参数资料
| 型号： | HFA1412IP |
| 厂商： | Intersil |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC BUFFER QUAD 350MHZ LP 14-DIP |
| 标准包装： | 25 |
| 放大器类型： | 缓冲器 |
| 电路数： | 4 |
| 转换速率： | 1700 V/µs |
| -3db带宽： | 350MHz |
| 电流 - 输入偏压： | 1µA |
| 电压 - 输入偏移： | 2000µV |
| 电流 - 电源： | 5.9mA |
| 电流 - 输出 / 通道： | 55mA |
| 电压 - 电源，单路/双路(±)： | 9 V ~ 11 V，±4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 14-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 14-PDIP |
| 包装： | 管件 |
6
FN4152.4
January 23, 2006
PC Board Layout
This amplifier’s frequency response depends greatly on the
care taken in designing the PC board (PCB). The use of low
inductance components such as chip resistors and chip
capacitors is strongly recommended, while a solid
ground plane is a must!
Attention should be given to decoupling the power supplies.
A large value (10
F) tantalum in parallel with a small value
(0.1
F) chip capacitor works well in most cases.
Terminated microstrip signal lines are recommended at the
input and output of the device. Capacitance directly on the
output must be minimized, or isolated as discussed in the
next section.
An example of a good high frequency layout is the
Evaluation Board shown in Figure 3.
Driving Capacitive Loads
Capacitive loads, such as an A/D input, or an improperly
terminated transmission line will degrade the amplifier’s
phase margin resulting in frequency response peaking and
possible oscillations. In most cases, the oscillation can be
avoided by placing a resistor (RS) in series with the output
prior to the capacitance.
Figure 1 details starting points for the selection of this
resistor. The points on the curve indicate the RS and CL
combinations for the optimum bandwidth, stability, and
settling time, but experimental fine tuning is recommended.
Picking a point above or to the right of the curve yields an
overdamped response, while points below or left of the curve
indicate areas of underdamped performance.
RS and CL form a low pass network at the output, thus limiting
system bandwidth well below the amplifier bandwidth of
350MHz. By decreasing RS as CL increases (as illustrated in
the curves), the maximum bandwidth is obtained without
sacrificing stability. In spite of this, bandwidth decreases as
the load capacitance increases. For example, at AV =+2,
RS =22, CL = 100pF, the overall bandwidth is 125MHz, and
bandwidth drops to 100MHz at RS =12, CL = 220pF.
Evaluation Board
The performance of the HFA1412 may be evaluated using
the HA5025 Evaluation Board, slightly modified as follows:
1. Remove the four feedback resistors, and leave the
connections open.
2. a. For AV = +1 evaluation, remove the gain setting
resistors (R1), and leave pins 2, 6, 9, and 13 floating.
b. For AV = +2, replace the gain setting resistors (R1) with
0
resistors to GND.
3. Replace the 0
series output resistors with 50.
The modified schematic for amplifier 1, and the board layout
are shown in Figures 2 and 3.
To order evaluation boards (part number HA5025EVAL),
please contact your local sales office.
0
100
200
300
400
0
10
20
30
40
50
LOAD CAPACITANCE (pF)
SERI
ES
OUTP
U
T
RESI
ST
AN
CE
(
)
AV =+1
AV =+2
150
250
350
50
FIGURE 1. RECOMMENDED SERIES RESISTOR vs LOAD
CAPACITANCE
+5V
10
F0.1F
50
GND
R1
-5V
0.1
F
10
F
50
IN
OUT
∞ (AV = +1)
or 0
(A
V = +2)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NOTE: R1 =
FIGURE 2. MODIFIED EVALUATION BOARD SCHEMATIC
+
-
(NOTE)
FIGURE 3A. TOP LAYOUT
FIGURE 3B. BOTTOM LAYOUT
FIGURE 3. EVALUATION BOARD LAYOUT
HFA1412
相关PDF资料 |
PDF描述 |
|---|---|
| HS18 | HEATSINK 12P PDIP |
| HSP-3 | THERMAL PAD TRIPLE PHASE |
| HSP-5 | THERMAL PAD 3-PHASE W/ADHESIVE |
| ICL7612BCPAZ | IC OPAMP LOW PWR 1.4MHZ 8-DIP |
| ICL7614ACPA+ | IC OPAMP LP CMOS 8-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HFA1412IPZ | 功能描述:特殊用途放大器 W/ANL BUFR 4X 350MHZ PRG GAIN IND RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| HFA1412MJ/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HFA150066-0A0 | 制造商:Laird Technologies Inc 功能描述:SPLIT CORE FOR ROUND CABLE W/WHITE CASE,BULK - Bulk 制造商:Laird Technologies Inc 功能描述:FERRITE CORE 6.6MM 350R 50 制造商:LAIRD TECHNOLOGIES / STEWARD 功能描述:HFA150066-0A0 - Pro Line: S200 |
| HFA150066-0A2 | 功能描述:EMI/RFI 抑制器及铁氧体 274ohms 300MHz 7.05mm Inside Slot RoHS:否 制造商:Fair-Rite 产品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流电流: 最大直流电阻: 工作温度范围:- 55 C to + 125 C 封装 / 箱体: 端接类型:SMD/SMT |
| HFA150068-0A2 | 功能描述:EMI/RFI 抑制器及铁氧体 275ohms 300MHz 8.13mm Inside Slot RoHS:否 制造商:Fair-Rite 产品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流电流: 最大直流电阻: 工作温度范围:- 55 C to + 125 C 封装 / 箱体: 端接类型:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。