The DRV1101 is fixed gain differential line driver
designed for very low distortion operation when driv-
ing DSL line transformers. It is designed for use as the
upstream line driver for ADSL G.Lite, and as both
upstream and downstream line drivers in CAP sys-
tems. Operating on a single 5V supply, the DRV1101
can supply up to 230mA peak output current. The
output voltage can swing up to 9.5Vp-p on a single 5V
supply. In ADSL G.Lite applications, DRV1101 can
supply up to 10dBm average
line
power with a crest
factor of 5.3 for a peak line power delivered of
approximately 25dBm. It is packaged in a 8-lead
SOIC.
APPLICATIONS
q
DSL TWISTED PAIR LINE DRIVER
q
COMMUNICATIONS LINE DRIVER
q
TWISTED-PAIR CABLE DRIVER
+5V
DRV1101
Out+
In+
G = 3V/V
In–
Patent
Pending
GND
Out–
4Ω
Protection
1:3.3
Transformer
100Ω
4Ω
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
NOTES: (1) Measurement Bandwidth = 500kHz. (2) Time from 50% point of input step to 50% point of output step. (3) For step input. (4) Output common-mode voltage
follows input common-mode voltage; therefore, if input V
CM
= V
DD
/2, then output V
CM
= V
DD
/2. (5) THD = 1%.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
®
DRV1101
2
PIN CONFIGURATIONS
Top View
ABSOLUTE MAXIMUM RATINGS
Analog Inputs: Current ..............................................
±100mA,
Momentary
±10mA,
Continuous
Voltage ....................................... GND –0.3V to V
DD
+0.2V
Analog Outputs Short Circuit to Ground (+25°C) ..................... Momentary
Analog Outputs Short Circuit to V
DD
(+25°C) ........................... Momentary
V
DD
to GND .............................................................................. –0.3V to 6V
Junction Temperature ................................................................... +150°C
Storage Temperature Range .......................................... –40°C to +125°C
Lead Temperature (soldering, 3s) ................................................. +260°C
Power Dissipation .............................. (See Thermal/Analysis Discussion)
GND
In+
In–
GND
1
2
3
4
8
7
6
5
Out–
V
DD
(+5V)
V
DD
(+5V)
Out+
PACKAGE /ORDERING INFORMATION
+5V
6
In+
2
7
5
Out+
PRODUCT
DRV1101U
PACKAGE
SO-8 Surface Mount
PACKAGE DRAWING
NUMBER
(1)
182
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
In–
3
8
Out–
4
1
GND
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
®
3
DRV1101
APPLICATIONS INFORMATION
INTERNAL BLOCK DIAGRAM
The DRV1101 is a true differential input to differential
output fixed gain amplifier. Operating on a single +5V
power supply, it provides an internally fixed differential
gain of +3V/V and a common-mode gain of +1V/V from the
input to output. Fabricated on an advanced CMOS process,
it offers very high input impedance along with a low imped-
ance 230mA output drive. Figure 1 shows a simplified
internal block diagram.
Out+
V
DD
/2
V
P
Out–
V
DD
/2
V
P
Load
V
P
0V
V
P
Out+
In+
Buffer
Preamp
FIGURE 2. DRV1101 Single Ended and Differential Output
Waveforms.
Out–
In–
example, the specifications show that on +5V supply the
DRV1101 will deliver 6.0Vp-p into 15Ω. The peak load
power under this condition is (6.0Vp-p/2)
2
/15Ω = 600mW.
POWER SUPPLY
The DRV1101 is designed for operation on a single +5V
supply. For loads > 200Ω, each output will swing rail to rail.
This gives a peak-to-peak differential output swing that is
approximately = 2 • V
DD
. For best distortion performance,
the power supply should be decoupled to a good ground
plane immediately adjacent to the package with a 0.1µF
capacitor. In addition, a larger electrolytic supply decoupling
capacitor (6.8µF) should be near the package but can be
shared among multiple devices.
DIGITAL SUBSCRIBER LINE APPLICATIONS
The DRV1101 is designed for the high power, low distor-
tion, requirements of a twisted pair driver in digital commu-
nications applications. These include ADSL (Asymmetrical
Digital Subscriber Lines), and RADSL (Rate adaptive ADSL).
Figure 3 shows a typical transformer coupled xDSL line
driver configuration.
The DRV1101 is recommended as the upstream driver (CPE
equipment) for ADSL G.Lite systems. These system require
an rms line power of 10dBm with a voltage crest factor of
5.3 (crest factor is the ratio of peak to rms voltage). A
voltage crest factor of 5.3 is equivalent to a power crest
factor of about 15dB. Therefore, the peak power required at
the line for G.Lite is 25dBm. Using the basic circuit shown
in Figure 3, DRV1101 will provide this power to the line
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