THS6214 Datasheet, PDF (1/41 Pages) Texas Instruments – Dual-Port, Differential, VDSL2 Line Driver Amplifiers

THS6214
THS6214
THS6214
www.ti.com ....................................................................................................................................................................................................... SBOS431 – MAY 2009
Dual-Port, Differential, VDSL2 Line Driver Amplifiers
FEATURES
1
•23 Low Power Consumption:
– 21mA/Port (Full Bias Mode)
– 16.2mA/Port (Mid Bias Mode)
– 11.2mA/Port (Low Bias Mode)
– Low-Power Shutdown Mode
– I_ADJ Pin for Variable Bias
• Low Noise:
– 2.7nV/√Hz Voltage Noise
– 17pA/√Hz Inverting Current Noise
– 1.2pA/√Hz Noninverting Current Noise
• Low MTPR Distortion:
– 70dB with +20.5dBm G.993.2—Profile 8b
• –93dBc HD3 (1MHz, 100Ω Differential)
• High Output Current: > 416mA (25Ω Load)
• Wide Output Swing: 43.2V_PP (±12V, 100Ω
Differential Load)
• Wide Bandwidth: 150MHz (G_DIFF = 10V/V)
• PSRR: 50dB at 1MHz for Good Isolation
• Wide Power-Supply Range: 10V to 28V
APPLICATIONS
• Ideal For VDSL2 Systems
• Backwards-Compatible with
ADSL/ADSL2+/ADSL2++ Systems
+12V
DESCRIPTION
The THS6214 is a dual-port, current-feedback
architecture, differential line driver amplifier system
ideal for xDSL systems. The device is targeted for
use in VDSL2 (very-high-bit-rate digital subscriber
line 2) line driver systems that enable greater than
+14.5dBm line power, supporting the G.993.2 VDSL2
17a profile. It is also fast enough to support
central-office transmissions of +14.5dBm line power
up to 30MHz.
The unique architecture of the THS6214 uses
minimal quiescent current while still achieving very
high linearity. Differential distortion, under full bias
conditions, is –93dBc at 1MHz and reduces to only
–73dBc at 10MHz. Fixed multiple bias settings of the
amplifiers allow for enhanced power savings for line
lengths where the full performance of the amplifier is
not required. To allow for even more flexibility and
power savings, an adjustable current pin (I_ADJ) is
available to further lower the bias currents.
The wide output swing of 43.2V_PP (100Ω differential
load) with ±12V power supplies, coupled with over
416mA current drive (25Ω load), allows for wide
dynamic headroom, keeping distortion minimal.
The THS6214 is available in a QFN-24 or a
TSSOP-24 PowerPAD™ package.
R_S
R_T
R_F
R_P
R_G
R_P
R_F
R_S
100W
R_T
I_ADJ
+12V
Figure 1. Typical VDSL2 Line Driver Circuit Using One Port of the THS6214
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments, Inc.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated