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High-speed op amps (GBW ≥ 50 MHz)

OPA846

ACTIVE

Wideband low-noise voltage-feedback operational amplifier

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Data sheet

OPA846

ACTIVE
Data sheet Order now

Product details

Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 10 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 1750 BW at Acl (MHz) 500 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 625 Vn at flatband (typ) (nV√Hz) 1.2 Vn at 1 kHz (typ) (nV√Hz) 1.2 Iq per channel (typ) (mA) 12.6 Vos (offset voltage at 25°C) (max) (mV) 0.6 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 110 Input bias current (max) (pA) 19000000 Offset drift (typ) (µV/°C) 1.5 Iout (typ) (mA) 80 2nd harmonic (dBc) 76 3rd harmonic (dBc) 109 Frequency of harmonic distortion measurement (MHz) 5
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 10 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 1750 BW at Acl (MHz) 500 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 625 Vn at flatband (typ) (nV√Hz) 1.2 Vn at 1 kHz (typ) (nV√Hz) 1.2 Iq per channel (typ) (mA) 12.6 Vos (offset voltage at 25°C) (max) (mV) 0.6 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 110 Input bias current (max) (pA) 19000000 Offset drift (typ) (µV/°C) 1.5 Iout (typ) (mA) 80 2nd harmonic (dBc) 76 3rd harmonic (dBc) 109 Frequency of harmonic distortion measurement (MHz) 5
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • HIGH BANDWIDTH: 400MHz (G = +10)
  • LOW INPUT VOLTAGE NOISE: 1.2nV/√Hz
  • VERY LOW DISTORTION: –100dBc (5MHz)
  • HIGH SLEW RATE: 625V/µs
  • HIGH DC ACCURACY: VIO ±150µV
  • LOW SUPPLY CURRENT: 12.6mA
  • HIGH GAIN BANDWIDTH PRODUCT: 1750MHz
  • STABLE FOR GAINS ≥ 7
  • APPLICATIONS
    • HIGH DYNAMIC RANGE ADC PREAMPS
    • LOW–NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS
    • WIDEBAND, HIGH GAIN AMPLIFIERS
    • LOW–NOISE DIFFERENTIAL RECEIVERS
    • VDSL LINE RECEIVERS
    • ULTRASOUND CHANNEL AMPLIFIERS
    • SECURITY SENSOR FRONT ENDS
    • UPGRADE FOR THE OPA686, CLC425, AND LMH6624

All trademarks are the property of their respective owners.
  • HIGH BANDWIDTH: 400MHz (G = +10)
  • LOW INPUT VOLTAGE NOISE: 1.2nV/√Hz
  • VERY LOW DISTORTION: –100dBc (5MHz)
  • HIGH SLEW RATE: 625V/µs
  • HIGH DC ACCURACY: VIO ±150µV
  • LOW SUPPLY CURRENT: 12.6mA
  • HIGH GAIN BANDWIDTH PRODUCT: 1750MHz
  • STABLE FOR GAINS ≥ 7
  • APPLICATIONS
    • HIGH DYNAMIC RANGE ADC PREAMPS
    • LOW–NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS
    • WIDEBAND, HIGH GAIN AMPLIFIERS
    • LOW–NOISE DIFFERENTIAL RECEIVERS
    • VDSL LINE RECEIVERS
    • ULTRASOUND CHANNEL AMPLIFIERS
    • SECURITY SENSOR FRONT ENDS
    • UPGRADE FOR THE OPA686, CLC425, AND LMH6624

All trademarks are the property of their respective owners.

The OPA846 combines very high gain bandwidth and large signal performance with very low input voltage noise, while dissipating a low 12.6mA supply current. The classical differential input stage, along with two stages of forward gain and a high power output stage, combine to make the OPA846 an exceptionally low distortion amplifier with excellent DC accuracy and output drive. The voltage-feedback architecture allows all standard op amp applications to be implemented with very high performance.

