DATASHEET

ISL24003
®
Data Sheet
December 7, 2005
FN6118.0
Multi-Channel Buffers Plus VCOM Driver
Features
The ISL24003 integrates eighteen gamma buffers and a
single VCOM buffer for use in large panel LCD displays of
10” and greater. Half of the gamma channels in each device
are designed to swing to the upper supply rail, with the other
half designed to swing to the lower rail. The output capability
of each channel is 10mA continuous, with 120mA peak. The
gamma buffers feature a 10MHz 3dB bandwidth
specification and a 9V/µs slew rate.
• 18-channel gamma buffers
- 9 channels swing to the upper supply
- 9 channels swing to the lower supply
- 10mA continous output current
The VCOM amplifier is designed to swing from rail to rail. The
output current capability of the VCOM in the ISL24003 is
60mA continuous, 150mA peak, and a slew rate of 50V/µs.
Ordering Information
• Low supply current
• Pb-free plus anneal available (RoHS compliant)
Applications
ISL24003
(44 LD 7X7MM QFN)
TOP VIEW
34 IN4
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
Pinout
35 IN3
MDP0046
44 Ld
7x7mm QFN
(Pb-free)
36 IN2
7”
• Industrial flat panel displays
37 IN1
ISL24003IRZ
• LCD televisions
38
ISL24003IRZ-T7
(Note)
PACKAGE
39 VS+
MDP0046
44 Ld
7x7mm QFN
(Pb-free)
40 OUT1
-
41 OUT2
ISL24003IRZ
• TFT-LCD monitors
42 OUT3
ISL24003IRZ
(Note)
PKG
DWG. #
43 OUT4
TAPE
&
REEL
44 OUT5
PART
MARKING
OUT6 1
33 IN5
OUT7 2
32 IN6
OUT8 3
31 IN7
OUT9 4
30 IN8
VS- 5
29 IN9
THERMAL
PAD
VS+ 6
IN16 22
IN17 21
23 IN15
IN18 20
24 IN14
OUT14 11
INPCOM 19
OUT13 10
VS- 18
25 IN13
OUTCOM 17
OUT12 9
INNCOM 16
26 IN12
OUT18 15
OUT11 8
OUT17 14
27 IN11
OUT15 12
1
28 IN10
OUT10 7
OUT16 13
PART NUMBER
• Single VCOM amplifier
- 180mA short circuit output current
- 35MHz -3dB Bandwidth
- 70V/µs slew rate
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL24003
Absolute Maximum Ratings (TA = 25°C)
Supply Voltage between VS+ and VS- . . . . . . . . . . . . . . . . . . . .+18V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . VS- -0.5V, VS+ +0.5V
Maximum Continuous Output Current (VOUT1-18) . . . . . . . . . 10mA
Maximum Continuous Output Current (VOUTA). . . . . . . . . . . . 60mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
PARAMETER
VS+ = +15V, VS- = 0, RL = 10kΩ, CL = 10pF to 0V, TA = 25°C unless otherwise specified
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
20
mV
INPUT CHARACTERISTICS (REFERENCE BUFFERS)
VOS
Input Offset Voltage
VCM = 0V
2
TCVOS
Average Offset Voltage Drift
(Note 1)
5
IB
Input Bias Current
VCM = 0V
2
RIN
Input Impedance
10
MΩ
CIN
Input Capacitance
1.35
pF
AV
Voltage Gain
1V ≤ VOUT ≤ 14V
CMIR
Input Voltage Range
IN1 to IN9
IN10 to IN18
µV/°C
50
nA
0.992
1.008
V/V
1.5
VS+
V
0
VS+
-1.5
V
15
mV
INPUT CHARACTERISTICS (VCOM BUFFER)
VOS
Input Offset Voltage
VCM = 7.5V
1
TCVOS
Average Offset Voltage Drift
(Note 1)
3
IB
Input Bias Current
VCM = 7.5V
2
RIN
Input Impedance
10
MΩ
CIN
Input Capacitance
1.35
pF
VREG
Load Regulation
CMIRCOM
Input Voltage Range VCOM
AVOL
Open Loop Gain
CMRR
Common Mode Rejection Ratio
µV/°C
50
+20
nA
VCOM = 7.5V, -60mA < IL < 60mA
-25
RL = 1kΩ
55
70
dB
50
65
dB
14.85
14.9
V
14.8
14.85
V
13.45
13.5
0
VS+
mV
V
OUTPUT CHARACTERISTICS (REFERENCE BUFFERS)
VOH
High Output Voltage - (Output 1-2)
VIN = 15V, IO = 5mA
High Output Voltage - (Output 3-9)
VOL
High Output Voltage - (Output 10-18)
VIN = 13.5V, IO = 5mA
Low Output Voltage - (Output 1-9)
VIN = 1.5V, IO = 5mA
Low Output Voltage - (Output 10-16)
VIN = 0V, IO = 5mA
1.5
Low Output Voltage - (Output 17-18)
ISC
Short Circuit Current
1.55
V
150
200
mV
100
150
mV
100
130
mA
14.85
14.9
V
OUTPUT CHARACTERISTICS (VCOM BUFFER)
VOH
