6
FN2921.11
March 8, 2006
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.
Short Circuit Protection
The output current can be limited by using the following circuit:
OUTMAX
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 C
LOAD
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.
OUT
IN
V+
R
LIM
V
2
+
R
LIM
V
1
-
V
2
-
V
1
+
V-
I
OUTMAX
= 200mA
(CONTINUOUS)
R
LIM
-------------------------
OUTMAX
-------------------------
=
=
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
25
45
65
85
105
125
TEMPERATURE (°C)
M
SOIC
PDIP
PLCC
QUIESCENT POWER DISSIPATION
AT
±
15V SUPPLIES
Where: T
JMAX
= Maximum Junction Temperature of the
Device
T
A
= Ambient
θ
JC
= Junction to Case Thermal Resistance
θ
CS
= Case to Heat Sink Thermal Resistance
θ
SA
= Heat Sink to Ambient Thermal Resistance
Graph is based on:
P
DMAX
T
JC
T
SA
–
CS
+
------------+
=
P
DMAX
T
-------------------------------
T
A
–
JA
=
FIGURE 2. MAXIMUM POWER DISSIPATION vs TEMPERATURE
CAN
HA-5002