- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄5552 > ISL55210IRTZ-T7 (Intersil)IC OPAMP DIFF 2200MHZ LP 16TQFN PDF資料下載
參數(shù)資料
| 型號(hào)： | ISL55210IRTZ-T7 |
| 廠商： | Intersil |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP DIFF 2200MHZ LP 16TQFN |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 5600 V/µs |
| 增益帶寬積： | 4GHz |
| -3db帶寬： | 2.2GHz |
| 電流 - 輸入偏壓： | 50µA |
| 電壓 - 輸入偏移： | 100µV |
| 電流 - 電源： | 35mA |
| 電流 - 輸出 / 通道： | 45mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 4.2 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN（3x3） |
| 包裝： | 帶卷 (TR) |
ISL55210
12
FN7811.2
June 6, 2013
For instance, if a minimum noise configuration is not required,
but it is desirable to increase the feedback resistors to reduce the
added loading they present to the output stage, the RG and RF
resistors can be scaled up to achieve the same gain with an
additional termination resistance added across the input
transformer to adjust the termination impedance. Figure 31
shows an example using a 1:2 input turns ratio where the RG and
RF elements have been scaled up and a shunt termination
resistance added. This example provides a single to differential
signal gain of 20dB and input impedance of 50 to the source.
The 1:2 turn ratio transformer needs a 200 differential
secondary impedance to provide an input side 50 match. This is
provided here by the parallel combination of the 2 -200 RG
resistors and the 400 parallel impedance at the transformer
secondary.
This circuit has scaled the feedback resistor up to 1k to still
achieve the amplifier gain of 5V/V which gives the overall gain of
10V/V (20dB) when the 1:2 step up at the input is considered.
The particular transformer shown is typical of 1:2 turns ratio
broadband transformers, but there a many alternates with the
similar or improved characteristics.
This input interface also simplifies the input common mode
control. The VCM pin controls the output common mode voltage.
In most DC coupled FDA applications, the input common mode
voltage is determined by both this output common mode and the
source signal. In a configuration like Figure 31, there is no path
for a common mode current to flow from output to input, so the
input common mode voltage equals the output. A similar effect
could be achieved with just two blocking caps on the two RG
resistors. A DC coupled, single to differential, configuration will
also have a common mode input that is moving with the input
signal. Converting to just a differential signal at the amplifier, as
in Figure 31, removes any input signal related artifacts from the
input common mode making the ISL55210 behave as a
differential only VFA amplifier. There is only a very small
differential error signal at the inputs set by the loop gain, as in a
normal single ended VFA application, but no common mode
signal related terms.
The examples shown are using the transformer to convert from
single to differential. However, if the source is already
differential, these same transformer input circuits can drive the
transformer differentially still providing impedance scaling if
needed and common mode rejection for both DC and AC
common mode issues. A good example would be differential
mixer outputs or SAW filter outputs. Those differential sources
could also be connected into the ISL55210 RG resistors through
blocking caps as well eliminating the input transformer. The AC
termination impedance for the differential source will then be
the sum of the two RG resistors when simple blocking caps are
used.
Amplifier I/O Range Limits
The ISL55210 is intended principally to give the lowest IM3
performance on the lowest power for a differential I/O
application. The amplifier will work DC coupled and over a
relatively wide supply range of 3.0V to 4.2V supplies. The outputs
have both a differential and common mode operating range
while the input pins have a common operating range. For single
supply operation, the ground pins are at ground as is the exposed
metal pad on the underside of the package. The ISL55210 can
operate split supply where then the ground pins will be a
negative supply voltage and the exposed metal pad is either
connected to this negative supply or left unconnected on an
insulating board layer.
Briefly, the I/O and VCM limits are:
1. Maximum VCM setting = -VS + 2V
2. Input common mode operating range of -VS + 1.1V or the
output VCM + 0.5V
3. Output VO minimum (on each side) is either -VS + 0.3V or
output VCM - 0.9V
4. Output VO maximum (on each side) is +VS - 1.5V
The output swing limits are often asymmetrical around the VCM
voltage. The maximum single ended swings are set by these two
limits:
VOMIN is either -VS + 0.3V or VCM - 0.9V whichever is less. So for
instance on a single 3.3V supply with the default VCM voltage of
1.2V, these two limits give the same result and the output pins
can swing down to 0.3V above -VS = 0V. If, however, the VCM pin
is raised to 1.5V, then the minimum output voltage will become
1.5V - 0.9V = 0.6V.
VOMAX is set by a headroom limit to the positive supply to be:
VOMAX = +VS - 1.5V. Again, on a 3.3V single supply and the
default 1.2V VCM setting, this mean the maximum referenced to
ground output pin voltages can be 3.3V - 1.5V = +1.8V or 0.6V
above the default VCM voltage.
Using these default conditions, and the maximum positive
excursion of 0.6V above the 1.2V output VCM setting, the
maximum differential VP-P swing will be 4X this 0.6V single
ended limit or 2.4VP-P. Where +VS is increased the limit then
becomes the 0.9V below VCM, but then the absolute maximum
differential VP-P is then 4X 0.9V to 3.6VP-P. So, for instance, to
get this maximum output swing, increase the supply voltage until
+VS - 1.5V > VCM + 0.9V. If we assume a VCM voltage of 1.3V for
instance, then 1.3V + 0.9V + 1.5V = 3.7V will give an unclipped
FIGURE 31. SINGLE TO DIFFERENTIAL WITH REDUCED FEEDBACK
LOADING
1F
1:2
ISL55210
+3.3V
+
-
Vi
ADT4-
1WT
VCM
VO
RF
RG
50
1k
200
400
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RP2012T-R47-F | RES HP .47 OHM 1/3W 1% 0805 SMD |
| 8609342E113755000E1 | DIN RA HEADER F |
| 0MEG100.X | FUSE 100A 32V NON STD SLOW |
| 0MEG175.X | FUSE 175A 32V NON STD SLOW |
| EL5360IUZ | IC AMP CFA TRIPLE 200MHZ 16-QSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL55210IRTZ-T7A | 功能描述:差分放大器 ISL55210IRTZ WIDEBAN ULTRA-HI DYNAMIC RA RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| ISL55210IRTZ-T7S2705 | 制造商:Intersil Corporation 功能描述:CISCO, ISL55210IRTZ-T W/CONTAINER LABELING - Rail/Tube |
| ISL55211 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Wideband, Low Noise, Low Distortion, Fixed Gain, Differential Amplifier |
| ISL55211IRTZ | 制造商:Intersil Corporation 功能描述:ISL55211IRTZ PB-FREE ULTRA LOW DISTORTION DIFFERENTIAL DRIVE - Bulk 制造商:Intersil Corporation 功能描述:Special Purpose Amplifiers ISL59604IRZ AUTO EQ OF COMPOSITE VID 制造商:Intersil Corporation 功能描述:ISL55211IRTZ Pb-Free Ultra Low Distortion Differential Drive |
| ISL55211IRTZ-EVAL1Z | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Wideband, Low Noise, Low Distortion, Fixed Gain, Differential Amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。