EL1503A| Datasheet

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EL1503A
Data Sheet March 26, 2007 FN7039.2

High Power Differential Line Driver
The EL1503A ADSL Line Driver contains two wideband high-voltage drivers which are ideally suited for both ADSL and HDSL2 applications. They can supply a 39.2VP-P signal into a 22 load while exhibiting very low distortion. The EL1503A also has a number of power saving features. The IADJ pin can be used to set the maximum supply current and the C0 and C1 pins can be used to digitally vary the supply current to one of four modes. These modes include full power, low power, terminate only and power down. The EL1503A uses current-feedback type amplifiers, which achieve a high slew rate while consuming moderate power. They retain their frequency response over a wide range of externally set gains. The EL1503A operates on 5V to 12V supplies and consumes only 12.5mA per amplifier. The device is supplied in a thermally-enhanced 20 Ld SOIC (0.300") and the small footprint (4x5mm) 24 Ld QFN packages. Center pins on each side of the 20 Ld and 16 Ld packages are used as ground connections and heat spreaders. The QFN pack
age has the potential for a low JA (<40 C/W) and dissipates heat by means of a thermal pad that is soldered onto the PCB. All package options are specified for operation over the full -40 C to +85 C temperature range.

Features
High power ADSL driver 39.2VP-P differential output drive into 22 42.4VP-P differential output drive into 65 Driver 2nd/3rd harmonics of -66dBc/-72dBc at 2VP-P into 100 differential Supply current of 12.5mA per amplifier Supply current control Power saving modes Standard surface-mount packages Ultra-small QFN package Pb-free plus anneal available (RoHS compliant)

Applications
ADSL line drivers HDSL2 line drivers Video distribution amplifiers

Pinouts
EL1503A (24 LD QFN) TOP VIEW
20 VOUTB 24 VOUTA 23 VIN-A 21 VIN-B

EL1503A [20 LD SOIC (0.300")] TOP VIEW
VIN-A 1 VOUTA 2 19 NC 18 NC 17 VS+ VS- 3 A GND* 4 GND* 5 GND* 6 GND* 7 VIN+A 8 C1 9 C0 10 POWER CONTROL LOGIC
+ +

20 VIN-B 19 VOUTB 18 VS+ B 17 GND* 16 GND* 15 GND* 14 GND* 13 VIN+B 12 IADJ 11 NC

NC 1 NC 2 VS- 3 NC 4 NC 5 NC 6 GND 7 C0 10 VIN+B 12 VIN+A 8 IADJ 11 C1 9 THERMAL PAD

22 NC

16 NC 15 NC 14 NC 13 GND

*GND pins are heat spreaders

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