ADA4853-2YCPZ-R2

Low Power, Rail-to-Rail Output, Video Op Amps with Ultralow Power ADA4853-1/ADA4853-2/ADA4853-3 FEATURES Ultralow power-down current: 0.1 μA Low quiescent current: 1.4 mA/amplifier Ideal for standard definition video High speed 100 MHz, −3 dB bandwidth 120 V/μs slew rate 0.5 dB flatness: 22 MHz Differential gain: 0.20% Differential phase: 0.10° Single-supply operation Rail-to-rail output Output swings to within 200 mV of either rail Low voltage offset: 1 mV Wide supply range: 2.65 V to 5 V PIN CONFIGURATIONS 14 PD1 16 VOUT1 1 ADA4853-2 – + – + 15 13 PD2 NC NC 12 11 10 9 +VS VOUT2 –IN2 +IN2 VOUT 1 –VS 2 +IN 3 ADA4853-1 6 5 4 +VS POWER DOWN –IN 05884-001 –IN1 2 +IN1 3 –VS 4 NC 8 NC 7 NC 5 NC 6 TOP VIEW (Not to Scale) NC = NO CONNECT Figure 1. 6-Lead SC70 ADA4853-3 VOUT +VS +IN –IN Figure 2. 16-Lead LFCSP_VQ DISABLE 1 DISABLE 2 DISABLE 3 1 2 3 4 5 6 7 14 VOUT +– 13 –IN 12 +IN 14 15 16 13 –+ DISABLE 1 1 DISABLE 2 2 DISABLE 3 3 +VS 4 +– VOUT 7 –VS 8 +IN 5 –IN 6 12 –VS +VS +IN –IN VOUT ADA4853-3 –+ +– 11 –VS 10 +IN 9 8 Portable multimedia players Video cameras Digital still cameras Consumer video Clock buffer 9 VOUT 05884-057 VOUT Figure 3. 16-Lead LFCSP_VQ Figure 4. 14-Lead TSSOP GENERAL DESCRIPTION The ADA4853-1/ADA4853-2/ADA4853-3 are low power, low cost, high speed, rail-to-rail output op amps with ultralow power disables that are ideal for portable consumer electronics. Despite their low price, the ADA4853-1/ADA4853-2/ADA4853-3 provide excellent overall performance and versatility. The 100 MHz, −3 dB bandwidth, and 120 V/μs slew rate make these amplifiers well-suited for many general-purpose, high speed applications. The ADA4853-1/ADA4853-2/ADA4853-3 voltage feedback op amps are designed to operate at supply voltages as low as 2.65 V and up to 5 V using only 1.4 mA of supply current per amplifier. To further reduce power consumption, the amplifiers are equipped with a power-down mode that lowers the supply current to less than 1.5 μA maximum, making them ideal in battery-powered applications. The ADA4853-1/ADA4853-2/ADA4853-3 provide users with a true single-supply capability, allowing input signals to extend 200 mV below the negative rail and to within 1.2 V of the positive rail. On the output, the amplifiers can swing within 200 mV of either supply rail. With their combination of low price, excellent differential gain (0.2%), differential phase (0.10°), and 0.5 dB flatness out to 22 MHz, these amplifiers are ideal for video applications. The ADA4853-1 is available in a 6-lead SC70, the ADA4853-2 is available in a 16-lead LFCSP_VQ, and the ADA4853-3 is available in both a 16-lead LFCSP_VQ and a 14-lead TSSOP. The ADA4853-1 temperature range is −40°C to +85°C, while the ADA4853-2/ADA4853-3 temperature range is −40°C to +105°C. 6.5 6.4 6.3 CLOSED-LOOP GAIN (dB) VS = 5V RL = 150Ω G = +2 0.1V p-p 6.2 6.1 6.0 5.9 5.8 5.7 5.6 5.5 0.1 1 FREQUENCY (MHz) 10 40 05884-010 2.0V p-p Figure 5. 0.5 dB Flatness Frequency Response Rev. C 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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006–2007 Analog Devices, Inc. All rights reserved. 05884-058 APPLICATIONS + – 11 +IN 10 –IN –IN 05884-056 ADA4853-1/ADA4853-2/ADA4853-3 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Pin Configurations ........................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Specifications with 3 V Supply ................................................... 3 Specifications with 5 V Supply ................................................... 4 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Typical Performance Characteristics ..............................................6 Circuit Description......................................................................... 14 Headroom Considerations ........................................................ 14 Overload Behavior and Recovery ............................................ 14 Applications Information .............................................................. 