ADA4311-1ARHZ-RL

Low Cost, Dual, High Current Output Line Driver with Shutdown ADA4311-1 FEATURES PIN CONFIGURATION ADA4311-1 +VS 1 9 –IN B OUT A 3 8 +IN B –IN A 4 7 PD1 +IN A 5 6 PD0 NC = NO CONNECT Figure 1. Thermally Enhanced, 10-Lead MINI_SO_EP TYPICAL APPLICATION 1/2 ADA4311-1 VMID* APPLICATIONS 1/2 ADA4311-1 *VMID = VCC – GND 2 06940-002 Home networking line drivers Twisted pair line drivers Power line communications (PLC) Video line drivers ARB line drivers I/Q channel amplifiers 10 OUT B NC 2 06940-001 High speed −3 dB bandwidth: 310 MHz, G = +5, RLOAD = 50 Ω Slew rate: 1050 V/μs, RLOAD = 50 Ω Wide output swing 20.6 V p-p differential, RLOAD of 100 Ω from 12 V supply High output current Low distortion −98 dBc typical at 1 MHz, VOUT = 2 V p-p, G = +5, RLOAD = 100 Ω −72 dBc typical at 10 MHz, VOUT = 2 V p-p, G = +5, RLOAD = 100 Ω Power management and shutdown Control inputs CMOS level compatible Shutdown quiescent current: 1 mA/amplifier Selectable quiescent current: 1 mA to 11.8 mA/amplifier Figure 2. Typical PLC Driver Application GENERAL DESCRIPTION The ADA4311-1 is comprised of two high speed, current feedback operational amplifiers. The high output current, high bandwidth, and fast slew rate make it an excellent choice for broadband applications requiring high linearity performance while driving low impedance loads. The ADA4311-1 is available in a thermally enhanced, 10-lead MSOP with an exposed paddle for improved thermal conduction. The ADA4311-1 is rated to work in the extended industrial temperature range of −40°C to +85°C. The ADA4311-1 incorporates a power management function that provides shutdown capabilities and the ability to optimize the quiescent current of the amplifiers. The CMOS-compatible, power-down control pins (PD1 and PD0) enable the ADA4311-1 to operate in four different modes: full power, medium power, low power, and complete power-down. In power-down mode, the quiescent current drops to only 1.0 mA/amplifier, while the outputs go to a high impedance state. Rev. 0 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 ©2007 Analog Devices, Inc. All rights reserved. ADA4311-1 TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 10 Applications....................................................................................... 1 Application Information................................................................ 11 Pin Configuration............................................................................. 1 Feedback Resistor Selection...................................................... 11 Typical Application........................................................................... 1 Power Control Modes of Operation ........................................ 11 General Description ......................................................................... 1 Exposed Thermal Pad Connections ........................................ 11 Revision History ............................................................................... 2 Powerline Application ............................................................... 11 Specifications..................................................................................... 3 Board Layout............................................................................... 12 Absolute Maximum Ratings............................................................ 5 Power Supply Bypassing ............................................................ 12 Thermal Resistance ...................................................................... 5 Outline Dimensions ....................................................................... 13 ESD Caution.................................................................................. 5 Ordering Guide .......................................................................... 