®
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 39.2V
P-P
signal
into a 22Ω load while exhibiting very low distortion. The
EL1503A also has a number of power saving features. The
I
ADJ
pin can be used to set the maximum supply current and
the C
0
and C
1
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 package has the potential for a low
θ
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
• 39.2V
P-P
differential output drive into 22Ω
• 42.4V
P-P
differential output drive into 65Ω
• Driver 2
nd
/3
rd
harmonics of
-66dBc/-72dBc at 2V
P-P
into 100Ω 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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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