15 Single-Supply Video Amplifier ................................................. 15 Power Supply Bypassing ............................................................ 15 Layout .......................................................................................... 15 Outline Dimensions ....................................................................... 16 Ordering Guide .......................................................................... 16 REVISION HISTORY 10/07—Rev. B to Rev. C Changes to Applications Section .................................................... 1 Changes to Ordering Guide .......................................................... 16 10/06—Rev. A to7 Rev. B Added ADA4853-3 ............................................................. Universal Added 16-Lead LFCSP_VQ .............................................. Universal Added 14-Lead TSSOP ...................................................... Universal Changes to Features.......................................................................... 1 Changes to DC Performance, Input Characteristics, and Power Supply Sections ................................................................................. 3 Changes to DC Performance, Input Characteristics, and Power Supply Sections ................................................................................. 4 Changes to Figure 20 ........................................................................ 8 Changes to Figure 49 ...................................................................... 13 Updated Outline Dimensions ....................................................... 16 Changes to Ordering Guide .......................................................... 16 7/06—Rev. 0 to Rev. A Added ADA4853-2 ............................................................. Universal Changes to Features and General Description ..............................1 Changes to Table 1.............................................................................3 Changes to Table 2.............................................................................4 Changes to Table 3.............................................................................5 Changes to Figure 7 ...........................................................................6 Changes to Figure 11 Caption, Figure 12, Figure 13, and Figure 16......................................................................................7 Changes to Figure 17 and Figure 19................................................8 Inserted Figure 21; Renumbered Sequentially ..............................8 Inserted Figure 25; Renumbered Sequentially ..............................9 Changes to Figure 28.........................................................................9 Changes to Figure 31 through Figure 35 ..................................... 10 Changes to Figure 37, Figure 39 through Figure 42 .................. 11 Inserted Figure 43 and Figure 46.................................................. 12 Inserted Figure 47 ........................................................................... 13 Changes to Circuit Description Section ...................................... 13 Changes to Headroom Considerations Section ......................... 13 Changes to Figure 48...................................................................... 14 Updated Outline Dimensions ....................................................... 15 Changes to Ordering Guide .......................................................... 