Datasheet
PWP 20-PinRHF 24-Pin
1
FEATURES DESCRIPTION
APPLICATIONS
+
−
1:1
CODEC
V
IN+
−
+
CODEC
V
IN−
30.1 Ω
1 μF 33nF
Line:
100 Ω
30.1 Ω
4.99kΩ
4.99kΩ
1.15kΩ
0.1 μF
LinePower= ADSL2:19.8dBm
ADSL2+:20.4dBm
ADSL2++:21.1dBm
12V
−12V
THS6184
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................................................................................................................................................. SLLS635D – AUGUST 2005 – REVISED JANUARY 2009
DUAL-PORT, LOW-POWER DIFFERENTIAL
xDSL LINE DRIVER AMPLIFIERS
23
• Trimmed Low-Power Consumption
The THS6184 is a dual-port, low-power current
feedback differential line driver amplifier system ideal
– 4.2-mA/amp Full Bias Mode; 4.8 mA Max
for xDSL systems. Its extremely low-power
– 3.2-mA/amp Mid Bias Mode; 3.7 mA Max
dissipation is ideal for ADSL, ADSL2, ADSL2+, and
– 2.15-mA/amp Low Bias Mode; 2.5 mA Max
ADSL2++ systems that must achieve high densities in
– Shutdown Mode and I
ADJ
Pin for Variable ADSL central office applications by combining two
ports, or four amplifiers, into one package.
Bias
• Low Noise
The unique architecture of the THS6184 allows the
trimmed quiescent current to be much lower than
– 3-nV/ √ Hz Voltage Noise
existing line drivers while still achieving high linearity.
– 5.9-pA/ √ Hz Inverting Current Noise
Distortion at these low-power levels is good with
– 1.2-pA/ √ Hz Noninverting Current Noise
– 83-dBc THD at 1 MHz with the low bias mode of 4.2
mA/port. Fixed and variable multiple-bias settings of
• Low MTPR Distortion
the amplifiers allows for enhanced power savings for
– – 74 dB with ADSL and ADSL2
line lengths where the full performance of the
– – 71 dB with ADSL2+ and – 70 dB with
amplifier is not required.
ADSL2++
The wide output swing of 44-V
PP
differentially with
• – 83 dBc THD (1 MHz, 100- Ω Differential)
± 12-V power supplies coupled with over 415-mA
• High Output Current: >415 mA (25- Ω Load)
current drive allow for wide dynamic range, keeping
distortion minimized. With a low 3-nV/ √ Hz voltage
• Wide Output Swing: 44 V
PP
( ± 12-V, 200- Ω
noise coupled with a low 5.9-pA/ √ Hz inverting current
Differential)
noise, the THS6184 increases the sensitivity of the
• Wide Bandwidth: 30 MHz (Gain = 5)
receive signals allowing for better margins and reach.
• Wide Power Supply Range: ± 4 V to ± 16 V
• Ideal For Power Sensitive, High Density ADSL,
ADSL2, ADSL2+, and ADSL2++ Systems
Figure 1. Typical Line Driver Circuit Using One Port of THS6184
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2 PowerPAD is a trademark of Texas Instruments.
3 All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005 – 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.