ICL7611, ICL7612 Data Sheet October 1999 File Number 2919.5 1.4MHz, Low Power CMOS Operational Amplifiers Features The ICL761X/762X/764X series is a family of monolithic CMOS operational amplifiers. These devices provide the designer with high performance operation at low supply voltages and selectable quiescent currents, and are an ideal design tool when ultra low input current and low power dissipation are desired. * High Input Impedance . . . . . . . . . . . . . . . . . . . . . . 1012 The basic amplifier will operate at supply voltages ranging from 1V to 8V, and may be operated from a single Lithium cell. A unique quiescent current programming pin allows setting of standby current to 1mA, 100A, or 10A, with no external components. This results in power consumption as low as 20W. The output swing ranges to within a few millivolts of the supply voltages. Of particular significance is the extremely low (1pA) input current, input noise current of 0.01pA/Hz, and 1012 input impedance. These features optimize performance in very high source impedance applications. * Wide Operating Voltage Range . . . . . . . . . . . 1V to 8V * Programmable Power Consumption. . . . . . Low as 20W * Input Current Lower Than BIFETs . . . . . . . . . . . 1pA (Typ) * Output Voltage Swing . . . . . . . . . . . . . . . . . . . V+ and V* Input Common Mode Voltage Range Greater Than Supply Rails (ICL7612) Applications * Portable Instruments * Telephone Headsets * Hearing Aid/Microphone Amplifiers * Meter Amplifiers * Medical Instruments * High Impedance Buffers Pinouts The inputs are internally protected. Outputs are fully protected against short circuits to ground or to either supply. ICL7611, ICL7612 (PDIP, SOIC) TOP VIEW AC performance is excellent, with a slew rate of 1.6V/s, and unity gain bandwidth of 1MHz at IQ = 1mA. Because of the low power dissipation, junction temperature rise and drift are quite low. Applications utilizing these features may include stable instruments, extended life designs, or high density packages. BAL 1 -IN 2 - 8 IQ SET 7 V+ + +IN 3 6 OUT V- 4 5 BAL Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. ICL7611BCPA 0 to 70 8 Ld PDIP - B Grade E8.3 ICL7611DCPA 0 to 70 8 Ld PDIP - D Grade E8.3 ICL7611DCBA 0 to 70 8 Ld SOIC - D Grade M8.15 ICL7611DCBA-T 0 to 70 8 Ld SOIC - D Grade Tape and Reel M8.15 ICL7612BCPA 0 to 70 8 Ld PDIP - B Grade E8.3 ICL7612DCPA 0 to 70 8 Ld PDIP - D Grade E8.3 ICL7612DCBA 0 to 70 8 Ld SOIC - D Grade M8.15 ICL7612DCBA-T 0 to 70 8 Ld SOIC - D Grade Tape and Reel M8.15 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Copyright (c) Intersil Corporation 1999 ICL7611, ICL7612 Absolute Maximum Ratings Thermal Information Supply Voltage V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . V- -0.3 to V+ +0.3V Differential Input Voltage (Note 1) . . . . . . . . . [(V+ +0.3) - (V- -0.3)]V Duration of Output Short Circuit (Note 