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參數(shù)資料
| 型號(hào)： | ISL59421 |
| 廠商： | Intersil Corporation |
| 英文描述： | 865MHz Multiplexing Amplifier |
| 中文描述： | 865MHz復(fù)用放大器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 561K |
| 代理商： | ISL59421 |
9
FN7458.1
September 21, 2005
Application Circuits
Application Information
General
The ISL59421 is a 2:1 mux that is ideal as a matrix element
in high performance switchers and routers. The ISL59421 is
optimized to drive 5pF in parallel with a 500
load. The
capacitance can be split between the PCB capacitance an
and 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 ISL59421 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.
FIGURE 25A.
GAIN OF 1 APPLICATION CIRCUIT
FIGURE 25B.
GAIN OF 2 APPLICATION CIRCUIT
V
IN
50
357
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
3.3pF
R
L
= 500
V
OUT
*C
L
= C
T
+ C
OUT
C
T
1.6pF
V
IN
50
100
C
G
PC BOARD
CAPACITANCE
-
+
100
0.4pF < C
G
< 0.7pF
0.6pF
C
OUT
4.7pF
R
L
= 500
V
OUT
*C
L
= C
T
+ C
OUT
C
T
1.6pF
ISL59421
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| ISL59421IU | 功能描述:IC AMP MULTIPLEX 865MHZ 10-MSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59421IU-T13 | 功能描述:IC AMP MULTIPLEX 865MHZ 10-MSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59421IU-T7 | 功能描述:IC AMP MULTIPLEX 865MHZ 10-MSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59421IUZ | 功能描述:視頻放大器 ISL80101 EVAL 2 10LD 1A BAG&SHIP IC DIFER RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| ISL59421IUZ-T13 | 功能描述:IC AMP MULTIPLEX 865MHZ 10-MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動(dòng)器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
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