13 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 8/07—Revision 0: Initial Version Rev. 0 | Page 2 of 16 ADA4311-1 SPECIFICATIONS VS = 12 V, RF = 499 Ω (@ TA = 25°C, G = +5, RL = 100 Ω to VS/2), unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Full Power Bandwidth Slew Rate NOISE/DISTORTION PERFORMANCE Differential Distortion (Worst Harmonic) Input Voltage Noise Input Current Noise DC PERFORMANCE Input Offset Voltage Input Bias Current Noninverting Input Inverting Input Open-Loop Transimpedance Common-Mode Rejection INPUT CHARACTERISTICS Input Resistance OUTPUT CHARACTERISTICS Single-Ended, +Swing Single-Ended, −Swing Single-Ended, +Swing Single-Ended, −Swing Differential Swing POWER SUPPLY Single Supply Supply Current Test Conditions/Comments Min VOUT = 0.1 V p-p, PD1 = 0, PD0 = 0, RLOAD = 50 Ω VOUT = 0.1 V p-p, PD1 = 0, PD0 = 1, RLOAD = 50 Ω VOUT = 0.1 V p-p, PD1 = 1, PD0 = 0, RLOAD = 50 Ω VOUT = 10.2 V p-p, PD1 = 0, PD0 = 0, RLOAD = 50 Ω VOUT = 2 V p-p, PD1 = 0, PD0 = 0 VOUT = 2 V p-p, PD1 = 0, PD0 = 1 VOUT = 2 V p-p, PD1 = 1, PD0 = 0 Typ Max Unit 310 220 140 12.9 1050 1050 1000 MHz MHz MHz MHz V/μs V/μs V/μs −98 −95 −86 dBc dBc dBc −72 −63 −52 dBc dBc dBc −56 −49 −43 2.4 17 dBc dBc dBc nV/√Hz pA/√Hz fC = 1 MHz, VOUT = 2 V p-p PD1 = 0, PD0 = 0 PD1 = 0, PD0 = 1 PD1 = 1, PD0 = 0 fC = 10 MHz, VOUT = 2 V p-p PD1 = 0, PD0 = 0 PD1 = 0, PD0 = 1 PD1 = 1, PD0 = 0 fC = 20 MHz, VOUT = 2 V p-p PD1 = 0, PD0 = 0 PD1 = 0, PD0 = 1 PD1 = 1, PD0 = 0 f = 100 kHz f = 100 kHz RLOAD = 50 Ω RLOAD = 100 Ω −3 +1 +3 mV −9 −4 4 15 57 −2 +4.5 14 35 62 +3 +16 μA μA MΩ MΩ dB +IN, f < 100 kHz 500 RLOAD = 50 Ω RLOAD = 50 Ω RLOAD = 100 Ω RLOAD = 100 Ω RLOAD = 100 Ω 11 11 20.2 PD1 = 0, PD0 = 0 PD1 = 0, PD0 = 1 PD1 = 1, PD0 = 0 PD1 = 1, PD0 = 1 10.5 7 4.3 Rev. 0 | Page 3 of 16 11.1 0.9 11.1 0.8 20.6 12 11.8 7.9 5.2 0.9 kΩ 1 0.9 13 9 6.3 1.3 VP VP VP VP V p-p V mA/amp mA/amp mA/amp mA/amp ADA4311-1 Parameter POWER-DOWN PINS PD1, PD0 Threshold High Level Input Voltage, VIH Low Level Input Voltage, VIL PD1, PD0 = 0 Pin Bias Current PD1, PD0 = 1 Pin Bias Current Enable/Disable Time Power Supply Rejection Ratio Test Conditions/Comments Min Referenced to GND −63 Rev. 0 | Page 4 of 16 Max 1.5 2 0 −1.5 40 PD1 or PD0 = 0 V PD1 or PD0 = 3 V Typ −0.2 63 130/116 −70 5 0.8 +1.5 80 Unit V V V μA μA ns dB ADA4311-1 ABSOLUTE MAXIMUM RATINGS Maximum Power Dissipation Table 2. Parameter Supply Voltage Power Dissipation Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering 10 sec) Junction Temperature Rating 13.6 V (TJMAX − TA)/θJA −65°C to +125°C −40°C to +85°C 300°C 150°C 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. The maximum safe power dissipation for the ADA4311-1 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. Figure 3 shows the maximum safe power dissipation in the package vs. the ambient temperature for the 10-lead MINI_SO_EP (44°C/W) on a JEDEC standard 4-layer board. θJA values are approximations. 5.0 THERMAL RESISTANCE MAXIMUM POWER DISSIPATION (W) 4.5 Thermal resistance (θJA) is specified for the worst-case conditions, that is, θJA is specified for device soldered in circuit board for surface-mount packages. Table 3. θJA 44 Unit °C/W 3.5 MINI_SO_EP-10 3.0 2.5 2.0 1.5 1.0 0.5 0 –35 –15 5 25 45 AMBIENT TEMPERATURE (°C) 65 85 06940-003 Package Type 10-Lead MINI_SO_EP 4.0 Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board ESD CAUTION Rev. 0 | Page 5 of 16 ADA4311-1 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADA4311-1 10 OUT B NC 2 9 –IN B OUT A 3 8 +IN B –IN A 4 7 PD1 +IN A 5 6 PD0 NC = NO CONNECT 06940-004 +VS 1 Figure 4. Pin Configuration Table 4. Pin Function Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 (Exposed Paddle) Mnemonic +VS NC OUT A −IN A +IN A PD0 PD1 +IN B −IN B OUT B GND Description Positive Power Supply Input. No Connection. Amplifier