EL1519 ® Data Sheet April 10, 2007 FN7017.2 Medium Power Differential Line Driver Features The EL1519 is a dual operational amplifier designed for customer premise line driving in DMT ADSL solutions. This device features a high drive capability of 250mA while consuming only 7.1mA of supply current per amplifier and operating from a single 5V to 12V supply. This driver achieves a typical distortion of less than -85dBc, at 150kHz into a 25Ω load. The EL1519 is available in the industry standard 8 Ld SO. This device is optimized to use low feedback resistor values to minimize noise in ADSL systems. • Drives up to 250mA from a +12V supply The EL1519 is ideal for ADSL, SDSL, HDSL2 and VDSL line driving applications. • 20VP-P differential output drive into 100Ω • -85dBc typical driver output distortion at full output at 150kHz • Low quiescent current of 7.5mA per amplifier • Pb-Free Plus Anneal Available (RoHS Compliant) Applications • ADSL G.lite CO line driving • ADSL full rate CPE line driving • G.SHDSL, HDSL2 line driver Ordering Information PART NUMBER PART MARKING TAPE & REEL PACKAGE PKG. DWG. # EL1519CS 1519CS - 8 Ld SO MDP0027 EL1519CS-T7 1519CS 7" 8 Ld SO MDP0027 EL1519CS-T13 1519CS 13" 8 Ld SO MDP0027 EL1519CSZ (See Note) 1519CSZ - 8 Ld SO (Pb-Free) MDP0027 EL1519CSZ-T7 (See Note) 1519CSZ 7" 8 Ld SO (Pb-Free) MDP0027 EL1519CSZ-T13 (See Note) 1519CSZ 13" 8 Ld SO (Pb-Free) MDP0027 • Video distribution amplifier • Video twisted-pair line driver Pinout EL1519 (8 LD SO) TOP VIEW OUTA 1 INA- 2 8 VS - 7 OUTB + INA+ 3 6 INB- NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 1 GND 4 + 5 INB+ CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2004, 2007. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. EL1519 Absolute Maximum Ratings (TA = +25°C) Thermal Information VS+ Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . -0.3V to +14.6V VIN+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to VS+ Current into any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA Operating Temperature Range . . . . . . . . . . . . . . . . .-40°C to +85°C Storage Temperature Range . . . . . . . . . . . . . . . . . .-60°C to +150°C Operating Junction Temperature . . . . . . . . . . . . . . .-40°C to +150°C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves 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. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA Electrical Specifications PARAMETER VS = ±12V, RF = 750Ω, RL = 100Ω connected to mid supply, TA = +25°C. Unless otherwise specified. DESCRIPTION CONDITIONS MIN TYP MAX UNIT AC PERFORMANCE BW -3dB Bandwidth AV = +4 70 MHz HD Total Harmonic Distortion f = 150kHz, VO =16Vp-p, RL=25Ω -85 dBc dG Differential Gain AV = +2, RL = 37.5Ω 0.15 % dθ Differential Phase AV = +2, RL = 37.5Ω 0.1 ° SR Slewrate VOUT from -3V to +3V 350 V/µS 275 DC PERFORMANCE VOS Offset Voltage -20 20 mV ΔVOS VOS Mismatch -10 10 mV ROL Transimpedance 2.5 MΩ VOUT from -4.5V to +4.5V 0.7 1.4 INPUT CHARACTERISTICS IB+ Non-Inverting Input Bias Current -3 3 µA IB- Inverting Input Bias Current -30 30 µA eN Input Noise Voltage 2.7 nV√ Hz iN -Input Noise Current 18 pA/√ Hz OUTPUT CHARACTERISTICS VOUT IOUT Loaded Output Swing (single ended) RL = 100Ω to GND, VS = ±6V ±4.8 ±5 V RL = 25Ω to GND, VS = ±6V ±4.4 ±4.7 V 450 mA Output Current RL = 0Ω VS Supply Voltage Single Supply IS Supply Current All Outputs at Mid Supply SUPPLY 2 5 14.2 12 V 18 mA FN7017.2 April 10, 