ISL24003IRZ-T7 Intersil, ISL24003IRZ-T7 Datasheet - Page 8

• Manufacturer Part Number: ISL24003IRZ-T7
• Description: IC BUFFER 18CH VCOM DRVR 44-QFN
• Manufacturer: Intersil

Specifications of ISL24003IRZ-T7

• Applications: TFT-LCD Panels: Gamma Buffer, VCOM Driver
• Output Type: Rail-to-Rail
• Number Of Circuits: 18
• -3db Bandwidth: 10MHz
• Slew Rate: 9 V/µs
• Current - Supply: 11.5mA
• Current - Output / Channel: 130mA
• Voltage - Supply, Single/dual (±): 4.5 V ~ 16.5 V, ±2.25 V ~ 8.25 V
• Mounting Type: Surface Mount
• Package / Case: 44-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Description of Operation and Application
Information
Product Description
The ISL24003 are fabricated using a high voltage CMOS
process. They exhibit rail to rail input and output capability
and have very low power consumption. When driving a load
of 10K and 12pF, the buffers have a -3dB bandwidth of
10MHz and exhibit 9V/µs slew rate. The V
a -3dB bandwidth of 12MHz and exhibit 10V/µs slew rate.
Input, Output, and Supply Voltage Range
The ISL24003 are specified with a single nominal supply
voltage from 5V to 15V or a split supply with its total range
from 5V to 15V. Correct operation is guaranteed for a supply
range from 4.5V to 16.5V.
The input common-mode voltage range of the ISL24003
within 500mV beyond the supply rails. The output swings of
the buffers and V
100mV of the positive and negative supply rails with load
currents of 5mA. Decreasing load currents will extend the
output voltage even closer to each supply rails.
Output Phase Reversal
The ISL24003 are immune to phase reversal as long as the
input voltage is limited from V
Although the device's output will not change phase, the
input's over-voltage should be avoided. If an input voltage
exceeds supply voltage by more than 0.6V, electrostatic
protection diode placed in the input stage of the device begin
to conduct and over-voltage damage could occur.
Output Drive Capability
The ISL24003 do not have internal short-circuit protection
circuitry. The buffers will limit the short circuit current to
120mA and the V
current to 150mA if the outputs are directly shorted to the
positive or the negative supply. If the output is shorted
indefinitely, the power dissipation could easily increase such
that the part will be destroyed. Maximum reliability is
maintained if the output continuous current never exceeds
10mA for the buffers and 60mA for the V
These limits are set by the design of the internal metal
interconnections.
The Unused Buffers
It is recommended that any unused buffers should have their
inputs tied to ground plane.
Power Dissipation
With the high-output drive capability of the ISL24003, it is
possible to exceed the 125°C “absolute-maximum junction
temperature” under certain load current conditions.
Therefore, it is important to calculate the maximum junction
temperature for the application to determine if load
COM
COM
amplifier typically extend to within
amplifier will limit the short circuit
S
8
- -0.5V to V
COM
COM
S
+ +0.5V.
amplifier.
amplifier has
ISL24003
conditions need to be modified for the buffer to remain in the
safe operating area.
The maximum power dissipation allowed in a package is
determined according to:
where:
• T
• T
• θ
• P
The maximum power dissipation actually produced by an IC
is the total quiescent supply current times the total power
supply voltage, plus the power in the IC due to the loads, or:
P
(
when sourcing, and:
P
(
when sinking.
where:
• i = 1 to total number of buffers
• V
• I
• V
• V
• I
• I
If we set the two P
can solve for the R
package power dissipation curves provide a convenient way
to see if the device will overheat. The maximum safe power
dissipation can be found graphically, based on the package
type and the ambient temperature. By using the previous
equation, it is a simple matter to see if P
device's power derating curves.
P
V
V
DMAX
DMAX
DMAX
S
OUT
SMAX
LOAD
LA
JA
AMAX
+
JMAX
DMAX
S
OUT
OUT
–
= Total supply voltage of buffer and V
= Load current of V
= Thermal resistance of the package
–
V
=
=
=
i = Maximum output voltage of the application
OUT
V
i = Load current of buffer
= Maximum output voltage of V
= Total quiescent current
= Maximum junction temperature
= Maximum ambient temperature
S
V
V
T
-------------------------------------------- -
= Maximum power dissipation in the package
- )
JMAX
S
S
)
×
×
×
×
I
I
I
I
S
S
LA
Θ
LA
+
+
- T
JA
DMAX
Σi
Σi
LOAD
AMAX
×
×
( [
[
(
V
V
's to avoid device overheat. The
equations equal to each other, we
COM
S
OUT
+
–
i
V
–
OUT
V
S
- )
i )
×
×
I
I
LOAD
COM
DMAX
LOAD
COM
i ]
i ]
exceeds the
+
+
December 7, 2005
FN6118.0