OPA842IDG4 Datasheet, PDF (1/29 Pages) Texas Instruments – Wideband, Low Distortion, Unity-Gain Stable, Voltage-Feedback OPERATIONAL AMPLIFIER

OPA842
www.ti.com
SBOS267D – NOVEMBER 2002 – REVISED SEPTEMBER 2010
Wideband, Low Distortion, Unity-Gain Stable, Voltage-Feedback
OPERATIONAL AMPLIFIER
Check for Samples: OPA842
FEATURES
1
•2 UNITY-GAIN BANDWIDTH: 400MHz
• GAIN-BANDWIDTH PRODUCT: 200MHz
• LOW INPUT VOLTAGE NOISE: 2.6nV/√Hz
• VERY LOW DISTORTION: –93dBc (5MHz)
• HIGH OPEN-LOOP GAIN: 110dB
• FAST 12-BIT SETTLING: 22ns (0.01%)
• LOW DC VOLTAGE OFFSET: 300mV Typical
• PROFESSIONAL LEVEL DIFF GAIN/PHASE
ERROR: 0.003%/0.008°
APPLICATIONS
• ADC/DAC BUFFER DRIVER
• LOW DISTORTION IF AMPLIFIER
• ACTIVE FILTER CONFIGURATION
• LOW-NOISE DIFFERENTIAL RECEIVER
• HIGH-RESOLUTION IMAGING
• TEST INSTRUMENTATION
• PROFESSIONAL AUDIO
• OPA642 UPGRADE
DESCRIPTION
The OPA842 provides a level of speed and dynamic
range previously unattainable in a monolithic op amp.
Using unity-gain stable, voltage-feedback architecture
with two internal gain stages, the OPA842 achieves
exceptionally low harmonic distortion over a wide
frequency range. The classic differential input
provides all the familiar benefits of precision op amps,
such as bias current cancellation and very low
inverting current noise compared with wideband
current differential gain/phase performance,
low-voltage noise, and high output current drive make
the OPA842 ideal for most high dynamic range
applications.
Unity-gain stability makes the OPA842 particularly
suitable for low-gain differential amplifiers,
transimpedance amplifiers, gain of +2 video line
drivers, wideband integrators, and low-distortion
analog-to-digital converter (ADC) buffers. Where
higher gain or even lower harmonic distortion is
required, consider the OPA843—a higher-gain
bandwidth and lower-noise version of the OPA842.
OPA842 RELATED PRODUCTS
SINGLES
INPUT NOISE GAIN-BANDWIDTH
VOLTAGE (nV/√Hz) PRODUCT (MHz)
OPA843
2.0
800
OPA846
1.1
2500
OPA847
0.8
3700
+5V
+5V
R_S
2kW
2kW
V_IN
0.1mF _24.9W
OPA842
50W
100pF
REFT
(+3V)
IN
-5V
402W
2kW
ADS850
14-Bit
10MSPS
402W
IN
0.1mF
2kW
(+2V) (+1V)
REFB VREF ^SEL
AC-Coupled to 14-Bit ADS850 Interface
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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 © 2002–2010, Texas Instruments Incorporated