2007 EL1519 Typical Performance Curves 28 GAIN (dB) 20 16 RR F=1kΩ F=1kΩ AV=5 VS=±6V RL=100Ω 18 RF=500Ω RF=750Ω RF=500Ω RF=750Ω GAIN (dB) 24 22 AV=10 VS=±6V RL=100Ω 14 RF=1kΩ 10 12 6 8 100K 1M 10M 2 100K 100M 1M FREQUENCY (Hz) FIGURE 1. DIFFERENTIAL FREQUENCY RESPONSE vs RF CL=22pF 51 AV=5 RF=750Ω RL=100Ω CL=10pF BW (MHz) GAIN (dB) 55 AV=5 VS=±6V RL=100Ω RF=750Ω 14 CL=0pF 10 6 47 43 39 2 100K 1M 10M 35 2.5 100M 3 3.5 -45 4 VS=±2.5V AV=5 RF=750Ω -55 RL=100Ω f=1MHz 3 -65 HD3 -75 HD2 2.5 3 3.5 4 4.5 5 5.5 VOP-P (V) FIGURE 5. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE 3 5 5.5 6 AV=5 RF=750Ω RL=100Ω 2 1 0 -1 -85 2 4.5 FIGURE 4. DIFFERENTIAL BANDWIDTH vs SUPPLY VOLTAGE PEAKING (dB) HD (dB) FIGURE 3. DIFFERENTIAL FREQUENCY RESPONSE vs CL 1.5 4 ±VS (V) FREQUENCY (Hz) 1 100M FIGURE 2. DIFFERENTIAL FREQUENCY RESPONSE vs RF 22 18 10M FREQUENCY (Hz) -2 2.5 3 3.5 4 4.5 5 5.5 6 ±VS (V) FIGURE 6. DIFFERENTIAL PEAKING vs SUPPLY VOLTAGE FN7017.2 April 10, 2007 EL1519 Typical Performance Curves -45 -45 VS=±6V AV=5 RF=750Ω RL=100Ω f=1MHz -55 HD (dB) -60 AV=5 RF=750Ω RL=100Ω f=150kHz -50 -55 THD (dB) -50 -65 -70 HD3 -75 -60 VS=±2.5V -65 -70 -75 -80 VS=±6V -80 HD2 -85 -85 -90 -90 1 3 5 7 9 11 15 13 17 19 1 3 5 7 FIGURE 7. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE 11 13 15 17 19 21 FIGURE 8. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE -45 -10 AV=5V RF=750Ω RL=100Ω f=1MHz -55 -30 ISOLATION (dB) -50 THD (dB) 9 VOP-P (V) VOP-P (V) -60 VS=±2.5V -65 VS=±6V -70 -50 B→A -70 A→B -90 -75 -80 1 3 5 7 9 11 13 15 17 -110 10K 19 100K VOP-P (V) FIGURE 9. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE 10M 100M FIGURE 10. CHANNEL ISOLATION vs FREQUENCY 30 100 10 IBPSRR (dB) VOLTAGE NOISE (nV/√Hz), CURRENT NOISE (pA/√Hz) 1M FREQUENCY (Hz) 10 -10 -30 PSRR- EN -50 PSRR+ IB+ 1 10 100 1K 10K 100K 1M 10M 100M FREQUENCY (Hz) FIGURE 11. VOLTAGE AND CURRENT NOISE vs FREQUENCY 4 -70 10K 100K 1M 10M 100M FREQUENCY (Hz) FIGURE 12. POWER SUPPLY REJECTION vs FREQUENCY FN7017.2 April 10, 2007 EL1519 Typical Performance Curves 10 10M VS=±6V AV=1 RF=1.5kΩ 50 1 0.1 -50 PHASE 100K -100 -150 10K -200 0.01 1K -250 0.001 10K 100K 10M 1M 100M 100 100 1K 10K FREQUENCY (Hz) 10M -300 100M 14.5 SUPPLY CURRENT (mA) PHASE (°) DIFFERENTIAL GAIN (%), DIFFERENTIAL PHASE (°) 1M FIGURE 14. TRANSIMEDANCE (ROL) vs FREQUENCY 0.06 0.05 0.04 GAIN 0.03 PHASE 0.02 0.01 0 1 2 3 4 14 13.5 13 12.5 -50 0 5 -25 0 FIGURE 15. DIFFERENTIAL GAIN AND DIFFERENTIAL PHASE 5.15 OUTPUT VOLTAGE (±V) 5.2 8 6 IB- 2 0 -2 50 75 100 125 150 FIGURE 16. SUPPY CURRENT vs TEMPERATURE 10 4 25 TEMPERATURE (°C) NUMBER OF 150Ω LOADS IB+ -4 -6 RL=100Ω 5.1 50.5 5 4.95 4.9 4.85 -8 -10 -50 100K FREQUENCY (Hz) FIGURE 13. OUTPUT IMPEDANCE vs FREQUENCY INPUT BIAS CURRENT (µA) 0 GAIN 1M MAGNITUDE (Ω) OUTPUT IMPEDANCE (Ω) 100 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) FIGURE 17. INPUT BIAS CURRENT vs TEMPERATURE 5 4.8 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) FIGURE 18. OUTPUT VOLTAGE vs TEMPERATURE FN7017.2 April 10, 2007 EL1519 520 16 510 14 500 12 490 10 IS (mA) SLEW RATE (V/µs) Typical Performance Curves 480 8 470 6 460 4 450 2 440 -50 0 -25 0 25 50 75 100 125 150 0 1 2 3 4 5 6 7 ±VS (V) TEMPERATURE (°C) FIGURE 19. SLEW RATE vs TEMPERATURE FIGURE 20. SUPPLY CURRENT vs SUPPLY VOLTAGE 3 7 TRANSIMPEDANCE (MΩ) OFFSET VOLTAGE (mV) 6 5 4 3 2 1 0 -1 2.5 2 1.5 1 0.5 -2 -3 -50 -25 0 25 50 75 100 125 150 0 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 