DATASHEET
EL1508
Differential DSL Line Driver
The EL1508 is designed for driving full rate ADSL signals in
both CO and CPE applications at very low power dissipation.
The high drive capability of 450mA makes this driver ideal
for both CAP and DMT designs. It contains two wideband,
high-voltage, current mode feedback amplifiers with a
number of power dissipation reduction features.
These drivers achieve an MTPR distortion measurement of
better than 70dB, while consuming typically 6mA of total
supply current. This supply current can be set using a
resistor on the I
ADJ
pin. Two other pins (C
0
and C
1
) can
also be used to adjust supply current to one of four pre-set
modes (full-I
S
, 2/3-I
S
, 1/3-I
S
, and full power-down). The
EL1508 operates on ±5V to ±12V supplies and retains its
bandwidth and linearity over the complete supply range.
The device is supplied in a thermally-enhanced 20 Ld SOIC
(0.300”), a thermally-enhanced 16 Ld SOIC (0.150”), and the
small footprint (4x5mm) 24 Ld QFN packages. The EL1508
is specified for operation over the full -40°C to +85°C
temperature range.
FN7014
Rev 5.00
March 26, 2007
Features
• 450mA output drive capability
• 43.6V
P-P
differential output drive into 100
• 2
nd
/3
rd
harmonics of -85dBc/-75dBc
• MTPR of -70dB
• Operates down to 3mA per amplifier supply current
• Power control features
• Pin-compatible with EL1503
• Pb-free plus anneal available (RoHS compliant)
Applications
• ADSL line driver
• HDSL line driver
• Video distribution amplifier
• Video twisted-pair line driver
Pinouts
EL1508
[20 LD SOIC (0.300”)]
TOP VIEW
VIN-A 1
VOUTA 2
VS- 3
GND* 4
GND* 5
GND* 6
GND* 7
VIN+A 8
C1 9
C0 10
POWER
CONTROL
LOGIC
+ -
- +
A
B
20 VIN-B
19 VOUTB
18 VS+
17 GND*
16 GND*
15 GND*
14 GND*
13 VIN+B
12 IADJ
11 NC
EL1508
[16 LD SOIC (0.150”)]
TOP VIEW
24 VOUTA
VIN-A 1
VOUTA 2
VS- 3
GND* 4
GND* 5
VIN+A 6
C1 7
C0 8
POWER
CONTROL
LOGIC
+ -
- +
16 VIN-B
15 VOUTB
14 VS+
13 GND*
12 GND*
11 VIN+B
10 IADJ
9 NC
NC 1
NC 2
VS- 3
NC 4
NC 5
NC 6
GND 7
EL1508
(24 LD QFN)
TOP VIEW
20 VOUTB
19 NC
18 NC
17 VS+
THERMAL
PAD
16 NC
15 NC
14 NC
13 GND
C0 10
VIN+B 12
VIN+A 8
IADJ 11
C1 9
23 VIN-A
21 VIN-B
*GND PINS ARE HEAT SPREADERS
FN7014 Rev 5.00
March 26, 2007
22 NC
Page 1 of 18
EL1508
Ordering Information
PART NUMBER
EL1508CS
EL1508CS-T7
EL1508CS-T13
EL1508CSZ (See Note)
EL1508CSZ-T7 (See Note)
EL1508CSZ-T13 (See Note)
EL1508CM
EL1508CM-T13
EL1508CMZ (See Note)
EL1508CMZ-T13 (See Note)
EL1508CL
EL1508CL-T7
EL1508CL-T13
EL1508CLZ (See Note)
EL1508CLZ-T7 (See Note)
EL1508CLZ-T13 (See Note)
PART MARKING
EL1508CS
EL1508CS
EL1508CS
EL1508CSZ
EL1508CSZ
EL1508CSZ
EL1508CM
EL1508CM
EL1508CMZ
EL1508CMZ
1508CL
1508CL
1508CL
1508CLZ
1508CLZ
1508CLZ
TAPE & REEL
-
7”
13”
-
7”
13”
-
13”
-
13”
-
7”
13”
-
7”
13”
PACKAGE
16 Ld SOIC (0.150”)
16 Ld SOIC (0.150”)
16 Ld SOIC (0.150”)
16 Ld SOIC (0.150”) (Pb-Free)
16 Ld SOIC (0.150”) (Pb-Free)
16 Ld SOIC (0.150”) (Pb-Free)
20 Ld SOIC (0.300”)
20 Ld SOIC (0.300”)
20 Ld SOIC (0.300”) (Pb-Free)
20 Ld SOIC (0.300”) (Pb-Free)
24 Ld QFN
24 Ld QFN
24 Ld QFN
24 Ld QFN (Pb-Free)
24 Ld QFN (Pb-Free)
24 Ld QFN (Pb-Free)
PKG. DWG. #
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0027
MDP0046
MDP0046
MDP0046
MDP0046
MDP0046
MDP0046
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.