15 1/06—Revision 0: Initial Version Rev. C | Page 2 of 16 ADA4853-1/ADA4853-2/ADA4853-3 SPECIFICATIONS SPECIFICATIONS WITH 3 V SUPPLY TA = 25°C, RF = 1 kΩ, RG = 1 kΩ for G = +2, RL = 150 Ω, unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.5 dB Flatness Settling Time to 0.1% Slew Rate NOISE/DISTORTION PERFORMANCE Differential Gain Differential Phase Input Voltage Noise Input Current Noise Crosstalk DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Bias Current Drift Input Bias Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common-Mode Voltage Range Input Overdrive Recovery Time (Rise/Fall) Common-Mode Rejection Ratio POWER-DOWN Power-Down Input Voltage Turn-Off Time Turn-On Time Power-Down Bias Current Enabled Power-Down OUTPUT CHARACTERISTICS Output Overdrive Recovery Time Output Voltage Swing Short-Circuit Current POWER SUPPLY Operating Range Quiescent Current/Amplifier Quiescent Current (Power-Down)/Amplifier Positive Power Supply Rejection Negative Power Supply Rejection Conditions G = +1, VO = 0.1 V p-p G = +2, VO = 2 V p-p G = +2, VO = 2 V p-p, RL = 150 Ω VO = 2 V step G = +2, VO = 2 V step RL = 150 Ω RL = 150 Ω f = 100 kHz f = 100 kHz G = +2, VO = 2 V p-p, RL = 150 Ω, f = 5 MHz Min Typ 90 32 22 45 100 0.20 0.10 22 2.2 −66 1 1.6 1.0 4 50 80 0.5/20 0.6 −0.2 to +VCC − 1.2 40 −85 1.2 1.4 120 25 0.01 70 0.15 to 2.88 150/120 5 1.6 1.5 30 4 1.7 Max Unit MHz MHz MHz ns V/μs % Degrees nV/√Hz pA/√Hz dB mV μV/°C μA nA/°C nA dB MΩ pF V ns dB V μs ns μA μA ns V mA V mA μA dB dB 88 VO = 0.5 V to 2.5 V Differential/common mode 72 VIN = −0.5 V to +3.5 V, G = +1 VCM = 0 V to 1 V Power-down −69 Power-down = 3.0 V Power-down = 0 V VIN = −0.25 V to +1.75 V, G = +2 RL = 150 Ω Sinking/sourcing 0.3 to 2.7 2.65 Power-down = low +VS = +1.5 V to +2.5 V, −VS = −1.5 V −VS = −1.5 V to −2.5 V, +VS = +1.5 V 1.3 0.1 −86 −88 −76 −77 Rev. C | Page 3 of 16 ADA4853-1/ADA4853-2/ADA4853-3 SPECIFICATIONS WITH 5 V SUPPLY TA = 25°C, RF = 1 kΩ, RG = 1 kΩ for G = +2, RL = 150 Ω, unless otherwise noted. Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.5 dB Flatness Settling Time to 0.1% Slew Rate NOISE/DISTORTION PERFORMANCE Differential Gain Differential Phase Input Voltage Noise Input Current Noise Crosstalk DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Bias Current Drift Input Bias Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common-Mode Voltage Range Input Overdrive Recovery Time (Rise/Fall) Common-Mode Rejection Ratio POWER-DOWN Power-Down Input Voltage Turn-Off Time Turn-On Time Power-Down Bias Current Enabled Power-Down OUTPUT CHARACTERISTICS Output Overdrive Recovery Time Output Voltage Swing Short-Circuit Current POWER SUPPLY Operating Range Quiescent Current/Amplifier Quiescent Current (Power-Down)/Amplifier Positive Power Supply Rejection Negative Power Supply Rejection Conditions G = +1, VO = 0.1 V p-p G = +2, VO = 2 V p-p G = +2, VO = 2 V p-p VO = 2 V step G = +2, VO = 2 V step RL = 150 Ω RL = 150 Ω f = 100 kHz f = 100 kHz G = +2, VO = 2 V p-p, RL = 150 Ω, f = 5 MHz Min Typ 100 35 22 54 120 0.22 0.10 22 2.2 −66 1 1.6 1.0 4 60 80 0.5/20 0.6 −0.2 to +VCC − 1.2 40 −88 1.2 1.5 120 40 0.01 55 0.1 to 4.8 160/120 5 1.8 1.5 50 4.1 1.7 Max Unit MHz MHz MHz ns V/μs % Degrees nV/√Hz pA/√Hz dB mV μV/°C μA nA/°C nA dB MΩ pF V ns dB V μs ns μA μA ns V mA V mA μA dB dB 93 VO = 0.5 V to 4.5 V Differential/common mode 72 VIN = −0.5 V to +5.5 V, G = +1 VCM = 0 V to 3 V Power-down −71 Power-down = 5 V Power-down = 0 V VIN = −0.25 V to +2.75 V, G = +2 RL = 75 Ω Sinking/sourcing 0.55 to 4.5 2.65 Power-down = low +VS = +2.5 V to +3.5 V, −VS = −2.5 V −VS = −2.5 V to −3.5 V, +VS = +2.5 V 1.4 0.1 −80 −80 −75 −75 Rev. C | Page 4 of 16 ADA4853-1/ADA4853-2/ADA4853-3 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Power Dissipation Common-Mode Input Voltage Differential Input Voltage Storage Temperature Range Operating Temperature Range 6-Lead SC70 16-Lead LFCSP_VQ 14-Lead TSSOP Lead Temperature Junction Temperature Rating 5.5 V See Figure 6 −VS − 0.2 V to +VS − 1.2 V ±VS −65°C to +125°C −40°C to +85°C −40°C to +105°C −40°C to +105°C JEDEC J-STD-20 150°C The power dissipated in the package (PD) for a sine wave and a resistor load is the total power consumed from the supply minus the load power. PD = Total Power Consumed − Load Power PD = VSUPPLY VOLTAGE × I SUPPLY CURRENT – RMS output voltages should be considered. ( ) VOUT 2 RL Airflow increases heat dissipation, effectively reducing θJA. In addition, more metal directly in contact with the package leads and through holes under the device reduces θJA. Figure 6 shows the maximum safe power dissipation in the package vs. the ambient temperature for the 6-lead SC70 (430°C/W), the 14-lead TSSOP (120°C/W), and the 16-lead LFCSP_VQ (63°C/W) on a JEDEC standard 4-layer board. θJA values are approximations. 