HA-2544_04

® UCT PROD ENT OLETE REPLACEM r at OBS ent e DED por t C c MMEN RECOSheet nical Sup ersil.com/ts NO Data r Tech w.int ou w t contac TERSIL or w 888-IN 1- HA-2544 July 2004 FN2900.6 50MHz, Video Operational Amplifier The HA-2544 is a fast, unity gain stable, monolithic op amp designed to meet the needs required for accurate reproduction of video or high speed signals. It offers high voltage gain (6kV/V) and high phase margin (65 degrees) while maintaining tight gain flatness over the video bandwidth. Built from high quality Dielectric Isolation, the HA-2544 is another addition to the Intersil series of high speed, wideband op amps, and offers true video performance combined with the versatility of an op amp. The primary features of the HA-2544 include 50MHz Gain Bandwidth, 150V/µs slew rate, 0.03% differential gain error and gain flatness of just 0.12dB at 10MHz. High performance and low power requirements are met with a supply current of only 10mA. Uses of the HA-2544 range from video test equipment, guidance systems, radar displays and other precise imaging systems where stringent gain and phase requirements have previously been met with costly hybrids and discrete circuitry. The HA-2544 will also be used in non-video systems requiring high speed signal conditioning such as data acquisition systems, medical electronics, specialized instrumentation and communication systems. Military (/883) product and data sheets are available upon request. Features • Gain Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . 50MHz • High Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . 150V/µs • Low Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . 10mA • Differential Gain Error . . . . . . . . . . . . . . . . . . . . . . 0.03% • Differential Phase Error . . . . . . . . . . . . . . . . 0.03 Degrees • Gain Flatness at 10MHz. . . . . . . . . . . . . . . . . . . . . 0.12dB Applications • Video Systems • Video Test Equipment • Radar Displays • Data Acquisition Systems • Imaging Systems • Pulse Amplifiers • Signal Conditioning Circuits Pinout HA-2544C (PDIP) TOP VIEW BAL -IN +IN V- 1 2 3 4 8 7 6 5 NC V+ OUT BAL + Part # Information PART NUMBER (BRAND) HA3-2544C-5 TEMP. RANGE (oC) 0 to 75 PACKAGE 8 Ld PDIP PKG. DWG. # E8.3 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2003, 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners. HA-2544 Absolute Maximum Ratings Voltage Between V+ and V- Terminals . . . . . . . . . . . . . . . . . . . 35V Differential Input Voltage (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . 6V Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±40mA Thermal Information Thermal Resistance (Typical, Note 2) θJA (oC/W) θJC (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . 110 N/A Maximum Junction Temperature (Plastic Packages) . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC Operating Conditions Temperature Range HA-2544C-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC 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. To achieve optimum AC performance, the input stage was designed without protective diode clamps. Exceeding the maximum differential input voltage results in reverse breakdown of the base-emitter junction of the input transistors and probable degradation of the input parameters especially VOS, IOS and Noise. 2. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications PARAMETER INPUT CHARACTERISTICS Offset Voltage VSUPPLY = ±15V, CL ≤10pF, RL = 1kΩ , Unless Otherwise Specified TEST CONDITIONS TEMP (oC) MIN TYP MAX UNITS - 25 -2, -5 -9 Full 25 Full Full 25 Full Full Full 25 25 25 25 25 25 ±10 50 - 15 10 9 0.04 0.8 10 ±11.5 90 3 20 2.4 1.5 4.6 25 40 40 18 30 2 3 - mV mV mV µV/oC µA µA µA/oC µA µA nA/oC V kΩ pF nV/√Hz pA/√Hz µVP-P µVRMS Average Offset Voltage Drift (Note 7) Bias Current - Average Bias Current Drift (Note 7) Offset Current - Offset Current Drift Common Mode Range Differential Input Resistance Differential Input Capacitance Input Noise Voltage Input Noise Current Input Noise Voltage (Note 7) f = 1kHz f = 1kHz 0.1Hz to 10Hz 0.1Hz to 1MHz TRANSFER CHARACTERISTICS Large Signal Voltage Gain (Note 7) VO = ±5V 25 Full Common Mode Rejection Ratio (Note 7) ∆VCM = ±10V -2, -5 -9 Minimum Stable Gain Unity Gain Bandwidth (Note 7) Gain Bandwidth Product (Note 7) Phase Margin VO = ±100mV VO = ±100mV 25 25 25 25 3 2 70 65 +1 6 89 89 45 50 65 kV/V kV/V dB dB V/V MHz MHz Degrees 2 HA-2544 Electrical Specifications PARAMETER OUTPUT CHARACTERISTICS Output Voltage Swing Full Power Bandwidth (Note 6) Peak Output Current (Note 7) Continuous Output Current (Note 7) Output Resistance TRANSIENT RESPONSE Rise Time (Note 4) Overshoot (Note 4) Slew Rate Settling Time (Note 5) VIDEO PARAMETERS RL = 1kΩ (Note 8) Differential Phase (Note 9) Differential Gain (Notes 3, 9) 25 25 25 Gain Flatness 5MHz 10MHz Chrominance to Luminance Gain (Note 10) Chrominance to Luminance Delay (Note 10) POWER SUPPLY CHARACTERISTICS Supply Current Power Supply Rejection Ratio (Note 7) VS = ±10V to ±20V Full -2, -5 -9 NOTES: 3. A D (%) = 10 A ( dB ) D -------------------20 VSUPPLY = ±15V, CL ≤10pF, RL = 1kΩ , Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP (oC) MIN TYP MAX UNITS Full 25 25 25 Open Loop 25 ±10 3.2 ±25 ±10 - ±11 4.2 ±35 20 - V MHz mA mA Ω 25 25 25 25 100 - 7 10 150 120 - ns % V/µs ns - 0.03 0.0026 0.03 0.10 0.12 0.1 7 - Degree dB % dB dB dB ns 25 25 25 25 70 65 10 80 80 15 - mA dB dB – 1 × 100 . 4. For Rise Time and Overshoot testing, VOUT is measured from 0 to +200mV and 0 to -200mV. 5. Settling Time is specified to 0.1% of final value for a 10V step and AV = -1. Slew Rate 6. Full Power Bandwidth is guaranteed by equation: Full Power Bandwidth = ---------------------------- ( V = 5V ) . 2 π V PEAK PEAK 7. Refer to typical performance curve in Data Sheet. 8. The video parameter specifications will degrade as the output load resistance decreases. 9. Tested with a VM700A video tester, using a NTC-7 Composite input signal. For adequate test repeatability, a minimum warm-up of 2 minutes is suggested. AV = +1. 10. C-L Gain and C-L Delay was less than the resolution of the test equipment used which is 0.1dB and 7ns, respectively. 3 HA-2544 Test Circuits and Waveforms NOTES: V+ RS VIN + 11. VS = ±15V. 12. AV = +1. VOUT CL RL - 13. RS = 50Ω or 75Ω (Optional). 14. RL = 1kΩ. 15. CL < 10pF. 16. VIN for Large Signal = ±5V. 17. VIN for Small Signal = 0 to +200mV and 0 to -200mV. V- FIGURE 1. TRANSIENT RESPONSE VIN VIN VOUT VOUT VOUT = 0 to +10V Vertical Scale: VIN = 5V/Div.; VOUT = 2V/Div. Horizontal Scale: 100ns/Div. LARGE SIGNAL RESPONSE VOUT = 0 to +200mV Vertical Scale: VIN = 100mV/Div.; VOUT = 100mV/Div. Horizontal Scale: 100ns/Div. SMALL SIGNAL RESPONSE SETTLING POINT BAL 1 2 3 4 8 7 6 5 NC V+ OUT 5kΩ 5kΩ 2kΩ -IN +IN V- + 2kΩ VIN + VOUT RT BAL NOTES: 18. AV = -1. 19. Feedback and summing resistor ratios should be 0.1% matched. 20. HP5082-2810 clipping diodes recommended. 21. Tektronix P6201 FET probe used at settling point. FIGURE 2. SETTLING TIME TEST CIRCUIT FIGURE 3. OFFSET VOLTAGE ADJUSTMENT NOTE: Tested offset adjustment range is |VOS + 1mV| minimum referred to output. Typical range for RT = 20kΩ is approximately ±30mV. 4 HA-2544 Schematic Diagram V+ R1 QP24 R2A QP23 VR7 QP20 QN21 R28 R9 QP19 R36 QP33 D34 D37 QP44 QN43 D38 D39 D40 R10 V+ QN18 R11 QP16 QN17 R13 QP15 R14 V+ QN14 QN13 R15 R16 QN55 5kΩ R38 BAL QN60 5kΩ R39 BAL QN11 QN12 QN48 R31 VR12 QN59 QN9 QN10 D41 QP52 R24 200Ω VQN51 +INPUT QN1 QN2 R25 200Ω -INPUT R30 R35 QN53 R32 36Ω OUTPUT R33 36Ω QP54 QN22 R8 QN36 C1 QN50 QP5 QP57 QP58 R2 R4 QP6 R37 QP32 QN46 R17 R18 