21. OFFSET VOLTAGE vs TEMPERATURE FIGURE 22. TRANSIMPEDANCE vs TEMPERATURE 22 AV=5 VS=±6V RL=100Ω RF=750Ω 39pF RF=500Ω 20 30pF 18 RF=750Ω 22pF 16 10pF 0pF 100K 1M 10M 14 100M (Hz) FIGURE 23. DIFFERENTIAL FREQUENCY RESPONSE vs CL 6 RF=1kΩ AV=10 VS=±6V RL=100Ω 12 100K 1M 10M 100M (Hz) FIGURE 24. DIFFERENTIAL FREQUENCY RESPONSE vs RF FN7017.2 April 10, 2007 EL1519 Typical Performance Curves 1.4 AV=5 VS=±6V RL=100Ω POWER DISSIPATION (W) RF=500Ω RF=750Ω RF=1kΩ 100K 1M 10M 100M (Hz) JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 1.2 1 0.8 781mW θJ 0.6 SO A =1 60 0.4 8 °C /W 0.2 0 0 25 50 75 85 100 125 150 AMBIENT TEMPERATURE (°C) FIGURE 25. DIFFERENTIAL FREQUENCY RESPONSE vs RF FIGURE 26. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY (4-LAYER) TEST BOARD POWER DISSIPATION (W) 3.5 3 2.5 2 1.5 1.136W SO8 110° C /W 1 0.5 0 0 25 75 85 100 50 125 150 AMBIENT TEMPERATURE (°C) FIGURE 27. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE Applications Information Product Description The EL1519 is a dual operational amplifier designed for customer premise line driving in DMT ADSL solutions. It is a dual current mode feedback amplifier with low distortion while drawing moderately low supply current. It is built using Elantec's proprietary complimentary bipolar process and is offered in industry standard pin-outs. Due to the current feedback architecture, the EL1519 closed-loop 3dB bandwidth is dependent on the value of the feedback resistor. First the desired bandwidth is selected by choosing the feedback resistor, RF, and then the gain is set by picking the gain resistor, RG. The curves at the beginning of the Typical Performance Curves section show the effect of varying both RF and RG. The 3dB bandwidth is somewhat dependent on the power supply voltage. 7 Power Supply Bypassing and Printed Circuit Board Layout As with any high frequency device, good printed circuit board layout is necessary for optimum performance. Ground plane construction is highly recommended. Lead lengths should be as short as possible, below 1/4”. The power supply pins must be well bypassed to reduce the risk of oscillation. A 1.0µF tantalum capacitor in parallel with a 0.01µF ceramic capacitor is adequate for each supply pin. For good AC performance, parasitic capacitances should be kept to a minimum, especially at the inverting input. This implies keeping the ground plane away from this pin. Carbon resistors are acceptable, while use of wire-wound resistors should not be used because of their parasitic inductance. Similarly, capacitors should be low inductance for best performance. FN7017.2 April 10, 2007 EL1519 Capacitance at the Inverting Input Supply Voltage Range Due to the topology of the current feedback amplifier, stray capacitance at the inverting input will affect the AC and transient performance of the EL1519 when operating in the non-inverting configuration. The EL1519 has been designed to operate with supply voltages from ±2.5V to ±6V. Optimum bandwidth, slew rate, and video characteristics are obtained at higher supply voltages. However, at ±2.5V supplies, the 3dB bandwidth at AV = +2 is a respectable 40MHz. In the inverting gain mode, added capacitance at the inverting input has little effect since this point is at a virtual ground and stray capacitance is therefore not “seen” by the amplifier. Feedback Resistor Values The EL1519 has been designed and specified