
= 75°C, I  
SMAX  
= 9.5mA, and the package θ s are  
JA  
MAX  
shown in Table 1. If we assume (for this example) that we  
10  
1...7891011

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