ISL24003

® ISL24003 Data Sheet December 7, 2005 FN6118.0 Multi-Channel Buffers Plus VCOM Driver 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. 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. Features • 18-channel gamma buffers - 9 channels swing to the upper supply - 9 channels swing to the lower supply - 10mA continous output current • Single VCOM amplifier - 180mA short circuit output current - 35MHz -3dB Bandwidth - 70V/µs slew rate • Low supply current • Pb-free plus anneal available (RoHS compliant) Ordering Information PART NUMBER ISL24003IRZ (Note) ISL24003IRZ-T7 (Note) PART MARKING ISL24003IRZ TAPE & REEL PACKAGE PKG DWG. # Applications • TFT-LCD monitors • LCD televisions • Industrial flat panel displays MDP0046 44 Ld 7x7mm QFN (Pb-free) MDP0046 44 Ld 7x7mm QFN (Pb-free) Pinout ISL24003 (44 LD 7X7MM QFN) TOP VIEW ISL24003IRZ 7” 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. 44 OUT5 43 OUT4 42 OUT3 41 OUT2 40 OUT1 39 VS+ 37 IN1 36 IN2 35 IN3 OUT6 1 OUT7 2 OUT8 3 OUT9 4 VS- 5 VS+ 6 OUT10 7 OUT11 8 OUT12 9 OUT13 10 OUT14 11 OUT15 12 OUT16 13 OUT17 14 OUT18 15 INNCOM 16 OUTCOM 17 VS- 18 INPCOM 19 IN18 20 IN17 21 IN16 22 THERMAL PAD 34 IN4 33 IN5 32 IN6 31 IN7 30 IN8 29 IN9 28 IN10 27 IN11 26 IN12 25 IN13 24 IN14 23 IN15 1 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. 38 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 INPUT CHARACTERISTICS (REFERENCE BUFFERS) VOS TCVOS IB RIN CIN AV CMIR Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance Voltage Gain Input Voltage Range 1V ≤ VOUT ≤ 14V IN1 to IN9 IN10 to IN18 INPUT CHARACTERISTICS (VCOM BUFFER) VOS TCVOS IB RIN CIN VREG CMIRCOM AVOL CMRR Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance Load Regulation Input Voltage Range VCOM Open Loop Gain Common Mode Rejection Ratio RL = 1kΩ VCOM = 7.5V, -60mA < IL < 60mA -25 0 55 50 70 65 VCM = 7.5V (Note 1) VCM = 7.5V 1 3 2 10 1.35 +20 VS+ 50 15 mV µV/°C nA MΩ pF mV V dB dB 0.992 1.5 0 VCM = 0V (Note 1) VCM = 0V 2 5 2 10 1.35 1.008 VS+ VS+ -1.5 50 20 mV µV/°C nA MΩ pF V/V V V OUTPUT CHARACTERISTICS (REFERENCE BUFFERS) VOH High Output Voltage - (Output 1-2) High Output Voltage - (Output 3-9) High Output Voltage - (Output 10-18) VOL Low Output Voltage - (Output 1-9) Low Output Voltage - (Output 10-16) Low Output Voltage - (Output 17-18) ISC Short Circuit Current 100 VIN = 13.5V, IO = 5mA VIN = 1.5V, IO = 5mA VIN = 0V, IO = 5mA VIN = 15V, IO = 5mA 14.85 14.8 13.45 14.9 14.85 13.5 1.5 150 100 130 1.55 200 150 V mV mV mA V V OUTPUT CHARACTERISTICS (VCOM BUFFER) VOH VOL ISC High Level Saturated Output Voltage Low Level Saturated Output Voltage Short Circuit Current VS+ = 15V, IO = -5mA, VI = 15V VS+ = 15V, IO = -5mA, VI = 0V 150 14.85 14.9 0.1 180 0.15 V V mA 2 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 POWER SUPPLY PERFORMANCE PSRR Power Supply Rejection Ratio Reference buffer VS from 5V to 15V VCOM buffer, VS from 5V to 15V IS Total Supply Current 50 55 8.0 80 80 11.5 15.5 dB dB mA DYNAMIC PERFORMANCE (BUFFER AMPLIFIERS) SR tS BW CS Slew Rate (Note 2) Settling to +0.1% (AV = +1) -3dB Bandwidth Channel Separation (AV = +1), VO = 2V step RL = 10kΩ, CL = 10pF 4.5 9 500 10 70 V/µs ns MHz dB ISL24003 DYNAMIC PERFORMANCE (VCOM AMPLIFIERS) SR tS BW CS NOTES: 1. Measured over operating temperature range. 