2). . . . . . . . . . . . . . Unlimited Thermal Resistance (Typical, Note 3) JA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only) Operating Conditions Temperature Range ICL76XXC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 70oC 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. NOTES: 1. Long term offset voltage stability will be degraded if large input differential voltages are applied for long periods of time. 2. The outputs may be shorted to ground or to either supply, for VSUPPLY 10V. Care must be taken to insure that the dissipation rating is not exceeded. 3. JA is measured with the component mounted on an evaluation PC board in free air. VSUPPLY = 5V, Unless Otherwise Specified Electrical Specifications PARAMETER Input Offset Voltage Temperature Coefficient of VOS Input Offset Current Input Bias Current Common Mode Voltage Range (Except ICL7612) Extended Common Mode Voltage Range (ICL7612 Only) Output Voltage Swing SYMBOL ICL7611B, ICL7612B ICL7611D, ICL7612D TEMP (oC) MIN TYP MAX MIN TYP MAX UNITS 25 - - 5 - - 15 mV Full - - 7 - - 20 mV - - 15 - - 25 - V/oC 25 - 0.5 30 - 0.5 30 pA Full - - 300 - - 300 pA 25 - 1.0 50 - 1.0 50 pA Full - - 400 - - 400 pA IQ = 10A 25 4.4 - - 4.4 - - V IQ = 100A 25 4.2 - - 4.2 - - V IQ = 1mA 25 3.7 - - 3.7 - - V IQ = 10A 25 5.3 - - 5.3 - - V IQ = 100A 25 +5.3, -5.1 - - +5.3, -5.1 - - V IQ = 1mA 25 +5.3, -4.5 - - +5.3, -4.5 - - V IQ = 10A, RL = 1M 25 4.9 - - 4.9 - - V Full 4.8 - - 4.8 - - V 25 4.9 - - 4.9 - - V Full 4.8 - - 4.8 - - V 25 4.5 - - 4.5 - - V Full 4.3 - - 4.3 - - V 25 80 104 - 80 104 - dB Full 75 - - 75 - - dB 25 80 102 - 80 102 - dB Full 75 - - 75 - - dB 25 76 83 - 76 83 - dB Full 72 - - 72 - - dB TEST CONDITIONS RS 100k VOS VOS/T RS 100k IOS IBIAS VCMR VCMR VOUT IQ = 100A, RL = 100k IQ = 1mA, RL = 10k Large Signal Voltage Gain VO = 4.0V, RL = 1M, IQ = 10A AVOL VO = 4.0V, RL = 100k, IQ = 100A VO = 4.0V, RL = 10k, IQ = 1mA 2 ICL7611, ICL7612 VSUPPLY = 5V, Unless Otherwise Specified (Continued) Electrical Specifications PARAMETER SYMBOL Unity Gain Bandwidth GBW Input Resistance Common Mode Rejection Ratio Power Supply Rejection Ratio (VSUPPLY = 8V to 2V) ICL7611B, ICL7612B ICL7611D, ICL7612D TEMP (oC) MIN TYP MAX MIN TYP MAX UNITS IQ = 10A 25 - 0.044 - - 0.044 - MHz IQ = 100A 25 - 0.48 - - 0.48 - MHz IQ = 1mA 25 - 1.4 - - 1.4 - MHz 25 - 1012 - - 1012 - RS 100k, IQ = 10A 25 70 96 - 70 96 - dB RS 100k, IQ = 100A 25 70 91 - 70 91 - dB RS 100k, IQ = 1mA 25 60 87 - 60 87 - dB RS 100k, IQ = 10A 25 80 94 - 80 94 - dB RS 100k, IQ = 100A 25 80 86 - 80 86 - dB RS 100k, IQ = 1mA 25 70 77 - 70 77 - dB TEST CONDITIONS RIN CMRR PSRR Input Referred Noise Voltage eN RS = 100, f = 1kHz 25 - 100 - - 100 - nV/Hz Input Referred Noise Current iN RS = 100, f = 1kHz 25 - 0.01 - - 0.01 - pA/Hz Supply Current (No Signal, No Load) ISUPPLY IQ SET = +5V, Low Bias 25 - 0.01 0.02 - 0.01 0.02 mA IQ SET = 0V, Medium Bias 25 - 0.1 0.25 - 0.1 0.25 mA