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參數(shù)資料
| 型號： | HA5023IP |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Dual 125MHz Video Current Feedback Amplifier |
| 中文描述： | VIDEO AMPLIFIER, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 16/19頁 |
| 文件大小： | 813K |
| 代理商： | HA5023IP |
DESIGN INFORMATION
(Continued)
The information contained in this section has been developed through characterization by Intersil Corporation and is for use as application
and design information only. No guarantee is implied.
16
HA5023
Application Information
Optimum Feedback Resistor
The plots of inverting and non-inverting frequency response,
see Figure 1 and Figure 2 in the typical performance section,
illustrate the performance of the HA5023 in various closed
loop gain configurations. Although the bandwidth depen-
dency on closed loop gain isn’t as severe as that of a voltage
feedback amplifier, there can be an appreciable decrease in
bandwidth at higher gains. This decrease may be minimized
by taking advantage of the current feedback amplifier’s
unique relationship between bandwidth and R
F
. All current
feedback amplifiers require a feedback resistor, even for
unity gain applications, and R
F
, in conjunction with the inter-
nal compensation capacitor, sets the dominant pole of the
frequency response. Thus, the amplifier’s bandwidth is
inversely proportional to R
F
. The HA5023 design is opti-
mized for a 1000
R
F
at a gain of +1. Decreasing R
F
in a
unity gain application decreases stability, resulting in exces-
sive peaking and overshoot. At higher gains the amplifier is
more stable, so R
F
can be decreased in a trade-off of stabil-
ity for bandwidth.
The table below lists recommended R
F
values for various
gains, and the expected bandwidth.
PC Board Layout
The frequency response of this amplifier depends greatly on
the amount of care taken in designing the PC board. The
use of low inductance components such as chip resistors
and chip capacitors is strongly recommended. If leaded
components are used the leads must be kept short espe-
cially for the power supply decoupling components and
those components connected to the inverting input.
Attention must be given to decoupling the power supplies. A
large value (10
μ
F) tantalum or electrolytic capacitor in paral-
lel with a small value (0.1
μ
F) chip capacitor works well in
most cases.
A ground plane is strongly recommended to control noise.
Care must also be taken to minimize the capacitance to
ground seen by the amplifier’s inverting input (-IN). The
larger this capacitance, the worse the gain peaking, resulting
in pulse overshoot and possible instability. It is recom-
mended that the ground plane be removed under traces
connected to -IN, and that connections to -IN be kept as
short as possible to minimize the capacitance from this node
to ground.
Driving Capacitive Loads
Capacitive loads will degrade the amplifier’s phase margin
resulting in frequency response peaking and possible oscilla-
tions. In most cases the oscillation can be avoided by placing
an isolation resistor (R) in series with the output as shown in
Figure 34.
FIGURE 34. PLACEMENT OF THE OUTPUT ISOLATION
RESISTOR, R
The selection criteria for the isolation resistor is highly
dependent on the load, but 27
has been determined to be
a good starting value.
Power Dissipation Considerations
Due to the high supply current inherent in dual amplifiers, care
must be taken to insure that the maximum junction tempera-
ture (T
J
,
see Absolute Maximum Ratings) is not exceeded.
Figure 35 shows the maximum ambient temperature versus
supply voltage for the available package styles. It is recom-
mended that thermal calculations, which take into account
output power, be performed by the designer.
FIGURE 35. MAXIMUM OPERATING AMBIENT TEMPERATURE
vs SUPPLY VOLTAGE
GAIN
(A
CL
)
-1
R
F
(
)
750
BANDWIDTH
(MHz)
100
+1
1000
125
+2
681
95
+5
1000
52
+10
383
65
-10
750
22
V
IN
V
OUT
C
L
R
T
+
-
R
I
R
F
R
5
7
9
11
13
15
165
155
145
135
SUPPLY VOLTAGE (V)
CERDIP
M
o
C
125
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HA5023IB | COVER AND RETAINER, 8WAY; For use with:J Connectors; Material:High Impact Thermoplastic; Connector shell size:8; Colour:Grey; Connector type:Backshell; Ways, No. of:8 RoHS Compliant: Yes |
| HA5023EVAL | Dual 125MHz Video Current Feedback Amplifier |
| HA5024 | Quad 125MHz Video Current Feedback Amplifier with Disable |
| HA5024IB | Quad 125MHz Video Current Feedback Amplifier with Disable |
| HA5024IP | Quad 125MHz Video Current Feedback Amplifier with Disable |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA5023IPZ | 功能描述:視頻放大器 W/ANNEAL OPAMP 2X 12 5MHZ CFB IND 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 |
| HA5023MJ/883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual 125MHz Video Current Feedback Amplifier |
| HA5024 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad 125MHz Video Current Feedback Amplifier with Disable |
| HA5024_06 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad 125MHz Video Current Feedback Amplifier with Disable |
| HA5024EVAL | 功能描述:EVALUATION PLATFORM FOR HA5024 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
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