HFA1100, HFA1120 Data Sheet May 1999 850MHz, Low Distortion Current Feedback Operational Amplifiers • Low Distortion (30MHz, HD2). . . . . . . . . . . . . . . . . -56dBc • -3dB Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . 850MHz • Very Fast Slew Rate . . . . . . . . . . . . . . . . . . . . . . 2300V/µs • Fast Settling Time (0.1%) . . . . . . . . . . . . . . . . . . . . . 11ns • Excellent Gain Flatness - (100MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.14dB - (50MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.04dB The HFA1100 is a basic op amp with uncommitted pins 1, 5, and 8. The HFA1120 includes inverting input bias current adjust pins (pins 1 and 5) for adjusting the output offset voltage. • High Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 60mA • Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . . <10ns These devices offer a significant performance improvement over the AD811, AD9617/18, the CLC400-409, and the EL2070, EL2073, EL2030. • Operates with 5V Single Supply (See AN9745) Applications For Military grade product refer to the HFA1100/883, HFA1120/883 data sheet. • Video Switching and Routing • Pulse and Video Amplifiers Ordering Information TEMP. RANGE (oC) • RF/IF Signal Processing PACKAGE PKG. NO. • Flash A/D Driver HFA1100IP -40 to 85 8 Ld PDIP E8.3 • Medical Imaging Systems HFA1100IB (H1100I) -40 to 85 8 Ld SOIC M8.15 HFA1120IB (H1120I) -40 to 85 8 Ld SOIC M8.15 • Related Literature - AN9420, Current Feedback Theory - AN9202, HFA11XX Evaluation Fixture - AN9745, Single 5V Supply Operation HFA11XXEVAL 2945.7 Features The HFA1100, 1120 are a family of high-speed, wideband, fast settling current feedback amplifiers built with Intersil's proprietary complementary bipolar UHF-1 process. Both amplifiers operate with single supply voltages as low as 4.5V (see Application Information section). PART NUMBER (BRAND) File Number DIP Evaluation Board for High-Speed Op Amps Pinouts The Op Amps with Fastest Edges HFA1100 (PDIP, SOIC) TOP VIEW INPUT 220MHz SIGNAL OUTPUT (AV = 2) HFA1130 OP AMP 0ns NC 1 -IN 2 +IN 3 V- 4 NC - 7 V+ + 6 OUT 5 NC HFA1120 (SOIC) TOP VIEW 25ns BAL 1 -IN 2 - 7 V+ 3 + 6 OUT +IN V- 4 1 8 8 NC 5 BAL 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 HFA1100, HFA1120 Absolute Maximum Ratings TA = 25oC Thermal Information Thermal Resistance (Typical, Note 1) θJA (oC/W) θJC (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . 130 N/A SOIC Package . . . . . . . . . . . . . . . . . . . 170 N/A Maximum Junction Temperature (Plastic Package) . . . . . . . . .150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only) Voltage Between V+ and V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Output Current (50% Duty Cycle) . . . . . . . . . . . . . . . . . . . . . . 