- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄8528 > HA9P5020-5ZX96 (Intersil)IC OPAMP CFA 100MHZ 8-SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | HA9P5020-5ZX96 |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 3/23頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP CFA 100MHZ 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 應(yīng)用： | 電流反饋 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 100MHz |
| 轉(zhuǎn)換速率： | 1100 V/µs |
| 電流 - 電源： | 7.5mA |
| 電流 - 輸出 / 通道： | 31.7mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 18 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)
11
FN2845.12
May 21, 2013
Referring to Figure 7, it can be seen that R6 will act as a pull-up
resistor to +VCC if the DISABLE pin is left open. In those cases
where the enable/disable function is not required on all circuits
some circuits can be permanently enabled by letting the
DISABLE pin float. If a driver is used to set the enable/disable
level, be sure that the driver does not sink more than 20
μA
when the DISABLE pin is at a high level. TTL gates, especially
CMOS versions, do not violate this criteria so it is permissible to
control the enable/disable function with TTL.
Typical Applications
Two Channel Video Multiplexer
Referring to the amplifier U1A in Figure 8, R1 terminates the
cable in its characteristic impedance of 75
Ω, and R
4 back
terminates the cable in its characteristic impedance. The
amplifier is set up in a gain configuration of +2 to yield an
overall network gain of +1 when driving a double terminated
cable. The value of R3 can be changed if a different network
gain is desired. R5 holds the disable pin at ground thus
inhibiting the amplifier until the switch, S1, is thrown to
position 1. At position 1 the switch pulls the disable pin up to
the plus supply rail thereby enabling the amplifier. Since all
of the actual signal switching takes place within the amplifier,
it’s differential gain and phase parameters, which are 0.03%
and 0.03° respectively, determine the circuit’s performance.
The other circuit, U1B, operates in a similar manner.
When the plus supply rail is 5V the disable pin can be driven
by a dedicated TTL gate as discussed earlier. If a multiplexer
IC or its equivalent is used to select channels its logic must be
break before make. When these conditions are satisfied the
HA-5020 is often used as a remote video multiplexer, and the
multiplexer may be extended by adding more amplifier ICs.
Low Impedance Multiplexer
Two common problems surface when you try to multiplex
multiple high speed signals into a low impedance source
such as an A/D converter. The first problem is the low source
impedance which tends to make amplifiers oscillate and
causes gain errors. The second problem is the multiplexer
which supplies no gain, introduces all kinds of distortion and
limits the frequency response. Using op amps which have an
enable/disable function, such as the HA-5020, eliminates the
multiplexer problems because the external mux chip is not
needed, and the HA-5020 can drive low impedance (large
capacitance) loads if a series isolation resistor is used.
Referring to Figure 9, both inputs are terminated in their
characteristic impedance; 75
Ω is typical for video
applications. Since the drivers usually are terminated in their
characteristic impedance the input gain is 0.5, thus the
amplifiers, U2, are configured in a gain of +2 to set the circuit
gain equal to one. Resistors R2 and R3 determine the
amplifier gain, and if a different gain is desired R2 should be
changed according to the equation G = (1 + R3/R2). R3 sets
the frequency response of the amplifier so you should refer
to the manufacturers data sheet before changing its value.
R5, C1 and D1 are an asymmetrical charge/discharge time
circuit which configures U1 as a break before make switch to
prevent both amplifiers from being active simultaneously. If
this design is extended to more channels the drive logic
must be designed to be break before make. R4 is enclosed
in the feedback loop of the amplifier so that the large open
loop amplifier gain of U2 will present the load with a small
closed loop output impedance while keeping the amplifier
stable for all values of load capacitance.
The circuit shown in Figure 9 was tested for the full range of
capacitor values with no oscillations being observed; thus,
problem one has been solved. The frequency and gain
characteristics of the circuit are now those of the amplifier
and independent of any multiplexing action; thus, problem
two has been solved. The multiplexer transition time is
approximately 15
μs with the component values shown.
NOTES:
24. U1 is HA-5020.
25. All resistors in
Ω.
26. S1 is break before make.
27. Use ground plane.
VIDEO INPUT #1
VIDEO INPUT #2
R1
75
R3
681
R2
681
R4
75
R5
2000
+
-
U1A
U1B
R9
75
R10
2000
R7
681
R8
681
R6
75
+5V IN
+5V
0.1
μF
10
μF
-5V IN
-5V
0.1
μF
10
μF
+
1
R11
100
VIDEO OUTPUT
TO 75
Ω LOAD
+5V
S1
2
3
ALL
OFF
FIGURE 8. TWO CHANNEL HIGH IMPEDANCE MULTIPLEXER
HA-5020
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VE-BNR-MU-F1 | CONVERTER MOD DC/DC 7.5V 200W |
| 1811797-2 | PLUG 5POS 80 DEG BLK/BLK OVRMLD |
| 1811797-3 | PLUG 5POS 0DEG GRY/GRY OVRMLD |
| ISL59830IAZ-T13 | IC VIDEO DRIVER TRUE SGL 16-QSOP |
| 1811797-1 | PLUG 5POS 0 DEG BLK/BLK OVRMLD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA9P5020-9 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HA9P5033 DIE | 制造商:Intersil Corporation 功能描述: |
| HA9P5033-5 | 制造商:Rochester Electronics LLC 功能描述:BUFFER VIDEO 250MHZ VFB 8PSOP COM - Bulk |
| HA9P5033-9 DIE | 制造商:Harris Corporation 功能描述: |
| HA9P5101-5 | 制造商:Rochester Electronics LLC 功能描述:OPAMP 10MHZ VFB LOWNOISE 8SOIC COM - Bulk |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。