HFA1212 September 1998 File Number 3607.4 Dual 350MHz, Low Power Closed Loop Buffer Amplifier Features The HFA1212 is a dual closed loop Buffer featuring user programmable gain and high speed performance. Manufactured on Intersil’s proprietary complementary bipolar UHF-1 process, these devices offer wide -3dB bandwidth of 350MHz, very fast slew rate, excellent gain flatness and high output current. • Differential Phase . . . . . . . . . . . . . . . . . . . . 0.03 Degrees • Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025% • Wide -3dB Bandwidth (AV = +2) . . . . . . . . . . . . . . 350MHz • Very Fast Slew Rate (AV = -1) . . . . . . . . . . . . . . 1100V/µs • Low Supply Current . . . . . . . . . . . . . . . . . . . . 6mA/Buffer • High Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 60mA A unique feature of the pinout allows the user to select a voltage gain of +1, -1, or +2, without the use of any external components. Gain selection is accomplished via connections to the inputs, as described in the “Application Information” section. The result is a more flexible product, fewer part types in inventory, and more efficient use of board space. Compatibility with existing op amp pinouts provides flexibility to upgrade low gain amplifiers, while decreasing component count. Unlike most buffers, the standard pinout provides an upgrade path should a higher closed loop gain be needed at a future date. For Military product, refer to the HFA1212/883 data sheet. TEMP. RANGE (oC) • User Programmable For Closed-Loop Gains of +1, -1 or +2 Without Use of External Resistors • Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . 8ns • Standard Operational Amplifier Pinout Applications • High Resolution Monitors • Professional Video Processing • Medical Imaging • Video Digitizing Boards/Systems Ordering Information • RF/IF Processors PACKAGE PKG. NO. HFA1212IP -40 to 85 8 Ld PDIP E8.3 HFA1212IB (H1212I) -40 to 85 8 Ld SOIC M8.15 • Battery Powered Communications • Flash Converter Drivers • High Speed Pulse Amplifiers Pinout HFA1212 (PDIP, SOIC) TOP VIEW 1 1 -IN1 2 +IN1 3 V- 4 + + - OUT1 - PART NUMBER (BRAND) • Excellent Gain Accuracy . . . . . . . . . . . . . . . . . . . 0.99V/V 8 V+ 7 OUT2 6 -IN2 5 +IN2 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 HFA1212 Absolute Maximum Rating Thermal Information Supply Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11V DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY Output Current (Note 1) . . . . . . . . . . . . . . . . .Short Circuit Protected ESD Rating Human Body Model (Per MIL-STD-883 Method 3015.7) . . . .600V Thermal Resistance (Typical, Note 2) θJA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Maximum Junction Temperature (Die) . . . . . . . . . . . . . . . . . . . .175oC 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 . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC 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. Output is protected for short circuits to ground. Brief short circuits to ground will not degrade reliability, however, continuous (100% duty cycle) output current should not exceed 30mA for maximum reliability. 