THS6132 Datasheet, PDF (1/21 Pages) Texas Instruments – HIGH EFFICIENCY CLASS - G ADSL LINE DRIVER

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THS6132
SLLS543A – SEPTEMBER 2002 – REVISED FEBRUARY 2003
HIGH EFFICIENCY CLASS-G ADSL LINE DRIVER
FEATURES
D Low Total Power Consumption Increases
ADSL Line Card Density (20 dBm on Line)
– 600 mW w/Active Termination (Full Bias)
– 530 mW w/Active Termination (Low Bias)
D Low MTPR of –74 dBc (All Bias Conditions)
D High Output Current of 500 mA (typ)
D Wide Supply Voltage Range of ±5 V to ±15 V
[V_CC(H)] and ±3.3 V to ±15 V [V_CC(L)]
D Wide Output Voltage Swing of 43 Vpp Into
100-Ω Differential Load [V_CC(H) = ±12 V]
D Multiple Bias Modes Allow Low Quiescent
Power Consumption for Short Line Lengths
– 160-mW/ch Full Bias Mode
– 135-mW/ch Mid Bias Mode
– 110-mW/ch Low Bias Mode
– 75-mW/ch Terminate Only Mode
– 13-mW/ch Shutdown Mode
D Low Noise for Increased Receiver Sensitivity
– 3.3 pA/√Hz Noninverting Current Noise
– 9.5 pA/√Hz Inverting Current Noise
– 3.5 nV/√Hz Voltage Noise
APPLICATIONS
D Ideal for Active Termination Full Rate ADSL
DMT applications (20-dBm Line Power)
DESCRIPTION
The THS6132 is a Class-G current feedback differential
line driver ideal for full rate ADSL DMT systems. Its
extremely low power consumption of 600 mW or lower is
ideal for ADSL systems that must achieve high densities
in ADSL central office rack applications. The unique patent
pending architecture of the THS6132 allows the quiescent
current to be much lower than existing line drivers while
still achieving very high linearity. In addition, the multiple
bias settings of the amplifiers allow for even lower power
consumption for line lengths where the full performance of
the amplifier is not required. The output voltage swing has
been vastly improved over first generation Glass-G
amplifiers and allows the use of lower power supply
voltages that help conserve power. For maximum
flexibility, the THS6132 can be configured in classical
Class-AB mode requiring only as few as one power supply.
Typical ADSL CO Line Driver Circuit Utilizing Active Impedance Supporting A 6.3 Crest Factor
CODEC
V_IN+
+15V
THS6132a
+6V
+
12.4 Ω
–
1 kΩ
1.33 kΩ
+20 dBm
Line
1:1
Power
576 Ω
1.33 kΩ
100 Ω
1 kΩ
CODEC
V_IN–
–
+
–6V
– 15 V
12.4 Ω
THS6132b
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semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright  2002–2003, Texas Instruments Incorporated