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+ VINP

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VA

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VREFN

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SCLK

SDI

SDO

+V

+

-

24 Bit A/D

+VREF

AGND

LMP8350

VINN

VINP

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RF2

RG1

RG2

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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

3 Description

The LMP8350 device is an ultra low distortion fully-

1

•

Differential Input and Output

differential

amplifier

designed

for

driving

high-

•

Tri-Level Power Settings with Shutdown

performance precision analog-to-digital converters

•

Ultra Low HD2/HD3 and THD+N Distortion

(ADC). As part of the PowerWise™ family, a unique

mode enable pin allows the user to choose from three

•

Adjustable Output Common-Mode Level

different

operating

modes,

trading

power

•

Fully-Balanced Differential Architecture

consumption for dynamic performance.

•

Single- or Dual-Supply Operation

The high power mode is optimized for highest AC

•

Operating Voltage Range 4.5 V to 12 V

performance. The low noise, wide bandwidth, and

•

Supply Current 3 mA to 13 mA

fast slew rate make the LMP8350 ideal for driving 24-

bit ADCs with input sampling rates of 10 MHz or less.

•

Total THD+N at 1 KHz 0.000097%

The medium power mode is optimized for precision

•

HD2 / HD3 Distortion at 1 KHz < –124 dBc

DC performance, and can be used to drive 24-bit

•

Bandwidth 118 mHz

ADCs with input sampling rates of 6 MHz or less. The

•

Settling to 0.1% 20 ns

low

power

mode

is

a

trade-off

between

AC

performance

and

quiescent

current

for

power-

•

Low Offset Drift 0.4 µV/°C

sensitive applications. The disable mode fully shuts

•

Offset Voltage 80 µV

down the amplifier for further standby power savings.

•

Voltage Noise 4.6 nV/Hz

The fully differential architecture of this device allows

•

Operating Temperature Range

−40°C to +85°C

for easy implementation of a single-ended to fully-

differential output conversion. Driving a 3-Vpp, 1-kHz

2 Applications

output sine wave with the amplifier powered by ±3.3-

V rails in high power mode yields 0.000098%

•

High-Resolution Differential ADC Drivers

THD+N.

•

Portable Instrumentation

The LMP8350 is part of the LMP™ precision amplifier

•

Precision Line Drivers

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

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.