2. θJA is measured with the component mounted on an evaluation PC board in free air. VSUPPLY = ±5V, AV = +1, RL = 100Ω, Unless Otherwise Specified. Electrical Specifications (NOTE 3) TEST LEVEL TEMP (oC) MIN TYP MAX UNITS A 25 - 2 10 mV A Full - 3 15 mV Average Output Offset Voltage Drift B Full - 22 70 µV/oC Channel-to-Channel Output Offset Voltage Mismatch A 25 - - 15 mV A Full - - 30 mV ∆VCM = ±1.8V A 25 42 45 - dB ∆VCM = ±1.8V A 85 40 44 - dB TEST CONDITIONS PARAMETER INPUT CHARACTERISTICS Output Offset Voltage Common-Mode Rejection Ratio ∆VCM = ±1.2V A -40 40 45 - dB ∆VPS = ±1.8V A 25 45 49 - dB ∆VPS = ±1.8V A 85 43 48 - dB ∆VPS = ±1.2V A -40 43 48 - dB A 25 - 1 15 µA A Full - 3 25 µA Input Bias Current Drift B Full - 30 80 nA/oC Channel-to-Channel Input Bias Current Mismatch A 25 - - 15 µA A Full - - 25 µA A 25 - 0.5 1 µA/V A Full - - 3 µA/V ∆VCM = ±1.8V A 25 0.8 1.1 - MΩ ∆VCM = ±1.8V A 85 0.5 1.4 - MΩ ∆VCM = ±1.2V A -40 0.5 1.3 - MΩ Inverting Input Resistance C 25 - 350 - Ω Input Capacitance C 25 - 2 - pF Input Voltage Common Mode Range (Implied by VIO CMRR and +RIN tests) A 25, 85 ±1.8 ±2.4 - V A -40 ±1.2 ±1.7 - V Power Supply Rejection Ratio Input Bias Current Input Bias Current Power Supply Sensitivity Input Resistance ∆VPS = ±1.25V Input Noise Voltage Density (Note 4) f = 100kHz B 25 - 7 - nV/√Hz Input Noise Current Density (Note 4) f = 100kHz B 25 - 3.6 - pA/√Hz 2 HFA1212 VSUPPLY = ±5V, AV = +1, RL = 100Ω, Unless Otherwise Specified. (Continued) Electrical Specifications (NOTE 3) TEST LEVEL TEMP (oC) MIN TYP MAX UNITS A 25 -0.98 0.996 -1.02 V/V A Full 0.975 1.000 -1.025 V/V A 25 0.98 0.992 1.02 V/V A Full 0.975 0.993 1.025 V/V A 25 1.96 1.988 2.04 V/V A Full 1.95 1.990 2.05 V/V A 25 - - ±0.02 V/V A Full - - ±0.025 V/V A 25 - - ±0.025 V/V A Full - - ±0.025 V/V A 25 - - ±0.04 V/V A Full - - ±0.05 V/V AV = -1 B 25 - 300 - MHz AV = +1, +RS = 620Ω B 25 - 240 - MHz AV = +2 B 25 - 350 - MHz AV = -1 B 25 - 165 - MHz AV = +1, +RS = 620Ω B 25 - 150 - MHz AV = +2 B 25 - 125 - MHz Gain Flatness (VOUT = 0.2VP-P, Note 4) AV = +2, To 25MHz B 25 - ±0.03 - dB AV = +2, To 50MHz B 25 - ±0.04 - dB Crosstalk (All Channels Hostile, Note 4) 5MHz B 25 - -65 - dB 10MHz B 25 - -60 - dB Output Voltage Swing (Note 4) AV = -1 A 25 ±3.0 ±3.2 - V A Full ±2.8 ±3.0 - V Output Current (Note 4) AV = -1, RL = 50Ω A 25, 85 50 55 - mA TEST CONDITIONS PARAMETER TRANSFER CHARACTERISTICS Gain (VIN = -1V to +1V) AV = -1 AV = +1 AV = +2 Channel-to-Channel Gain Mismatch AV = -1 AV = +1 AV = +2 AC CHARACTERISTICS -3dB Bandwidth (VOUT = 0.2VP-P, Note 4) Full Power Bandwidth (VOUT = 5VP-P at AV = +2 or -1, VOUT = 4VP-P at AV = +1, Note 4) OUTPUT CHARACTERISTICS Output Short Circuit Current A -40 28 42 - mA B 25 - 100 - mA DC Closed Loop Output Impedance AV = +2 B 25 - 0.2 - Ω Second Harmonic Distortion (AV = +2, VOUT = 2VP-P, Note 4) 10MHz B 25 - -60 - dBc 20MHz B 25 - -50 - dBc Third Harmonic Distortion (AV = +2, VOUT = 2VP-P, Note 4) 10MHz B 25 - -60 - dBc 20MHz B 25 - -50 - dBc Reverse Isolation (S12, Note 4) 30MHz, AV = +2 B 25 - -65 - dB Rise Time B 25 - 1.0 - ns Fall Time B 25 - 1.1 - ns TRANSIENT RESPONSE AV = +2, Unless Otherwise Specified Rise and Fall Times (VOUT = 0.5VP-P) 3 HFA1212 VSUPPLY = ±5V, AV = +1, RL = 100Ω, Unless Otherwise Specified. (Continued) Electrical Specifications TEST CONDITIONS PARAMETER (NOTE 3) TEST LEVEL TEMP (oC) MIN TYP MAX UNITS Overshoot (VOUT = 0.5VP-P, VIN tRISE = 1ns, Note 5) +OS B 25 - 4 - % -OS B 25 - 13 - % Slew Rate (VOUT = 5VP-P at AV = +2 or -1, VOUT = 4VP-P at AV = +1) AV = -1 +SR B 25 - 2000 - V/µs -SR B 25 - 1150 - V/µs AV = +1, +RS = 620Ω +SR B 25 - 1100 - V/µs -SR B 25 - 850 - V/µs AV = +2 +SR B 25 - 1300 - V/µs -SR B 25 - 900 - V/µs To 0.1% B 25 - 24 - ns To 0.05% B 25 - 37 - ns To 0.02% B 25 - 60 - ns VIN = ±2V B 25 - 8.5 - ns Differential Gain (f = 3.58MHz, AV = +2) RL = 150Ω B 25 - 0.025 - % Differential Phase (f = 3.58MHz, AV = +2) RL = 150Ω B 25 - 0.03 - Degrees Power Supply Range C 25 ±4.5 - ±5.5 V Power Supply Current A 25 - 5.9 6.1 mA/Op Amp A Full - 6.1 6.3 mA/Op Amp Settling Time (VOUT = +2V to 0V Step, Note 4) Overdrive Recovery Time VIDEO CHARACTERISTICS POWER SUPPLY CHARACTERISTICS NOTES: 3. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only. 4. See Typical Performance Curves for more information. 5. Negative overshoot dominates for output signal swings below GND (e.g. 0.5VP-P), yielding a higher overshoot limit compared to the VOUT = 0V to 0.5V condition. See the “Application Information” section for details. Application Information HFA1212 Advantages The HFA1212 features a novel design which allows the user to select from three closed loop gains, without any external components. The result is a more flexible product, fewer part types in inventory, and more efficient use of board space. Implementing a dual, gain of 2, cable driver with this IC eliminates the four gain setting resistors, which frees up board space for termination resistors. Like most newer high performance amplifiers, the HFA1212 is a current feedback amplifier (CFA). CFAs offer high bandwidth and slew rate at low supply currents, but can be difficult to use because of their sensitivity to feedback capacitance and parasitics on the inverting input (summing node). The HFA1212 eliminates these concerns by bringing the gain setting resistors on-chip. This yields the optimum placement and value of the feedback resistor, while minimizing feedback and summing node parasitics. Because there is no access to the summing node, the PCB parasitics do not impact performance at gains of 4 +2 or -1 (see “Unity Gain Considerations” for discussion of parasitic impact on unity gain performance). The HFA1212’s closed loop gain implementation provides better gain accuracy, lower offset and output impedance, and better distortion compared with open loop buffers. Closed Loop Gain Selection This “buffer” operates in closed loop gains of -1, +1, or +2, with gain selection accomplished via connections to the inputs. Applying the input signal to +IN and floating -IN selects a gain of +1 (see next section for layout caveats), while grounding -IN selects a gain of +2. A gain of -1 is obtained by applying the input signal to -IN with +IN grounded through a 50Ω resistor. The table below summarizes