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High-speed op amps (GBW ≥ 50 MHz)

LMH6644

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Low Power, 130MHz, 75mA Rail-to-Rail Output Amplifiers

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Data sheet

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OPA4863 ACTIVE Quad, low-power, 110-MHz RRIO voltage-feedback amplifier Lower noise (5.9 nV/√Hz), lower offset (1.5 mV), lower offset drift (3.5 µV/C) and lower power consumption( 0.7 mA)

LMH6644

ACTIVE
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Product details

Architecture Voltage FB Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12.8 GBW (typ) (MHz) 57 BW at Acl (MHz) 130 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 135 Vn at flatband (typ) (nV√Hz) 17 Vn at 1 kHz (typ) (nV√Hz) 17 Iq per channel (typ) (mA) 2.7 Vos (offset voltage at 25°C) (max) (mV) 5 Rail-to-rail In to V-, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 95 Input bias current (max) (pA) 2600000 Offset drift (typ) (µV/°C) 5 Iout (typ) (mA) 115 2nd harmonic (dBc) 80 3rd harmonic (dBc) 65 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12.8 GBW (typ) (MHz) 57 BW at Acl (MHz) 130 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 135 Vn at flatband (typ) (nV√Hz) 17 Vn at 1 kHz (typ) (nV√Hz) 17 Iq per channel (typ) (mA) 2.7 Vos (offset voltage at 25°C) (max) (mV) 5 Rail-to-rail In to V-, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 95 Input bias current (max) (pA) 2600000 Offset drift (typ) (µV/°C) 5 Iout (typ) (mA) 115 2nd harmonic (dBc) 80 3rd harmonic (dBc) 65 Frequency of harmonic distortion measurement (MHz) 1
SOIC (D) 14 51.9 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4

    (VS = ±5 V, TA = 25°C,
    RL = 2 kΩ, AV = +1. Typical Values Unless
    Specified).

  • −3 dB BW (AV = +1) 130 MHz
  • Supply Voltage Range 2.7 V to 12.8 V
  • Slew Rate, (AV = −1) 130V/µs(1)
  • Supply Current (no load) 2.7 mA/amp 
  • Output Short Circuit Current +115 mA to 145 mA
  • Linear Output Current ±75 mA
  • Input Common Mode Volt. 0.5 V Beyond V−,
    1 V from V+
  • Output Voltage Swing 40 mV from Rails 
  • Input Voltage Noise (100 kHz) 17nV/√Hz
  • Input Current Noise (100 kHz) 0.9pA/√Hz
  • THD (5 MHz, RL = 2 kΩ, VO = 2 VPP,
    AV = +2) −62 dBc
  • Settling Time 68 ns
  • Fully Characterized for 3 V, 5 V, and ±5 V
  • Overdrive Recovery 100 ns
  • Output Short Circuit Protected(2)
  • No Output Phase Reversal with CMVR Exceeded

    (VS = ±5 V, TA = 25°C,
    RL = 2 kΩ, AV = +1. Typical Values Unless
    Specified).

  • −3 dB BW (AV = +1) 130 MHz
  • Supply Voltage Range 2.7 V to 12.8 V
  • Slew Rate, (AV = −1) 130V/µs(1)
  • Supply Current (no load) 2.7 mA/amp 
  • Output Short Circuit Current +115 mA to 145 mA
  • Linear Output Current ±75 mA
  • Input Common Mode Volt. 0.5 V Beyond V−,
    1 V from V+
  • Output Voltage Swing 40 mV from Rails 
  • Input Voltage Noise (100 kHz) 17nV/√Hz
  • Input Current Noise (100 kHz) 0.9pA/√Hz
  • THD (5 MHz, RL = 2 kΩ, VO = 2 VPP,
    AV = +2) −62 dBc
  • Settling Time 68 ns
  • Fully Characterized for 3 V, 5 V, and ±5 V
  • Overdrive Recovery 100 ns
  • Output Short Circuit Protected(2)
  • No Output Phase Reversal with CMVR Exceeded

The LMH664X family true single supply voltage feedback amplifiers offer high speed (130 MHz), low distortion (−62 dBc), and exceptionally high output current (approximately 75 mA) at low cost and with reduced power consumption when compared against existing devices with similar performance.

Input common mode voltage range extends to 0.5V below V− and 1 V from V+. Output voltage range extends to within 40 mV of either supply rail, allowing wide dynamic range especially desirable in low voltage applications. The output stage is capable of approximately 75 mA in order to drive heavy loads. Fast output Slew Rate (130 V/µs) ensures large peak-to-peak output swings can be maintained even at higher speeds, resulting in exceptional full power bandwidth of 40 MHz with a 3 V supply. These characteristics, along with low cost, are ideal features for a multitude of industrial and commercial applications.