FN7014 Rev 5.00
March 26, 2007
Page 2 of 18
EL1508
Absolute Maximum Ratings
(T
A
= 25°C)
V
S
+ to V
S
- Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V
V
S
+ Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V
V
S
- Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . -28V to 0.3V
Driver V
IN
+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
S
- to V
S
+
C
0
, C
1
Voltage to GND . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
I
ADJ
Voltage to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 4V
Current into any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA
Output Current from Driver (Static) . . . . . . . . . . . . . . . . . . . . 100mA
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. Typ 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
PARAMETER
SUPPLY CHARACTERISTICS
I
S
+ (Full I
S
)
I
S
- (Full I
S
)
I
S
+ (2/3 I
S
)
I
S
- (2/3 I
S
)
I
S
+ (1/3 I
S
)
I
S
- (1/3 I
S
)
I
S
+ (6.8k)
I
S
- (6.8k)
I
S
+ (Power-down)
I
S
- (Power-down)
I
GND
V
S
= ±12V, R
F
= 2.2k, R
L
= 65, I
ADJL
= C
0
= C
1
= 0V, T
A
= 25°C. Amplifiers tested separately.
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
Positive Supply Current per Amplifier
Negative Supply Current per Amplifier
Positive Supply Current per Amplifier
Negative Supply Current per Amplifier
Positive Supply Current per Amplifier
Negative Supply Current per Amplifier
Positive Supply Current per Amplifier
Negative Supply Current per Amplifier
Positive Supply Current per Amplifier
Negative Supply Current per Amplifier
GND Supply Current per Amplifier
All outputs at 0V, C
0
= C
1
= 0V
All outputs at 0V, C
0
= C
1
= 0V
All outputs at 0V, C
0
= 5V, C
1
= 0V
All outputs at 0V, C
0
= 5V, C
1
= 0V
All outputs at 0V, C
0
= 0V, C
1
= 5V
All outputs at 0V, C
0
= 0V, C
1
= 5V
All outputs at 0V, C
0
= C
1
= 0V,
R
ADJ
= 6.8k
All outputs at 0V, C
0
= C
1
= 0V,
R
ADJ
= 6.8k
All outputs at 0V, C
0
= C
1
= 5V
All outputs at 0V, C
0
= C
1
= 5V
All outputs at 0V
10
-9.5
7
-6
3.75
-2.75
3
-3.75
0.75
0
14.5
-13.5
10
-9
5.25
-4.25
3.75
-2.9
1.2
-0.25
1
18
-17.5
12.5
-12
7
-6
4.5
-2.25
2
-2
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
INPUT CHARACTERISTICS
V
OS
V
OS
I
B
+
I
B
-
I
B
-
R
OL
e
N
i
N
V
IH
V
IL
I
IH1
I
IH0
I
IL
Input Offset Voltage
V
OS
Mismatch
Non-Inverting Input Bias Current