3.0 MAXIMUM POWER DISSIPATION (W) 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. 2.5 2.0 LFCSP 1.5 TSSOP 1.0 THERMAL RESISTANCE θJA is specified for the worst-case conditions, that is, θJA is specified for the device soldered in the circuit board for surface-mount packages. Table 4. Package Type 6-Lead SC70 16-Lead LFCSP_VQ 14-Lead TSSOP θJA 430 63 120 Unit °C/W °C/W °C/W 0.5 SC70 –55 –35 –15 5 25 45 65 85 105 125 05884-059 0 AMBIENT TEMPERATURE (°C) Figure 6. Maximum Power Dissipation vs. Temperature for a 4-Layer Board Maximum Power Dissipation The maximum safe power dissipation for the ADA4853-1/ ADA4853-2/ADA4853-3 is limited by the associated rise in junction temperature (TJ) on the die. At approximately 150°C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric performance of the amplifiers. Exceeding a junction temperature of 150°C for an extended period can result in changes in silicon devices, potentially causing degradation or loss of functionality. ESD CAUTION Rev. C | Page 5 of 16 ADA4853-1/ADA4853-2/ADA4853-3 TYPICAL PERFORMANCE CHARACTERISTICS 2 5 ADA4853-3 LFCSP G = –1* CLOSED-LOOP GAIN (dB) NORMALIZED CLOSED-LOOP GAIN (dB) 1 0 –1 4 3 2 1 0 –1 –2 –3 –4 –5 VS = 5V RL = 150Ω VOUT = 0.1V p-p G = +1 CL = 10pF/25Ω SNUB CL = 10pF CL = 5pF G = +2* G = +10* –2 –3 *ADA4853-1/ADA4853-2 –4 –5 –6 0.1 VS = 5V RL = 150Ω VOUT = 0.1V p-p 1 10 FREQUENCY (MHz) 100 200 05884-006 CL = 0pF RSNUB CL 1 RL 10 FREQUENCY (MHz) 100 200 05884-009 –6 0.1 Figure 7. Small Signal Frequency Response for Various Gains 3 2 CLOSED-LOOP GAIN (dB) Figure 10. Small Signal Frequency Response for Various Capacitive Loads 6.5 VS = 5V G = +1 VOUT = 0.1V p-p RL = 75Ω 6.4 6.3 VS = 5V RL = 150Ω G = +2 0.1V p-p CLOSED-LOOP GAIN (dB) 1 0 –1 –2 –3 –4 –5 1 10 FREQUENCY (MHz) 100 200 05884-007 6.2 6.1 6.0 5.9 5.8 5.7 5.6 1 FREQUENCY (MHz) 10 40 05884-010 05884-060 RL = 1kΩ RL = 150Ω 2.0V p-p –6 0.1 5.5 0.1 Figure 8. Small Signal Frequency Response for Various Loads 4 3 2 CLOSED-LOOP GAIN (dB) Figure 11. 0.5 dB Flatness Response for Various Output Voltages 8.0 G = +1 RL = 150Ω VOUT = 0.1V p-p VS = 3V VS = 5V 7.8 RL = 150Ω G = +2 7.6 CLOSED-LOOP GAIN (dB) 7.4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 2V p-p 1 0 –1 –2 –3 –4 –5 1 10 FREQUENCY (MHz) 0.1V p-p VS = 5V 100 200 05884-008 –6 0.1 5.6 0.1 1 10 FREQUENCY (MHz) 100 1000 Figure 9. Small Signal Frequency Response for Various Supplies Figure 12. ADA4853-3 LFCSP_VQ Flatness Response for Various Output Voltages Rev. C | Page 6 of 16 ADA4853-1/ADA4853-2/ADA4853-3 1 G = –1 NORMALIZED CLOSED-LOOP GAIN (dB) 4 3 G = +2 2 CLOSED-LOOP GAIN (dB) 0 –1 –2 –3 –4 –5 VS = 5V RL = 150Ω VOUT = 2V p-p 1 10 FREQUENCY (MHz) 100 200 G = +10 VS = 5V RL = 150Ω VOUT = 0.1V p-p G = +1 +85°C +25°C 1 0 –1 –2 –3 –4 –5 –40°C 05884-011 1 10 FREQUENCY (MHz) 100 200 Figure 13. Large Signal Frequency Response for Various Gains 7 6 Figure 16. Small Signal Frequency Response for Various Temperatures 250 VS = 5V RL = 150Ω G = +2 NEGATIVE SLEW RATE CLOSED-LOOP GAIN (dB) RL= 75Ω 5 RL= 150Ω 4 3 2 200 RL= 1kΩ SLEW RAT E (V/µs) 150 100 POSITIVE SLEW RATE 50 1 VS = 5V VOUT = 2V p-p G = +2 1 10 FREQUENCY (MHz) 100 200 05884-012 0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE STEP (V) 3.5 4.0 Figure 14. Large Signal Frequency Response for Various Loads 5 4 3 Figure 17. Slew Rate vs. Output Voltage 140 120 100 PHASE 80 60 GAIN 40 20 0 05884-013 CLOSED-LOOP GAIN (dB) 1 0 –1 –2 –3 –4 –5 –6 0.1 1 10 FREQUENCY (MHz) 100 200 –40°C OPEN-LOOP GAIN (dB) 2 –60 –90 –120 –150 –180 –210 –240 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) Figure 