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ICL7611, ICL7612
Data Sheet October 1999 File Number 2919.5
1.4MHz, Low Power CMOS Operational Amplifiers
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. 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. The inputs are internally protected. Outputs are fully protected against short circuits to ground or to either supply. AC performance is excellent, with a slew rate of 1.6V/s, and unity gain bandwidth of 1MHz at IQ = 1mA.
Features
* Wide Operating Voltage Range . . . . . . . . . . . 1V to 8V * High Input Impedance . . . . . . . . . . . . . . . . . . . . . . 1012 * 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
ICL7611, ICL7612 (PDIP, SOIC) TOP VIEW
BAL
1 2 3 4 +
8
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.
IQ SET V+ OUT BAL
-IN +IN V-
-
7 6 5
Ordering Information
PART NUMBER ICL7611BCPA ICL7611DCPA ICL7611DCBA ICL7611DCBA-T ICL7612BCPA ICL7612DCPA ICL7612DCBA ICL7612DCBA-T TEMP. RANGE (oC) 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 PACKAGE 8 Ld PDIP - B Grade 8 Ld PDIP - D Grade 8 Ld SOIC - D Grade 8 Ld SOIC - D Grade Tape and Reel 8 Ld PDIP - B Grade 8 Ld PDIP - D Grade 8 Ld SOIC - D Grade 8 Ld SOIC - D Grade Tape and Reel PKG. NO. E8.3 E8.3 M8.15 M8.15 E8.3 E8.3 M8.15 M8.15
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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
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 Information
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.
Electrical Specifications
PARAMETER Input Offset Voltage SYMBOL VOS
VSUPPLY = 5V, Unless Otherwise Specified TEST CONDITIONS RS 100k ICL7611B, ICL7612B TEMP (oC) 25 Full MIN 4.4 4.2 3.7 5.3 +5.3, -5.1 +5.3, -4.5 4.9 4.8 4.9 4.8 4.5 4.3 80 75 80 75 76 72 TYP 15 0.5 1.0 104 102 83 MAX 5 7 30 300 50 400 ICL7611D, ICL7612D MIN 4.4 4.2 3.7 5.3 +5.3, -5.1 +5.3, -4.5 4.9 4.8 4.9 4.8 4.5 4.3 80 75 80 75 76 72 TYP 25 0.5 1.0 104 102 83 MAX 15 20 30 300 50 400 UNITS mV mV V/oC pA pA pA pA V V V V V V V V V V V V dB dB dB dB dB dB
Temperature Coefficient of VOS Input Offset Current
VOS/T IOS
RS 100k
25 Full
Input Bias Current
IBIAS
25 Full
Common Mode Voltage Range (Except ICL7612)
VCMR
IQ = 10A IQ = 100A IQ = 1mA
25 25 25 25 25 25 25 Full
Extended Common Mode Voltage Range (ICL7612 Only)
VCMR
IQ = 10A IQ = 100A IQ = 1mA
Output Voltage Swing
VOUT
IQ = 10A, RL = 1M
IQ = 100A, RL = 100k
25 Full
IQ = 1mA, RL = 10k
25 Full
Large Signal Voltage Gain
AVOL
VO = 4.0V, RL = 1M, IQ = 10A VO = 4.0V, RL = 100k, IQ = 100A VO = 4.0V, RL = 10k, IQ = 1mA
25 Full 25 Full 25 Full
2
ICL7611, ICL7612
Electrical Specifications