2. Slew rate is measured on rising and falling edges. Slew Rate (Note 2) Settling to +0.1% (AV = +1) -3dB Bandwidth Channel Separation -4V ≤ VOUT ≤ 4V, 20% to 80% (AV = +1), VO = 2V step RL = 10kΩ, CL = 10pF 50 70 350 35 70 V/µs ns MHz dB 3 FN6118.0 December 7, 2005 ISL24003 Pin Descriptions PIN NAME 6, 39 40-44, 1-4 7-15 16 17 5,18 19 20-28 29-37 38 ISL24003 VS+ OUT1-9 OUT10-18 INNCOM OUTCOM VSINPCOM IN10-18 IN1-9 NC Positive supply voltage Output gamma channel 1-9 Output gamma channel 10-18 Negative Input VCOM Output, VCOM Negative supply voltage Positive Input VCOM Input gamma channel 10-18 Input gamma channel 1-9 No connect PIN FUNCTION 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 RL=10kΩ VS=±7.5V RL=10kΩ CL=100pF CL=47pF RL=1kΩ RL=562Ω RL=150Ω CL=12pF FIGURE 1. FREQUENCY RESPONSE FOR VARIOUS RLOAD (BUFFER) FIGURE 2. FREQUENCY RESPONSE FOR VARIOUS CLOAD (BUFFER) VS=±7.5V RL=10kΩ CL=8pF VOUT VS=±7.5V RL=10kΩ CL=8pF VIN 2V/DIV 50mV/DIV VIN VOUT 1µs/DIV 100ns/DIV FIGURE 3. LARGE SIGNAL TRANSIENT RESPONSE (BUFFER) FIGURE 4. SMALL SIGNAL TRANSIENT RESPONSE (BUFFER) 20 VS=±7.5V VOLTAGE NOISE (nV/√Hz) VS=±7.5V RL=1kΩ 0 CL=1.5pF PSRR (dB) 100 -20 PSRR+ -40 PSRR- 10 -60 10K 100K 1M FREQUENCY (Hz) 10M 100M -80 1K 10K 100K FREQUENCY (Hz) 1M 10M FIGURE 5. INPUT NOISE SPECIAL DENSITY vs FREQUENCY (BUFFER) FIGURE 6. PSRR vs FREQUENCY (BUFFER) 5 FN6118.0 December 7, 2005 ISL24003 Typical Performance Curves VS=±7.5V RL=10kΩ VOPP=1V (Continued) -20 VS=±7.5V RL=1kΩ 0 CL=1.5pF Channel 1-9 PSRR (dB) -20 PSRR+ -40 PSRR-60 Channel 10-18 -80 1K 10K 100K FREQUENCY (Hz) 1M 10M FIGURE 7. OVERSHOOT vs CAPACITANCE LOAD (BUFFER) FIGURE 8. PSRR vs FREQUENCY (VCOM) VS=±7.5V RL=10kΩ CL=100pF CL=47pF VS=±7.5V CL=10pF RL=10kΩ RL=1kΩ CL=12pF RL=562Ω RL=150Ω FIGURE 9. FREQUENCY RESPONSE FOR VARIOUS CLOAD (VCOM) FIGURE 10. FREQUENCY RESPONSE FOR VARIOUS RLOAD (VCOM) VS=±7.5V RL=10kΩ CL=8pF VOUT VS=±7.5V RL=10kΩ CL=8pF VIN 2V/DIV 50mV/DIV VIN VOUT 1µs/DIV 100ns/DIV FIGURE 11. LARGE SIGNAL TRANSIENT RESPONSE (VCOM) FIGURE 12. SMALL SIGNAL TRANSIENT RESPONSE (VCOM) 6 FN6118.0 December 7, 2005 ISL24003 Typical Performance Curves VS=±7.5V RL=10kΩ VOPP=1V (Continued) VS=±7.5V VOLTAGE NOISE (nV/√Hz) 100 10 10k 100k 1M FREQUENCY (Hz) 10M 100M FIGURE 13. OVERSHOOT vs CAPACITANCE LOAD (VCOM) FIGURE 14. INPUT NOISE SPECIAL DENSITY vs FREQUENCY (VCOM) 1k OUTPUT IMPEDANCE (Ω) VS=±7.5V RL=1kΩ 100 VS=±5V BUFFER VCOM 10 BUFFER 1 VCOM BUFFER BUFFER 0 1k 10k 100k FREQUENCY (Hz) 1M 10M FIGURE 15. CHANNEL SEPARATION FIGURE 16. OUTPUT IMPEDANCE vs FREQUENCY 7 FN6118.0 December 7, 2005 ISL24003 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 VCOM amplifier has a -3dB bandwidth of 12MHz and exhibit 10V/µs slew rate. 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: 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 + Σ i × [ ( V S + – V OUT i ) × I LOAD i ] + ( V S + – V OUT ) × I LA 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. 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. when sourcing, and: P DMAX = V S × I S + Σ i × [ ( V OUT i – V S - ) × I LOAD i ] + ( V OUT – V S - ) × I LA when sinking. where: • i = 1 to total number of buffers • VS = Total supply voltage of buffer and VCOM • ISMAX = Total quiescent current • 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. 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 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. 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 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 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