LMP8350_14 Datasheet, PDF (1/31 Pages) National Semiconductor (TI) – LMP8350 Ultra Low Distortion Fully Differential Precision ADC Driver with Selectable Power Modes

LMP8350
www.ti.com
SNOSB80B – FEBRUARY 2011 – REVISED MARCH 2013
LMP8350 Ultra Low Distortion Fully Differential Precision ADC Driver with Selectable
Power Modes
Check for Samples: LMP8350
FEATURES
1
•234 Differential Input and Output
• Tri-Level Power Settings with Shutdown
• Ultra Low HD2/HD3 and THD+N Distortion
• Adjustable Output Common Mode Level
• Fully Balanced Differential Architecture
• Single or Dual Supply Operation
APPLICATIONS
• High Resolution Differential ADC Driver
• Portable instrumentation
• Precision Line Driver
KEY SPECIFICATIONS
(T_A = 25°C, V_S = +10V, R_L = 2kΩ//20pF, typical
values unless otherwise specified)
• Operating Voltage Range 4.5V to 12V
• Supply Current 3 to 13mA
• Total THD+N @ 1KHz 0.000097%
• HD2 / HD3 Distortion @ 1KHz < –124 dBc
• Bandwidth 118 mHz
• Settling to 0.1% 20 ns
• Low Offset Drift 0.4 µV/°C
• Offset Voltage 80µV
• Voltage Noise 4.6nV/Hz
• Operating temperature range −40°C to +85°C
DESCRIPTION
The LMP8350 is an ultra low distortion fully
differential amplifier designed for driving high-
performance precision analog-to-digital converters
(ADC). As part of the PowerWise™ family, a unique
mode enable pin allows the user to choose from three
different operating modes, trading power
consumption for dynamic performance.
The high power mode is optimized for highest AC
performance. The low noise, wide bandwidth and fast
slew rate makes the LMP8350 ideal for driving 24bit
ADCs with input sampling rates of 10MHz or less.
The medium power mode is optimized for precision
DC performance, and can be used to drive 24-bit
ADCs with input sampling rates of 6MHz or less. The
low power mode is a trade-off between AC
performance and quiescent current for power
sensitive applications. The disable mode fully shuts-
down the amplifier for further standby power savings.
The fully differential architecture of this device allows
for easy implementation of a single-ended to fully-
differential output conversion. Driving a 3Vpp, 1kHz
output sine wave with the amplifier powered by ±3.3V
rails in high power mode yields 0.000098% THD+N.
The LMP8350 is part of the LMP™ precision amplifier
family. It is offered in the 8-Pin SOIC package and
has an operating temperature range of −40°C to
+85°C.
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.
LMP is a trademark of Texas Instruments.
2
PowerWise is a trademark of National Semiconductor Corporation.
3
All other trademarks are the property of their respective owners.
4
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 © 2011–2013, Texas Instruments Incorporated