60mA 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. NOTE: 1. θJA is measured with the component mounted on an evaluation PC board in free air. VSUPPLY = ±5V, AV = +1, RF = 510Ω, RL = 100Ω, Unless Otherwise Specified Electrical Specifications (NOTE 2) TEST LEVEL TEMP. (oC) MIN TYP MAX UNITS A 25 - 2 6 mV A Full - - 10 mV C Full - 10 - µV/oC A 25 40 46 - dB A Full 38 - - dB A 25 45 50 - dB A Full 42 - - dB A 25 - 25 40 µA A Full - - 65 µA C Full - 40 - nA/oC A 25 - 20 40 µA/V A Full - - 50 µA/V A 25 - 12 50 µA A Full - - 60 µA C Full - 40 - nA/oC A 25 - 1 7 µA/V A Full - - 10 µA/V A 25 - 6 15 µA/V A Full - - 27 µA/V -IBIAS Adj. Range (HFA1120) A 25 ±100 ±200 - µA Non-Inverting Input Resistance A 25 25 50 - kΩ Inverting Input Resistance C 25 - 20 30 Ω Input Capacitance (Either Input) B 25 - 2 - pF Input Common Mode Range C Full ±2.5 ±3.0 - V TEST CONDITIONS PARAMETER INPUT CHARACTERISTICS Input Offset Voltage (Note 3) Input Offset Voltage Drift ∆VCM = ±2V VIO CMRR ∆VS = ±1.25V VIO PSRR Non-Inverting Input Bias Current (Note 3) +IN = 0V +IBIAS Drift ∆VCM = ±2V +IBIAS CMS Inverting Input Bias Current (Note 3) -IN = 0V -IBIAS Drift ∆VCM = ±2V -IBIAS CMS ∆VS = ±1.25V -IBIAS PSS Input Noise Voltage (Note 3) 100kHz B 25 - 4 - nV/√Hz +Input Noise Current (Note 3) 100kHz B 25 - 18 - pA/√Hz -Input Noise Current (Note 3) 100kHz B 25 - 21 - pA/√Hz 2 HFA1100, HFA1120 VSUPPLY = ±5V, AV = +1, RF = 510Ω, RL = 100Ω, Unless Otherwise Specified (Continued) Electrical Specifications TEST CONDITIONS PARAMETER TRANSFER CHARACTERISTICS (NOTE 2) TEST LEVEL TEMP. (oC) MIN TYP MAX UNITS B 25 - 300 - kΩ AV = +2, Unless Otherwise Specified Open Loop Transimpedance (Note 3) -3dB Bandwidth (Note 3) VOUT = 0.2VP-P, AV = +1 B 25 530 850 - MHz -3dB Bandwidth VOUT = 0.2VP-P, AV = +2, RF = 360Ω B 25 - 670 - MHz Full Power Bandwidth VOUT = 4VP-P, AV = -1 B 25 - 300 - MHz Gain Flatness (Note 3) To 100MHz B 25 - ±0.14 - dB Gain Flatness To 50MHz B 25 - ±0.04 - dB Gain Flatness To 30MHz B 25 - ±0.01 - dB Linear Phase Deviation (Note 3) DC to 100MHz B 25 - 0.6 - Degrees Differential Gain NTSC, RL = 75Ω B 25 - 0.03 - % Differential Phase NTSC, RL = 75Ω B 25 - 0.05 - Degrees A Full 1 - - V/V A 25 ±3.0 ±3.3 - V A Full ±2.5 ±3.0 - V A 25, 85 50 60 - mA A -40 35 50 - mA B 25 - 0.07 - Ω Minimum Stable Gain OUTPUT CHARACTERISTICS AV = +2, Unless Otherwise Specified AV = -1 Output Voltage (Note 3) RL = 50Ω, AV = -1 Output Current DC Closed Loop Output Impedance (Note 3) 2nd Harmonic Distortion (Note 3) 30MHz, VOUT = 2VP-P B 25 - -56 - dBc 3rd Harmonic Distortion (Note 3) 30MHz, VOUT = 2VP-P B 25 - -80 - dBc 3rd Order Intercept (Note 3) 100MHz B 25 20 30 - dBm 1dB Compression 100MHz B 25 15 20 - dBm TRANSIENT RESPONSE AV = +2, Unless Otherwise Specified Rise Time VOUT = 2.0V Step B 25 - 900 - ps Overshoot (Note 3) VOUT = 2.0V Step B 25 - 10 - % Slew Rate AV = +1, VOUT = 5VP-P B 25 - 1400 - V/µs Slew Rate AV = +2, VOUT = 5VP-P B 25 1850 2300 - V/µs 0.1% Settling (Note 3) VOUT = 2V to 0V B 25 - 11 - ns 0.2% Settling (Note 3) VOUT = 2V to 0V B 25 - 7 - ns Overdrive Recovery Time 2X Overdrive B 25 - 7.5 10 ns Supply Voltage Range B Full ±4.5 - ±5.5 V Supply Current (Note 3) A 25 - 21 26 mA A Full - - 33 mA POWER SUPPLY CHARACTERISTICS NOTES: 2. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only. 3. See Typical Performance Curves for more information. 3 HFA1100, HFA1120 Application Information PARAMETER Optimum Feedback Resistor (RF) The enclosed plots of inverting and non-inverting frequency response detail the performance of the HFA1100/1120 in various gains. Although the bandwidth dependency on ACL isn’t as severe as that of a voltage feedback amplifier, there is an appreciable decrease in bandwidth at higher gains. This decrease can be minimized by taking advantage of the current feedback amplifier’s unique relationship between bandwidth and RF. All current feedback amplifiers require a feedback resistor, even for unity gain applications, and the RF, in conjunction with the internal compensation capacitor, sets the dominant pole of the frequency response. Thus, the amplifier’s bandwidth is inversely proportional to RF. The HFA1100, 1120 designs are optimized for a 510Ω RF, at a gain of +1. Decreasing RF in a unity gain application decreases stability, resulting in excessive peaking and overshoot (Note: Capacitive feedback causes the same problems due to the feedback impedance decrease at higher frequencies). At higher gains the amplifier is more stable, so RF can be decreased in a trade-off of stability for bandwidth. The table below lists recommended RF values for various gains, and the expected bandwidth. ACL RF (Ω) BW (MHz) +1 510 850 -1 430 580 +2 360 670 +5 150 520 +10 180 240 +19 270 125 Offset Adjustment The HFA1120 allows for adjustment of the inverting input bias current to null the output offset voltage. -IBIAS flows through RF, so any change in bias current forces a corresponding change in output voltage. The amount of adjustment is a function of RF. With RF = 510Ω, the typical adjust range is ±100mV. For offset adjustment connect a 10kΩ potentiometer between pins 1 and 5 with the wiper connected to V-. 5V Single Supply Operation These amplifiers will operate at single supply voltages down to 4.5V. The table below details the amplifier’s performance with a single 5V supply. The dramatic supply current reduction at this operating condition (refer also to Figure 23) makes these op amps even better choices for low power 5V systems. Refer to Application Note AN9745 for further information. 4 TYP Input Common Mode Range 1V to 4V -3dB BW (AV = +2) 267MHz Gain Flatness (to 50MHz, AV = +2) 0.05dB Output Voltage (AV = -1) 1.3V to 3.8V Slew Rate (AV = +2) 475V/µs 0.1% Settling Time 17ns Supply Current 5.5mA Use of Die in Hybrid Applications These amplifiers are designed with compensation to negate the package parasitics that typically lead to instabilities. As a result, the use of die in hybrid applications results in overcompensated performance due to lower parasitic capacitances. Reducing RF below the recommended values for packaged units will solve the problem. For AV = +2 the recommended starting point is 300Ω, while unity gain applications should try 400Ω. PC Board Layout The frequency performance of these amplifiers depends a great deal on the amount of care taken in designing the PC board. 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 chip (0.1µF) capacitor works well in most cases. Terminated microstrip signal lines are recommended at the input and output of the device. Output capacitance, such as that resulting from an improperly terminated transmission line will degrade the frequency response of the amplifier and may cause oscillations. In most cases, the oscillation can be avoided by placing a resistor in series with the output. Care must also be taken to minimize the capacitance to ground seen by the amplifier’s inverting input. The larger this capacitance, the worse the gain peaking, resulting in pulse overshoot and possible instability. To this end, it is recommended that the ground plane be removed under traces connected to pin 2, and connections to pin 2 should be kept as short as possible. An example of a good high frequency layout is the Evaluation Board shown below. Evaluation Board An evaluation board is available for the HFA1100 (Part Number HFA11XXEVAL). Please contact your local sales office for information. HFA1100, HFA1120 The layout and schematic of the board are shown below: 500Ω 500Ω 50Ω VH 1 8 2 7 0.1µF 10µF +5V 50Ω IN 10µF 3 6 4 5 OUT VL 0.1µF GND GND -5V TOP LAYOUT BOTTOM LAYOUT VH 1 +IN VL OUT V+ VGND Typical Performance Curves AV = +2 1.2 90 AV = +2 0.9 OUTPUT VOLTAGE (V) 60 30 0 -30 -60 0.6 0.3 0 -0.3 -0.6 -90 -0.9 -120 -1.2 TIME (5ns/DIV.) TIME (5ns/DIV.) NORMALIZED GAIN (dB) FIGURE 2. LARGE SIGNAL PULSE VOUT = 200mVP-P 0 GAIN -3 AV = +1 -6 AV = +2 -9 AV = +6 AV = +11 -12 PHASE 0 AV = +1 AV = +2 -180 AV = +6 -270 AV = +11 0.3 1 -90 10 100 FREQUENCY (MHz) -360 1K FIGURE 3. NON-INVERTING FREQUENCY RESPONSE 5 VOUT = 200mVP-P 0 GAIN -3 AV = -1 -6 AV = -5 AV = -10 -9 AV = -20 -12 PHASE (DEGREES) NORMALIZED GAIN (dB) FIGURE 1. SMALL SIGNAL PULSE PHASE 180 AV = -1 90 AV = -5 0 AV = -10 AV = -20 0.3 1 10 100 FREQUENCY (MHz) -90 -180 1K FIGURE 4. INVERTING FREQUENCY RESPONSE PHASE (DEGREES) OUTPUT VOLTAGE (mV) 120 VSUPPLY = ±5V, RF = 510Ω, TA = 25oC, RL = 100Ω, Unless Otherwise Specified HFA1100, HFA1120 RL = 1kΩ 3 GAIN 0 -3 -6 RL = 50Ω RL = 100Ω PHASE 0 -90 RL = 1kΩ -180 RL = 100Ω -270 RL = 1kΩ 0.3 1 10 100 FREQUENCY (MHz) 1K -360 PHASE (DEGREES) RL = 100Ω RL = 50Ω GAIN (dB) 10 0 0.160VP-P 0.500VP-P 0.920VP-P 1.63VP-P -20 -30 0.3 1 10 100 FREQUENCY (MHz) RL = 100Ω RL = 50Ω -6 PHASE RL = 50Ω RL = 100Ω 20 0 -90 RL = 1kΩ -180 -270 1 -360 10 100 FREQUENCY (MHz) 1K AV = +2 10 0 0.32VP-P -10 1.00VP-P -20 1.84VP-P -30 0.3 3.26VP-P 1 10 100 FREQUENCY (MHz) 1K FIGURE 8. FREQUENCY RESPONSE FOR VARIOUS OUTPUT VOLTAGES AV = +1 AV = +6 10 950 0 -10 BANDWIDTH (MHz) NORMALIZED GAIN (dB) -3 FIGURE 6. FREQUENCY RESPONSE FOR VARIOUS LOAD RESISTORS 1K FIGURE 7. FREQUENCY RESPONSE FOR VARIOUS OUTPUT VOLTAGES 20 GAIN 0 RL = 100Ω RL = 1kΩ NORMALIZED GAIN (dB) AV = +1 -10 RL = 1kΩ 3 0.3 FIGURE 5. FREQUENCY RESPONSE FOR VARIOUS LOAD RESISTORS 20 AV = +2, VOUT = 200mVP-P 0.96VP-P TO 3.89VP-P -20 -30 900 850 800 750 700 0.3 1 10 100 FREQUENCY (MHz) 1K FIGURE 9. FREQUENCY RESPONSE FOR VARIOUS OUTPUT VOLTAGES 6 PHASE (DEGREES) AV = +1, VOUT = 200mVP-P 6 GAIN (dB) VSUPPLY = ±5V, RF = 510Ω, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued) NORMALIZED GAIN (dB) Typical Performance Curves -50 -25 0 25 50 75 100 125 TEMPERATURE (oC) FIGURE 10. -3dB BANDWIDTH vs TEMPERATURE HFA1100, HFA1120 Typical Performance Curves VSUPPLY = ±5V, RF = 510Ω, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued) 25 0 2.5 180 135 PHASE 0.25 90 45 0 0.01 0.1 1 10 FREQUENCY (MHz) 100 GAIN (dB) GAIN PHASE (DEGREES) GAIN (kΩ) AV = +2 AV = -1 250 -0.05 -0.10 -0.15 -0.20 500 1 10 FREQUENCY (MHz) FIGURE 11. OPEN LOOP TRANSIMPEDANCE FIGURE 12. GAIN FLATNESS AV = +2, VOUT = 2V AV = +2 2.0 0.6 SETTLING ERROR (%) 1.5 DEVIATION (DEGREES) 100 1.0 0.5 0 -0.5 -1.0 -1.5 0.4 0.2 0 -0.2 -0.4 -0.6 -2.0 0 15 30 45 60 75 90 105 120 FREQUENCY (MHz) 135 150 -4 FIGURE 13. DEVIATION FROM LINEAR PHASE 1 6 11 16 21 26 TIME (ns) 31 36 41 46 FIGURE 14. SETTLING RESPONSE 40 2-TONE 35 INTERCEPT POINT (dBm) OUTPUT RESISTANCE (Ω) 1000 100 10 1 30 25 20 15 10 5 0.1 0 0.3 1 10 100 FREQUENCY (MHz) 1000 FIGURE 15. CLOSED LOOP OUTPUT RESISTANCE 7 0 100 200 300 FREQUENCY (MHz) 400 FIGURE 16. 