Precision Op Amps Operate on 140V Supply

Linear Technology Corp. 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 degrees 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 degrees 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 x 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 to 70 degrees C, -40 to 85 degrees C and -40 to 125 degrees C junction temperature. The LTC6091 is available in -40 to 85 degrees C and -40 to 125 degrees C junction temperature grades.

Linear Technology Corporation
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