a FEATURES Low Cost Single (AD8051), Dual (AD8052) and Quad (AD8054) Voltage Feedback Architecture Fully Specified at +3 V, +5 V and ⴞ5 V Supplies Single Supply Operation Output Swings to Within 25 mV of Either Rail Input Voltage Range: –0.2 V to +4 V; VS = +5 V High Speed and Fast Settling on +5 V: 110 MHz –3 dB Bandwidth (G = +1) (AD8051/AD8052) 150 MHz –3 dB Bandwidth (G = +1) (AD8054) 145 V/s Slew Rate 50 ns Settling Time to 0.1% Small Packaging AD8051 Available in SOT-23-5 AD8052 Available in SOIC-8 AD8054 Available in TSSOP-14 Good Video Specifications (G = +2) Gain Flatness of 0.1 dB to 20 MHz; RL = 150 ⍀ 0.03% Differential Gain Error; RL = 1K 0.03ⴗ Differential Phase Error; R L = 1K Low Distortion –80 dBc Total Harmonic @ 1 MHz, RL = 100 ⍀ Outstanding Load Drive Capability Drives 45 mA, 0.5 V from Supply Rails (AD8051/AD8052) Drives 50 pF Capacitive Load (G = +1) (AD8051/AD8052) Low Power of 2.75 mA/Amplifier (AD8054) Low Power of 4.4 mA/Amplifier (AD8051/AD8052) APPLICATIONS Coax Cable Driver Active Filters Video Switchers A/D Driver Professional Cameras CCD Imaging Systems CD/DVD ROM Low Cost, High Speed Rail-to-Rail Amplifiers AD8051/AD8052/AD8054 CONNECTION DIAGRAMS (Top Views) SO-8 8 NC –IN 2 7 +VS +IN 3 6 VOUT –VS 4 5 NC R-8, SOIC (RM) AD8052 OUT1 1 – + –IN1 2 +IN1 3 – + –VS 4 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices 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 Analog Devices. 5 +VS + – +IN 3 4 –IN R-14, TSSOP-14 (RU-14) 8 +VS OUT A 1 14 OUT D 7 OUT 2IN A 2 13 2IN D 6 –IN2 +IN A 3 12 +IN D 5 +IN2 V+ 4 +IN B AD8054 11 V2 5 10 +IN C 2IN B 6 9 2IN C OUT B 7 8 OUT C The AD8051/AD8052/AD8054 offer low power supply current and can operate on a single +3 V power supply. These features are ideally suited for portable and battery powered applications where size and power are critical. The wide bandwidth and fast slew rate on a single +5 V supply make these amplifiers useful in many general purpose, high speed applications where dual power supplies of up to ±6 V and single supplies from +3 V to +12 V are needed. All of this low cost performance is offered in an 8-lead SOIC, along with a tiny SOT-23-5 package (AD8051), a µSOIC package (AD8052) and a TSSOP-14 (AD8054). 5.0 4.5 (THD # 0.5%) – Volts 4.0 3.5 VS = +5V G = –1 RF = 2kV RL = 2kV 3.0 2.5 2.0 1.5 1.0 0.5 0 0.1 REV. B –VS 2 AD8051 portable equipment. Low distortion and fast settling make them ideal for active filter applications. PEAK-TO-PEAK OUTPUT VOLTAGE SWING Despite their low cost, the AD8051/AD8052/AD8054 provide excellent overall performance and versatility. The output voltage swing extends to within 25 mV of each rail, providing the maximum output dynamic range with excellent overdrive recovery. This makes the AD8051/AD8052/AD8054 useful for video electronics such as cameras, video switchers or any high speed VOUT 1 NC = NO CONNECT PRODUCT DESCRIPTION The AD8051 (single), AD8052 (dual) and AD8054 (quad) are low cost, voltage feedback, high speed amplifiers designed to operate on +3 V, +5 V or ± 5 V supplies. They have true single supply capability with an input voltage range extending 200␣ mV below the negative rail and within 1␣ V of the positive rail. AD8051 NC 1 SOT-23-5 (RT) 1 FREQUENCY – MHz 10 50 Figure 1. Low Distortion Rail-to-Rail Output Swing One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 (@ TA = +25ⴗC, VS = +5 V, RL = 2 k⍀ to +2.5 V, AD8051/AD8052/AD8054–SPECIFICATIONS unless otherwise noted) Parameter DYNAMIC PERFORMANCE –3 dB Small Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Full Power Response Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Total Harmonic Distortion1 Input Voltage Noise Input Current Noise Differential Gain Error (NTSC) Differential Phase Error (NTSC) Crosstalk Conditions Min AD8051A/AD8052A Typ 70 G = +1, VO = 0.2 V p-p G = –1, +2, VO = 0.2 V p-p G = +2, VO = 0.2 V p-p, RL = 150 Ω to +2.5 V, RF = 806 Ω for AD8051A/AD8052A RF = 200 Ω for AD8054A 100 G = –1, VO = 2 V Step G = +1, VO = 2 V p-p G = –1, VO = 2 V Step 145 35 50 fC = 5 MHz, VO = 2 V p-p, G = +2 f = 10 kHz f = 10 kHz G = +2, RL = 150 Ω to +2.5 V RL = 1 kΩ to +2.5 V G = +2, RL = 150 Ω to +2.5 V RL = 1 kΩ to +2.5 V f = 5 MHz, G = +2 –67 16 850 0.09 0.03 0.19 0.03 –60 DC PERFORMANCE Input Offset Voltage 110 50 1.7 10 1.4 TMIN –T MAX Input Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage Swing Output Current Short Circuit Current Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current/Amplifier Power Supply Rejection