Rail-to-Rail Upstream ADSL Line Driver
AD45048
FEATURES
Dual op amp
Voltage feedback
Wide supply range: from 3.3 V to 24 V
Rail-to-rail output
Output swing to within 0.5 V of supply rails @ 230 mA
23 V p-p differential, R
LOAD
of 50 惟 from 12 V supply
High output current
Linear output current of 230 mA peak into 25 惟
鈭?8 dBc MTPR @ 15 dBm (100 惟 telephone line)
Low noise
4.5 nV/鈭欻z voltage noise density @ 100 kHz
1.5 pA/鈭欻z current noise density @ 100 kHz
High speed
65 MHz bandwidth (A
V
= 1, 鈭? dB)
55 V/渭s slew rate (R
LOAD
= 25 惟)
PIN CONFIGURATION
OUT1
1
鈥揑N1
2
+IN1
3
鈥揤
S 4
8
7
6
5
+V
S
鈥揑N2
+IN2
04817-Sp0-001
OUT2
Figure 1. 8-Lead SOIC
10
0
鈥?0
鈥?0
鈥?0
dBm
鈥?8dB
鈥?0
鈥?0
鈥?0
04817-Sp0-002
鈥?0
APPLICATIONS
Consumer xDSL modems
Twisted pair line drivers
ADSL CPE applications
(Drop in replacement for TS613ID and EL1519CS)
Audio applications
鈥?0
鈥?0
CENTER 86.31174378kHz
1kHz/
SPAN 10kHz
Figure 2. AD45048AR Upstream ADSL MTPR (13 dBm, CF = 5.3)
GENERAL DESCRIPTION
The AD45048 ADSL CPE line driver is a dual operational
amplifier capable of driving high output current (230 mA); it
features a rail-to-rail output stage that swings to within 0.5 V
of the supply rails. The AD45048 rail-to-rail output stage
surpasses the output voltage capability of typical emitter-
follower output stages and can deliver up to 23 V p-p
differentially from a single 12 V supply in ADSL CPE line
driving applications. The low distortion, high output current
and wide output dynamic range make the AD45048 ideal for
driving upstream signals in ADSL CPE applications.
Fabricated with ADI鈥檚 high speed XFCB-HV (eXtra Fast
Complementary Bipolar-High Voltage) process, the high
bandwidth and fast slew rate of the AD45048 keep distortion to
a minimum while dissipating minimum power. The AD45048 is
available in a standard 8-lead SOIC package that can operate
from 鈭?0擄C to +85擄C.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
漏 2005 Analog Devices, Inc. All rights reserved.
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