clc1005iso8x Cadeka Microcircuits LLC., clc1005iso8x Datasheet - Page 13

• Manufacturer Part Number: clc1005iso8x
• Description: Low Cost, +2.7v To 5.5v, 260mhz Rail-to-rail Amplifers
• Manufacturer: Cadeka Microcircuits LLC.

Data Sheet
Overdrive Recovery
For an amplifier, an overdrive condition occurs when the
output and/or input ranges are exceeded. The recovery
time varies based on whether the input or output is over-
driven and by how much the ranges are exceeded. The
CLC1005, CLC1015, and CLC2005 will typically recover
in less than 20ns from an overdrive condition. Figure 6
shows the CLC2005 in an overdriven condition.
Enable/Disable Function (CLC1015)
The CLC1015 offers an active-low disable pin that can be
used to lower its supply current. Leave the pin floating to
enable the part. Pull the disable pin to the negative supply
(which is ground in a single supply application) to disable
the output. During the disable condition, the nominal
supply current will drop to below 127μA and the output
will be at high impedance with about 2pF capacitance.
©2004-2009 CADEKA Microcircuits LLC
Figure 5: Frequency Response vs. R
1
Figure 6: Overdrive Recovery
G = 2
R
V
L
s
= +5V
= 2kΩ
Input
Frequency (MHz)
Time (20ns/div)
10
R
f
= 2kΩ
R
f
= 1kΩ
Output
R
V
G = 5
R
L
in
f
100
= 1kΩ
= 2kΩ
=2V
pp
f
Power Dissipation
Power dissipation should not be a factor when operating
under the stated 2kΩ load condition. However, applications
with low impedance, DC coupled loads should be analyzed
to ensure that maximum allowed junction temperature
is not exceeded. Guidelines listed below can be used to
verify that the particular application will not cause the
device to operate beyond it’s intended operating range.
Maximum power levels are set by the absolute maximum
junction rating of 150°C. To calculate the junction
temperature, the package thermal resistance value
Theta
dissipation.
Where T
In order to determine P
needs to be subtracted from the total power delivered by
the supplies.
Supply power is calculated by the standard power
equation.
Power delivered to a purely resistive load is:
The effective load resistor (Rload
the effect of the feedback network. For instance,
Rload
These measurements are basic and are relatively easy to
perform with standard lab equipment. For design purposes
however, prior knowledge of actual signal levels and load
impedance is needed to determine the dissipated power.
Here, P
Quiescent power can be derived from the specified I
values along with known supply voltage, V
power can be calculated as above with the desired signal
amplitudes using:
eff
JA
D
Ambient
in Figure 3 would be calculated as:
(Ө
can be found from
JA
P
T
) is used along with the total die power
D
Junction
P
is the temperature of the working environment.
P
load
= P
supply
Quiescent
= ((V
P
V
D
supply
= T
= V
R
= P
L
D
, the power dissipated in the load
|| (R
LOAD
Ambient
supply
supply
= V
+ P
)
f
RMS
S+
+ R
× I
Dynamic
- P
+ (Ө
- V
2
eff
RMS supply
)/Rload
g
load
)
) will need to include
S-
JA
- P
× P
www.cadeka.com
eff
Load
D
)
Supply
. Load
13
S