HA-5002-9 查看數據表（PDF） - Renesas Electronics
零件编号
产品描述 (功能)
生产厂家
HA-5002-9 Datasheet PDF : 12 Pages
| |||
HA-5002
Schematic Diagram
V1+
R9
Q25
R10
Q9
Q10
R5
Q21
Q11
Q15
Q23
R7
R8
Q26 Q20
Q27
Q19
Q18
R4
Q3
RN1
R1
V2+
Q12
Q1
Q6
IN
Q7 Q4
Q22
Q24
Q8
Q17 R6
Q16
Q14
R11
RN2
Q5
OUT
Q2
V2-
Q13
R12 R3
R2
RN3
Application Information
Layout Considerations
The wide bandwidth of the HA-5002 necessitates that high
frequency circuit layout procedures be followed. Failure to
follow these guidelines can result in marginal performance.
Probably the most crucial of the RF/video layout rules is the
use of a ground plane. A ground plane provides isolation and
minimizes distributed circuit capacitance and inductance which
will degrade high frequency performance.
Other considerations are proper power supply bypassing and
keeping the input and output connections as short as possible
which minimizes distributed capacitance and reduces board
space.
Power Supply Decoupling
For optimal device performance, it is recommended that the
positive and negative power supplies be bypassed with
capacitors to ground. Ceramic capacitors ranging in value from
0.01 to 0.1F will minimize high frequency variations in supply
voltage, while low frequency bypassing requires larger valued
capacitors since the impedance of the capacitor is dependent
on frequency.
It is also recommended that the bypass capacitors be
connected close to the HA-5002 (preferably directly to the
supply pins).
Operation at Reduced Supply Levels
The HA-5002 can operate at supply voltage levels as low as
5V and lower. Output swing is directly affected as well as
slight reductions in slew rate and bandwidth.
V1-
Short Circuit Protection
The output current can be limited by using the following circuit:
RLIM
=
----------V----+-----------
IOUTMAX
=
-----------V---------------
IOUTMAX
V+ IOUTMAX = 200mA
(CONTINUOUS)
V1+
IN
V1-
RLIM
V2+
OUT
V2-
RLIM
V-
Capacitive Loading
The HA-5002 will drive large capacitive loads without oscillation
but peak current limits should not be exceeded. Following the
formula I = Cdv/dt implies that the slew rate or the capacitive load
must be controlled to keep peak current below the maximum or
use the current limiting approach as shown. The HA-5002 can
become unstable with small capacitive loads (50pF) if certain
precautions are not taken. Stability is enhanced by any one of the
following: a source resistance in series with the input of 50 to
1k; increasing capacitive load to 150pF or greater; decreasing
CLOAD to 20pF or less; adding an output resistor of 10 to 50;
or adding feedback capacitance of 50pF or greater. Adding
source resistance generally yields the best results.
FN2921 Rev 12.00
October 18, 2013
Page 5 of 12
Share Link: 