IQ SET = -5V, High Bias 25 - 1.0 2.5 - 1.0 2.5 mA AV = 100 25 - 120 - - 120 - dB IQ = 10A, RL = 1M 25 - 0.016 - - 0.016 - V/s IQ = 100A, RL = 100k 25 - 0.16 - - 0.16 - V/s IQ = 1mA, RL = 10k 25 - 1.6 - - 1.6 - V/s IQ = 10A, RL = 1M 25 - 20 - - 20 - s IQ = 100A, RL = 100k 25 - 2 - - 2 - s IQ = 1mA, RL = 10k 25 - 0.9 - - 0.9 - s IQ = 10A, RL = 1M 25 - 5 - - 5 - % IQ = 100A, RL = 100k 25 - 10 - - 10 - % IQ = 1mA, RL = 10k 25 - 40 - - 40 - % Channel Separation VO1/VO2 Slew Rate (AV = 1, CL = 100pF, VIN = 8VP-P) SR Rise Time (VIN = 50mV, CL = 100pF) Overshoot Factor (VIN = 50mV, CL = 100pF) tr OS VSUPPLY = 1V, IQ = 10A, Unless Otherwise Specified Electrical Specifications PARAMETER SYMBOL Input Offset Voltage VOS TEST CONDITIONS RS 100k VOS/T RS 100k Temperature Coefficient of VOS Input Offset Current IOS Input Bias Current IBIAS Common Mode Voltage Range (Except ICL7612) VCMR 3 ICL7611B, ICL7612B TEMP (oC) MIN TYP MAX UNITS 25 - - 5 mV Full - - 7 mV - - 15 - V/oC 25 - 0.5 30 pA Full - - 300 pA 25 - 1.0 50 pA Full - - 500 pA 25 0.6 - - V ICL7611, ICL7612 VSUPPLY = 1V, IQ = 10A, Unless Otherwise Specified (Continued) Electrical Specifications PARAMETER TEST CONDITIONS SYMBOL Extended Common Mode Voltage Range (ICL7612 Only) VCMR Output Voltage Swing VOUT Large Signal Voltage Gain RL = 1M VO = 0.1V, RL = 1M AVOL Unity Gain Bandwidth GBW Input Resistance ICL7611B, ICL7612B TEMP (oC) RIN MIN TYP MAX UNITS 25 +0.6 to -1.1 - - V 25 0.98 - - V Full 0.96 - - V 25 - 90 - dB Full - 80 - dB 25 - 0.044 - MHz 25 - 1012 - Common Mode Rejection Ratio CMRR RS 100k 25 - 80 - dB Power Supply Rejection Ratio PSRR RS 100k 25 - 80 - dB Input Referred Noise Voltage eN RS = 100 , f = 1kHz 25 - 100 - nV/Hz Input Referred Noise Current iN RS = 100 , f = 1kHz 25 - 0.01 - pA/Hz No Signal, No Load 25 - 6 15 A AV = 1, CL = 100pF, VIN = 0.2VP-P, RL = 1M 25 - 0.016 - V/s Supply Current ISUPPLY Slew Rate SR Rise Time tr VIN = 50mV, CL = 100pF RL = 1M 25 - 20 - s OS VIN = 50mV, CL = 100pF, RL = 1M 25 - 5 - % Overshoot Factor Schematic Diagram IQ SETTING STAGE INPUT STAGE OUTPUT STAGE V+ 3K 900K 3K QP5 BAL BAL QP1 QP1 QP6 QP7 QP3 6.3V QP8 100K QP4 V+ +INPUT QP9 QN1 QN2 CFF = 9pF OUTPUT VV+ CC = 33pF -INPUT QN7 QN4 V- QN6 QN9 QN10 QN5 QN3 QN11 6.3V QN8 V- V+ 4 IQ SET ICL7611, ICL7612 Application Information Static Protection All devices are static protected by the use of input diodes. However, strong static fields should be avoided, as it is possible for the strong fields to cause degraded diode junction characteristics, which may result in increased input leakage currents. Latchup Avoidance Junction-isolated CMOS circuits employ configurations which produce a parasitic 4-layer (PNPN) structure. The 4-layer structure has characteristics similar to an SCR, and under certain circumstances may be triggered into a low impedance state resulting in excessive supply current. To avoid this condition, no voltage