3rd ORDER INTERMODULATION INTERCEPT HFA1100, HFA1120 VSUPPLY = ±5V, RF = 510Ω, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued) -30 -30 -35 -40 -40 DISTORTION (dBc) DISTORTION (dBc) Typical Performance Curves 100MHz -45 50MHz -50 -55 -60 -50 100MHz -60 -70 -90 30MHz -110 -70 -5 -3 -1 1 3 5 7 9 OUTPUT POWER (dBm) 11 13 -5 15 -3 -1 3 5 7 9 11 13 15 FIGURE 18. 3rd HARMONIC DISTORTION vs POUT 35 RF = 360Ω VOUT = 2VP-P AV = +1 30 AV = +2 OVERSHOOT (%) VOUT = 1VP-P VOUT = 0.5VP-P VOUT = 2VP-P 25 RF = 360Ω VOUT = 1VP-P RF = 360Ω 20 VOUT = 0.5VP-P 15 10 5 RF = 510Ω VOUT = 2VP-P RF = 510Ω VOUT = 1VP-P RF = 510Ω VOUT = 0.5VP-P 0 100 200 300 400 500 600 700 800 100 900 1000 200 300 FIGURE 19. OVERSHOOT vs INPUT RISE TIME 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 400 500 600 700 800 900 1000 INPUT RISE TIME (ps) INPUT RISE TIME (ps) FIGURE 20. OVERSHOOT vs INPUT RISE TIME 25 AV = +2, tR = 200ps, VOUT = 2VP-P 24 SUPPLY CURRENT (mA) OVERSHOOT (%) 1 OUTPUT POWER (dBm) FIGURE 17. 2nd HARMONIC DISTORTION vs POUT OVERSHOOT (%) 30MHz -100 -65 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 50MHz -80 23 22 21 20 19 18 360 400 440 480 560 600 520 FEEDBACK RESISTOR (Ω) 640 680 FIGURE 21. OVERSHOOT vs FEEDBACK RESISTOR 8 -60 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (oC) FIGURE 22. SUPPLY CURRENT vs TEMPERATURE HFA1100, HFA1120 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 6 5 7 8 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 +IBIAS VIO -IBIAS -60 10 9 45 42 39 36 33 30 27 24 21 18 15 12 9 6 3 0 -40 -20 0 20 40 60 80 BIAS CURRENTS (µA) VSUPPLY = ±5V, RF = 510Ω, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued) INPUT OFFSET VOLTAGE (mV) SUPPLY CURRENT (mA) Typical Performance Curves 100 120 TEMPERATURE (oC) TOTAL SUPPLY VOLTAGE (V+ - V-, V) FIGURE 23. SUPPLY CURRENT vs SUPPLY VOLTAGE FIGURE 24. VIO AND BIAS CURRENTS vs TEMPERATURE 3.7 30 AV = -1, RL = 50Ω +VOUT 3.3 3.2 | - VOUT | 3.1 3 2.9 2.8 2.7 25 250 225 20 200 175 15 150 125 10 100 75 5 Eeni NI IiniNI Iini+ NI+ 2.6 2.5 -60 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (oC) FIGURE 25. OUTPUT VOLTAGE vs TEMPERATURE 9 0 100 1K 10K 100K FREQUENCY (Hz) FIGURE 26. INPUT NOISE vs FREQUENCY 50 25 0 CURRENT NOISE (pA/√Hz) 3.4 300 275 3.5 VOLTAGE NOISE (nV/√Hz) OUTPUT VOLTAGE (V) 3.6 HFA1100, HFA1120 Die Characteristics DIE DIMENSIONS: PASSIVATION: 63 mils x 44 mils x 19 mils 1600µm x 1130µm Type: Nitride Thickness: 4kÅ ±0.5kÅ TRANSISTOR COUNT: METALLIZATION: 52 Type: Metal 1: AlCu (2%)/TiW Thickness: Metal 1: 8kÅ ±0.4kÅ Type: Metal 2: AlCu (2%) Thickness: Metal 2: 16kÅ ±0.8kÅ SUBSTRATE POTENTIAL (POWERED UP): Floating (Recommend Connection to V-) Metallization Mask Layout HFA1100, HFA1120 +IN -IN V- BAL VL VH BAL V+ OUT 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