EL1519. Features. Medium Power Differential Line Driver. Applications. Ordering Information. Pinout. Data Sheet April 10, 2007 FN7017.

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1 EL59 Data Sheet April, 7 FN77. Medium Power Differential Line Driver The EL59 is a dual operational amplifier designed for customer premise line driving in DMT ADSL solutions. This device features a high drive capability of 5mA while consuming only 7.mA of supply current per amplifier and operating from a single 5V to V supply. This driver achieves a typical distortion of less than -5dBc, at 5kHz into a 5Ω load. The EL59 is available in the industry standard Ld SO. This device is optimized to use low feedback resistor values to minimize noise in ADSL systems. The EL59 is ideal for ADSL, SDSL, HDSL and VDSL line driving applications. Ordering Information PART NUMBER PART MARKING TAPE & REEL PACKAGE PKG. DWG. # Features Drives up to 5mA from a +V supply V P-P differential output drive into Ω -5dBc typical driver output distortion at full output at 5kHz 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, HDSL line driver Video distribution amplifier Video twisted-pair line driver EL59CS 59CS - Ld SO MDP7 EL59CS-T7 59CS 7" Ld SO MDP7 EL59CS-T 59CS " Ld SO MDP7 EL59CSZ (See Note) EL59CSZ-T7 (See Note) EL59CSZ-T (See Note) 59CSZ - Ld SO (Pb-Free) 59CSZ 7" Ld SO (Pb-Free) 59CSZ " Ld SO (Pb-Free) MDP7 MDP7 MDP7 NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and % 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-. Pinout VS OUTB INB- INB+ OUTA INA- INA+ GND EL59 ( LD SO) TOP VIEW CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. --INTERSIL or Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc., 7. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.

2 EL59 Absolute Maximum Ratings (T A = +5 C) V S + Voltage to Ground V to +.V V IN + Voltage GND to V S + Current into any Input ma Continuous Output Current mA Thermal Information Operating Temperature Range C to +5 C Storage Temperature Range C to +5 C Operating Junction Temperature C to +5 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: T J = T C = T A Electrical Specifications V S = ±V, R F = 75Ω, R L = Ω connected to mid supply, T A = +5 C. Unless otherwise specified. PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT AC PERFORMANCE BW -db Bandwidth A V = + 7 MHz HD Total Harmonic Distortion f = 5kHz, V O =Vp-p, R L =5Ω -5 dbc dg Differential Gain A V = +, R L = 7.5Ω.5 % dθ Differential Phase A V = +, R L = 7.5Ω. SR Slewrate V OUT from -V to +V 75 5 V/µS DC PERFORMANCE V OS Offset Voltage - mv ΔV OS V OS Mismatch - mv R OL Transimpedance V OUT from -.5V to +.5V.7..5 MΩ INPUT CHARACTERISTICS I B + Non-Inverting Input Bias Current - µa I B - Inverting Input Bias Current - µa e N Input Noise Voltage.7 nv Hz i N -Input Noise Current pa/ Hz OUTPUT CHARACTERISTICS V OUT Loaded Output Swing (single ended) R L = Ω to GND, V S = ±V ±. ±5 V R L = 5Ω to GND, V S = ±V ±. ±.7 V I OUT Output Current R L = Ω 5 ma SUPPLY V S Supply Voltage Single Supply 5 V I S Supply Current All Outputs at Mid Supply. ma FN77. April, 7

3 EL59 A V = R F =5Ω R F =5Ω GAIN (db) RR F =kω F GAIN (db) R F =kω K M M M K M M M FIGURE. DIFFERENTIAL FREQUENCY RESPONSE vs R F FIGURE. DIFFERENTIAL FREQUENCY RESPONSE vs R F C L =pf C L =pf 55 5 GAIN (db) C L =pf BW (MHz) 7 9 K M M M ±V S (V) FIGURE. DIFFERENTIAL FREQUENCY RESPONSE vs C L FIGURE. DIFFERENTIAL BANDWIDTH vs SUPPLY VOLTAGE HD (db) V S =±.5V f=mhz HD HD PEAKING (db) V OP-P (V) FIGURE 5. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE ±V S (V) FIGURE. DIFFERENTIAL PEAKING vs SUPPLY VOLTAGE FN77. April, 7

4 EL59 HD (db) f=mhz HD HD THD (db) V S =±.5V f=5khz V OP-P (V) V OP-P (V) FIGURE 7. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE FIGURE. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE THD (db) V S =±.5V V f=mhz ISOLATION (db) B A A B V OP-P (V) - K K M M M FIGURE 9. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT VOLTAGE FIGURE. CHANNEL ISOLATION vs FREQUENCY VOLTAGE NOISE (nv/ Hz), CURRENT NOISE (pa/ Hz) M PSRR (db) K IB- E N IB+ K K K M M PSRR- K PSRR+ M M M FIGURE. VOLTAGE AND CURRENT NOISE vs FREQUENCY FIGURE. POWER SUPPLY REJECTION vs FREQUENCY FN77. April, 7

