参数资料
型号: EL2142CS-T7
厂商: Intersil
文件页数: 4/6页
文件大小: 0K
描述: IC LINE RECEIVER DIFF 8-SOIC
标准包装: 1,000
放大器类型: 差分
电路数: 1
转换速率: 400 V/µs
增益带宽积: 200MHz
-3db带宽: 150MHz
电流 - 输入偏压: 6µA
电压 - 输入偏移: 10000µV
电流 - 电源: 11mA
电流 - 输出 / 通道: 60mA
电压 - 电源,单路/双路(±): 6 V ~ 12.6 V,±3 V ~ 6.3 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-SOIC
包装: 带卷 (TR)
4
FN7049.1
February 11, 2005
Applications Information
Gain Equation
VOUT = ((R2+R1)/R1) x (VIN-VINB+VREF) when R1 tied to
GND
VOUT = ((R2+R1)/R1) x (VIN-VINB) when R1 tied to VREF
Choice of Feedback Resistor
For a gain of one, VOUT may be shorted back to VFB, but
100
Ω-200Ω improves the bandwidth. For gains greater than
one, there is little to be gained from choosing resistor R1
value below 200
Ω, for it would only result in increased power
dissipation and potential signal distortion. Above 200
Ω, the
bandwidth response will develop some peaking (for a gain of
one), but substantially higher R1 values may be used for
higher voltage gains, such as up to 1k
Ω at a gain of four
before peaking will develop.
Capacitance Considerations
As with many high bandwidth amplifiers, the EL2142 prefers
not to drive highly capacitive loads. It is best if the
capacitance on VOUT is kept below 10pF if the user does not
want gain peaking to develop. The VFB node forms a
potential pole in the feedback loop, so capacitance should
be minimized on this node for maximum bandwidth.
The amount of capacitance tolerated on any of these nodes
in an actual application will also be dependent on the gain
setting and the resistor values in the feedback network.
Typical Applications Circuits
FIGURE 1. TYPICAL TWISTED PAIR APPLICATION
50
Ω
VFB
50
Ω
EL2142
VIN
VINB
VREF
VOUT
100
Ω
FIGURE 2. COAXIAL CABLE DRIVER PAIR APPLICATION
EL2142
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