Inverting Input Bias Current
I
B
- Mismatch
Transimpedance
Input Noise Voltage
-Input Noise Current
Input High Voltage
Input Low Voltage
Input High Current for C
1
Input High Current for C
0
Input Low Current for C
0
or C
1
C
0
and C
1
inputs
C
0
and C
1
inputs
C
1
= 5V
C
0
= 5V
C
0
= 0V, C
1
= 0V
1
0.5
-1
2
1
2.25
0.8
6
3
1
-10
-5
-15
-50
-25
1.1
0
2.9
3.5
13
1
0
10
5
15
50
25
5
mV
mV
µA
µA
µA
M
nV/
Hz
pA/
Hz
V
V
µA
µA
µA
FN7014 Rev 5.00
March 26, 2007
Page 3 of 18
EL1508
Electrical Specifications
PARAMETER
OUTPUT CHARACTERISTICS
V
OUT
Loaded Output Swing
R
L
= 100
R
L
= 25
I
OL
I
OUT
Linear Output Current
Output Current
A
V
= 5, R
L
= 10, f = 100kHz,
THD = -60dBc
V
OUT
= 1V, R
L
= 1
±10.6
±9.8
±10.8
±10.2
450
1
±11.5
±10.6
V
V
mA
A
V
S
= ±12V, R
F
= 2.2k, R
L
= 65, I
ADJL
= C
0
= C
1
= 0V, T
A
= 25°C. Amplifiers tested separately.
(Continued)
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
DYNAMIC PERFORMANCE
BW
HD2
-3 dB Bandwidth
2nd Harmonic Distortion
A
V
= +5
f
C
= 1MHz, R
L
= 100V
OUT
= 2V
P-P
f
C
= 1MHz, R
L
= 25V
OUT
= 2V
P-P
HD3
3rd Harmonic Distortion
f
C
= 1MHz, R
L
= 100V
OUT
= 2V
P-P
f
C
= 1MHz, R
L
= 25V
OUT
= 2V
P-P
MTPR
SR
Multi-Tone Power Ratio
Slewrate
26kHz to 1.1MHz, R
LINE
= 100,
P
LINE
= 20.4dBM
V
OUT
from -8V to +8V measured at ±4V
450
80
-90
-80
-90
-75
-70
600
800
MHz
dBc
dBc
dBc
dBc
dBc
V/µs
FN7014 Rev 5.00
March 26, 2007
Page 4 of 18
EL1508
Pin Descriptions
16 Ld SOIC
(0.150")
1
20 Ld SOIC
(0.300")
1
24 Ld QFN
23
PIN NAME
VIN-A
FUNCTION
Channel A Inverting Input
CIRCUIT
CIRCUIT 1
2
3
4, 5
6
2
3
4, 5, 6, 7
8
24
3
7
8
VOUTA
VS-
GND
VIN+A
Channel A Output
Negative Supply
Ground Connection
Channel A Non-inverting Input
V
S
+
(Reference Circuit 1)
V
S
-
CIRCUIT 2
7
9
9
C1
Current Control Bit 1
V
S
+
6.7V
CIRCUIT 3
8
9
10
10
11
12
10
1, 2, 4, 5, 6, 14,
15, 16, 18, 19, 22
11
C0
NC
IADJ
Current Control Bit 2
Not Connected
Supply Current Control Pin
V
S
+
(Reference Circuit 3)
I
ADJ
GND
CIRCUIT 4
11
12, 13
14
15
16
13
14, 15, 16, 17
18
19
20
12
13
17
20
21
VIN+B
GND
VS+
VOUTB
VIN-B
Channel B Non-inverting Input
Ground Connection
Positive Supply
Channel B Output
Channel B Inverting Input
(Reference Circuit 1)
(Reference Circuit 1)
(Reference Circuit 2)
FN7014 Rev 5.00
March 26, 2007
Page 5 of 18
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