The combination of low input voltage and current noise, along with a 1.75GHz gain bandwidth product, make the OPA846 an ideal amplifier for wideband transimpedance stages. As a voltage gain stage, the OPA846 is optimized for a flat response at a gain of +10 and is stable down to a gain of +7.

A new external compensation technique can be used to give a very flat frequency response below the minimum stable gain for the OPA846, further improving its already exceptional distortion performance. Using this compensation makes the OPA846 one of the premier 12– to 16–bit Analog–to–Digital (A/D) converter input drivers. The supply current for the OPA846 is precisely trimmed to 12.6mA at +25°C. This, along with carefully defined supply current tempco in the input and output stages, combine to provide exceptional performance over the full specified temperature range.

The OPA846 combines very high gain bandwidth and large signal performance with very low input voltage noise, while dissipating a low 12.6mA supply current. The classical differential input stage, along with two stages of forward gain and a high power output stage, combine to make the OPA846 an exceptionally low distortion amplifier with excellent DC accuracy and output drive. The voltage-feedback architecture allows all standard op amp applications to be implemented with very high performance.

The combination of low input voltage and current noise, along with a 1.75GHz gain bandwidth product, make the OPA846 an ideal amplifier for wideband transimpedance stages. As a voltage gain stage, the OPA846 is optimized for a flat response at a gain of +10 and is stable down to a gain of +7.

A new external compensation technique can be used to give a very flat frequency response below the minimum stable gain for the OPA846, further improving its already exceptional distortion performance. Using this compensation makes the OPA846 one of the premier 12– to 16–bit Analog–to–Digital (A/D) converter input drivers. The supply current for the OPA846 is precisely trimmed to 12.6mA at +25°C. This, along with carefully defined supply current tempco in the input and output stages, combine to provide exceptional performance over the full specified temperature range.
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Technical documentation

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Type Title Date
* Data sheet Wideband, Low Noise, Voltage-Feedback Operational Amplifier datasheet (Rev. E) 30 Dec 2008
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article High-gain, high-bandwidth… how can I get it all? 25 Jan 2013
User guide DEM-OPA-SO-1A User's Guide (Rev. B) 12 Apr 2012
User guide DEM-OPA-SO-1B User's Guide (Rev. D) 12 Apr 2012
User guide DEM-OPA-SOT-1A User's Guide (Rev. B) 12 Apr 2012
User guide DEM-OPA-SO-1B User's Guide (Rev. C) 22 Apr 2011
Application note Transimpedance Considerations for High-Speed Operational Amplifiers 22 Nov 2009
User guide DEM-OPA-SOT-1B User's Guide (Rev. B) 12 Apr 2006
User guide DEM-OPA-SOT-1A User's Guide (Rev. A) 22 Mar 2006
User guide DEM-OPA-SO-1A User's Guide (Rev. A) 16 Mar 2006
Analog Design Journal Using a decompensated op amp for improved performance 11 Mar 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005
Application note ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers 22 Apr 2004
Application note Measuring Board Parasitics in High-Speed Analog Design 07 Jul 2003

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DEM-OPA-SO-1B — Single op-amp evaluation module for SO-8 (non-inverting) package

The DEM-OPA-SO-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.

For more (...)

User guide: PDF
Not available on TI.com
Evaluation board

DEM-OPA-SOT-1B — Single op amp evaluation module for SOT23-5/6 (non-inverting) package

The DEM-OPA-SOT-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the SOT23 (DBV) package.

User guide: PDF
Not available on TI.com
Simulation model

OPA846 PSpice Model (Rev. C)

SBOC005C.ZIP (40 KB) - PSpice Model
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Simulation model

OPA846 TINA-TI Reference Design (Rev. B)

SBOC097B.TSC (98 KB) - TINA-TI Reference Design
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Simulation model

OPA846 TINA-TI Spice Model (Rev. A)

SBOM179A.ZIP (4 KB) - TINA-TI Spice Model
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Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Calculation tool

VOLT-DIVIDER-CALC — Voltage Divider Determines A Set of Resistors for a Voltage Divider

VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.

(...)

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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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SOIC (D) 8 View options
SOT-23 (DBV) 5 View options
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