15. Small Signal Frequency Response for Various Temperatures Figure 18. Open-Loop Gain and Phase vs. Frequency Rev. C | Page 7 of 16 05884-029 –20 100 OPEN-LOOP PHASE (Degrees) VS = 3V RL = 150Ω VOUT = 0.1V p-p G = +1 +85°C +25°C VS = 5V RL = 150Ω 0 –30 05884-015 0 0.1 0 05884-014 –6 0.1 –6 0.1 ADA4853-1/ADA4853-2/ADA4853-3 –20 –30 –40 –50 –60 –70 –80 –90 100 VS = 5V CLOSED-LOOP OUTPUT IMPEDANCE (Ω) 10M VS = 5V G = +1 ADA4853-1/ ADA4853-2 COMMON-MODE REJECTION (dB) 1M 100k ADA4853-3 10k 1k 100 05884-030 1k 10k 100k 1M 10M 100M 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) Figure 19. Common-Mode Rejection vs. Frequency 0 –10 POWER SUPPLY REJECTION (dB) –40 –50 Figure 22. Output Impedance vs. Frequency Disabled VS = 5V GAIN = +2 RTO –PSR HARMONIC DISTORTION (dBc) G = +2 VS = 3V VOUT = 2V p-p –20 –30 –40 –50 –60 –70 –80 –90 05884-031 RL = 150Ω HD2 RL = 150Ω HD3 –60 –70 –80 –90 –100 +PSR RL = 1kΩ HD3 RL = 1kΩ HD2 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) 1 FREQUENCY (MHz) 10 Figure 20. Power Supply Rejection vs. Frequency 1000 CLOSED-LOOP OUTPUT IMPEDANCE (Ω) –40 –50 Figure 23. Harmonic Distortion vs. Frequency VS = 5V G = +1 G = +2 VS = 5V VOUT = 2V p-p RL = 150Ω HD3 HARMONIC DISTORTION (dBc) 100 –60 –70 –80 –90 –100 –110 05884-017 10 RL = 150Ω HD2 RL = 1kΩ HD3 1 RL = 1kΩ HD2 0.1 05884-032 0.01 100 1k 10k 100k 1M 10M 100M –120 0.1 FREQUENCY (Hz) 1 FREQUENCY (MHz) 10 Figure 21. Output Impedance vs. Frequency Enabled Figure 24. Harmonic Distortion vs. Frequency Rev. C | Page 8 of 16 05884-016 –100 100 –110 0.1 05884-050 10 100 ADA4853-1/ADA4853-2/ADA4853-3 –40 –50 G = +1 VS = 5V VOUT = 2V p-p 2.60 RL = 150Ω HD3 2.58 2.56 G = +2 RL = 150Ω 25ns/DIV VS = 3V HARMONIC DISTORTION (dBc) RL = 150Ω HD2 –70 –80 –90 –100 RL = 1kΩ HD2 –110 –120 0.1 RL = 1kΩ HD3 05884-018 OUTPUT VOLTAGE (V) –60 RL = 75Ω HD2 RL = 75Ω HD3 2.54 2.52 2.50 2.48 2.46 2.44 2.42 05884-033 VS = 5V 1 FREQUENCY (MHz) 10 2.40 Figure 25. Harmonic Distortion vs. Frequency –30 Figure 28. Small Signal Pulse Response for Various Supplies 2.60 2.58 2.56 G = +1; CL = 5pF G = +2 VOUT = 2V p-p –40 RL = 75Ω HARMONIC DISTORTION (dBc) OUTPUT VOLTAGE (V) –50 VS = 3V HD3 –60 –70 –80 –90 –100 0.1 VS = 5V HD2 VS = 3V HD2 VS = 5V HD3 2.54 2.52 2.50 2.48 2.46 2.44 05884-034 G = +2; CL = 0pF, 5pF, 10pF 2.42 VS = 5V RL = 150Ω 25ns/DIV 1 FREQUENCY (MHz) 10 05884-051 2.40 Figure 26. Harmonic Distortion vs. Frequency –40 –50 HARMONIC DISTORTION (dBc) Figure 29. Small Signal Pulse Response for Various Capacitive Loads 3.75 G = +1 VS = 5V RL = 150Ω f = 100kHz 2V 5V 3.50 3.25 G = +2 RL = 150Ω 25ns/DIV VS = 3V, 5V OUTPUT VOLTAGE (V) –60 –70 –80 –90 –100 HD2 GND 3.00 2.75 2.50 2.25 2.00 1.75 05884-019 HD3 –120 0 1 2 VOUT (V p-p) 3 4 1.50 1.25 Figure 27. Harmonic Distortion for Various Output Voltages Figure 30. Large Signal Pulse Response for Various Supplies Rev. C | Page 9 of 16 05884-035 –110 ADA4853-1/ADA4853-2/ADA4853-3 3.75 3.50 3.25 G = +2 VS = 5V RL = 150Ω 25ns/DIV 1000 3.00 2.75 2.50 2.25 2.00 1.75 1.50 1.25 VOLTAGE NOISE (nV/ Hz) 05884-036 OUTPUT VOLTAGE (V) CL = 0pF, 20pF 100 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 31. Large Signal Pulse Response for Various Capacitive Loads 5.5 2 × INPUT 100 Figure 34. Voltage Noise vs. Frequency INPUT AND OUTPUT VOLTAGE (V) 4.5 OUTPUT 3.5 VS = 5V G = +2 RL = 150Ω f = 1MHz CURRENT NOISE (pA/ Hz) 2.5 10 1.5 0.5 05884-020 100ns/DIV 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 32. Output Overdrive Recovery 5.5 INPUT 20 18 16 14 12 Figure 35. Current Noise vs. Frequency INPUT AND OUTPUT VOLTAGE (V) 4.5 OUTPUT 3.5 VS = 5V G = +1 RL = 150Ω f = 1MHz VS = 5V N = 155 x = –0.370mV σ = 0.782 COUNT 2.5 10 8 6 4 2 1.5 0.5 05884-021 100ns/DIV –3 –2 –1 0 VOS (mV) 1 2 3 4 Figure 33. Input Overdrive Recovery Figure 36. VOS Distribution Rev. C | Page 10 of 16 05884-042 –0.5 0 –4 05884-038 –0.5 1 10 05884-037 10 10 ADA4853-1/ADA4853-2/ADA4853-3 –0.6 VS = 5V –0.8 INPUT BIAS CURRENT (µA) –0.50 –0.52 –0.54 –0.56 –0.58 –0.60 –0.62 –0.64 –0.66 05884-027 05884-040 05884-039 –1.0 VOS (mV) VS = 5V –1.2 –1.4 –1.6 –1.8 05884-022 +IB VS = 3V –IB –2.0 –1.0 –0.5 0 0.5 1.0 1.5 2.0 VCM (V) 2.5 3.0 3.5 4.0 4.5 –0.68 –40 –20 0 20 40 60 80 TEMPERATURE (°C) Figure 37. VOS vs. Common-Mode Voltage 1.5 3.0 Figure 40. Input Bias Current vs. Temperature VS = 5V, T = +85°C VS = 3V 2.8 POSITIVE SWING LOAD RESISTANCE TIED TO MIDSUPPLY VS = 5V, T = –40°C SUPPLY CURRENT (mA) OUTPUT VOLTAGE (V) VS = 5V, T = +25°C 1.0 VS = 3V, T = –40°C VS = 3V, T = +25°C VS = 3V, T = +85°C 0.5 2.6 2.4 0.6 0.4 0.2 NEGATIVE SWING 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 POWER DOWN VOLTAGE (V) 4.0 4.5 5.0 05884-023 0 0 1 10 100 LOAD RESISTANCE (Ω) 1k 10k Figure 38. Supply Current vs. POWER DOWN Voltage –0.6 5.0 Figure 41. Output Voltage vs. Load Resistance VS = 5V INPUT OFFSET VOLTAGE (mV) –0.7 VS = 5V 4.8 POSITIVE SWING LOAD RESISTANCE TIED TO MIDSUPPLY OUTPUT VOLTAGE (V) 05884-026 4.6 VS = 3V –0.8 4.4 0.6 0.4 –0.9 0.2 NEGATIVE SWING 0 10 100 1k 10k –1.0 –50 –25 0 25 50 TEMPERATURE (°C) 75 100 LOAD RESISTANCE (Ω) Figure 39. Input Offset Voltage vs. Temperature Figure 42. Output Voltage vs. Load Resistance Rev. C | Page 11 of 16 ADA4853-1/ADA4853-2/ADA4853-3 3.0 2.9 2.8 OUTPUT VOLTAGE (V) OUTPUT SATURATION VOLTAGE (V) VS = 3V 0.25 RL = 150Ω +VSAT VS = 5V 2.7 2.6 2.5 0.5 0.4 0.3 0.2 0.1 5 POSITIVE SWING 0.20 0.15 0.10 VS = 3V –VSAT NEGATIVE SWING 0.05 10 15 20 25 30 35 40 45 –20 0 20 40 60 80 LOAD CURRENT (mA) TEMPERATURE (°C) Figure 43. Output Voltage vs. Load Current 5.0 4.9 4.8 OUTPUT VOLTAGE (V) Figure 45. Output Saturation Voltage vs. Temperature for Various Supplies 3.0 3.1 2.9 VS = 5V RL = 150Ω 2VINPUT VS = 5V VOUTPUT 2.7 VOLTAGE (V) 4.6 4.5 0.5 0.4 0.3 0.2 0.1 05884-052 2.6 2.5 2.4 2.3 2VINPUT – VOUTPUT +0.001 (+0.1%) –0.001 (–0.1%) NEGATIVE SWING 2.2 2.1 2.0 0 5 10 15 20 25 30 35 40 45 50 0 LOAD CURRENT (mA) 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TIME (ns) Figure 44. Output Voltage vs. Load Current Figure 46. 0.1% Settling Time Rev. C | Page 12 of 16 05884-045 0 1.9 2VINPUT – VOUTPUT (V) 4.7 POSITIVE SWING 2.8 05884-053 0 50 05884-041 0 0 –40 ADA4853-1/ADA4853-2/ADA4853-3 6 POWER DOWN 5 4 3 2 1 0 –1 G = +2 VS = 5V fIN = 100kHz 0 1 2 3 4 5 TIME (µs) 6 7 8 9 10 0 VOUT ADA4853-1/ ADA4853-2 1 VOUT ADA4853-3 3 0 INPUT-TO-OUTPUT ISOLATION (dB) POWER DOWN PIN VOLTAGE (V) –20 VS = 5V RL = 150Ω VIN = 1V p-p G = +2 OUTPUT VOLTAGE (V) 2 –40 –60 –80 05884-046 1 10 FREQUENCY (MHz) 100 200 Figure 47. Enable/Disable Time –40 Figure 49. Input-to-Output Isolation, Chip Disabled –50 VS = 5V G = +2 RL = 150Ω VOUT = 2V p-p CROSSTALK (dB) –60 VOUT2 TO VOUT1 ADA4853-2 –70 VOUT1 TO VOUT2 ADA4853-2 –80 ADA4853-3 ALL HOSTILE –90 1M 10M FREQUENCY (Hz) 100M 200M Figure 48. Crosstalk vs. Frequency Rev. C | Page 13 of 16 05884-054 –100 100k 05884-055 –100 0.1 ADA4853-1/ADA4853-2/ADA4853-3 CIRCUIT DESCRIPTION The ADA4853-1/ADA4853-2/ADA4853-3 feature a high slew rate input stage that is a true single-supply topology capable of sensing signals at or below the minus supply rail. The rail-torail output stage can pull within 100 mV of either supply rail when driving light loads and within 200 mV when driving 150 Ω. High speed performance is maintained at supply voltages as low as 2.65 V. For signals approaching the negative supply, inverting gain, and high positive gain configurations, the headroom limit is the output stage. The ADA4853-1/ADA4853-2/ADA4853-3 use a common-emitter output stage. This output stage maximizes the available output range, limited by the saturation voltage of the output transistors. The saturation voltage increases with the drive current that the output transistor is required to supply due to the output transistor’s collector resistance. As the saturation point of the output stage is approached, the output signal shows increasing amounts of compression and clipping. For the input headroom case, higher frequency signals require a bit more headroom than