PARAMETER Unity Gain Bandwidth SYMBOL GBW VSUPPLY = 5V, Unless Otherwise Specified (Continued) TEST CONDITIONS IQ = 10A IQ = 100A IQ = 1mA Input Resistance Common Mode Rejection Ratio RIN CMRR RS 100k, IQ = 10A RS 100k, IQ = 100A RS 100k, IQ = 1mA Power Supply Rejection Ratio (VSUPPLY = 8V to 2V) Input Referred Noise Voltage Input Referred Noise Current Supply Current (No Signal, No Load) PSRR RS 100k, IQ = 10A RS 100k, IQ = 100A RS 100k, IQ = 1mA eN iN ISUPPLY RS = 100, f = 1kHz RS = 100, f = 1kHz IQ SET = +5V, Low Bias IQ SET = 0V, Medium Bias IQ SET = -5V, High Bias Channel Separation Slew Rate (AV = 1, CL = 100pF, VIN = 8VP-P) Rise Time (VIN = 50mV, CL = 100pF) Overshoot Factor (VIN = 50mV, CL = 100pF) VO1/VO2 SR AV = 100 IQ = 10A, RL = 1M IQ = 100A, RL = 100k IQ = 1mA, RL = 10k tr IQ = 10A, RL = 1M IQ = 100A, RL = 100k IQ = 1mA, RL = 10k OS IQ = 10A, RL = 1M IQ = 100A, RL = 100k IQ = 1mA, RL = 10k ICL7611B, ICL7612B TEMP (oC) 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 MIN 70 70 60 80 80 70 TYP 0.044 0.48 1.4 1012 96 91 87 94 86 77 100 0.01 0.01 0.1 1.0 120 0.016 0.16 1.6 20 2 0.9 5 10 40 MAX 0.02 0.25 2.5 ICL7611D, ICL7612D MIN 70 70 60 80 80 70 TYP 0.044 0.48 1.4 1012 96 91 87 94 86 77 100 0.01 0.01 0.1 1.0 120 0.016 0.16 1.6 20 2 0.9 5 10 40 MAX 0.02 0.25 2.5 UNITS MHz MHz MHz dB dB dB dB dB dB nV/Hz pA/Hz mA mA mA dB V/s V/s V/s s s s % % %
Electrical Specifications
PARAMETER Input Offset Voltage
VSUPPLY = 1V, IQ = 10A, Unless Otherwise Specified TEST CONDITIONS RS 100k TEMP (oC) 25 Full ICL7611B, ICL7612B MIN 0.6 TYP 15 0.5 1.0 MAX 5 7 30 300 50 500 UNITS mV mV V/oC pA pA pA pA V
SYMBOL VOS
Temperature Coefficient of VOS Input Offset Current
VOS/T RS 100k IOS
25 Full
Input Bias Current
IBIAS
25 Full
Common Mode Voltage Range (Except ICL7612)
VCMR
25
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ICL7611, ICL7612
Electrical Specifications
PARAMETER Extended Common Mode Voltage Range (ICL7612 Only) Output Voltage Swing VSUPPLY = 1V, IQ = 10A, Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP (oC) 25 RL = 1M 25 Full Large Signal Voltage Gain AVOL VO = 0.1V, RL = 1M 25 Full Unity Gain Bandwidth Input Resistance Common Mode Rejection Ratio Power Supply Rejection Ratio Input Referred Noise Voltage Input Referred Noise Current Supply Current Slew Rate Rise Time Overshoot Factor GBW RIN CMRR PSRR eN iN ISUPPLY SR tr OS RS 100k RS 100k RS = 100 , f = 1kHz RS = 100 , f = 1kHz No Signal, No Load AV = 1, CL = 100pF, VIN = 0.2VP-P, RL = 1M VIN = 50mV, CL = 100pF RL = 1M VIN = 50mV, CL = 100pF, RL = 1M 25 25 25 25 25 25 25 25 25 25 ICL7611B, ICL7612B MIN +0.6 to -1.1 0.98 0.96 TYP 90 80 0.044 1012 80 80 100 0.01 6 0.016 20 5 MAX 15 UNITS V V V dB dB MHz dB dB nV/Hz pA/Hz A V/s s %
SYMBOL VCMR VOUT
Schematic Diagram
IQ INPUT STAGE SETTING STAGE OUTPUT STAGE V+ 3K BAL QP1 V+ +INPUT QN1 QN2 QP1 3K 900K QP5 BAL QP3 100K QP4 QP9 CFF = 9pF OUTPUT VV+ CC = 33pF QP6 QP7 QP8 6.3V
-INPUT QN7 VQN3 QN4 QN5 QN8 VQN6 QN9 QN10 6.3V QN11
V+
IQ SET
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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. 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.
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.
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. 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.