A Output. Amplifier A Inverting Input. Amplifier A Noninverting Input. Power Dissipation Control. Power Dissipation Control. Amplifier B Noninverting Input. Amplifier B Inverting Input. Amplifier B Output. Ground (Electrical Connection Required). Rev. 0 | Page 6 of 16 ADA4311-1 TYPICAL PERFORMANCE CHARACTERISTICS 9 –40 VOUT = 100mV p-p RL = 50Ω 6 PD1, PD0 = 0, 0 0 –3 G = +10 –6 –9 G = +20 –12 –15 1 10 100 1000 FREQUENCY (MHz) PD1, PD0 = 0, 1 –80 PD1, PD0 = 0, 0 –90 –100 –110 –130 0.1 9 PD1, PD0 = 0, 0 –70 HARMONIC DISTORTION (dBc) 3 0 –3 PD1, PD0 = 0, 1 –6 –9 PD1, PD0 = 1, 0 –12 –15 –18 100 10 Figure 8. Differential Harmonic Distortion vs. Frequency –60 VOUT = 100mV p-p RL = 50Ω G = +5 6 1 FREQUENCY (MHz) Figure 5. Small Signal Frequency Response for Various Closed-Loop Gains GAIN (dB) PD1, PD0 = 1, 0 –70 –120 06940-005 –18 –60 06940-008 NORMALIZED GAIN (dB) HARMONIC DISTORTION (dBc) G = +5 3 HD2 HD3 VOUT = 2V p-p RL = 100Ω G = +5 –50 f = 5MHz RL = 100Ω G = +5 HD2 –80 –90 HD3 –100 –110 1 10 100 1000 FREQUENCY (MHz) –120 0.1 06940-006 Figure 6. Small Signal Frequency Response for Various Modes 0.15 –40 G = +5 RL = 50Ω 10ns/DIV VOUT = 2V p-p f = 5MHz G = +5 –50 0.10 0.05 0 –0.05 –0.10 –60 –70 HD2 –80 –90 HD3 –100 –0.15 06940-010 OUTPUT (V) 10 Figure 9. Differential Harmonic Distortion vs. Output Voltage HARMONIC DISTORTION (dBc) 0.20 1 OUTPUT VOLTAGE (V p-p) –0.20 –110 10 100 1000 LOAD RESISTANCE (Ω) Figure 7. Small Signal Transient Response Figure 10. Differential Harmonic Distortion vs. Load Resistance Rev. 0 | Page 7 of 16 06940-022 –24 06940-021 –21 ADA4311-1 RL = 100Ω –45 100k –135 MAGNITUDE 10k –180 1k OUTPUT IMPEDANCE (Ω) –90 10k 100k 1M 10M 100M –270 1G FREQUENCY (Hz) 1M PD1, PD0 = 0, 0 RL = 100Ω 10 100 1000 PD1, PD0 = 1, 1 OUTPUT IMPEDANCE (Ω) 100k –20 –30 –40 –50 10k 1k 100 0.1 1 10 100 1000 FREQUENCY (MHz) 1 0.01 0.1 1 10 100 1000 06940-015 –70 0.01 1G 06940-009 10 –60 06940-011 COMMON-MODE REJECTION (dB) 1 Figure 14. Closed-Loop Output Impedance vs. Frequency –10 FREQUENCY (MHz) Figure 12. Common-Mode Rejection vs. Frequency –10 0.1 FREQUENCY (MHz) Figure 11. Open-Loop Transimpedance and Phase vs. Frequency 0 1 0.01 0.01 06940-007 1k 10 0.1 –225 100 100 PD1, PD0 = 0, 0 100 PHASE (Degrees) PHASE 1M Figure 15. Output Impedance vs. Frequency (Disabled) 100 PD1, PD0 = 0, 0 RL = 100Ω VOLTAGE NOISE (nV/ Hz) –20 –30 +PSR –40 –50 10 –60 –70 0.01 0.1 1 10 100 FREQUENCY (MHz) 1000 06940-012 POWER SUPPLY REJECTION (dB) TRANSIMPEDANCE (Ω) 10M 1000 0 06940-013 100M 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 16. Voltage Noise vs. Frequency Figure 13. Power Supply Rejection vs. Frequency Rev. 0 | Page 8 of 16 100M ADA4311-1 –20 0 PD1, PD0 = 1, 1 –20 CROSSTALK (dB) FEEDTHROUGH (dB) –40 –60 –40 –60 –80 1 10 100 1000 FREQUENCY (MHz) –100 0.1 06940-014 –100 1 10 100 1000 FREQUENCY (Hz) 06940-017 –80 Figure 19. Crosstalk vs. Frequency Figure 17. Feedthrough vs. Frequency 8 12 7 VOUT 11 10 VOUT (p-p) 5 4 3 9 8 VPD1 , VPD0 2 0 0 1 2 3 TIME (1μs/DIV) 4 5 6 6 30 100 1000 LOAD (Ω) Figure 18. Power-Down Turn On/Turn Off Figure 20. Single-Ended Output Swing vs. Load Rev. 0 | Page 9 of 16 06940-020 7 1 06940-016 VOLTAGE (V) 6 ADA4311-1 THEORY OF OPERATION The ADA4311-1 is a dual-current feedback amplifier with high output current capability. With a current feedback amplifier, the current into the inverting input is the feedback signal, and the open-loop behavior is that of a transimpedance, dVO/dIIN or TZ. The open-loop transimpedance is analogous to the open-loop voltage gain of a voltage feedback amplifier. Figure 21 shows a simplified model of a current feedback amplifier. Because RIN is proportional to 1/gm, the equivalent voltage gain is TZ × gm, where gm is the transconductance of the input stage. Basic analysis of the follower with gain circuit yields Because G × RIN