V

IN

402W

402W

14-Bit

10MSPS

R

S

24.9W

2kW

2kW

2kW

2kW

0.1 F

m

0.1 F

m

IN

IN

(+2V)

REFB

(+1V)

VREF

SEL

REFT

(+3V)

100pF

+5V

-5V

50W

+5V

OPA842

ADS850

OPA842

www.ti.com

SBOS267D – NOVEMBER 2002 – REVISED SEPTEMBER 2010

Wideband, Low Distortion, Unity-Gain Stable, Voltage-Feedback

OPERATIONAL AMPLIFIER

Check for Samples: OPA842

1

FEATURES

DESCRIPTION

2

•

UNITY-GAIN BANDWIDTH: 400MHz

The OPA842 provides a level of speed and dynamic

range previously unattainable in a monolithic op amp.

•

GAIN-BANDWIDTH PRODUCT: 200MHz

Using unity-gain stable, voltage-feedback architecture

•

LOW INPUT VOLTAGE NOISE: 2.6nV/

√Hz

with two internal gain stages, the OPA842 achieves

•

VERY LOW DISTORTION: –93dBc (5MHz)

exceptionally low harmonic distortion over a wide

•

HIGH OPEN-LOOP GAIN: 110dB

frequency

range.

The

classic

differential

input

provides all the familiar benefits of precision op amps,

•

FAST 12-BIT SETTLING: 22ns (0.01%)

such as bias current cancellation and very low

•

LOW DC VOLTAGE OFFSET: 300mV Typical

inverting current noise compared with wideband

•

PROFESSIONAL LEVEL DIFF GAIN/PHASE

current

differential

gain/phase

performance,

low-voltage noise, and high output current drive make

ERROR: 0.003%/0.008°

the OPA842 ideal for most high dynamic range

applications.

APPLICATIONS

•

ADC/DAC BUFFER DRIVER

Unity-gain stability makes the OPA842 particularly

suitable

for

low-gain

differential

amplifiers,

•

LOW DISTORTION IF AMPLIFIER

transimpedance amplifiers, gain of +2 video line

•

ACTIVE FILTER CONFIGURATION

drivers,

wideband

integrators,

and

low-distortion

•

LOW-NOISE DIFFERENTIAL RECEIVER

analog-to-digital converter (ADC) buffers. Where

•

HIGH-RESOLUTION IMAGING

higher gain or even lower harmonic distortion is

•

TEST INSTRUMENTATION

required,

consider

the

OPA843—a

higher-gain

bandwidth and lower-noise version of the OPA842.

•

PROFESSIONAL AUDIO

•

OPA642 UPGRADE

OPA842 RELATED PRODUCTS

INPUT NOISE

GAIN-BANDWIDTH

SINGLES

VOLTAGE (nV/

√Hz)

PRODUCT (MHz)

OPA843

2.0

800

OPA846

1.1

2500

OPA847

0.8

3700

AC-Coupled to 14-Bit ADS850 Interface

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.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.