greater than 0.3V beyond the supply rails may be applied to any pin. In general, the op amp supplies must be established simultaneously with, or before any input signals are applied. If this is not possible, the drive circuits must limit input current flow to 2mA to prevent latchup. Choosing the Proper IQ IQ = 10A, nulling may not be possible with higher values of VOS . Frequency Compensation The ICL7611 and ICL7612 are internally compensated, and are stable for closed loop gains as low as unity with capacitive loads up to 100pF. Extended Common Mode Input Range The ICL7612 incorporates additional processing which allows the input CMVR to exceed each power supply rail by 0.1V for applications where VSUPP 1.5V. For those applications where VSUPP 1.5V the input CMVR is limited in the positive direction, but may exceed the negative supply rail by 0.1V in the negative direction (e.g., for VSUPPLY = 1V, the input CMVR would be +0.6V to -1.1V). Operation At VSUPPLY = 1V Operation at VSUPPLY = 1V is guaranteed at IQ = 10A for A and B grades only. The ICL7611 and ICL7612 have a similar IQ set-up scheme, which allows the amplifier to be set to nominal quiescent currents of 10A, 100A or 1mA. These current settings change only very slightly over the entire supply voltage range. The ICL7611/12 have an external IQ control terminal, permitting user selection of quiescent current. To set the IQ connect the IQ terminal as follows: Output swings to within a few millivolts of the supply rails are achievable for RL 1M. Guaranteed input CMVR is 0.6V minimum and typically +0.9V to -0.7V at VSUPPLY = 1V. For applications where greater common mode range is desirable, refer to the description of ICL7612 above. IQ = 10A - IQ pin to V+ The user is cautioned that, due to extremely high input impedances, care must be exercised in layout, construction, board cleanliness, and supply filtering to avoid hum and noise pickup. IQ = 100A - IQ pin to ground. If this is not possible, any voltage from V+ - 0.8 to V- +0.8 can be used. IQ = 1mA - IQ pin to VNOTE: The output current available is a function of the quiescent current setting. For maximum peak-to-peak output voltage swings into low impedance loads, IQ of 1mA should be selected. Typical Applications Note that in no case is IQ shown. The value of IQ must be chosen by the designer with regard to frequency response and power dissipation. Output Stage and Load Driving Considerations Each amplifiers' quiescent current flows primarily in the output stage. This is approximately 70% of the IQ settings. This allows output swings to almost the supply rails for output loads of 1M, 100k, and 10k, using the output stage in a highly linear class A mode. In this mode, crossover distortion is avoided and the voltage gain is maximized. However, the output stage can also be operated in Class AB for higher output currents. (See graphs under Typical Operating