5 EL59 OUTPUT IMPEDANCE (Ω).. A V = R F =.5kΩ MAGNITUDE (Ω) M M K K K GAIN PHASE K K M M M K K K M M - M FIGURE. OUTPUT IMPEDANCE vs FREQUENCY FIGURE. TRANSIMEDANCE (ROL) vs FREQUENCY..5 PHASE ( ) DIFFERENTIAL GAIN (%), DIFFERENTIAL PHASE ( ) GAIN PHASE SUPPLY CURRENT (ma).5 5 NUMBER OF 5Ω LOADS FIGURE 5. DIFFERENTIAL GAIN AND DIFFERENTIAL PHASE FIGURE. SUPPY CURRENT vs TEMPERATURE INPUT BIAS CURRENT (µa) IB- - IB OUTPUT VOLTAGE (±V) FIGURE 7. INPUT BIAS CURRENT vs TEMPERATURE FIGURE. OUTPUT VOLTAGE vs TEMPERATURE 5 FN77. April, 7

6 EL SLEW RATE (V/µs) I S (ma) ±V S (V) FIGURE 9. SLEW RATE vs TEMPERATURE FIGURE. SUPPLY CURRENT vs SUPPLY VOLTAGE 7 OFFSET VOLTAGE (mv) TRANSIMPEDANCE (MΩ) FIGURE. OFFSET VOLTAGE vs TEMPERATURE FIGURE. TRANSIMPEDANCE vs TEMPERATURE 9pF pf R F =5Ω pf pf R F =kω pf K M M M (Hz) A V = K M M M (Hz) FIGURE. DIFFERENTIAL FREQUENCY RESPONSE vs C L FIGURE. DIFFERENTIAL FREQUENCY RESPONSE vs R F FN77. April, 7

7 EL59 R F =5Ω R F =kω POWER DISSIPATION (W) JEDEC JESD5- LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD.. 7mW.... SO θ JA = C/W K M M M (Hz) AMBIENT FIGURE 5. DIFFERENTIAL FREQUENCY RESPONSE vs R F FIGURE. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE JEDEC JESD5-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY (-LAYER) TEST BOARD.5 POWER DISSIPATION (W) W SO C/W AMBIENT FIGURE 7. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE Applications Information Product Description The EL59 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 EL59 closed-loop db bandwidth is dependent on the value of the feedback resistor. First the desired bandwidth is selected by choosing the feedback resistor, R F, and then the gain is set by picking the gain resistor, R G. The curves at the beginning of the section show the effect of varying both R F and R G. The db bandwidth is somewhat dependent on the power supply voltage. 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 /. The power supply pins must be well bypassed to reduce the risk of oscillation. A.µF tantalum capacitor in parallel with a.µf 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. 7 FN77. April, 7

8 EL59 Capacitance at the Inverting Input Due to the topology of the current feedback amplifier, stray capacitance at the inverting input will affect the AC and transient performance of the EL59 when operating in the non-inverting configuration. 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 EL59 has been designed and specified with for A V = +5. This value of feedback resistor yields extremely flat frequency response with little to no peaking out to 5MHz. 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 section which show db bandwidth and peaking vs. frequency for various feedback resistors and various supply voltages. Bandwidth vs Temperature Whereas many amplifier's supply current and consequently db bandwidth drop off at high temperature, the EL59 was designed to have little supply current variations with temperature. An immediate benefit from this is that the db bandwidth does not drop off drastically with temperature. Supply Voltage Range The EL59 has been designed to operate with supply voltages from ±.5V to ±V. Optimum bandwidth, slew rate, and video characteristics are obtained at higher supply voltages. However, at ±.5V supplies, the db bandwidth at A V = + is a respectable MHz. Single Supply Operation If a single supply is desired, values from +5V to +V can be used as long as the input common mode range is not exceeded. When using a single supply, be sure to either ) DC bias the inputs at an appropriate common mode voltage and AC couple the signal, or ) ensure the driving signal is within the common mode range of the EL59. ADSL CPE Applications The EL59 is designed as a line driver for ADSL CPE modems. It is capable of outputting 5mA of output current with a typical supply voltage headroom of.v. It can achieve -5dBc of distortion at low 7.mA of supply current per amplifier. The average line power requirement for the ADSL CPE application is dbm (mw) into a Ω line. The average line voltage is.v RMS. The ADSL DMT peak to average ratio (crest factor) of 5. 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 : is selected. The circuit configuration is as shown below AFE + - K Ω.5 TX : K All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9 quality systems. Intersil Corporation s quality certifications can be viewed at 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 FN77. April, 7

9 EL59 Small Outline Package Family (SO) A D h X 5 N (N/)+ E E PIN # I.D. MARK c A SEE DETAIL X B. M C A B (N/) L C e H A SEATING PLANE GAUGE PLANE.. C. M C A B b A DETAIL X L ± MDP7 SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SO SO (. ) SO SO SO SYMBOL SO- SO- (.5 ) (SOL-) (SOL-) (SOL-) (SOL-) TOLERANCE NOTES A MAX - A ±. - A ±. - b ±. - c ±. - D ±., E ±. - E ±., e Basic - L ±.9 - L Basic - h Reference - N Reference - Rev. M /7 NOTES:. Plastic or metal protrusions of. maximum per side are not included.. Plastic interlead protrusions of. maximum per side are not included.. Dimensions D and E are measured at Datum Plane H.. Dimensioning and tolerancing per ASME Y.5M-99 9 FN77. April, 7

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