Careful attention has been paid to ensure device stability under all operating voltages and modes. The result is a very well behaved frequency response characteristic (0.1dB gain flatness up the 12 MHz under 150 Ω load and AV = +2) with minimal peaking (typically 2dB maximum) for any gain setting and under both heavy and light loads. This along with fast settling time (68ns) and low distortion allows the device to operate well in ADC buffer, and high frequency filter applications as well as other applications.

This device family offers professional quality video performance with low DG (0.01%) and DP (0.01°) characteristics. Differential Gain and Differential Phase characteristics are also well maintained under heavy loads (150 Ω) and throughout the output voltage range. The LMH664X family is offered in single (LMH6642), dual (LMH6643), and quad (LMH6644) options.

The LMH664X family true single supply voltage feedback amplifiers offer high speed (130 MHz), low distortion (−62 dBc), and exceptionally high output current (approximately 75 mA) at low cost and with reduced power consumption when compared against existing devices with similar performance.

Input common mode voltage range extends to 0.5V below V− and 1 V from V+. Output voltage range extends to within 40 mV of either supply rail, allowing wide dynamic range especially desirable in low voltage applications. The output stage is capable of approximately 75 mA in order to drive heavy loads. Fast output Slew Rate (130 V/µs) ensures large peak-to-peak output swings can be maintained even at higher speeds, resulting in exceptional full power bandwidth of 40 MHz with a 3 V supply. These characteristics, along with low cost, are ideal features for a multitude of industrial and commercial applications.

Careful attention has been paid to ensure device stability under all operating voltages and modes. The result is a very well behaved frequency response characteristic (0.1dB gain flatness up the 12 MHz under 150 Ω load and AV = +2) with minimal peaking (typically 2dB maximum) for any gain setting and under both heavy and light loads. This along with fast settling time (68ns) and low distortion allows the device to operate well in ADC buffer, and high frequency filter applications as well as other applications.

This device family offers professional quality video performance with low DG (0.01%) and DP (0.01°) characteristics. Differential Gain and Differential Phase characteristics are also well maintained under heavy loads (150 Ω) and throughout the output voltage range. The LMH664X family is offered in single (LMH6642), dual (LMH6643), and quad (LMH6644) options.
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Technical documentation

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Type Title Date
* Data sheet LMH664x Low Power, 130 MHz, 75 mA Rail-to-Rail Output Amplifiers datasheet (Rev. Q) PDF | HTML 20 Sep 2014
Circuit design Circuit for driving high-voltage SAR ADC with a buffered instrumentation (Rev. A) PDF | HTML 20 Sep 2024
Circuit design Driving a low-voltage single-ended SAR ADC circuit with high-voltage input (Rev. A) PDF | HTML 19 Sep 2024
Circuit design Inverting circuit for high-to-low voltage level translation to drive ADC (Rev. A) PDF | HTML 19 Sep 2024
Application note Reference-Buffer, ADC-Driver, and Transimpedance Applications for OPAx328 PDF | HTML 19 Nov 2022
Design guide High-Speed, High-Side Current Sense Reference Design 19 Jul 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note ADC Input Protection 04 Sep 2013
Application note AN-1240 Video Transmission Over Twisted Pair Wire (Rev. C) 01 May 2013
Application note AN-1244 Photo-Diode Current-to-Voltage Converters (Rev. B) 01 May 2013
More literature Die D/S LMH6644-MDC MWC Low Power, 130MHZ, 75MA Rail-to-Rail Output Amp 10 Jan 2012
Application note A Walk Along the Signal Path (High-Speed Signal Path) 30 Mar 2005

Design & development

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Evaluation board

LMH730131 — Evaluation Board for High-Speed Triple Quad Op Amp in the 14-Pin TSSOP 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 14-Pin TSSOP package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit configuration. (...)

User guide: PDF
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Evaluation board

LMH730231 — Evaluation Board for High-Speed Quad Op Amp in the 14-Pin SOIC 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 14-Pin SOIC package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit configuration. (...)

User guide: PDF
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Simulation model

LMH6644 PSPICE Model

SNOM137.ZIP (1 KB) - PSpice 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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VOLT-DIVIDER-CALC — Voltage divider calculation tool

The voltage divider calculation tool (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. VOLT-DIVIDER-CALC can also be used to (...)
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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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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) 14 Ultra Librarian
TSSOP (PW) 14 Ultra Librarian
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