Characteristics). During the transition from Class A to Class B operation, the output transfer characteristic is non-linear and the voltage gain decreases. VIN + VOUT ICL7612 - RL 10K FIGURE 1. SIMPLE FOLLOWER (NOTE 4) +5 VIN 100K Input Offset Nulling - +5 VOUT TO CMOS OR LPTTL LOGIC ICL7612 + 1M Offset nulling may be achieved by connecting a 25K pot between the BAL terminals with the wiper connected to V+. At quiescent currents of 1mA and 100A the nulling range provided is adequate for all VOS selections; however with 5 NOTE: 4. By using the ICL7612 in this application, the circuit will follow rail to rail inputs. FIGURE 2. LEVEL DETECTOR (NOTE 4) ICL7611, ICL7612 - 1M ICL7611 + 1M VOUT ICL7611 + - ICL7611 + 1F + 1M VV+ DUTY CYCLE 680k WAVEFORM GENERATOR NOTE: Since the output range swings exactly from rail to rail, frequency and duty cycle are virtually independent of power supply variations. NOTE: Low leakage currents allow integration times up to several hours. FIGURE 3. PHOTOCURRENT INTEGRATOR FIGURE 4. PRECISE TRIANGLE/SQUARE WAVE GENERATOR 1M +8V VOH 0.5F 10K VIN 20K 2.2M + 10F TO SUCCEEDING INPUT STAGE 20K ICL7611 - 1.8K = 5% SCALE ADJUST OUT IQ - VOL V- - V+ ICL7611 COMMON TA = 125oC + V+ -8V + FIGURE 5. AVERAGING AC TO DC CONVERTER FOR A/D CONVERTERS SUCH AS ICL7106, ICL7107, ICL7109, ICL7116, ICL7117 FIGURE 6. BURN-IN AND LIFE TEST CIRCUIT VIN BAL + BAL 25k V+ FIGURE 7. VOS NULL CIRCUIT 6 VOUT ICL7611, ICL7612 0.2F 30K 0.2F 0.2F 160K 680K + 100K 51K ICL7611 + - ICL7611 360K INPUT 0.1F 0.2F 1M 0.1F 360K (NOTE 5) OUTPUT 1M (NOTE 5) NOTES: 5. Note that small capacitors (25pF to 50pF) may be needed for stability in some cases. 6. The low bias currents permit high resistance and low capacitance values to be used to achieve low frequency cutoff. fC = 10Hz, AVCL = 4, Passband ripple = 0.1dB. FIGURE 8. FIFTH ORDER CHEBYCHEV MULTIPLE FEEDBACK LOW PASS FILTER Typical Performance Curves 104 TA = 25oC NO LOAD NO SIGNAL V+ - V- = 10V NO LOAD NO SIGNAL IQ = 1mA SUPPLY CURRENT (A) SUPPLY CURRENT (A) 10K 1K IQ = 100A 100 IIQQ == 10A 1mA 10 1 0 2 4 6 8 10 SUPPLY VOLTAGE (V) 12 14 INPUT BIAS CURRENT (pA) VS = 5V 100 10 1.0 0.1 -50 -25 0 25 50 75 FREE-AIR TEMPERATURE (oC) 100 FIGURE 11. INPUT BIAS CURRENT vs TEMPERATURE 7 125 102 IQ = 100A IQ = 10A 10 -25 0 25 50 75 FREE-AIR TEMPERATURE (oC) 100 125 FIGURE 10. SUPPLY CURRENT PER AMPLIFIER vs FREE-AIR TEMPERATURE DIFFERENTIAL VOLTAGE GAIN (kV/V) 1000 IQ = 1mA 1 -50 16 FIGURE 9. SUPPLY CURRENT PER AMPLIFIER vs SUPPLY VOLTAGE 103 1000 VSUPP = 10V VOUT = 8V RL = 1M IQ = 10A 100 RL = 100k IQ = 100A RL = 10k IQ = 1mA 10 1 -75 -50 -25 0 25 50 75 100 125 FREE-AIR TEMPERATURE (oC) FIGURE 12. LARGE SIGNAL DIFFERENTIAL VOLTAGE GAIN vs FREE-AIR TEMPERATURE ICL7611, ICL7612 Typical Performance Curves (Continued) 105 IQ = 100A IQ = 1mA 104 0 45 103 PHASE SHIFT (IQ = 1mA) 102 90 135 10 IQ = 10A 1 0.1 1.0 10 100 1K 10K FREQUENCY (Hz) 180 1M 100K