Ratio RL = 2 kΩ to +2.5 V TMIN –T MAX RL = 150 Ω to +2.5 V TMIN –T MAX 86 76 0.1 98 96 82 78 72 RL = 10␣ kΩ to +2.5 V RL = 2␣ kΩ to +2.5 V RL = 150 Ω to +2.5 V VOUT = 0.5 V to +4.5 V TMIN –T MAX Sourcing Sinking G = +1 (AD8051/AD8052) G = +2 (AD8054) 0.015 to 4.985 0.1 to 4.9 0.025 to 4.975 0.3 to 4.625 0.2 to 4.8 45 45 80 130 50 Max 10 25 MHz MHz 12 170 45 40 MHz MHz V/µs MHz ns –68 16 850 0.07 0.02 0.26 0.05 –60 dB nV/√Hz fA/√Hz % % Degrees Degrees dB 1.7 15 2 2.5 3.25 0.75 82 74 70 70 –40 4.4 80 0.2 98 96 82 78 12 30 4.5 4.5 1.2 300 1.5 –0.2 to 4 86 3 68 +85 –40 2.75 80 mV mV µV/°C µA µA µA dB dB dB dB kΩ pF V dB 0.03 to 4.975 0.125 to 4.875 0.05 to 4.95 0.55 to 4.4 0.25 to 4.65 30 30 45 85 12 5 Units 150 60 V V V mA mA mA mA pF pF 40 3 OPERATING TEMPERATURE RANGE 140 290 1.4 –0.2 to 4 88 VCM = 0 V to +3.5 V ∆VS = ± 1 V 80 AD8054A Typ 20 TMIN –T MAX Offset Drift Input Bias Current Max Min 12 V 3.275 mA dB +85 °C NOTES 1 Refer to Figure 15. Specifications subject to change without notice. –2– REV. B SPECIFICATIONS AD8051/AD8052/AD8054 (@ TA = +25ⴗC, VS = +3 V, RL = 2 k⍀ to +1.5 V, unless otherwise noted) Parameter DYNAMIC PERFORMANCE –3 dB Small Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Full Power Response Settling Time to 0.1% Conditions Min 70 G = +1, VO = 0.2 V p-p G = –1, +2, VO = 0.2 V p-p G = +2, VO = 0.2 V p-p, RL = 150 Ω to 2.5 V, RF = 402 Ω for AD8051A/AD8052A RF = 200 Ω for AD8054A G = –1, VO = 2 V Step 90 G = +1, VO = 1 V p-p G = –1, VO = 2 V Step AD8051A/AD8052A Typ Max Min 110 50 AD8054A Typ 80 Max Units 135 65 MHz MHz 10 150 85 55 MHz MHz V/µs MHz ns –47 16 600 –48 16 600 dB nV/√Hz fA/√Hz 17 135 65 55 110 NOISE/DISTORTION PERFORMANCE Total Harmonic Distortion1 fC = 5 MHz, VO = 2 V p-p, G = –1, RL = 100 Ω to +1.5 V Input Voltage Noise f = 10 kHz Input Current Noise f = 10 kHz Differential Gain Error (NTSC) G = +2, VCM = +1 V RL = 150 Ω to +1.5 V, RL = 1 kΩ to +1.5 V Differential Phase Error (NTSC) G = +2, VCM = +1 V RL = 150 Ω to +1.5 V RL = 1 k Ω to +1.5 V Crosstalk f = 5 MHz, G = +2 0.11 0.09 0.13 0.09 % % 0.24 0.10 –60 0.3 0.1 –60 Degrees Degrees dB DC PERFORMANCE Input Offset Voltage 1.6 TMIN –T MAX Offset Drift Input Bias Current 10 1.3 TMIN –T MAX Input Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage Swing Output Current Short Circuit Current Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current/Amplifier Power Supply Rejection Ratio RL = 2 kΩ TMIN –T MAX RL = 150 Ω TMIN –T MAX 80 74 72 RL = 10␣ kΩ to +1.5 V RL = 2␣ kΩ to +1.5 V RL = 150 Ω to +1.5 V VOUT = 0.5 V to +2.5 V TMIN –T MAX Sourcing Sinking G = +1 (AD8051/AD8052) G = +2 (AD8054) 0.01 to 2.99 0.075 to 2.9 0.02 to 2.98 0.2 to 2.75 0.125 to 2.875 45 45 60 90 45 15 2 80 72 70 0.1 to 2.9 0.35 to 2.55 0.2 96 94 80 76 12 30 4.5 4.5 1.2 68 –40 NOTES 1 Refer to Figure 15. Specifications subject to change without notice. –3– 4.2 80 12 4.8 kΩ pF V dB 0.025 to 2.98 0.35 to 2.965 0.15 to 2.75 25 25 30 50 V V V mA mA mA mA pF pF 3 68 +85 –40 mV mV µV/°C µA µA µA dB dB dB dB 300 1.5 –0.2 to 2 86 35 3 ∆VS = +0.5 V 1.6 2.6 3.25 0.8 290 1.4 –0.2 to 2 88 VCM = 0 V to 1.5 V OPERATING TEMPERATURE RANGE REV. B 0.15 96 94 82 76 10 25 2.625 80 12 V 3.125 mA dB +85 °C (@ TA = +25ⴗC, VS = ⴞ5 V, RL = 2 k⍀ to Ground, AD8051/AD8052/AD8054–SPECIFICATIONS unless otherwise noted) Parameter DYNAMIC PERFORMANCE –3 dB Small Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Full Power Response Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Total Harmonic Distortion Input Voltage Noise Input Current Noise Differential Gain Error (NTSC) Differential Phase Error (NTSC) Crosstalk Conditions Min AD8051A/AD8052A Typ G = +1, VO = 0.2 V p-p 70 G = –1, +2, VO = 0.2 V p-p G = +2, VO = 0.2 V p-p, RL = 150 Ω, RF = 1.1 kΩ for AD8051A/AD8052A RF = 200 Ω for AD8054A G = –1, V O = 2 V Step 105 G = +1, VO = 2 V p-p G = –1, V O = 2 V Step 20 fC = 5 MHz, VO = 2 V p-p, G = +2 f = 10 kHz f = 10 kHz G = +2, RL = 150 Ω RL = 1 kΩ G = +2, RL = 150 Ω RL = 1 kΩ f = 5 MHz, G = +2 –71 16 900 0.02 0.02 0.11 0.02 –60 DC PERFORMANCE Input Offset Voltage 110 50 1.8 10 1.4 TMIN –TMAX Input Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio OUTPUT CHARACTERISTICS Output Voltage Swing Output Current Short Circuit Current Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current/Amplifier Power Supply Rejection Ratio RL = 2 kΩ TMIN –TMAX RL = 150 Ω TMIN –TMAX 88 78 0.1 96 96 82 80 72 RL = 10␣ kΩ RL = 2␣ kΩ RL = 150 Ω VOUT = –4.5 V to +4.5 V TMIN –TMAX Sourcing Sinking G = +1 (AD8051/AD8052) G = +2 (AD8054) –4.98 to +4.98 –4.85 to +4.85 –4.97 to +4.97 –4.45 to +4.3 –4.6 to +4.6 45 45 100 160 50 11 27 AD8054A Typ 160 65 MHz MHz 15 190 50 40 MHz MHz V/µs MHz ns –72 16 900 0.06 0.02 0.15 0.03 –60 dB nV/√Hz fA/√Hz % % Degrees Degrees dB 1.8 15 2 2.6 3.5 0.75 84 76 70 Max Units 0.2 96 96 82 80 13 32 4.5 4.5 1.2 300 1.5 –5.2 to 4 86 68 –40 4.8 80 –4.97 to +4.97 –4.8 to +4.8 –4.9 to +4.9 –4.0 to +3.8 –4.5 to +4.5 30 30 60 100 12 5.5 3 68 +85 –40 2.875 80 mV mV µV/°C µA µA µA dB dB dB dB kΩ pF V dB V V V mA mA mA mA pF pF 40 3 OPERATING TEMPERATURE RANGE 150 290 1.4 –5.2 to 4 88 VCM = –5 V to +3.5 V ∆VS = ± 1 V 85 170 40 50 TMIN –TMAX Offset Drift Input Bias Current Max Min 12 3.4 V mA dB +85 °C Specifications subject to change without notice. –4– REV. B AD8051/AD8052/AD8054 ABSOLUTE MAXIMUM RATINGS 1 plastic encapsulated devices is determined by the glass transition temperature of the plastic, approximately +150°C. Temporarily exceeding this limit may cause a shift in parametric performance due to a change in the stresses exerted on the die by the package. Exceeding a junction temperature of +175°C for an extended period can result in device failure. Supply␣ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.6␣ V Internal␣ Power␣ Dissipation2 Small␣ Outline␣ Package (R) . . . Observe Power Derating Curves SOT-23-5 Package . . . . . . . . Observe Power Derating Curves µSOIC Package . . . . . . . . . . Observe Power Derating Curves TSSOP-14 Package . . . . . . . Observe Power Derating Curves Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . . ± VS Differential␣ Input␣ Voltage . . . . . . . . . . . . . . . . . . . . . . . ± 2.5␣ V Output Short Circuit Duration ␣ ␣ . . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves Storage Temperature Range (R) . . . . . . . . . –65°C to +125°C Operating Temperature Range (A Grade) . . . –40°C to +85°C Lead Temperature Range (Soldering␣ 10␣ sec) . . . . . . . . +300°C While the AD8051/AD8052/AD8054 are internally short circuit protected, this may not be sufficient to guarantee that the maximum junction temperature (+150°C) is not exceeded under all conditions. To ensure proper operation, it is necessary to observe the maximum power derating curves. MAXIMUM POWER DISSIPATION – Watts 2.0 NOTES 1 Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2 Specification is for device in free air: 8-Lead SOIC: θJA = 155°C/W 5-Lead SOT-23-5: θJA = 240°C/W 8-Lead µSOIC: θJA = 200°C/W 14-Lead SOIC: θJA = 120°C/W 14-Lead TSSOP: θJA = 180°C/W 14-LEAD SOIC 1.5 8-LEAD SOIC PACKAGE 14-LEAD TSSOP-14 1.0 0.5 TJ = +1508C mSOIC SOT-23-5 0 –50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE – 8C MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by the AD8051/ AD8052/AD8054 is limited by the associated rise in junction temperature. The maximum safe junction temperature for Figure 2. Plot of Maximum Power Dissipation vs. Temperature for AD8051/AD8052/AD8054 ORDERING GUIDE Model Temperature Range Package Descriptions Package Options* Brand Code AD8051AR AD8051AR-REEL AD8051AR-REEL7 AD8051ART-REEL AD8051ART-REEL7 –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C 8-Lead SOIC 13" Tape and Reel 7" Tape and Reel 13" Tape and Reel 7" Tape and Reel SO-8 SO-8 SO-8 RT-5 RT-5 H2A H2A AD8052AR AD8052AR-REEL AD8052AR-REEL7 AD8052ARM AD8052ARM-REEL AD8052ARM-REEL7 –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C 8-Lead SOIC 13" Tape and Reel 7" Tape and Reel 8-Lead µSOIC 13" Tape and Reel 7" Tape and Reel SO-8 SO-8 SO-8 RM-8 RM-8 RM-8 H4A H4A H4A AD8054AR AD8054AR-REEL AD8054AR-REEL7 AD8054ARU AD8054ARU-REEL AD8054ARU-REEL7 –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C 14-Lead SOIC 13" Tape and Reel 7" Tape and Reel 14-Lead µSOIC 13" Tape and Reel 7" Tape and Reel R-14 R-14 R-14 RU-14 RU-14 RU-14 *R = Small Outline; RM = Micro Small Outline; RT = Surface Mount; RU = TSSOP . CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8051/AD8052/AD8054 feature proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. REV. B –5– WARNING! ESD SENSITIVE DEVICE AD8051/AD8052/AD8054 3 5 2 0 G = +5 RF = 2kV –1 –2 3 NORMALIZED GAIN – dB NORMALIZED GAIN – dB 1 G = +1 RF = 0 G = +10 RF = 2kV –3 –4 –5 –6 –7 0.1 VS = +5V GAIN AS SHOWN RF AS SHOWN RL = 2kV VO = 0.2V p-p 1 1 10 FREQUENCY – MHz 100 –1 –2 –4 1M 10M FREQUENCY – Hz 500M 100M 6 VS = +3V 5 VS = +5V 1 4 0 3 GAIN – dB VS = 65V –1 –4 G = +5 RF = 2kV Figure 6. AD8054 Normalized Gain vs. Frequency; VS = +5 V 2 –3 G = +10 RF = 