Choosing the Proper IQ
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: IQ = 10A - IQ pin to V+ 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
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. 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
+ ICL7612 VOUT RL 10K
-
FIGURE 1. SIMPLE FOLLOWER (NOTE 4)
VIN 100K
+5
-
+5 VOUT TO CMOS OR LPTTL LOGIC
ICL7612 +
Input Offset Nulling
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
NOTE:
1M
4. By using the ICL7612 in this application, the circuit will follow rail to rail inputs. FIGURE 2. LEVEL DETECTOR (NOTE 4)
5
ICL7611, ICL7612
1F + ICL7611 + 1M VOUT
1M
ICL7611 +
ICL7611 +
1M VV+ DUTY CYCLE 680k WAVEFORM GENERATOR
NOTE: Low leakage currents allow integration times up to several hours. FIGURE 3. PHOTOCURRENT INTEGRATOR
NOTE: Since the output range swings exactly from rail to rail, frequency and duty cycle are virtually independent of power supply variations. FIGURE 4. PRECISE TRIANGLE/SQUARE WAVE GENERATOR
1M VOH 0.5F 10K VIN 2.2M 20K TO SUCCEEDING INPUT STAGE VOL
+8V
+ V+ OUT IQ
TA = 125oC
+ ICL7611
10F 1.8K = 5% SCALE ADJUST
20K
-
-
V-
COMMON ICL7611 + -8V
V+
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 25k BAL VOUT
V+
FIGURE 7. VOS NULL CIRCUIT
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ICL7611, ICL7612
0.2F 30K 160K + ICL7611 680K
0.2F
0.2F
100K
51K + ICL7611
360K INPUT 0.1F 0.2F 0.1F
1M OUTPUT 1M (NOTE 5)
360K (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
10K TA = 25oC NO LOAD NO SIGNAL 104 IQ = 1mA SUPPLY CURRENT (A) 103 V+ - V- = 10V NO LOAD NO SIGNAL IQ = 1mA
SUPPLY CURRENT (A)
1K IQ = 100A 100
102
IQ = 100A
IIQ = 10A Q = 1mA 10
10
IQ = 10A
1
0
2
4
6 8 10 SUPPLY VOLTAGE (V)
12
14
16
1 -50
-25
0 25 50 75 FREE-AIR TEMPERATURE (oC)
100
125
FIGURE 9. SUPPLY CURRENT PER AMPLIFIER vs SUPPLY VOLTAGE
FIGURE 10. SUPPLY CURRENT PER AMPLIFIER vs FREE-AIR TEMPERATURE
VS = 5V INPUT BIAS CURRENT (pA) 100
DIFFERENTIAL VOLTAGE GAIN (kV/V)
1000
1000
VSUPP = 10V VOUT = 8V RL = 1M IQ = 10A RL = 100k IQ = 100A RL = 10k IQ = 1mA
100
10
10
1.0
0.1 -50
-25
0 25 50 75 FREE-AIR TEMPERATURE (oC)
100
125
1 -75
-50
-25
0
25
50
75
100
125
FREE-AIR TEMPERATURE (oC)
FIGURE 11. INPUT BIAS CURRENT vs TEMPERATURE
FIGURE 12. LARGE SIGNAL DIFFERENTIAL VOLTAGE GAIN vs FREE-AIR TEMPERATURE
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ICL7611, ICL7612 Typical Performance Curves
107 DIFFERENTIAL VOLTAGE GAIN (V/V) 106 105 PHASE SHIFT (DEGREES) 104 103 102 10 1 0.1 IQ = 100A IQ = 1mA 0 45 PHASE SHIFT (IQ = 1mA) 90 135 IQ = 10A 1.0 10 100 1K 10K FREQUENCY (Hz) 100K 180 1M TA = 25oC VSUPP = 15V
(Continued)
105 COMMON MODE REJECTION RATIO (dB) VSUPP = 10V 100 IQ = 10A 95 IQ = 100A 90 85 80 75 70 -75 IQ = 1mA
-50
-25
0
25
50
75
100
125
FREE-AIR TEMPERATURE (oC)
FIGURE 13. LARGE SIGNAL FREQUENCY RESPONSE
FIGURE 14. COMMON MODE REJECTION RATIO vs FREE-AIR TEMPERATURE
