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Precision Op Amps Operate on 140V Supply

Aug 4 2014 - MILPITAS, CA
  • Linear Technology announces the LTC6091 and LTC6090-5, additions to the LTC6090 family of precision operational amplifiers which operate on a supply voltage up to 140V (±70V). The dual LTC6091 features separate output disable pins, making it useful in high voltage multiplexed applications. The decompensated single LTC6090-5 amplifier offers higher speed and is stable at a gain of 5 or above.


    The LTC6090, LTC6090-5, and LTC6091 combine wide supply range, high precision, and low noise. Input offset voltage is 1.25mV max over temperature, and low frequency (1/f) noise is 3.5µVP-P from 0.1Hz to 10Hz. The CMOS input structure keeps the input bias current to 50pA maximum at 85°C, making the LTC6090 family suitable for sensor circuits and other applications requiring high input impedance.


    The decompensated LTC6090-5 offers 24MHz gain-bandwidth product and 37V/µs slew rate, compared with 12MHz and 21V/µs for the gain-of-1 stable LTC6090 and LTC6091.


    Supply current is 3.9mA per amplifier max. Output short-circuit current is typically ±90mA. A thermal flag pin (TFLAG) signals when the device junction temperature exceeds 145°C. This pin can be connected to the Output Disable pin for active thermal management.


    The LTC6090 and LTC6090-1 are available in 8-pin SOIC and 16-pin TSSOP packages. The LTC6091 is offered in a 16-pin 4mm × 6mm QFN package. Each of these packages includes an exposed pad to minimize thermal resistance. Prices start at $3.45 each for the LTC6090 and LTC6090-5, and $6.61 each for the LTC6091 in quantities of 1,000.


    The LTC6090 is available in three temperature range grades: 0°C to 70°C, –40°C to 85°C and –40°C to 125°C junction temperature. The LTC6091 is available in –40°C to 85°C and –40°C to 125°C junction temperature grades. For more information, visit www.linear.com/product/LTC6091 and www.linear.com/product/LTC6090.


    Summary of Features: LTC6091


    • Supply Range: ±4.75V to ±70V (140V)
    • 0.1Hz to 10Hz Noise: 3.5µVP-P
    • Input Bias Current: 50pA Maximum
    • Low Offset Voltage: 1.25mV Maximum
    • Low Offset Drift: ±5µV/°C Maximum
    • CMRR: 130dB Minimum
    • Rail-to-Rail Output Stage
    • Output Sink & Source: 20mA Minimum
    • 12MHz Gain Bandwidth Product
    • 21V/µs Slew Rate
    • 11nV/√Hz Noise Density
    • Thermal Shutdown
    • 4mm × 6mm 16-Lead QFN Package

    Summary of Features: LTC6090-5


    • Supply Range: ±4.75V to ±70V (140V)
    • 0.1Hz to 10Hz Noise: 3.5µVP-P
    • Input Bias Current: 50pA Maximum
    • Low Offset Voltage: 1.25mV Maximum
    • Low Offset Drift: ±5µV/°C Maximum
    • CMRR: 130dB Minimum
    • Rail-to-Rail Output Stage
    • Output Sink & Source: 50mA Minimum
    • 24MHz Gain Bandwidth Product
    • 37V/µs Slew Rate
    • 11nV/√Hz Noise Density
    • Thermal Shutdown
    • Available in Thermally Enhanced SOIC-8E or TSSOP-16E Packages

    140V Op Amp Family

    LTC6090-5-6091 PR Image
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