2kV –3 –7 100k 500 G = +1 RF = 0 G = +2 RF = 2kV 0 –6 3 GAIN – dB 2 –5 Figure 3. AD8051/AD8052 Normalized Gain vs. Frequency; VS = +5 V –2 VS = +5V GAIN AS SHOWN RF AS SHOWN RL = 5kV VO = 0.2V p-p 4 G = +2 RF = 2kV VS AS SHOWN G = +1 RL = 2kV VO = 0.2V p-p +3V G = +1 RL = 2kV CL = 5pF VO = 0.2V p-p +5V 65V 2 1 0 65V –1 –5 –2 –6 –3 +3V –7 0.1 1 10 FREQUENCY – MHz 100 –4 100k 500 3 10M FREQUENCY – Hz 100M 500M 4 2 +858C +258C 3 –408C 1 2 0 +858C +258C –1 –408C 1 GAIN – dB GAIN – dB 1M Figure 7. AD8054 Gain vs. Frequency vs. Supply Figure 4. AD8051/AD8052 Gain vs. Frequency vs. Supply –2 –3 0 VS = +5V RL = 2kV TO 2.5V CL = 5pF G = +1 VO = 0.2V p-p –1 –2 VS = +5V G = +1 –5 RL = 2kV VO = 0.2V p-p –6 TEMPERATURE AS SHOWN –4 –7 0.1 +5V –3 –4 –5 1 10 FREQUENCY – MHz 100 500 1 Figure 5. AD8051/AD8052 Gain vs. Frequency vs. Temperature 10 FREQUENCY – MHz 100 500 Figure 8. AD8054 Gain vs. Frequency vs. Temperature –6– REV. B 6.3 6.3 6.2 6.2 6.1 6.1 GAIN FLATNESS – dB 6.0 5.9 5.8 5.7 5.6 5.5 VS = +5V G = +2 RL = 150V RF = 806V VO = 0.2V p-p 6.0 5.9 5.8 5.6 5.5 5.4 5.4 5.3 5.3 0.1 1 10 FREQUENCY – MHz 100 Figure 9. AD8051/AD8052 0.1 dB Gain Flatness vs. Frequency; G = +2 6 5 5 GAIN – dB GAIN – dB 7 6 4 VS = 65V VO = 4V p-p 3 VS AS SHOWN G = +2 RL = 2kV RF = 2kV VO AS SHOWN –1 0.1 1 0 100 500 1 10 FREQUENCY – MHz 100 500 Figure 13. AD8054 Large Signal Frequency Response; G = +2 80 VS = +5V RL = 2kV 70 VS = +5V RL = 2kV CL = 5pF 70 60 OPEN-LOOP GAIN – dB 60 50 40 GAIN 0 30 20 PHASE 508 PHASE MARGIN –45 10 –90 0 –135 –10 –180 0.1 1 10 FREQUENCY – MHz 100 PHASE – Degrees OPEN-LOOP GAIN – dB VS AS SHOWN G = +2 RL = 2kV RF = 2kV VO AS SHOWN –1 0.1 80 50 40 GAIN 30 180 20 135 PHASE 10 458 PHASE MARGIN 0 –20 30k 500 90 45 –10 Figure 11. AD8051/AD8052 Open-Loop Gain and Phase vs. Frequency REV. B 3 1 10 FREQUENCY – MHz VS = 65V VO = 4V p-p 4 2 Figure 10. AD8051/AD8052 Large Signal Frequency Response; G = +2 –20 0.01 100 VS = +5V VO = 2V p-p 8 7 0 10 FREQUENCY – MHz 9 VS = +5V VO = 2V p-p 8 1 1 Figure 12. AD8054 0.1 dB Gain Flatness vs. Frequency; G = +2 9 2 VS = +5V RF = 200V RL = 150V G = +2 VO = 0.2V p-p 5.7 0 100k 1M 10M FREQUENCY – Hz 100M 500M Figure 14. AD8054 Open-Loop Gain and Phase Margin vs. Frequency –7– PHASE MARGIN – Degrees GAIN FLATNESS – dB AD8051/AD8052/AD8054 AD8051/AD8052/AD8054 1000 VS = +3V, G = 21 RF = 2kV, RL = 100V VO = 2V p-p 230 VS = +5V VS = +5V, G = +2 RF = 2kV, RL = 100V VS = +5V, G = +1 RL = 100V 240 250 VOLTAGE NOISE – nA Hz TOTAL HARMONIC DISTORTION – dBc 220 260 270 VS = +5V, G = +1 RL = 2kV 280 VS = +5V, G = +2 RF = 2kV, RL = 2kV 290 100 10 2100 2110 1 2 3 4 5 6 7 FUNDAMENTAL FREQUENCY – MHz 1 10 8 9 10 1M 10M Figure 18. Input Voltage Noise vs. Frequency Figure 15. Total Harmonic Distortion 230 100 VS = +5V 240 10MHz 250 260 CURRENT NOISE – pA Hz WORST HARMONIC – dBc 1k 10k 100k FREQUENCY – Hz 100 270 280 5MHz 290 2100 VS = +5V RL = 2kV G = +2 1MHz 2110 2120 10 1 2130 2140 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 OUTPUT VOLTAGE – V p-p 4.0 4.5 0.1 10 5.0 RL = 1kV VS = +5, G = +2 RF = 2kV, RL AS SHOWN 0 10 20 30 40 0.10 0.05 0.00 50 60 70 80 90 100 RL = 1kV 20.05 20.10 20.15 20.20 20.25 1M 10M 0.10 RL = 150V NTSC SUBSCRIBER (3.58MHz) DIFFERENTIAL GAIN – % 0.10 0.08 0.06 0.04 0.02 0.00 20.02 20.04 20.06 1k 10k 100k FREQUENCY – Hz Figure 19. Input Current Noise vs. Frequency DIFFERENTIAL PHASE – Degrees DIFFERENTIAL PHASE ERROR – Degrees DIFFERENTIAL GAIN ERROR – % Figure 16. Worst Harmonic vs. Output Voltage 100 RL = 150V VS = +5, G = +2 RF = 2kV, RL AS SHOWN NTSC SUBSCRIBER (3.58MHz) 0.00 –0.05 VS = +5, G = +2 RF = 2kV, RL AS SHOWN –0.10 1st 2nd 3rd 4th 5th 0.3 10 20 30 40 50 60 70 80 MODULATING RAMP LEVEL – IRE 90 100 Figure 17. AD8051/AD8052 Differential Gain and Phase Errors RL = 150V 6th 7th 8th 9th 10th 11th 0.2 RL = 1kV 0.1 0.0 –0.1 –0.2 –0.3 0 RL = 1kV 0.05 VS = +5, G = +2 RF = 2kV, RL AS SHOWN 1st 2nd RL = 150V 3rd 4th 5th 6th 7th 8th 9th 10th 11th MODULATING RAMP LEVEL – IRE Figure 20. AD8054 Differential Gain and Phase Errors –8– REV. B AD8051/AD8052/AD8054 –10 –20 –20 –30 –40 –40 CROSSTALK – dB CROSSTALK – dB –30 –10 VS = +5V RF = 2kV RL = 2kV VO = 2V p-p –50 –60 –70 RL = 100V –50 –60 –70 RL = 1kV –80 –80 –90 –90 –100 –100 0.1 1 10 FREQUENCY – MHz 100 –110 0.1 500 10 0 –30 –10 –40 –20 PSRR – dB CMRR – dB VS = +5V –20 –50 –60 –80 –60 –90 –70 0.1 1 10 FREQUENCY – MHz 100 –80 0.01 500 +PSRR 0.1 1 10 FREQUENCY – MHz 100 500 70 100 VS = 15V G = 11 60 SETTING TIME TO 0.1% 2 ns OUTPUT RESISTANCE – V –PSRR Figure 25. PSRR vs. Frequency Figure 22. CMRR vs. Frequency 10 3.1 1 0.31 0.1 AD8051/AD8052 50 AD8054 40 30 20 VS = 15V G = 21 RL = 2kV 10 0.031 1 10 FREQUENCY – MHz 100 0 0.5 500 Figure 23. Closed Loop Output Resistance vs. Frequency REV. B 500 VS = +5V –40 –70 0.01 0.1 100 –30 –50 31 10 FREQUENCY – MHz 20 0 –100 0.03 1 Figure 24. AD8054 Crosstalk (Output-to-Output) vs. Frequency Figure 21. AD8052 Crosstalk (Output-to-Output) vs. Frequency –10 VS = 65V RF = 1kV RL = AS SHOWN VO = 2V p-p 1 1.5 INPUT STEPS – Volts p-p Figure 26. Settling Time vs. Input Step –9– 2 AD8051/AD8052/AD8054 1.00 VS = +5V VOH = +858C 0.90 0.80 OUTPUT SATURATION VOLTAGE – Volts OUTPUT SATURATION VOLTAGE – Volts 1.00 VOH = +258C 0.70 VOH = –408C VOL = +858C 0.60 0.50 0.40 0.30 VOL = +258C 0.20 VOL = –408C 0.10 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 LOAD CURRENT – mA Figure 27. AD8051/AD8052 Output Saturation Voltage vs. Load Current +5V –VOH (+1258C) 0.750 +5V –VOH (+258C) 0.625 +5V –VOH (–558C) 0.500 0.375 0.250 VOL (+1258C) 0.125 VOL (–558C) 0.00 0 0 0 VS = +5V 0.875 3 6 9 VOL (+258C) 12 15 18 21 LOAD CURRENT – mA 24 27 30 Figure 29. AD8054 Output Saturation Voltage vs. Load Current 100 OPEN-LOOP GAIN – dB RL = 2kV 90 RL = 150V 80 70 VS = +5V 60 0 0.5 1 1.5 2 2.5 3 3.5 OUTPUT VOLTAGE – Volts 4 4.5 5 Figure 28. Open-Loop Gain vs. Output Voltage –10– REV. B AD8051/AD8052/AD8054 VOLTS 5 1.50V 2.5 Figure 33. Output Swing; G = –1, RL = +2 kΩ Figure 30. 100 mV Step Response, G = +1 2.55 VOLTS 2.60 2.50 2.50 2.45 2.40 20ns Figure 34. AD8054 100 mV Step Response; VS = +5 V, G = +1 Figure 31. AD8051/AD8052 200 mV Step Response; VS = +5 V, G = +1 4 3 VOLTS 3.5 2 1 2.5 21 1.5 22 23 24 Figure 35. Large Signal Step Response; VS = ± 5 V, G = +1 Figure 32. Large Signal Step Response; VS = +5 V, G = +2 REV. B –11– AD8051/AD8052/AD8054 Overdrive Recovery Overdrive of an amplifier occurs when the output and/or input range are exceeded. The amplifier must recover from this overdrive condition. As shown in Figure 36, the AD8051/AD8052/ AD8054 recovers within 60␣ ns from negative overdrive and within 45␣ ns from positive overdrive. 2.60 2.55 2.50 2.45 2.40 Figure 38. AD8051/AD8052 200 mV Step Response: CL = 50 pF 10000 VS = +5V # 30% OVERSHOOT CAPACITIVE LOAD 2 PF Figure 36.␣ Overdrive Recovery Driving Capacitive Loads Consider the AD8051/AD8052 in a closed-loop gain of +1 with +VS = 5 V and a load of 2 kΩ in parallel with 50 pF. Figures 37 and 38 show its frequency and time domain responses, respectively, to a small-signal excitation. The capacitive load drive of the AD8051/AD8052/AD8054 can be increased by adding a low valued resistor in series with the load. Figures 39 and 40 show the effect of a series resistor on capacitive drive for varying voltage gains. As the closed-loop gain is increased, the larger phase margin allows for larger capacitive loads with less peaking. Adding a series resistor with lower closed-loop gains accomplishes the same effect. For large capacitive loads, the frequency response of the amplifier will be dominated by the roll-off of the series resistor and the load capacitance. RS = 3V 1000 RS = 0V 100 RG RS VIN 100mV STEP 50V 10 1 RF 1 2 3 VOUT CL 4 A C L – V/V 6 5 Figure 39. AD8051/AD8052 Capacitive Load Drive vs. Closed-Loop Gain 8 1000 6 VS = +5V # 30% OVERSHOOT 4 CAPACITIVE LOAD – pF GAIN – dB 2 0 22 24 VS = +5V G = +1 RL = 2kV CL = 50pF VO = 200mV p-p 26 28 210 0.1 1 RS = 10V RS = 0V 100 RG RF VIN 100mV STEP 50V 10 FREQUENCY – MHz 100 500 Figure 37. AD8051/AD8052 Closed-Loop Frequency Response: CL = 50 pF RS VOUT CL 10 1 2 3 4 A C L – V/V 5 6 Figure 40. AD8054 Capacitive Load Drive vs. Closed-Loop Gain Circuit Description The AD8051/AD8052/AD8054 is fabricated on Analog Devices’ proprietary eXtra-Fast Complementary Bipolar (XFCB) process, which enables the construction of PNP and NPN transistors with similar fTs in the 2 GHz–4 GHz region. The process is dielectrically isolated to eliminate the parasitic and latch-up –12– REV. B AD8051/AD8052/AD8054 problems caused by junction isolation. These features allow the construction of high frequency, low distortion amplifiers with low supply currents. This design uses a differential output input stage to maximize bandwidth and headroom (see Figure 1). The smaller signal swings required on the first stage outputs (nodes S1P, S1N) reduce the effect of nonlinear currents due to junction capacitances and improve the distortion performance. With this design harmonic distortion