with RF=750Ω for AV = +5. This value of feedback resistor yields extremely flat frequency response with little to no peaking out to 50MHz. As is the case with all current feedback amplifiers, wider bandwidth, at the expense of slight peaking, can be obtained by reducing the value of the feedback resistor. Inversely, larger values of feedback resistor will cause rolloff to occur at a lower frequency. See the curves in the Typical Performance Curves section which show 3dB bandwidth and peaking vs. frequency for various feedback resistors and various supply voltages. Bandwidth vs Temperature Whereas many amplifier's supply current and consequently 3dB bandwidth drop off at high temperature, the EL1519 was designed to have little supply current variations with temperature. An immediate benefit from this is that the 3dB bandwidth does not drop off drastically with temperature. Single Supply Operation If a single supply is desired, values from +5V to +12V can be used as long as the input common mode range is not exceeded. When using a single supply, be sure to either 1) DC bias the inputs at an appropriate common mode voltage and AC couple the signal, or 2) ensure the driving signal is within the common mode range of the EL1519. ADSL CPE Applications The EL1519 is designed as a line driver for ADSL CPE modems. It is capable of outputting 250mA of output current with a typical supply voltage headroom of 1.3V. It can achieve -85dBc of distortion at low 7.1mA of supply current per amplifier. The average line power requirement for the ADSL CPE application is 13dBm (20mW) into a 100Ω line. The average line voltage is 1.41VRMS. The ADSL DMT peak to average ratio (crest factor) of 5.3 implies peak voltage of 7.5V into the line. Using a differential drive configuration and transformer coupling with standard back termination, a transformer ratio of 1:2 is selected. The circuit configuration is as shown below. + - 12.5 1K TX1 338Ω 1:2 AFE 100 + - 12.5 1K All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 8 FN7017.2 April 10, 2007 EL1519 Small Outline Package Family (SO) A D h X 45° (N/2)+1 N A PIN #1 I.D. MARK E1 E c SEE DETAIL “X” 1 (N/2) B L1 0.010 M C A B e H C A2 GAUGE PLANE SEATING PLANE A1 0.004 C 0.010 M C A B L b 0.010 4° ±4° DETAIL X MDP0027 SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL SO-14 SO16 (0.300”) (SOL-16) SO20 (SOL-20) SO24 (SOL-24) SO28 (SOL-28) TOLERANCE NOTES A 0.068 0.068 0.068 0.104 0.104 0.104 0.104 MAX - A1 0.006 0.006 0.006 0.007 0.007 0.007 0.007 ±0.003 - A2 0.057 0.057 0.057 0.092 0.092 0.092 0.092 ±0.002 - b 0.017 0.017 0.017 0.017 0.017 0.017 0.017 ±0.003 - c 0.009 0.009 0.009 0.011 0.011 0.011 0.011 ±0.001 - D 0.193 0.341 0.390 0.406 0.504 0.606 0.704 ±0.004 1, 3 E 0.236 0.236 0.236 0.406 0.406 0.406 0.406 ±0.008 - E1 0.154 0.154 0.154 0.295 0.295 0.295 0.295 ±0.004 2, 3 e 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Basic - L 0.025 0.025 0.025 0.030 0.030 0.030 0.030 ±0.009 - L1 0.041 0.041 0.041 0.056 0.056 0.056 0.056 Basic - h 0.013 0.013 0.013 0.020 0.020 0.020 0.020 Reference - 16 20 24 28 Reference - N SO-8 SO16 (0.150”) 8 14 16 Rev. M 2/07 NOTES: 1. Plastic or metal protrusions of 0.006” maximum per side are not included. 2. Plastic interlead protrusions of 0.010” maximum per side are not included. 3. Dimensions “D” and “E1” are measured at Datum Plane “H”. 4. Dimensioning and tolerancing per ASME Y14.5M-1994 9 FN7017.2 April 10, 2007