LMP8350_15 Datasheet, PDF (1/36 Pages) Texas Instruments – LMP8350 Ultra-Low Distortion Fully-Differential Precision ADC Driver With Selectable Power Modes

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LMP8350
SNOSB80C – FEBRUARY 2011 – REVISED OCTOBER 2015
LMP8350 Ultra-Low Distortion Fully-Differential Precision ADC Driver With Selectable
Power Modes
1 Features
•1 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
• Operating Voltage Range 4.5 V to 12 V
• Supply Current 3 mA to 13 mA
• Total THD+N at 1 KHz 0.000097%
• HD2 / HD3 Distortion at 1 KHz < –124 dBc
• Bandwidth 118 mHz
• Settling to 0.1% 20 ns
• Low Offset Drift 0.4 µV/°C
• Offset Voltage 80 µV
• Voltage Noise 4.6 nV/Hz
• Operating Temperature Range −40°C to +85°C
2 Applications
• High-Resolution Differential ADC Drivers
• Portable Instrumentation
• Precision Line Drivers
3 Description
The LMP8350 device 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 make the LMP8350 ideal for driving 24-
bit ADCs with input sampling rates of 10 MHz 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 6 MHz 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 3-Vpp, 1-kHz
output sine wave with the amplifier powered by ±3.3-
V rails in high power mode yields 0.000098%
THD+N.
The LMP8350 is part of the LMP™ precision amplifier
family, and is offered in the 8-pin SOIC package, with
an operating temperature range of −40°C to +85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMP8350
SOIC (8)
3.91 mm × 4.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
+V_{REF +V +V}
+V
V_INN
V_INP
R_G1
V_OCM
R_G2
R_F1
-+
LMP8350
+-
R_O1
C_S
R_O2
V_REFP V_A
+ V_INP
V_IO
CS
SCLK
24 Bit A/D
- V_INN
SDI
SDO
Micro-
Controller
V_{REFN AGND DGND}
R_F2
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.