of –80 dBc @ 1 MHz into 100 Ω with VOUT = 2 V p-p (Gain = +1) on a single 5 V supply is achieved. The inputs of the device can handle voltages from –0.2 V below the negative rail to within 1 V of the positive rail. Exceeding these values will not cause phase reversal; however, the input ESD devices will begin to conduct if the input voltages exceed the rails by greater than 0.5 V. During this overdrive condition, the output stays at the rail. The rail-to-rail output range of the AD8051/AD8052/AD8054 is provided by a complementary common-emitter output stage. High output drive capability is provided by injecting all output stage predriver currents directly into the bases of the output devices Q8 and Q36. Biasing of Q8 and Q36 is accomplished by I8 and I5, along with a common-mode feedback loop (not shown). This circuit topology allows the AD8051/AD8052 to drive 45 mA of output current and the AD8054 to drive 30 mA of output current with the outputs within 0.5␣ V of the supply rails. to a minimum. Parasitic capacitance of less than 1 pF at the inverting input can significantly affect high speed performance. Stripline design techniques should be used for long signal traces (greater than about 25 mm). These should be designed with a characteristic impedance of 50 Ω or 75 Ω and be properly terminated at each end. Active Filters Active filters at higher frequencies require wider bandwidth op amps to work effectively. Excessive phase shift produced by lower frequency op amps can significantly impact active filter performance. Figure 42 shows an example of a 2␣ MHz biquad bandwidth filter that uses three op amps of an AD8054. Such circuits are sometimes used in medical ultrasound systems to lower the noise bandwidth of the analog signal before A/D conversion. Please note that the unused amplifiers’ inputs should be tied to ground. R6 1kV C1 50pF R2 2kV VIN R1 3kV R26 I10 Q4 R39 Q25 1 R3 2kV I2 6 7 Q51 Q31 Q7 Q1 VINN SIP Q2 R5 R21 AD8054 VOUT AD8054 Figure 42. 2␣ MHz Biquad Bandpass Filter Using AD8054 VEE The frequency response of the circuit is shown in Figure 43. C3 VOUT Q27 C9 SIN Q3 9 10 I5 R23 R27 Q21 C7 Q39 Q23 Q22 R5 2kV 12 8 AD8054 Q36 Q5 VEE Q13 I3 14 C2 50pF 5 I9 Q50 Q40 R15 R2 VINP 2 3 VCC 13 R4 2kV 0 Q8 Q11 Q24 R3 I7 Q47 I11 I8 210 VCC GAIN – dB VEE Figure 41. AD8051/AD8052 Simplified Schematic APPLICATIONS Layout Considerations 230 The specified high speed performance of the AD8051/AD8052/ AD8054 requires careful attention to board layout and component selection. Proper RF design techniques and low-parasitic component selection are necessary. 240 10k The PCB should have a ground plane covering all unused portions of the component side of the board to provide a low impedance path. The ground plane should be removed from the area near the input pins to reduce the parasitic capacitance. Chip capacitors should be used for the supply bypassing. One end should be connected to the ground plane and the other within 3 mm of each power pin. An additional large (4.7␣ µF to 10 µF) tantalum electrolytic capacitor should be connected in parallel, but not necessarily so close, to supply current for fast, large signal changes at the output. The feedback resistor should be located close to the inverting input pin in order to keep the parasitic capacitance at this node REV. B 220 100k 1M FREQUENCY – Hz 10M 100M Figure 43. Frequency Response of 2␣ MHz Bandpass Biquad Filter A/D and D/A Applications Figure 44 is a schematic showing the AD8051 used as a driver for an AD9201, a 10-bit 20 MSPS dual A/D converter. This converter is designed to convert I and Q signals in communication systems. In this application, only the I channel is being driven. The I channel is enabled by applying a logic HIGH to SELECT, Pin 27. The AD8051 is running from a dual supply and is configured for a gain of +2. The input signal is terminated in 50 Ω and –13– AD8051/AD8052/AD8054 0.33mF +5V 10pF 1kV CLK SLEEP 22V 1VDD SELECT INA-I 22V INB-I 0.1mF 10mF 0.01mF 22V 10mF 0.1mF AD8051 50V AD9201 10pF 0.1mF 1kV 0.1mF 10mF 10mF 0.1mF DATA OUT REFT-I D9 0.1mF REFB-I D8 AVSS D7 REFSENSE D6 VREF D5 D4 25V 15V 10mF AVDD 0.1mF 1kV 0.1mF 10mF 0.1mF D3 REFB-Q D2 REFT-Q D1 0.1mF D0 22V 15V DVDD INB-Q 10pF 0.1mF DVSS 22V 10mF INA-Q 10pF THREE–STATE Figure 44. AD8051 Driving an AD9201, a 10-Bit 20 MSPS A/D Converter applied to the noninverting input of the AD8051. The amplifier output is 2 V p-p, which is the maximum input range of the AD9201. The 22 Ω series resistor limits the maximum current that flows and helps to lower the distortion of the A/D. The AD9201 has differential inputs for each channel. These are designated the A and B inputs. The B inputs of each channel are connected to VREF (Pin 8) which supplies a positive reference of 2.5 V. Each of the B inputs has a small low pass filter that also helps to reduce distortion. The output of the op amp is ac coupled into INA-I (Pin 2) via two parallel capacitors to provide good high frequency and low frequency coupling. The 1 kΩ resistor references the signal to VREF that is applied to INB-I. Thus, INA-I will swing both 10.0 5.0 0.0 25.