High Level Saturated Output Voltage
VS+ = 15V, IO = -5mA, VI = 15V
VOL
Low Level Saturated Output Voltage
VS+ = 15V, IO = -5mA, VI = 0V
ISC
Short Circuit Current
2
0.1
150
180
0.15
V
mA
FN6118.0
December 7, 2005
ISL24003
Electrical Specifications
PARAMETER
VS+ = +15V, VS- = 0, RL = 10kΩ, CL = 10pF to 0V, TA = 25°C unless otherwise specified (Continued)
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
Reference buffer VS from 5V to 15V
50
80
dB
VCOM buffer, VS from 5V to 15V
55
80
dB
8.0
11.5
4.5
9
V/µs
POWER SUPPLY PERFORMANCE
PSRR
IS
Power Supply Rejection Ratio
Total Supply Current
15.5
mA
DYNAMIC PERFORMANCE (BUFFER AMPLIFIERS)
SR
Slew Rate (Note 2)
tS
Settling to +0.1% (AV = +1)
(AV = +1), VO = 2V step
500
ns
BW
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
10
MHz
CS
Channel Separation
70
dB
70
V/µs
ISL24003 DYNAMIC PERFORMANCE (VCOM AMPLIFIERS)
SR
Slew Rate (Note 2)
-4V ≤ VOUT ≤ 4V, 20% to 80%
tS
Settling to +0.1% (AV = +1)
(AV = +1), VO = 2V step
350
ns
BW
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
35
MHz
CS
Channel Separation
70
dB
50
NOTES:
1. Measured over operating temperature range.
2. Slew rate is measured on rising and falling edges.
3
FN6118.0
December 7, 2005
ISL24003
Pin Descriptions
PIN NAME
ISL24003
6, 39
VS+
PIN FUNCTION
Positive supply voltage
40-44, 1-4
OUT1-9
7-15
OUT10-18
16
INNCOM
Negative Input VCOM
Output, VCOM
17
OUTCOM
5,18
VS-
Output gamma channel 1-9
Output gamma channel 10-18
Negative supply voltage
19
INPCOM
Positive Input VCOM
20-28
IN10-18
Input gamma channel 10-18
29-37
IN1-9
38
NC
Input gamma channel 1-9
No connect
Block Diagram
VS+
ISL24003
1
COLUMN
DRIVER
18
+
-
VCOM
NOTE: ISL24003 integrates 18 gamma buffers.
4
FN6118.0
December 7, 2005
ISL24003
Typical Performance Curves
VS=±7.5V
CL=10pF
VS=±7.5V
RL=10kΩ
RL=1kΩ
CL=100pF
RL=10kΩ
CL=47pF
CL=12pF
RL=562Ω
RL=150Ω
FIGURE 1. FREQUENCY RESPONSE FOR VARIOUS RLOAD
(BUFFER)
VS=±7.5V
RL=10kΩ
CL=8pF
FIGURE 2. FREQUENCY RESPONSE FOR VARIOUS CLOAD
(BUFFER)
VS=±7.5V
RL=10kΩ
CL=8pF
VOUT
2V/DIV
50mV/DIV
VOUT
VIN
1µs/DIV
100ns/DIV
FIGURE 3. LARGE SIGNAL TRANSIENT RESPONSE
(BUFFER)
FIGURE 4. SMALL SIGNAL TRANSIENT RESPONSE
(BUFFER)
20
VS=±7.5V
VS=±7.5V
RL=1kΩ
0 CL=1.5pF
100
PSRR (dB)
VOLTAGE NOISE (nV/√Hz)
VIN
-20
PSRR+
-40
PSRR-60
10
10K
100K
1M
10M
100M
FREQUENCY (Hz)
FIGURE 5. INPUT NOISE SPECIAL DENSITY vs FREQUENCY
(BUFFER)
5
-80
1K
10K
100K
1M
10M
FREQUENCY (Hz)
FIGURE 6. PSRR vs FREQUENCY (BUFFER)
FN6118.0
December 7, 2005
ISL24003
Typical Performance Curves
(Continued)
-20
VS=±7.5V
RL=1kΩ
0 CL=1.5pF
Channel 1-9
PSRR (dB)
VS=±7.5V
RL=10kΩ
VOPP=1V
Channel 10-18
-20
PSRR+
-40
PSRR-60
-80
1K
10K
100K
1M
10M
FREQUENCY (Hz)
FIGURE 7. OVERSHOOT vs CAPACITANCE LOAD (BUFFER)
VS=±7.5V
RL=10kΩ
FIGURE 8. PSRR vs FREQUENCY (VCOM)
VS=±7.5V
CL=10pF
CL=100pF
CL=47pF
RL=10kΩ
RL=1kΩ
CL=12pF
RL=562Ω
RL=150Ω
FIGURE 9. FREQUENCY RESPONSE FOR VARIOUS CLOAD
(VCOM)
VS=±7.5V
RL=10kΩ
CL=8pF
FIGURE 10. FREQUENCY RESPONSE FOR VARIOUS RLOAD
(VCOM)
VS=±7.5V
RL=10kΩ
CL=8pF
VOUT
2V/DIV
VIN
50mV/DIV
VOUT
VIN
1µs/DIV
FIGURE 11. LARGE SIGNAL TRANSIENT RESPONSE (VCOM)
6
100ns/DIV
FIGURE 12. SMALL SIGNAL TRANSIENT RESPONSE (VCOM)
FN6118.0
December 7, 2005
ISL24003
Typical Performance Curves
(Continued)
VS=±7.5V
VOLTAGE NOISE (nV/√Hz)
VS=±7.5V
RL=10kΩ
VOPP=1V
100
10
10k
100k
1M
10M
100M
FREQUENCY (Hz)
FIGURE 13. OVERSHOOT vs CAPACITANCE LOAD (VCOM)
FIGURE 14. INPUT NOISE SPECIAL DENSITY vs FREQUENCY
(VCOM)
BUFFER <==>
VCOM
BUFFER <==>
BUFFER
OUTPUT IMPEDANCE (Ω)
1k
VS=±7.5V
RL=1kΩ
100
VS=±5V
10
BUFFER
VCOM
1
0
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FIGURE 15. CHANNEL SEPARATION
7
FIGURE 16. OUTPUT IMPEDANCE vs FREQUENCY