these connections: CONNECTIONS GAIN (ACL) +INPUT -INPUT -1 50Ω to GND Input +1 Input NC (Floating) +2 Input GND HFA1212 Unity Gain Considerations Unity gain selection is accomplished by floating the -Input of the HFA1212. Anything that tends to short the -Input to GND, such as stray capacitance at high frequencies, will cause the amplifier gain to increase toward a gain of +2. The result is excessive high frequency peaking, and possible instability. Even the minimal amount of capacitance associated with attaching the -Input lead to the PCB results in approximately 6dB of gain peaking. At a minimum this requires due care to ensure the minimum capacitance at the -Input connection. Table 1 lists five alternate methods for configuring the HFA1212 as a unity gain buffer, and the corresponding performance. The implementations vary in complexity and involve performance trade-offs. The easiest approach to implement is simply shorting the two input pins together, and applying the input signal to this common node. The amplifier bandwidth decreases from 430MHz to 280MHz, but excellent gain flatness is the benefit. A drawback to this approach is that the amplifier input noise voltage and input offset voltage terms see a gain of +2, resulting in higher noise and output offset voltages. Alternately, a 100pF capacitor between the inputs shorts them only at high frequencies, which prevents the increased output offset voltage but delivers less gain flatness. An example of a good high frequency layout is the Evaluation Board shown in Figure 3. Driving Capacitive Loads Capacitive loads, such as an A/D input, or an improperly terminated transmission line will degrade the amplifier’s phase margin resulting in frequency response peaking and possible oscillations. In most cases, the oscillation can be avoided by placing a resistor (RS) in series with the output prior to the capacitance. Figure 1 details starting points for the selection of this resistor. The points on the curve indicate the RS and CL combinations for the optimum bandwidth, stability, and settling time, but experimental fine tuning is recommended. Picking a point above or to the right of the curve yields an overdamped response, while points below or left of the curve indicate areas of underdamped performance. RS and CL form a low pass network at the output, thus limiting system bandwidth well below the amplifier bandwidth of 350MHz. By decreasing RS as CL increases (as illustrated in the curves), the maximum bandwidth is obtained without sacrificing stability. In spite of this, bandwidth decreases as the load capacitance increases. Another straightforward approach is to add a 620Ω resistor in series with the amplifier’s positive input. This resistor and the HFA1212 input capacitance form a low pass filter which rolls off the signal bandwidth before gain peaking occurs. This configuration was employed to obtain the data sheet AC and transient parameters for a gain of +1. Remove -IN Pin Pulse Overshoot +RS = 620Ω PC Board Layout This amplifier’s frequency response depends greatly on the care taken in designing the PC board (PCB). The use of low inductance