intersil ISL1540 DATA SHEET

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ISL1540

PRELIMINARY

Data Sheet February 21, 2006

-52V Dual Channel Differential DSL Line
Driver

The ISL1540 is a -52V dual channel differential amplifier
designed for driving full rate ADSL signals at very low power
dissipation. The high supply voltage allows operation from a
single standard -52V negative battery supply. It contains two
pairs of wideband, high voltage, current mode feedback
amplifiers optimized for lower power consumption and
highest performance in ADSL and ADSL2+ systems. The
line drivers have fixed gain A

= 48 with integrated feedback

V

and gain resistors. Its output clamping circuit eliminates the
requirement for the Zener protection diodes.

These drivers achieve an MTPR distortion measurement of
better than 70dB while consuming typically 3mA per DSL
channel of total supply current.

The ISL1540 is supplied in a thermally-enhanced 8mm x
8mm 32-pin QFN package and is specified for operating
over the full -40°C to +85°C temperature range.

Ordering Information

TAPE

&

PART

NUMBER

ISL1540IR 1540IR 32-Pin QFN

ISL1540IR-T7 1540IR 32-Pin QFN

ISL1540IR-T13 1540IR 32-Pin QFN

ISL1540IRZ
(See Note)

ISL1540IRZ-T7
(See Note)

ISL1540IRZ-T13
(See Note)

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.

PART

MARKING PACKAGE

(8mm x 8mm)

(8mm x 8mm)

(8mm x 8mm)

1540IRZ 32-Pin QFN

(8mm x 8mm)

(Pb-Free)

1540IRZ 32-Pin QFN

(8mm x 8mm)

(Pb-Free)

1540IRZ 32-Pin QFN

(8mm x 8mm)

(Pb-Free)

REEL

13” MDP0046

13” MDP0046

PKG.

DWG. #

- MDP0046

7” MDP0046

- MDP0046

7” MDP0046

FN6113.0

Features

• 200mA output current driving capability

• Operates from a single -40V to -60V power supply

• 800mW per channel total power dissipation

• MTPR of -70dB

•96V

differential output swing

P-P

• Fixed gain, integrated gain resistors

• Current control pins

• Output clamp for lightning and surge protection

• Channel separation

-75dB @ 1MHz

• Pb-free plus anneal available (RoHS compliant)

Applications

• Dual port ADSL and ADSL2+ line drivers

• HDSL, HDSL2, HDSL 4 and SHDSL line drivers

• DSLAM, DLC, MDU/MTU line drivers

• Performance upgrade to Le87213 and Le87213A

Pinout

ISL1540

[32-PIN QFN (8mm x 8mm)]

TOP VIEW

OUTA

VBAT

GND

OUTB

NC

OUTC

NC

32

31

30

29

28

15 26

16ENCD 25 NC

MONCD

24

23

22

21

20

19

18

17

NC

NC

NC

NC

NC

INA

INB

NC

1

2

3

4

5

6

7

8

9

NC

10

11

AB
EN

MONAB

THERMAL

PAD

12

NC

13

GND

14 27

VCC

OUTD

NC

NC

NC

NC

NC

IND

INC

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Copyright © Intersil Americas Inc. 2006. All Rights Reserved.

ISL1540

Absolute Maximum Ratings (T

V

Voltage to GND . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V

CC

V

Voltage to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . -65V to 0.3V

BAT

Driver V

+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . V

IN

ENA Voltage to GND . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V

I

Voltage to GND . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC-2V

ADJ

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

Electrical Specifications V

= 25°C)

A

to 0.0V

BAT

CC

= TC = T

J

= -52V, RF = 10kΩ, RL = 300Ω, VCC = 3.3V, I

BAT

A.

Current into any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA

Output Current from Driver (Static) . . . . . . . . . . . . . . . . . . . . . 50mA

Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves

Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C

Operating Temperature Range . . . . . . . . . . . . . . . . . -40°C to +85°C

Operating Junction Temperature . . . . . . . . . . . . . . .-40°C to +150°C

= EN = 0V, TA = 25°C. Amplifiers tested separately.