Application Information The HA-2544 is a true differential op amp that is as versatile as any op amp but offers the advantages of high unity gain bandwidth, high speed and low supply current. More important than its general purpose applications is that the HA-2544 was especially designed to meet the requirements found in a video amplifier system. These requirements include fine picture resolution and accurate color rendition, and must meet broadcast quality standards. In a video signal, the video information is carried in the amplitude and phase as well as in the DC level. The amplifier must pass the 30Hz line rate Iuminance level and the 3.58MHz 5 (NTSC) or 4.43MHz (PAL) color band without altering phase or gain. The HA-2544’s key specifications aimed at meeting this include high bandwidth (50MHz), very low gain flatness (0.12dB at 10MHz), near unmeasurable differential gain and differential phase (0.03% and 0.03 degrees), and low noise (20nV/√Hz). The HA-2544 meets these guidelines. The HA-2544 also offers the advantage of a full output voltage swing of ±10V into a 1kΩ load. This equates to a full power bandwidth of 2.4MHz for this ±10V signal. If video signal levels of ±2V maximum is used (with RL = 1kΩ), the full power bandwidth would be 11.9MHz without clipping distortion. HA-2544 Another usage might be required for a direct 50Ω or 75Ω load where the HA-2544 will still swing this ±2V signal as shown in the above display. One important note that must be realized is that as load resistance decreases the video parameters are also degraded. For optimal video performance a 1kΩ load is recommended. If lower supply voltages are required, such as ±5V, many of the characterization curves indicate where the parameters vary. As shown the bandwidth, slew rate and supply current are still very well maintained. resistor (20Ω to 100Ω) before the capacitance effectively decouples this effect. Stability/Phase Margin/Compensation The HA-2544 has not sacrificed unity gain stability in achieving its superb AC performance. For this device, the phase margin exceeds 60 degrees at the unity crossing point of the open loop frequency response. Large phase margin is critical in order to reduce the differential phase and differential gain errors caused by most other op amps. Because this part is unity gain stable, no compensation pin is brought out. If compensation is desired to reduce the noise bandwidth, most standard methods may be used. One method suggested for an inverting scheme would be a series R-C from the inverting node to ground which will reduce bandwidth, but not effect slew rate. If the user wishes to achieve even higher bandwidth (>50MHz), and can tolerate some slight gain peaking and lower phase margin, experimenting with various load capacitance can be done. Shown in Application 1 is an excellent Differential Input, Unity Gain Buffer which also will terminate a cable to 75Ω and reject common mode voltages. Application 2 is a method of separating a video signal up into the Sync only signal and the Video and Blanking signal. Application 3 shows the HA-2544 being used as a 100kHz High Pass 2-Pole Butterworth Filter. Also shown is the measured frequency response curves. Prototyping and PC Board Layout When designing with the HA-2544 video op amp as with any high performance device, care should be taken to use high frequency layout techniques to avoid unwanted parasitic effects. Short lead lengths, low source impedance and lower value feedback resistors help reduce unwanted poles or zeros. This layout would also include ground plane construction and power supply decoupling as close to the supply pins with suggested parallel capacitors of 0.1µF and 0.001µF ceramic to ground. In the noninverting configuration, the amplifier is sensitive to stray capacitance (