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High-speed op amps (GBW ≥ 50 MHz)

LMH6629

ACTIVE

Ultra-low-noise high-speed operational amplifier with shutdown

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Data sheet

LMH6629

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) 2.7 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 GBW (typ) (MHz) 4000 BW at Acl (MHz) 900 Acl, min spec gain (V/V) 4 Slew rate (typ) (V/µs) 1100 Vn at flatband (typ) (nV√Hz) 0.69 Vn at 1 kHz (typ) (nV√Hz) 0.69 Iq per channel (typ) (mA) 15.5 Vos (offset voltage at 25°C) (max) (mV) 0.78 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 87 Input bias current (max) (pA) 23000 Offset drift (typ) (µV/°C) 0.45 Iout (typ) (mA) 250 2nd harmonic (dBc) 88 3rd harmonic (dBc) 74 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 GBW (typ) (MHz) 4000 BW at Acl (MHz) 900 Acl, min spec gain (V/V) 4 Slew rate (typ) (V/µs) 1100 Vn at flatband (typ) (nV√Hz) 0.69 Vn at 1 kHz (typ) (nV√Hz) 0.69 Iq per channel (typ) (mA) 15.5 Vos (offset voltage at 25°C) (max) (mV) 0.78 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 87 Input bias current (max) (pA) 23000 Offset drift (typ) (µV/°C) 0.45 Iout (typ) (mA) 250 2nd harmonic (dBc) 88 3rd harmonic (dBc) 74 Frequency of harmonic distortion measurement (MHz) 1
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 WSON (NGQ) 8 9 mm² 3 x 3
  • Specified for VS = 5 V, RL = 100 Ω, AV = 10V/V
    WSON-8 Package, unless Specified. –3dB
    Bandwidth 900 MHz
  • Input Voltage Noise 0.69 nV/√Hz
  • Input Offset Voltage Max. Over Temperature
    ±0.8 mV
  • Slew Rate 1600 V/ µs
  • HD2 @ f = 1 MHz, 2VPP −90 dBc
  • HD3 @ f = 1 MHz, 2VPP −94 dBc
  • Supply Voltage Range 2.7 V to 5.5 V
  • Typical Supply Current 15.5 mA
  • Selectable Min. Gain ≥4 or ≥10 V/V
  • Enable Time: 75 ns
  • Output Current ±250 mA
  • WSON-8 and SOT-23-5 Packages
  • Specified for VS = 5 V, RL = 100 Ω, AV = 10V/V
    WSON-8 Package, unless Specified. –3dB
    Bandwidth 900 MHz
  • Input Voltage Noise 0.69 nV/√Hz
  • Input Offset Voltage Max. Over Temperature
    ±0.8 mV
  • Slew Rate 1600 V/ µs
  • HD2 @ f = 1 MHz, 2VPP −90 dBc
  • HD3 @ f = 1 MHz, 2VPP −94 dBc
  • Supply Voltage Range 2.7 V to 5.5 V
  • Typical Supply Current 15.5 mA
  • Selectable Min. Gain ≥4 or ≥10 V/V
  • Enable Time: 75 ns
  • Output Current ±250 mA
  • WSON-8 and SOT-23-5 Packages

The LMH6629 is a high-speed, ultra-low noise amplifier designed for applications requiring wide bandwidth with high gain and low noise such as in communication, test and measurement, optical and ultrasound systems.

The LMH6629 operates on 2.7-V to 5.5-V supply with an input common mode range that extends below ground and outputs that swing to within 0.8 V of the rails for ease of use in single supply applications. Heavy loads up to ±250 mA can be driven by high-frequency large signals with the LMH6629’s –3dB bandwidth of 900 MHz and 1600 V/µs slew rate. The LMH6629 (WSON-8 package only) has user-selectable internal compensation for minimum gains of 4 or 10 controlled by pulling the COMP pin low or high, thereby avoiding the need for external compensation capacitors required in competitive devices. Compensation for the SOT-23-5 package is internally set for a minimum stable gain of 10 V/V. The WSON-8 package also provides the power-down enable/disable feature.

The low-input noise (0.69 nV/√Hz and 2.6 pA/√Hz), low distortion (HD2/HD3 = −90 dBc/−94 dBc) and ultra-low DC errors (800 µV VOS maximum over temperature, ±0.45 µV/°C drift) allow precision operation in both ac- and dc-coupled applications.

The LMH6629 is fabricated in Texas Instruments’ proprietary SiGe process and is available in a 3 mm × 3 mm 8-pin WSON package as well as the SOT-23-5 package.