ADJ

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

SUPPLY CHARACTERISTICS

I

(Full IS) Negative Supply Current per Amplifier All outputs at 0V, EN = 0V -3 mA

BAT

I

(Power-down) Negative Supply Current per Amplifier All outputs at 0V, EN = 3.3V 50 µA

BAT

INPUT CHARACTERISTICS

V

∆V

OS

OS

Input Offset Voltage -50 +10 +50 mV

VOS Mismatch -5 1 +5 mV

IB+ Non-Inverting Input Bias Current -15 +14 µA

I

- Inverting Input Bias Current -30 +30 µA

B

∆I

-I

B

R

OL

e

N

i

N

V

IH

V

IL

I

IH1

I

IH0

I

IL

- Mismatch -25 0 +25 µA

B

Transimpedance TBD TBD TBD MΩ

Input Noise Voltage TBD nV/√Hz

-Input Noise Current TBD pA/√Hz

Input High Voltage EN & MON inputs, with signal 2 V

Input Low Voltage EN & MON inputs 0.8 V

Input High Current for MON MON = 3.3V 0.05 0.25 5 µA

Input High Current for EN EN = 3.3V 0.05 0.5 5 µA

Input Low Current for C0 or MON EN = 0V, MON = 0V -0.3 0 +0.3 µA

OUTPUT CHARACTERISTICS

V

OUT-Headroom

I

OL

I

OUT

Loaded Output Headroom
(R

Single-ended to GND)

L

V

- V

BAT

OUT

RL = 300Ω 1.5 V

R

= 100Ω (+) 2.3 V

L

R

= 100Ω (-) 3.4 V

L

Linear Output Current AV = 5, RL = 100Ω, f = 100kHz,

THD = -60dBc (10Ω single-ended)

Output Current V

= 1V, RL = 1Ω 1A

OUT

200 mA

DYNAMIC PERFORMANCE

A

V

BW -3dB Bandwidth A

HD2 2nd Harmonic Distortion f

HD3 3rd Harmonic Distortion f

Gain 25kHz to 4MHz 48 V/V

= +48 14 MHz

V

= 1MHz, RL = 300Ω, V

C

f

= 1MHz, RL = 100Ω, V

C

= 1MHz, RL = 300Ω, V

C

= 1MHz, RL = 100Ω, V

f

C

OUT

OUT

OUT

OUT

= 2V

= 2V

= 2V

= 2V

P-P

P-P

P-P

P-P

TBD dBc

TBD dBc

TBD dBc

TBD dBc

2

FN6113.0

February 21, 2006

ISL1540

Electrical Specifications V

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

MTPR Multi-Tone Power Ratio 26kHz to 1.1MHz, R

SR Slewrate (single-ended) V

= -52V, RF = 10kΩ, RL = 300Ω, VCC = 3.3V, I

BAT

P

= 20.4dBM

LINE

from -24V to +24V measured at ±12V 750 V/µs

OUT

= EN = 0V, TA = 25°C. Amplifiers tested separately.

