ICL7611DCBA

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, 100µA, or 10µA, with no external components. This results in power consumption as low as 20µW. 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 1012Ω 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/µs, and unity gain bandwidth of 1MHz at IQ = 1mA. Features • Wide Operating Voltage Range . . . . . . . . . . . ±1V to ±8V • High Input Impedance . . . . . . . . . . . . . . . . . . . . . . 1012Ω • Programmable Power Consumption. . . . . . Low as 20µW • 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 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Copyright © 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) θJA (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. θJA 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 ≤ 100kΩ 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 µV/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 ≤ 100kΩ 25 Full Input Bias Current IBIAS 25 Full Common Mode Voltage Range (Except ICL7612) VCMR IQ = 10µA IQ = 100µA IQ = 1mA 25 25 25 25 25 25 25 Full Extended Common Mode Voltage Range (ICL7612 Only) VCMR IQ = 10µA IQ = 100µA IQ = 1mA Output Voltage Swing VOUT IQ = 10µA, RL = 1MΩ IQ = 100µA, RL = 100kΩ 25 Full IQ = 1mA, RL = 10kΩ 25 Full Large Signal Voltage Gain AVOL VO = ±4.0V, RL = 1MΩ, IQ = 10µA VO = ±4.0V, RL = 100kΩ, IQ = 100µA VO = ±4.0V, RL = 10kΩ, 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 = 10µA IQ = 100µA IQ = 1mA Input Resistance Common Mode Rejection Ratio RIN CMRR RS ≤ 100kΩ, IQ = 10µA RS ≤ 100kΩ, IQ = 100µA RS ≤ 100kΩ, 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 ≤ 100kΩ, IQ = 10µA RS ≤ 100kΩ, IQ = 100µA RS ≤ 100kΩ, IQ = 1mA eN iN ISUPPLY RS = 100Ω, f = 1kHz RS = 100Ω, 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 = 10µA, RL = 1MΩ IQ = 100µA, RL = 100kΩ IQ = 1mA, RL = 10kΩ tr IQ = 10µA, RL = 1MΩ IQ = 100µA, RL = 100kΩ IQ = 1mA, RL = 10kΩ OS IQ = 10µA, RL = 1MΩ IQ = 100µA, RL = 100kΩ IQ = 1mA, RL = 10kΩ 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 Ω dB dB dB dB dB dB nV/√Hz pA/√Hz mA mA mA dB V/µs V/µs V/µs µs µs µs % % % Electrical Specifications PARAMETER Input Offset Voltage VSUPPLY = ±1V, IQ = 10µA, Unless Otherwise Specified TEST CONDITIONS RS ≤ 100kΩ 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 µV/oC pA pA pA pA V SYMBOL VOS Temperature Coefficient of VOS Input Offset Current ∆VOS/∆T RS ≤ 100kΩ IOS 25 Full Input Bias Current IBIAS 25 Full Common Mode Voltage Range (Except ICL7612) VCMR 25 3 ICL7611, ICL7612 Electrical Specifications PARAMETER Extended Common Mode Voltage Range (ICL7612 Only) Output Voltage Swing VSUPPLY = ±1V, IQ = 10µA, Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP (oC) 25 RL = 1MΩ 25 Full Large Signal Voltage Gain AVOL VO = ±0.1V, RL = 1MΩ 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 ≤ 100kΩ RS ≤ 100kΩ RS = 100Ω , f = 1kHz RS = 100Ω , f = 1kHz No Signal, No Load AV = 1, CL = 100pF, VIN = 0.2VP-P, RL = 1MΩ VIN = 50mV, CL = 100pF RL = 1MΩ VIN = 50mV, CL = 100pF, RL = 1MΩ 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 Ω dB dB nV/√Hz pA/√Hz µA V/µs µs % 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 4 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 = 10µA, 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 = 10µA for A and B grades only. Output swings to within a few millivolts of the supply rails are achievable for RL ≥ 1MΩ. 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 10µA, 100µA 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 = 10µA - IQ pin to V+ IQ = 100µA - 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 1MΩ, 100kΩ, and 10kΩ, 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 100µA 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 1µF + ICL7611 + 1M VOUT 1M ICL7611 + λ ICL7611 + 1M VV+ DUTY CYCLE 680kΩ 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 0.5µF 10K VIN 2.2M 20K TO SUCCEEDING INPUT STAGE VOL +8V + ICL7611 10µF 1.8K = 5% SCALE ADJUST + V+ OUT IQ TA = 125oC 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 6 ICL7611, ICL7612 0.2µF 30K 160K + ICL7611 680K 100K 51K + ICL7611 0.2µF 0.2µF 360K INPUT 0.1µF 360K (NOTE 5) 0.2µF 0.1µF 1M 1M OUTPUT (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 (µA) 103 V+ - V- = 10V NO LOAD NO SIGNAL IQ = 1mA SUPPLY CURRENT (µA) 1K IQ = 100µA 100 IIQ = 10µA Q = 1mA 10 102 IQ = 100µA 10 IQ = 10µA 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 = 1MΩ IQ = 10µA RL = 100kΩ IQ = 100µA 100 RL = 10kΩ IQ = 1mA 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 7 ICL7611, ICL7612 Typical Performance Curves 107 DIFFERENTIAL VOLTAGE GAIN (V/V) 106 105 104 103 102 10 1 0.1 TA = 25oC VSUPP = 15V (Continued) 105 COMMON MODE REJECTION RATIO (dB) VSUPP = 10V 100 95 90 85 80 75 70 -75 IQ = 10µA IQ = 100µA IQ = 1mA 0 45 PHASE SHIFT (IQ = 1mA) 90 135 IQ = 10µA 1.0 10 100 1K 10K FREQUENCY (Hz) 100K 180 1M PHASE SHIFT (DEGREES) IQ = 100µA 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 = 100µA IQ = 10µA 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 = 10µA IQ = 100µA 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 = 100kΩ - 1MΩ RL = 10kΩ (Continued) 12 10 8 6 4 2 0 -75 VSUPP = 10V IQ = 1mA RL = 100kΩ RL = 10kΩ RL = 2kΩ 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 = 10µA 0.1 20 IQ = 100µA 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 (kΩ) 100 0 2 4 6 TIME (µs) 8 10 12 OUTPUT TA = 25oC, VSUPP = 10V RL = 10kΩ, CL = 100pF FIGURE 23. OUTPUT VOLTAGE vs LOAD RESISTANCE FIGURE 24. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 1mA) 9 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 (µs) 80 100 120 INPUT AND OUTPUT VOLTAGE (V) TA = 25oC, VSUPP = 10V RL = 100kΩ, CL = 100pF (Continued) 8 6 4 2 OUTPUT 0 INPUT -2 -4 -6 TA = 25oC, VSUPP = 10V RL = 1MΩ, CL = 100pF 0 200 400 600 TIME (µs) 800 1000 1200 FIGURE 25. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 100µA) FIGURE 26. VOLTAGE FOLLOWER LARGE SIGNAL PULSE RESPONSE (IQ = 10µA) 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. 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