components such as chip resistors and chip capacitors is strongly recommended, while a solid ground plane is a must! Attention should be given to decoupling the power supplies. A large value (10µF) tantalum in parallel with a small value (0.1µF) chip capacitor works well in most cases. Terminated microstrip signal lines are recommended at the input and output of the device. Capacitance directly on the output must be minimized, or isolated as discussed in the next section. 5 PEAKING (dB) BW (MHz) ±0.1dB GAIN FLATNESS (MHz) 4.5 430 21 0 220 27 +RS = 620Ω and Remove -IN Pin 0.5 215 15 Short +IN to -IN (e.g., Pins 2 and 3) 0.6 280 70 100pF Capacitor Between +IN and -IN 0.7 290 40 APPROACH 50 SERIES OUTPUT RESISTANCE (Ω) The HFA1212 utilizes a quasi-complementary output stage to achieve high output current while minimizing quiescent supply current. In this approach, a composite device replaces the traditional PNP pulldown transistor. The composite device switches modes after crossing 0V, resulting in added distortion for signals swinging below ground, and an increased overshoot on the negative portion of the output waveform (see Figure 6, Figure 9, and Figure 12). This overshoot isn’t present for small bipolar signals (see Figure 4, Figure 7, and Figure 10) or large positive signals (see Figure 5, Figure 8 and Figure 11). TABLE 1. UNITY GAIN PERFORMANCE FOR VARIOUS IMPLEMENTATIONS 40 30 20 AV = +1 AV = +2 10 0 0 50 100 150 200 250 300 350 LOAD CAPACITANCE (pF) FIGURE 1. RECOMMENDED SERIES RESISTOR vs LOAD CAPACITANCE 400 HFA1212 Evaluation Board The performance of the HFA1212 may be evaluated using the HA5023 Evaluation Board, slightly modified as follows: 1. Remove the two feedback resistors, and leave the connections open. 2. a. For AV = +1 evaluation, remove the gain setting resistors (R1), and leave pins 2 and 6 floating. b. For AV = +2, replace the gain setting resistors (R1) with 0Ω resistors to GND. 3. Replace the 0Ω series output resistors with 50Ω. The modified schematic for amplifier 1, and the board layout are shown in Figures 2 and 3. FIGURE 3A. TOP LAYOUT To order evaluation boards (part number HA5023EVAL), please contact your local sales office. 50Ω OUT 1 R 1(NOTE) IN 2 3 50Ω − + 4 7 0.1µF 10µF 6 5 GND GND NOTE: R1 = ∞ (AV = +1) or 0Ω (AV = +2) −5V 10µF +5V 8 0.1µF FIGURE 2. MODIFIED EVALUATION BOARD SCHEMATIC FIGURE 3B. BOTTOM LAYOUT FIGURE 3. EVALUATION BOARD LAYOUT Typical Performance Curves 2.0 AV = +2 150 1.5 100 1.0 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (mV) 200 VSUPPLY = ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified 50 0 -50 -100 -150 AV = +2 0.5 0 -0.5 -1.0 -1.5 -200 -2.0 TIME (5ns/DIV.) FIGURE 4. SMALL SIGNAL PULSE RESPONSE 6 TIME (5ns/DIV.) FIGURE 5. LARGE SIGNAL POSITIVE PULSE RESPONSE HFA1212 Typical Performance Curves 200 AV = +2 1.5 150 1.0 100 OUTPUT VOLTAGE (mV) OUTPUT VOLTAGE (V) 2.0 (Continued) VSUPPLY = ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified 0.5 0 -0.5 -1.0 AV = +1 50 0 -50 -100 -150 -1.5 -200 -2.0 TIME (5ns/DIV.) TIME (5ns/DIV.) FIGURE 6. LARGE SIGNAL BIPOLAR PULSE RESPONSE 2.0 AV = +1 1.5 1.5 1.0 1.0 