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| 型号： | ISL59441IAZ-T7 |
| 厂商： | INTERSIL CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | 900MHz Multiplexing Amplifier |
| 中文描述： | 4-CHANNEL, VIDEO MULTIPLEXER, PDSO16 |
| 封装： | LEAD FREE, 0.150 INCH, QSOP-16 |
| 文件页数： | 9/12页 |
| 文件大小： | 571K |
| 代理商： | ISL59441IAZ-T7 |
9
FN6163.2
September 21, 2005
Application Information
General
The ISL59441 is a 4:1 mux that is ideal as a matrix element
in high performance switchers and routers. The ISL59441 is
optimized to drive 5pF in parallel with a 500
load. The
capacitance can be split between the PCB capacitance and
an external load capacitance. Its low input capacitance and
high input resistance provide excellent 50
or 75
terminations.
Parasitic Effects on Frequency Performance
Capacitance at the Inverting Input
The AC performance of current-feedback amplifiers in the
non-inverting gain configuration is strongly affected by stray
capacitance at the inverting input. Stray capacitance from
the inverting input pin to the output (C
F
), and to ground (C
G
),
increase gain peaking and bandwidth. Large values of either
capacitance can cause oscillation. The ISL59441 has been
optimized for a 0.4pF to 0.7pF capacitance (C
G
).
Capacitance (C
F
) to the output should be minimized. To
achieve optimum performance the feedback network
resistor(s) must be placed as close to the device as possible.
Trace lengths greater than 1/4 inch combined with resistor
pad capacitance can result in inverting input to ground
capacitance approaching 1pF. Inverting input and output
traces should not run parallel to each other. Small size
surface mount resistors (604 or smaller) are recommended.
Capacitance at the Output
The output amplifier is optimized for capacitance to ground
(C
L
) directly on the output pin. Increased capacitance
causes higher peaking with an increase in bandwidth. The
optimum range for most applications is ~1.0pF to ~6pF. The
optimum value can be achieved through a combination of
PC board trace capacitance (C
T
) and an external capacitor
(C
OUT)
. A good method to maintain control over the output
pin capacitance is to minimize the trace length (C
T
) to the
next component, and include a discrete surface mount
capacitor (C
OUT
) directly at the output pin.
Feedback Resistor Values
The AC performance of the output amplifier is optimized with
the feedback resistor network (R
F
, R
G
) values
recommended in the application circuits. The amplifier
bandwidth and gain peaking are directly affected by the
value(s) of the feedback resistor(s) in unity gain and gain >1
configurations. Transient response performance can be
tailored simply by changing these resistor values. Generally,
lower values of R
F
and R
G
increase bandwidth and gain
peaking. This has the effect of decreasing rise/fall times and
increasing overshoot.
Ground Connections
For the best isolation and crosstalk rejection, the GND pin
and NIC pins must connect to the GND plane.
Application Circuits
FIGURE 25A. GAIN OF 1 APPLICATION CIRCUIT
FIGURE 25B. GAIN OF 2 APPLICATION CIRCUIT
V
IN
50
301
C
G
PC BOARD
CAPACITANCE
-
+
0.4pF < C
G
< 0.7pF
0.6pF
*C
L
: TOTAL LOAD CAPACITANCE
C
T
: TRACE CAPACITANCE
C
OUT
: OUTPUT CAPACITANCE
C
OUT
0pF
R
L =
500
V
OUT
*C
L =
C
T
+ C
OUT
C
T
1.6pF
V
IN
50
205
C
G
PC BOARD
CAPACITANCE
-
+
205
0.4pF < C
G
< 0.7pF
0.6pF
C
OUT
0pF
R
L =
500
V
OUT
*C
L =
C
T
+ C
OUT
C
T
1.6pF
ISL59441
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL59442 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:1GHz, 4 x 1 Multiplexing Amplifier |
| ISL59442_07 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:1GHz, 4 x 1 Multiplexing Amplifier |
| ISL59442IB | 功能描述:IC CROSSPOINT SW 1GHZ 4X1 14SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:TFT-LCD 面板：VCOM 驱动器 输出类型:满摆幅 电路数:1 -3db带宽:35MHz 转换速率:40 V/µs 电流 - 电源:3.7mA 电流 - 输出 / 通道:1.3A 电压 - 电源，单路/双路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 供应商设备封装:8-uMax-EP 包装:管件 |
| ISL59442IB-T13 | 功能描述:IC CROSSPOINT SW 1GHZ 4X1 14SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:TFT-LCD 面板：VCOM 驱动器 输出类型:满摆幅 电路数:1 -3db带宽:35MHz 转换速率:40 V/µs 电流 - 电源:3.7mA 电流 - 输出 / 通道:1.3A 电压 - 电源，单路/双路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 供应商设备封装:8-uMax-EP 包装:管件 |
| ISL59442IB-T7 | 功能描述:IC CROSSPOINT SW 1GHZ 4X1 14SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:TFT-LCD 面板：VCOM 驱动器 输出类型:满摆幅 电路数:1 -3db带宽:35MHz 转换速率:40 V/µs 电流 - 电源:3.7mA 电流 - 输出 / 通道:1.3A 电压 - 电源，单路/双路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 供应商设备封装:8-uMax-EP 包装:管件 |
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