the lower frequency signals. Figure 27 illustrates this point by plotting the typical distortion vs. the output amplitude. HEADROOM CONSIDERATIONS The ADA4853-1/ADA4853-2/ADA4853-3 are designed for use in low voltage systems. To obtain optimum performance, it is useful to understand the behavior of the amplifiers as input and output signals approach their headroom limits. The amplifiers’ input common-mode voltage range extends from the negative supply voltage (actually 200 mV below this) to within 1.2 V of the positive supply voltage. Exceeding the headroom limits is not a concern for any inverting gain on any supply voltage, as long as the reference voltage at the amplifiers’ positive input lies within the amplifiers’ input common-mode range. The input stage is the headroom limit for signals approaching the positive rail. Figure 50 shows a typical offset voltage vs. the input common-mode voltage for the ADA4853-1/ADA4853-2/ ADA4853-3 on a 5 V supply. Accurate dc performance is maintained from approximately 200 mV below the negative supply to within 1.2 V of the positive supply. For high speed signals, however, there are other considerations. As the common-mode voltage gets within 1.2 V of positive supply, the amplifier responds well but the bandwidth begins to drop as the common-mode voltage approaches the positive supply. This can manifest itself in increased distortion or settling time. Higher frequency signals require more headroom than the lower frequencies to maintain distortion performance. –0.6 VS = 5V –0.8 –1.0 OVERLOAD BEHAVIOR AND RECOVERY Input The specified input common-mode voltage of the ADA4853-1/ ADA4853-2/ADA4853-3 is 200 mV below the negative supply to within 1.2 V of the positive supply. Exceeding the top limit results in lower bandwidth and increased rise time. Pushing the input voltage of a unity-gain follower to less than 1.2 V from the positive supply leads to an increasing amount of output error as well as increased settling time. The recovery time from input voltages 1.2 V or closer to the positive supply is approximately 40 ns; this is limited by the settling artifacts caused by transistors in the input stage coming out of saturation. The amplifiers do not exhibit phase reversal, even for input voltages beyond the voltage supply rails. Going more than 0.6 V beyond the power supplies turns on protection diodes at the input stage, greatly increasing the current draw of the devices. VOS (mV) –1.2 –1.4 –1.6 –1.8 05884-022 –2.0 –1.0 –0.5 0 0.5 1.0 1.5 2.0 VCM (V) 2.5 3.0 3.5 4.0 4.5 Figure 50. VOS vs. Common-Mode Voltage, VS = 5 V Rev. C | Page 14 of 16 ADA4853-1/ADA4853-2/ADA4853-3 APPLICATIONS INFORMATION SINGLE-SUPPLY VIDEO AMPLIFIER With low differential gain and phase errors and wide 0.5 dB flatness, the ADA4853-1/ADA4853-2/ADA4853-3 are ideal solutions for portable video applications. Figure 51 shows a typical video driver set for a noninverting gain of +2, where RF = RG = 1 kΩ. The video amplifier input is terminated into a shunt 75 Ω resistor. At the output, the amplifier has a series 75 Ω resistor for impedance matching to the video load. When operating in low voltage, single-supply applications, the input signal is only limited by the input stage headroom. RF +VS C1 2.2µF + RG PD U1 VIN C2 0.01µF V LAYOUT As is the case with all high speed applications, careful attention to printed circuit board (PCB) layout details prevents associated board parasitics from becoming problematic. The ADA4853-1/ ADA4853-2/ADA4853-3 can operate at up to 100 MHz; therefore, proper RF design techniques must be employed. The PCB should have a ground plane covering all unused portions of the component side of the board to provide a low impedance return path. Removing the ground plane on all layers from the area near and under the input and output pins reduces stray capacitance. Signal lines connecting the feedback and gain resistors should be kept as short as possible to minimize the inductance and stray capacitance associated with these traces. Termination resistors and loads should be located as close as possible to their respective inputs and outputs. Input and output traces should be kept as far apart as possible to minimize coupling (crosstalk) through the board. Adherence to microstrip or stripline design techniques for long signal traces (greater than 1 inch) is recommended. For more information on high speed board layout, go to: www.analog.com to view A Practical Guide to High-Speed Printed-Circuit-Board Layout. 