100 SUPPLY VOLTAGE REJECTION RATIO (dB) IQ = 1mA 95 90 85 80 75 70 65 -75 IQ = 100A IQ = 10A VSUPP = 10V
EQUIVALENT INPUT NOISE VOLTAGE (nV/Hz)
600 500 400 300 200 100 0 10 100 1K FREQUENCY (Hz) 10K 100K TA = 25oC 3V VSUPP 16V
-50
-25
0
25
50
75
100
125
FREE-AIR TEMPERATURE (oC)
FIGURE 15. POWER SUPPLY REJECTION RATIO vs FREE-AIR TEMPERATURE
FIGURE 16. EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY
16 MAXIMUM OUTPUT VOLTAGE (VP-P) MAXIMUM OUTPUT VOLTAGE (VP-P) 14 12 10 8 6 4 2 0 100 VSUPP = 2V 1K 10K 100K FREQUENCY (Hz) 1M 10M VSUPP = 5V VSUPP = 8V TA = 25oC IQ = 1mA IQ = 10A IQ = 100A
16 14 12 10 8 6 4 2 0 10K TA = -55oC TA = 25oC TA = 125oC VSUPP = 10V IQ = 1mA
100K 1M FREQUENCY (Hz)
10M
FIGURE 17. OUTPUT VOLTAGE vs FREQUENCY
FIGURE 18. OUTPUT VOLTAGE vs FREQUENCY
8
ICL7611, ICL7612 Typical Performance Curves
16 MAXIMUM OUTPUT VOLTAGE (VP-P) MAXIMUM OUTPUT VOLTAGE (VP-P) TA = 25oC 14 12 10 8 6 4 RL = 100k - 1M RL = 10k
(Continued)
12 10 8 6 4 2 0 -75 VSUPP = 10V IQ = 1mA RL = 100k
RL = 10k
RL = 2k
2
4
6
8 10 12 SUPPLY VOLTAGE (V)
14
16
-50
-25 0 25 50 75 FREE-AIR TEMPERATURE (oC)
100
125
FIGURE 19. OUTPUT VOLTAGE vs SUPPLY VOLTAGE
FIGURE 20. OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE
MAXIMUM OUTPUT SOURCE CURRENT (mA)
IQ = 1mA 30
MAXIMUM OUTPUT SINK CURRENT (mA)
40
0.01
IQ = 10A 0.1
20
IQ = 100A 1.0
10
IQ = 1mA 10 0 2 4 6 8 10 SUPPLY VOLTAGE (V) 12 14 16
0 0 2 4 6 8 10 12 14 16 SUPPLY VOLTAGE (V)
FIGURE 21. OUTPUT SOURCE CURRENT vs SUPPLY VOLTAGE
FIGURE 22. OUTPUT SINK CURRENT vs SUPPLY VOLTAGE
16 MAXIMUM OUTPUT VOLTAGE (VP-P) 14 12 10 8 6 4 2 0 0.1
INPUT AND OUTPUT VOLTAGE (V)
TA = 25oC V+ - V- = 10V IQ = 1mA
8 6 4 2 0 -2 INPUT -4 -6 1.0 10 LOAD RESISTANCE (k) 100 0 2 4 6 TIME (s) 8 10 12 OUTPUT TA = 25oC, VSUPP = 10V RL = 10k, CL = 100pF
FIGURE 23. OUTPUT VOLTAGE vs LOAD RESISTANCE
FIGURE 24. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 1mA)
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ICL7611, ICL7612 Typical Performance Curves
8 INPUT AND OUTPUT VOLTAGE (V) 6 4 2 OUTPUT 0 -2 INPUT -4 -6 0 20 40 60 TIME (s) 80 100 120 INPUT AND OUTPUT VOLTAGE (V) TA = 25oC, VSUPP = 10V RL = 100k, CL = 100pF
(Continued)
8 6 4 2 OUTPUT 0 INPUT -2 -4 -6 TA = 25oC, VSUPP = 10V RL = 1M, CL = 100pF
0
200
400 600 TIME (s)
800
1000
1200
FIGURE 25. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 100A)
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.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
Sales Office Headquarters
NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (321) 724-7000 FAX: (321) 724-7240 EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ASIA Intersil (Taiwan) Ltd. 7F-6, No. 101 Fu Hsing North Road Taipei, Taiwan Republic of China TEL: (886) 2 2716 9310 FAX: (886) 2 2715 3029
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