FN6118.0
December 7, 2005
ISL24003
Description of Operation and Application
Information
conditions need to be modified for the buffer to remain in the
safe operating area.
Product Description
The maximum power dissipation allowed in a package is
determined according to:
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 VCOM amplifier has
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 VCOM amplifier typically extend to within
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.
T JMAX - T AMAX
P DMAX = -------------------------------------------Θ JA
where:
• TJMAX = Maximum junction temperature
• TAMAX = Maximum ambient temperature
• θJA = Thermal resistance of the package
• PDMAX = Maximum power dissipation in the package
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 DMAX = V S × I S + Σi × [ ( V S + – V OUT i ) × I LOAD i ] +
( V S + – V OUT ) × I LA
when sourcing, and:
Output Phase Reversal
The ISL24003 are immune to phase reversal as long as the
input voltage is limited from VS- -0.5V to VS+ +0.5V.
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.
P DMAX = V S × I S + Σi × [ ( V OUT i – V S - ) × I LOAD i ] +
( V OUT – V S - ) × I LA
Output Drive Capability
• VS = Total supply voltage of buffer and VCOM
The ISL24003 do not have internal short-circuit protection
circuitry. The buffers will limit the short circuit current to
120mA and the VCOM amplifier will limit the short circuit
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 VCOM amplifier.
These limits are set by the design of the internal metal
interconnections.
• ISMAX = Total quiescent current
The Unused Buffers
It is recommended that any unused buffers should have their
inputs tied to ground plane.
Power Dissipation
when sinking.
where:
• i = 1 to total number of buffers
• VOUTi = Maximum output voltage of the application
• VOUT = Maximum output voltage of VCOM
• ILOADi = Load current of buffer
• ILA = Load current of VCOM
If we set the two PDMAX equations equal to each other, we
can solve for the RLOAD's to avoid device overheat. The
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 PDMAX exceeds the
device's power derating curves.
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
8
FN6118.0
December 7, 2005
ISL24003
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high frequency device, good printed circuit
board layout is necessary for optimum performance. Ground
plane construction is highly recommended, lead lengths
should be as short as possible, and the power supply pins
must be well bypassed to reduce the risk of oscillation. For
normal single supply operation, where the VS- pin is
connected to ground, one 0.1µF ceramic capacitor should be
placed from the VS+ pin to ground. A 4.7µF tantalum
capacitor should then be connected from the VS+ pin to
ground. One 4.7µF capacitor may be used for multiple
devices. This same capacitor combination should be placed
at each supply pin to ground if split supplies are to be used.
Important Note: The metal plane used for heat sinking of
the device is electrically connected to the negative
supply potential (VS-). If VS- is tied to ground, the
thermal pad can be connected to ground. Otherwise, the
thermal pad must be isolated from any other power
planes.
9
FN6118.0
December 7, 2005
ISL24003
QFN Package Outline Drawing
NOTE: The package drawing shown here may not be the latest version. To check the latest revision, please refer to the Intersil website at
<http://www.intersil.com/design/packages/index.asp>
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
10
FN6118.0
December 7, 2005
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