75Ω 75Ω CABLE VOUT 05884-043 75Ω Figure 51. Video Amplifier POWER SUPPLY BYPASSING Attention must be paid to bypassing the power supply pins of the ADA4853-1/ADA4853-2/ADA4853-3. High quality capacitors with low equivalent series resistance (ESR), such as multilayer ceramic capacitors (MLCCs), should be used to minimize supply voltage ripple and power dissipation. A large, usually tantalum, 2.2 μF to 47 μF capacitor located in proximity to the ADA4853-1/ADA4853-2/ADA4853-3 is required to provide good decoupling for lower frequency signals. The actual value is determined by the circuit transient and frequency requirements. In addition, 0.1 μF MLCC decoupling capacitors should be located as close to each of the power supply pins as is physically possible, no more than ⅛ inch away. The ground returns should terminate immediately into the ground plane. Locating the bypass capacitor return close to the load return minimizes ground loops and improves performance. Rev. C | Page 15 of 16 ADA4853-1/ADA4853-2/ADA4853-3 OUTLINE DIMENSIONS 2.20 2.00 1.80 2.40 2.10 1.80 5.10 5.00 4.90 1.35 1.25 1.15 PIN 1 1.30 BSC 1.00 0.90 0.70 6 1 5 2 4 3 14 8 4.50 4.40 4.30 1 7 6.40 BSC 0.65 BSC 1.10 0.80 0.40 0.10 0.46 0.36 0.26 PIN 1 1.05 1.00 0.80 0.65 BSC 1.20 MAX 0.15 0.05 0.30 0.19 0.10 MAX 0.30 0.15 0.10 COPLANARITY SEATING PLANE 0.22 0.08 0.20 0.09 SEATING COPLANARITY PLANE 0.10 8° 0° 0.75 0.60 0.45 COMPLIANT TO JEDEC STANDARDS MO-203-AB COMPLIANT TO JEDEC STANDARDS MO-153-AB-1 Figure 52. 6-Lead Thin Shrink Small Outline Transistor Package [SC70] (KS-6)—Dimensions shown in millimeters 3.00 BSC SQ 0.45 PIN 1 INDICATOR TOP VIEW 2.75 BSC SQ 0.50 BSC 12° MAX 0.90 0.85 0.80 SEATING PLANE 0.30 0.23 0.18 0.80 MAX 0.65 TYP 0.05 MAX 0.02 NOM 0.20 REF 1.50 REF Figure 53. 14-Lead Thin Shrink Small Outline Package [TSSOP] (RU-14)—Dimensions shown in millimeters 0.50 0.40 0.30 0.60 MAX PIN 1 INDICATOR *1.65 1.50 SQ 1.35 13 12 16 EXPOSED PAD 1 9 (BOTTOM VIEW) 4 8 5 0.25 MIN *COMPLIANT TO JEDEC STANDARDS MO-220-VEED-2 EXCEPT FOR EXPOSED PAD DIMENSION. Figure 54. 16-Lead Lead Frame Chip Scale Package [LFCSP_VQ] 3 mm × 3 mm Body, Very Thin Quad (CP-16-3)—Dimensions shown in millimeters ORDERING GUIDE Model ADA4853-1AKSZ-R21 ADA4853-1AKSZ-R71 ADA4853-1AKSZ-RL1 ADA4853-2YCPZ-R21 ADA4853-2YCPZ-RL1 ADA4853-2YCPZ-RL71 ADA4853-3YCPZ-R21 ADA4853-3YCPZ-RL1 ADA4853-3YCPZ-R71 ADA4853-3YRUZ1 ADA4853-3YRUZ-RL1 ADA4853-3YRUZ-R71 1 Temperature Range –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C Package Description 6-Lead Thin Shrink Small Outline Transistor Package (SC70) 6-Lead Thin Shrink Small Outline Transistor Package (SC70) 6-Lead Thin Shrink Small Outline Transistor Package (SC70) 16-Lead Lead Frame Chip Scale Package (LFCSP_VQ) 16-Lead Lead Frame Chip Scale Package (LFCSP_VQ) 16-Lead Lead Frame Chip Scale Package (LFCSP_VQ) 16-Lead Lead Frame Chip Scale Package (LFCSP_VQ) 16-Lead Lead Frame Chip Scale Package (LFCSP_VQ) 16-Lead Lead Frame Chip Scale Package (LFCSP_VQ) 14-Lead Thin Shrink Small Outline Package (TSSOP) 14-Lead Thin Shrink Small Outline Package (TSSOP) 14-Lead Thin Shrink Small Outline Package (TSSOP) Ordering Quantity 250 3,000 10,000 250 5,000 1,500 250 5,000 1,500 96 2,500 1,000 Package Option KS-6 KS-6 KS-6 CP-16-3 CP-16-3 CP-16-3 CP-16-3 CP-16-3 CP-16-3 RU-14 RU-14 RU-14 Branding HEC HEC HEC H0H H0H H0H H0L H0L H0L Z = RoHS Compliant Part. ©2006–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05884-0-10/07(C) Rev. C | Page 16 of 16