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 2100.0 2105.0 2110.0 2115.0 2120.0 0.0E10 PART# FUND With the sampling clock running at 20 MSPS, the A/D output was analyzed with a digital analyzer. Two input frequencies were used, 1 MHz and 9.5 MHz, which is just short of the Nyquist frequency. These signals were well filtered to minimize any harmonics. Figure 45 shows the FFT response of the A/D for the case of 1 MHz analog input. The SFDR is 71.66 dB and the A/D is producing 8.8 ENOB (effective number of bits). When the analog frequency was raised to 9.5 MHz, the SFDR was reduced to 60.18 dB and the A/D operated with 8.46 ENOBs as shown in Figure 46. The inclusion of the AD8051 in the circuit had no worsening of the distortion performance of the AD9201. 10.0 5.0 0.0 25.0 210.0 215.0 0 FFTSIZE 8192 2ND 3RD 7TH 4TH 5TH 2.0E16 1.0E16 positive and negative with respect to the bias voltage applied to INB-I. 4.0E16 3.0E16 8TH 6TH 6.0E16 5.0E16 9TH 8.0E16 7.0E16 FCLK 20.0E16 FUND 998.5E13 VIN 20.51dB THD 268.13 SNR 54.97 SINAD 54.76 ENOB 8.80 SFDR 271.66 2ND 274.53 3RD 276.06 4TH 276.35 5TH 279.05 6TH 280.36 7TH 275.08 8TH 288.12 9TH 277.87 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 2ND 270.0 275.0 280.0 285.0 3RD 7TH 4TH 6TH 8TH 290.0 295.0 2100.0 2105.0 2110.0 2115.0 2120.0 0.0E10 10.0E16 9.0E16 Figure 45. FFT Plot for AD8051 Driving the AD9201 at 1 MHz PART# FUND 2.0E16 1.0E16 4.0E16 3.0E16 6.0E16 5.0E16 8.0E16 7.0E16 0 FFTSIZE 8192 FCLK 20.0E16 FUND 9.5E16 VIN 20.44dB THD 257.08 SNR 54.65 SINAD 52.69 ENOB 8.46 SFDR 260.18 2ND 260.18 3RD 260.23 4TH 282.01 5TH 278.83 6TH 281.28 7TH 277.28 8TH 284.54 9TH 292.78 10.0E16 9.0E16 Figure 46. FFT Plot for AD8051 Driving the AD9201 at 9.5 MHz –14– REV. B AD8051/AD8052/AD8054 goes high with a duty cycle that is a small fraction of a percent. The opposite condition defines the other extreme. Sync Stripper Synchronizing pulses are sometimes carried on video signals so as not to require a separate channel to carry the synchronizing information. However, for some functions, like A/D conversion, it is not desirable to have the sync pulses on the video signal. These pulses will reduce the dynamic range of the video signal and do not provide any useful information for such a function. The worst case of composite video is not quite this demanding. One bounding condition is a signal that is mostly black for an entire frame, but has a white (full amplitude) minimum width spike at least once in a frame. The other extreme is for a full white video signal. The blanking intervals and sync tips of such a signal will have negative-going excursions is compliance with the composite video specifications. The combination of horizontal and vertical blanking intervals limit such a signal to being at the highest (white) level for a maximum of about 75% of the time. A sync stripper will remove the synchronizing pulses from a video signal while passing all the useful video information. Figure 47 shows a practical single supply circuit that uses only a single AD8051. It is capable of directly driving a reverse terminated video line. VBLANK As a result of the duty cycles between the two extremes presented above, a 1 V p-p composite video signal that is multiplied by a gain of two requires about 3.2 V p-p of dynamic voltage swing at the output for an op amp to pass a composite video signal of arbitrary varying duty cycle without distortion. VIDEO WITHOUT SYNC VIDEO WITH SYNC GROUND +0.4V GROUND Some circuits use a sync tip clamp to hold the sync tips at a relatively constant level in order to lower the amount of dynamic signal swing required. However, these circuits can have artifacts like sync tip compression unless they are driven by a source with a very low output impedance. The AD8051/AD8052/AD8054 have adequate signal swing when running on a single +5 V supply to handle an ac coupled composite video signal. +3V OR +5V 0.1mF + 10mF VIN TO A/D AD8051 100V R2 1kV The input to the circuit in Figure 48 is a standard composite (1 V p-p) video signal that has the blanking level at ground. The input network level shifts the video signal by means of ac coupling. The noninverting input of the op amp is biased to half of the supply voltage. R1 1kV +0.8V (OR 2 3 VBLANK) Figure 47. Sync Stripper The feedback circuit provides unity gain for the dc biasing of the input, and provides a gain of two for any signals that are in the video bandwidth. The output is ac coupled and terminated to drive the line. The video signal plus sync is applied to the noninverting input with the proper termination. The amplifier gain is set equal to two via the two 1 kΩ resistors in the feedback circuit. A bias voltage must be applied to R1 in order that the input signal has the sync pulses stripped at the proper level. The capacitor values were selected for providing minimum “tilt” or field time distortion of the video signal. These values would be required for video that is considered to be studio or broadcast quality. However, if a lower consumer grade of video, sometimes referred to as “consumer video” is all that is desired, the values and the cost of the capacitors can be reduced by as much as a factor of five with minimum visible degradation in the picture. The blanking level of the input video pulse is the desired place to remove the sync information. This level is multiplied by two by the amplifier. This level must be at ground at the output in order for the sync stripping action to take place. Since the gain of the amplifier from the input of R1 to the output is –1, a voltage equal to 2 × VBLANK must be applied to make the blanking level come out at ground. +5V 4.99kV Single Supply Composite Video Line Driver Many composite video signals have their blanking level at ground and have video information that is both positive and negative. Such signals require dual supply amplifiers to pass them. However, by ac level shifting a single supply amplifier can be used to pass these signals. The following complications may arise from such techniques. Signals of bounded peak-to-peak amplitude that vary in duty cycle require larger dynamic swing capacity than their (bounded) peak to peak amplitude after they are ac coupled. As a worst case, the dynamic signal swing will approach twice the peakto-peak value. The two conditions that define the maximum dynamic wing requirements are a signal that is mostly low, but REV. B 4.99kV COMPOSITE 47mF VIDEO + IN RT 10mF 75V + 10mF 0.1mF + 10mF 1000mF + AD8051 RBT 75V RL 75V RF 1kV VOUT 0.1mF RG 1kV 220mF Figure 48. Single Supply Composite Video Line Driver –15– AD8051/AD8052/AD8054 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 14-Lead SOIC (R-14) 0.1968 (5.00) 0.1890 (4.80) 0.1574 (4.00) 0.1497 (3.80) 8 5 1 4 PIN 1 0.3444 (8.75) 0.3367 (8.55) 0.0500 0.0192 (0.49) (1.27) 0.0138 (0.35) BSC SEATING PLANE 0.1574 (4.00) 0.1497 (3.80) 0.2440 (6.20) 0.2284 (5.80) 0.0688 (1.75) 0.0532 (1.35) 0.0098 (0.25) 0.0040 (0.10) 8° 0° 8 1 7 0.0098 (0.25) 0.0040 (0.10) 0.0500 (1.27) BSC SEATING PLANE 0.0500 (1.27) 0.0160 (0.41) 0.0098 (0.25) 0.0075 (0.19) 8° 0° 0.0500 (1.27) 0.0160 (0.41) 0.201 (5.10) 0.193 (4.90) 14 5 0.199 (5.05) 0.187 (4.75) 1 0.0192 (0.49) 0.0138 (0.35) 0.0196 (0.50) x 45° 0.0099 (0.25) 14-Lead TSSOP (RU-14) 0.122 (3.10) 0.114 (2.90) 8 0.2440 (6.20) 0.2284 (5.80) 0.0688 (1.75) 0.0532 (1.35) PIN 1 0.0196 (0.50) x 45° 0.0099 (0.25) 0.0098 (0.25) 0.0075 (0.19) 14 8-Lead SOIC (RM-8) 0.122 (3.10) 0.114 (2.90) C3139b–0–9/99 8-Lead SOIC (SO-8) 8 0.177 (4.50) 0.169 (4.30) 4 0.256 (6.50) 0.246 (6.25) 1 PIN 1 7 0.0256 (0.65) BSC 0.120 (3.05) 0.112 (2.84) 0.120 (3.05) 0.112 (2.84) PIN 1 0.006 (0.15) 0.002 (0.05) 0.043 (1.09) 0.037 (0.94) 0.006 (0.15) 0.002 (0.05) 0.018 (0.46) 0.008 (0.20) SEATING PLANE 0.011 (0.28) 0.003 (0.08) 33° 27° 0.028 (0.71) 0.016 (0.41) SEATING PLANE 0.0433 (1.10) MAX 0.0256 (0.65) BSC 0.0118 (0.30) 0.0075 (0.19) 0.0079 (0.20) 0.0035 (0.090) 8° 0° 0.028 (0.70) 0.020 (0.50) 5-Lead Plastic Surface Mount (RT-5) 0.0709 (1.800) 0.0590 (1.500) 5 4 1 2 3 PRINTED IN U.S.A. 0.1220 (3.100) 0.1063 (2.700) 0.1181 (3.000) 0.0984 (2.500) PIN 1 0.0374 (0.950) REF 0.0748 (1.900) REF 0.0512 (1.300) 0.0354 (0.900) 0.0590 (0.150) 0.0000 (0.000) 0.0079 (0.200) 0.0035 (0.090) 0.0571 (1.450) 0.0354 (0.900) 0.0197 (0.500) 0.0118 (0.300) SEATING PLANE 10° 0° 0.0236 (0.600) 0.0039 (0.100) –16– REV. B