se5230 ON Semiconductor, se5230 Datasheet - Page 8

• Manufacturer Part Number: se5230
• Description: Low Voltage Operational Amplifier
• Manufacturer: ON Semiconductor

THERMAL CONSIDERATIONS
capabilities of each package should be considered.
ON Semiconductor does not recommend operation at die
temperatures above 110°C in the SO package because of its
inherently smaller package mass. Die temperatures of
150°C can be tolerated in all the other packages. With this
in mind, the following equation can be used to estimate the
die temperature:
Where
methods of mounting.
typical supply current is 1.1 mA (1.6 mA max). For
operation at supply voltages other than the maximum, see
the data sheet for I
is somewhat proportional to temperature and varies no more
than 100 mA between 25°C and either temperature extreme.
recommended is possible but will result in lower Mean Time
Between Failures (MTBF). This should be considered
before operating beyond recommended die temperature
because of the overall reliability degradation.
DESIGN TECHNIQUES AND APPLICATIONS
engineer to design into any type of system. The supply
current adjust pin (Pin 5) can be left open or tied through a
pot or fixed resistor to the most negative supply (i.e., ground
for single supply or to the negative supply for split supplies).
The minimum supply current is achieved by leaving this pin
open. In this state it will also decrease the bandwidth and
slew rate. When tied directly to the most negative supply, the
device has full bandwidth, slew rate and I
programming of the currentïcontrol pin depends on the
tradeïoffs which can be made in the designer’s application.
The graphs in Figures 3 and 4 will help by showing
bandwidth versus I
be varied anywhere over the range of 100 mA to 600 mA for
a supply voltage of 1.8 V. An external resistor can be
inserted between the current control pin and the most
When using the NE5230, the internal power dissipation
See the packaging section for information regarding other
The maximum supply voltage for the part is 15 V and the
Operation at higher junction temperatures than that
The NE5230 is a very userïfriendly amplifier for an
T
T
P
q
q
amb
D
JA
JA
j
ï 100°C/W for the plastic DIP.
= Ambient Temperature
= Die Temperature
= Power Dissipation
= (I
= Package Thermal Resistance
= 270°C/W for SOï8 in PC Board Mounting
CC
T j + T amb ) (P D
CC
x V
CC
versus V
. As can be seen, the supply current can
CC
)
CC
curves. The supply current
q JA )
NE5230, SA5230, SE5230
CC
http://onsemi.com
(eq. 1)
. The
8
negative supply. The resistor can be selected between 1.0 W
to 100 kW to provide any required supply current over the
indicated range. In addition, a small varying voltage on the
bias current control pin could be used for such exotic things
as changing the gainïbandwidth for voltage controlled low
pass filters or amplitude modulation. Furthermore, control
over the slew rate and the rise time of the amplifier can be
obtained in the same manner. This control over the slew rate
also changes the settling time and overshoot in pulse
response applications. The settling time to 0.1% changes
from 5.0 ms at low bias to 2.0 ms at high bias. The supply
current control can also be utilized for waveïshaping
applications such as for pulse or triangular waveforms. The
gainïbandwidth can be varied from between 250 kHz at low
bias to 600 kHz at high bias current. The slew rate range is
0.08 V/ms at low bias and 0.25 V/ms at high bias.
Figure 3. Unity Gain Bandwidth vs. Power Supply
Figure 4. I
800
700
600
500
400
300
200
100
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
100
10
Resistor for Several Supply Voltages
0
V
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
CC
CC
ï 15V
ï 12V
ï 9V
ï 6V
ï 3V
ï 2V
ï 1.8V
10
Current for V
Current vs. Bias Current Adjusting
UNITY GAIN BANDWIDTH (kHz)
1
200
10
R
2
ADJ
CC
(W)
300
T
A
10
= ±0.9 V
ï 25°C
3
400 500 600700
10
4
10
5