ADJ

LINE

= 600Ω,

-70 dBc

Pin Descriptions

PIN NUMBER PIN NAME PIN DESCRIPTION

1, 2, 3, 4, 5, 8, 9, 12, 19, 20,

21, 22, 23, 25, 26, 28

6 INA Input A

7 INB Input B

10 MONAB Full bias/half bias current control for AB amps

11 EN

13, 30 GND Ground

14 VCC 3.3V supply for bias and logic

15 MONCD Full bias/half bias current control for CD amps

16 EN

17 INC Input C

18 IND Input D

24 OUTD Output D

27 OUTC Output C

29 OUTB Output B

31 VBAT -52 battery voltage

32 OUTA Output A

NC Not connected

AB Enable/disable for AB amps

CD Enable/disable for CD amps

3

FN6113.0

February 21, 2006

Block Diagram

ISL1540

INA

VBAT/2

INB

INC

VBAT/2

IND

10K

10K

10K

10K

LOGIC

CONTROL

AB
EN

MONAB

425

425

+

A

­10K

10K

-

B

+

+

C

­10K

10K

-

D

+

CONTROL

LOGIC

CD
EN

MONCD

OUTA

OUTB

OUTC

OUTD

4

FN6113.0

February 21, 2006

Typical Performance Curves

ISL1540

VCC= +3.3V

= -52V

V

BAT

= +48

A

V

RL=1kΩ

RL=200Ω

FIGURE 1. FREQUENCY RESPONSE FOR VARIOUS R

VCC=+3.3V

=-50V

V

BAT

=500Ω

R

L

3rd HD

VCC= +3.3V
V

= -52V

BAT

=500Ω

R

L

CL=15pF

L

FIGURE 2. FREQUENCY RESPONSE FOR VARIOUS C

(EACH OUTPUTS TO GROUND)

VCC=+3.3V

=-50V

V

BAT

=500Ω

R

L

3rd HD

CL=39pF

CL=22pF

L

2nd HD

FIGURE 3. 1MHz 2nd & 3rd HARMONIC DISTORTION vs

OUTPUT VOLTAGE

VCC=+3.3V

=-50V

V

BAT

=500Ω

R

L

3rd HD

2nd HD

FIGURE 5. 3.75MHz 2nd & 3rd HARMONIC DISTORTION vs

OUTPUT VOLTAGE

2nd HD

FIGURE 4. 2.2MHz 2nd & 3rd HARMONIC DISTORTION vs

OUPUT VOLTAGE

VCC=+3.3V

=-50V

V

BAT

=500Ω

R

L

3.75 MHz

2.2 MHz

1MHz

FIGURE 6. TOTAL HARMONIC DISTORTION FOR VARIOUS

FREQUENCIES

5

FN6113.0

February 21, 2006

Typical Performance Curves (Continued)

ISL1540

VCC=+3.3V

= -52V

V

BAT

AB ==> CD

CD ==> AB

VCC=+3.3V
V

= -25V

BAT

V

CC

FIGURE 7. CROSSTALK vs FREQUENCY FIGURE 8. PSRR vs FREQUENCY

JEDEC JESD51-7 HIGH EFFECTIVE

JEDEC JESD51-3 LOW EFFECTIVE
THERMAL CONDUCTIVITY TEST BOARD

1.2

947mW

1

0.8

0.6

0.4

0.2

POWER DISSIPATION (W)

0

0 255075100 150

AMBIENT TEMPERATURE (°C)

QFN32

θJA=132°C/W

12585

THERMAL CONDUCTIVITY TEST BOARD ­LPP EXPOSED DIEPAD SOLDERED TO
PCB PER JESD51-5

4.5

3.571W

4

3.5

3

2.5

2

1.5

1

POWER DISSIPATION (W)

0.5

0

0 255075100 150

AMBIENT TEMPERATURE (°C)

QFN32

θJA=35°C/W

12585

FIGURE 9. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

6

FIGURE 10. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

FN6113.0

February 21, 2006

Application Information

PCB Layout Considerations for QFN Package

The ISL1540 die is packaged in a thermally efficient 32-pins
QFN leadless plastic package (8mm x 8mm). A thermal pad
is underneath the package and can use PCB surface metal
vias areas and internal ground planes to spread heat away
from the package. The larger the PCB area, the lower the
junction temperature of the device will be. In ADSL
applications, multiple layer circuit boards with internal
ground plane are generally used. 13 mil vias are
recommended to connect the metal area under the device
with internal ground plane.

Power Control Function

The ISL1540 contains four forms of power control operation.
The two inputs, MON1 and MON2, can be used to control
the supply current of the ISL1540 drive amplifiers. ENAB
and ENCD can be used to enable and disable the device.
Below is the table showing the power modes.

TABLE 1. POWER MODES FOR ISL1541

MON1 MON2 ENAB ENCD OPERATION

000 0I
1 1 0 0 1/2-IS Power Mode
X X 1 1 Power Down

Full Power Mode

S

ISL1540

7

FN6113.0

February 21, 2006

Package Outline Drawing

ISL1540

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

FN6113.0

February 21, 2006