The LMH6629 is a high-speed, ultra-low noise amplifier designed for applications requiring wide bandwidth with high gain and low noise such as in communication, test and measurement, optical and ultrasound systems.

The LMH6629 operates on 2.7-V to 5.5-V supply with an input common mode range that extends below ground and outputs that swing to within 0.8 V of the rails for ease of use in single supply applications. Heavy loads up to ±250 mA can be driven by high-frequency large signals with the LMH6629’s –3dB bandwidth of 900 MHz and 1600 V/µs slew rate. The LMH6629 (WSON-8 package only) has user-selectable internal compensation for minimum gains of 4 or 10 controlled by pulling the COMP pin low or high, thereby avoiding the need for external compensation capacitors required in competitive devices. Compensation for the SOT-23-5 package is internally set for a minimum stable gain of 10 V/V. The WSON-8 package also provides the power-down enable/disable feature.

The low-input noise (0.69 nV/√Hz and 2.6 pA/√Hz), low distortion (HD2/HD3 = −90 dBc/−94 dBc) and ultra-low DC errors (800 µV VOS maximum over temperature, ±0.45 µV/°C drift) allow precision operation in both ac- and dc-coupled applications.

The LMH6629 is fabricated in Texas Instruments’ proprietary SiGe process and is available in a 3 mm × 3 mm 8-pin WSON package as well as the SOT-23-5 package.
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Technical documentation

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Type Title Date
* Data sheet LMH6629 Ultra-Low Noise, High-Speed Operational Amplifier with Shutdown datasheet (Rev. I) PDF | HTML 05 Dec 2014
More literature High Speed ADCs and Amplifiers for Flow Cytometry Applications 12 Oct 2020
Technical article 3 common questions when designing with high-speed amplifiers 17 Jul 2020
More literature Transimpedance Amplifiers (TIA): Choosing the Best Amplifier for the job (Rev. A) 16 May 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article What you always wanted to know about TINA-TI but were afraid to ask! (Part 3) 09 Apr 2014
More literature Considerations for High-Gain Multistage Designs 13 May 2013
More literature AN-1604 Decompensated Operational Amplifiers (Rev. B) 01 May 2013
EVM User's guide AN-1897 LMH6629 LLP-8 Amplifier Evaluation Board (Rev. B) 01 May 2013
More literature OA-14 Improving Amplifier Noise for High 3rd Intercept Amplifiers (Rev. F) 01 May 2013
Technical article High-gain, high-bandwidth…why is this circuit oscillating? 01 Feb 2013
Technical article High-gain, high-bandwidth… how can I get it all? 25 Jan 2013
More literature Die D/S LMH6629 MDC Ultra-Low Noise, High-Speed Op Amp With Shutdown 28 Sep 2012

Design & development

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

Evaluation board

LMH6629SDEVAL — LMH6629 evaluation module for ultra-low-noise high-speed operational amplifier with shutdown

The LMH6629 evaluation board is designed to aid in the characterization of Texas Instruments High Speed LMH6629 Low Noise Operational Amplifier. Use the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and characterization.

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

LMH730316 — LMH730316 Evaluation Board for High-Speed Single Op Amp in the 5-/6-Pin SOT-23 Package

Texas Instruments offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amp that are offered in the 5-/6-Pin SOT-23 package. This 4 layer board is designed to improve speed and reduce harmonic distortion by careful placement and routing of components and (...)

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

LMH6629 PSPICE Model

SNOM133.ZIP (3 KB) - PSpice Model
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Simulation model

LMH6629 TINA-TI Reference Design

SNOM340.TSC (34 KB) - TINA-TI Reference Design
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Simulation model

LMH6629 TINA-TI Spice Model

SNOM339.ZIP (8 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 (...)
User guide: PDF
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Reference designs

TIDA-00419 — SONAR Receiver Path Sub-System Reference Design Using an 8 Channel Analog Front End

This reference design is a demonstration of a SONAR receive-path sub-system using the integrated analog front end (AFE) AFE5809. AFE5809 features eight channels of analog signal conditioning  (LNA + VCAT + PGA) and digital processing (ADC + digital demodulator) that brings a high (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00066 — Reference Design for High-Gain Multistage Amplifier

Using the LMH6629 and OPA684 op amps, this reference design deals with the difficulties and limitations of developing very high gain, multistage amplifier circuits. Supported by a full scale application report including theory, simulations, board design and evaluation, this design can be easily (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBV) 5 View options
WSON (NGQ) 8 View options

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