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 2.0 FIGURE 7. SMALL SIGNAL PULSE RESPONSE 0.5 0 -0.5 -1.0 -1.5 AV = +1 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.0 TIME (5ns/DIV.) FIGURE 8. TIME (5ns/DIV.) LARGE SIGNAL POSITIVE PULSE RESPONSE FIGURE 9. LARGE SIGNAL BIPOLAR PULSE RESPONSE 2.0 200 150 1.5 100 1.0 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (mV) AV = -1 50 0 -50 -100 0.5 0 -0.5 -1.0 -1.5 -150 -200 AV = −1 -2.0 TIME (5ns/DIV.) FIGURE 10. SMALL SIGNAL PULSE RESPONSE 7 TIME (5ns/DIV.) FIGURE 11. LARGE SIGNAL POSITIVE PULSE RESPONSE HFA1212 (Continued) VSUPPLY = ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified NORMALIZED GAIN (dB) 2.0 AV = -1 1.5 OUTPUT VOLTAGE (V) 1.0 0.5 0 6 3 AV = +2 GAIN 0 -3 AV = +1 -6 AV = -1 PHASE -9 0 -90 -0.5 -1.0 VOUT = 200mVP-P +RS = 620Ω (+1) +RS = 0Ω (-1, +2) -1.5 1 -2.0 6 0.7 3 0.6 0 0.5 AV = -1 AV = +2 AV = +1 -9 VOUT = 4VP-P (+1) VOUT = 5VP-P (-1, +2) +RS = 620Ω (+1) 100 0.3 AV = +2 0.2 0.1 0 -0.1 AV = +1 300 1 -10 -20 -20 -30 -30 GAIN (dB) CROSSTALK (dB) AV = -1 -50 AV = +1 -70 -80 AV = +2 RL = ∞ -40 -50 RL = 100Ω -60 -70 -80 -90 -90 AV = +2 -100 -110 0.3 100 FIGURE 15. GAIN FLATNESS -10 -60 AV = -1 10 FREQUENCY (MHz) FIGURE 14. FULL POWER BANDWIDTH -40 600 VOUT = 200mVP-P +RS = 620Ω (+1) +RS = 0Ω (-1, +2) -0.2 10 FREQUENCY (MHz) -360 0.4 -0.3 1 -270 FIGURE 13. FREQUENCY RESPONSE NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) FIGURE 12. LARGE SIGNAL BIPOLAR PULSE RESPONSE -6 AV = +2 10 100 FREQUENCY (MHz) TIME (5ns/DIV.) -3 -180 AV = +1 NORMALIZED PHASE (DEGREES) Typical Performance Curves 1 10 FREQUENCY (MHz) FIGURE 16. REVERSE ISOLATION 8 -100 100 -110 0.3 1 10 FREQUENCY (MHz) 100 FIGURE 17. ALL HOSTILE CROSSTALK 500 HFA1212 Typical Performance Curves (Continued) VSUPPLY = ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified -40 -40 -45 -45 DISTORTION (dBc) DISTORTION (dBc) 20MHz -50 -55 10MHz -60 -50 20MHz -55 -60 10MHz -65 -65 -70 -10 -5 0 5 10 -70 -10 15 -5 OUTPUT POWER (dBm) FIGURE 18. 2nd HARMONIC DISTORTION vs POUT 10 15 FIGURE 19. 3rd HARMONIC DISTORTION vs POUT 20 20 16 16 12 12 NOISE VOLTAGE (nV/√Hz) 0.05 0 -0.05 -0.10 8 8 ENI 4 4 I NI 13 33 53 73 93 113 TIME (ns) 133 153 0 0.1 173 FIGURE 20. SETTLING RESPONSE 1 10 FREQUENCY (kHz) FIGURE 21. INPUT NOISE CHARACTERISTICS 3.6 OUTPUT VOLTAGE (V) 3.5 |-VOUT| (RL= 100Ω) AV = -1 +VOUT (RL= 100Ω) 3.4 3.3 3.2 |-VOUT| (RL= 50Ω) 3.1 +VOUT (RL= 50Ω) 3.0 2.9 2.8 2.7 2.6 -50 -25 0 25 50 75 100 TEMPERATURE (oC) FIGURE 22. OUTPUT VOLTAGE vs TEMPERATURE 9 0 100 125 NOISE CURRENT (pA/√Hz) AV = +1 0.10 SETTLING ERROR (%) 0 5 OUTPUT POWER (dBm) HFA1212 Die Characteristics DIE DIMENSIONS: PASSIVATION: 69 mils x 92 mils x 19 mils 1750µm x 2330µm x 483µm Type: Nitride Thickness: 4kÅ ±0.5kÅ METALLIZATION: TRANSISTOR COUNT: Type: Metal 1: AICu(2%)/TiW Thickness: Metal 1: 8kÅ ±0.4kÅ 180 SUBSTRATE POTENTIAL (Powered Up): Type: Metal 2: AICu(2%) Thickness: Metal 2: 16kÅ ±0.8kÅ Floating (Recommend Connection to V-) Metallization Mask Layout HFA1212 OUT1 -IN1 NC V+ NC OUT2 +IN1 NC NC -IN2 NC V- NC +IN2 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 http://www.intersil.com 10