FIGURE 13. LARGE SIGNAL FREQUENCY RESPONSE SUPPLY VOLTAGE REJECTION RATIO (dB) VSUPP = 10V 95 90 IQ = 100A 85 IQ = 10A 80 75 70 65 -75 -50 -25 0 25 50 IQ = 10A 95 IQ = 100A 90 IQ = 1mA 85 80 75 70 -75 -50 -25 25 50 75 100 125 75 100 125 600 TA = 25oC 3V VSUPP 16V 500 400 300 200 100 0 10 100 FREE-AIR TEMPERATURE (oC) FIGURE 15. POWER SUPPLY REJECTION RATIO vs FREE-AIR TEMPERATURE 1K FREQUENCY (Hz) 10K 100K FIGURE 16. EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY 16 16 TA = 25oC 14 IQ = 1mA VSUPP = 8V 12 MAXIMUM OUTPUT VOLTAGE (VP-P) MAXIMUM OUTPUT VOLTAGE (VP-P) 0 FIGURE 14. COMMON MODE REJECTION RATIO vs FREE-AIR TEMPERATURE 100 IQ = 1mA VSUPP = 10V 100 FREE-AIR TEMPERATURE (oC) EQUIVALENT INPUT NOISE VOLTAGE (nV/Hz) 106 COMMON MODE REJECTION RATIO (dB) 105 TA = 25oC VSUPP = 15V PHASE SHIFT (DEGREES) DIFFERENTIAL VOLTAGE GAIN (V/V) 107 IQ = 10A IQ = 100A 10 8 VSUPP = 5V 6 4 2 0 100 VSUPP = 2V 1K 10K 100K FREQUENCY (Hz) 1M FIGURE 17. OUTPUT VOLTAGE vs FREQUENCY 8 10M VSUPP = 10V IQ = 1mA 14 12 10 TA = -55oC 8 TA = 25oC 6 TA = 125oC 4 2 0 10K 100K 1M FREQUENCY (Hz) FIGURE 18. OUTPUT VOLTAGE vs FREQUENCY 10M ICL7611, ICL7612 Typical Performance Curves (Continued) 12 TA = 25oC MAXIMUM OUTPUT VOLTAGE (VP-P) MAXIMUM OUTPUT VOLTAGE (VP-P) 16 14 12 RL = 100k - 1M 10 RL = 10k 8 6 4 2 4 6 8 10 12 SUPPLY VOLTAGE (V) 14 6 RL = 2k 4 VSUPP = 10V IQ = 1mA 2 -50 -25 0 25 50 75 FREE-AIR TEMPERATURE (oC) 125 0.01 40 IQ = 1mA 30 20 10 0 0 2 4 6 8 10 12 14 IQ = 10A 0.1 IQ = 100A 1.0 IQ = 1mA 10 16 0 2 4 6 8 10 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) FIGURE 21. OUTPUT SOURCE CURRENT vs SUPPLY VOLTAGE 14 14 16 8 TA = 25oC V+ - V- = 10V IQ = 1mA 12 10 8 6 4 2 0 0.1 12 FIGURE 22. OUTPUT SINK CURRENT vs SUPPLY VOLTAGE INPUT AND OUTPUT VOLTAGE (V) 16 MAXIMUM OUTPUT VOLTAGE (VP-P) 100 FIGURE 20. OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE MAXIMUM OUTPUT SINK CURRENT (mA) MAXIMUM OUTPUT SOURCE CURRENT (mA) RL = 10k 8 0 -75 16 FIGURE 19. OUTPUT VOLTAGE vs SUPPLY VOLTAGE RL = 100k 10 6 TA = 25oC, VSUPP = 10V RL = 10k, CL = 100pF 4 2 OUTPUT 0 -2 INPUT -4 -6 1.0 10 LOAD RESISTANCE (k) FIGURE 23. OUTPUT VOLTAGE vs LOAD RESISTANCE 9 100 0 2 4 6 TIME (s) 8 10 FIGURE 24. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 1mA) 12 ICL7611, ICL7612 Typical Performance Curves (Continued) 6 8 TA = 25oC, VSUPP = 10V RL = 100k, CL = 100pF INPUT AND OUTPUT VOLTAGE (V) INPUT AND OUTPUT VOLTAGE (V) 8 4 2 OUTPUT 0 -2 INPUT -4 -6 6 4 2 OUTPUT 0 INPUT -2 -4 -6 0 20 40 60 TIME (s) 80 100 120 FIGURE 25. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 100A) TA = 25oC, VSUPP = 10V RL = 1M, CL = 100pF 0 200 400 600 TIME (s) 800 1000 1200 FIGURE 26. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 10A) All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design 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. 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