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Industry News

Linear's 140 V precision op amp features 3 pA bias current, 3.5 µVP-P noise

January 30, 2013
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Linear Technology announces the LTC6090, a precision operational amplifier that operates on a supply voltage up to 140 V (or ±70 V). Its combination of rail-to-rail output, 3 pA (typical) input bias current, 1.6 mV maximum input offset voltage and 3.5 µVP-P low frequency noise delivers the precision required for high performance ATE, piezo driver, and DAC buffer applications. An enhanced slew rate of 19 V/µs allows the output to swing 140 V in less than 8 µs. Gain bandwidth product is 10 MHz.

The LTC6090 is optimized both for designs with high impedance inputs and those sensitive to leakage currents. In addition to a standard SO-8 package with exposed pad, the LTC6090 is available in a TSSOP package with guard pins. This allows a guard ring to be easily routed around the input to completely enclose it.

Thermal characteristics are a concern for any high voltage space-constrained system. The LTC6090 is designed with these challenges in mind. Supply current is only 3.9mA max. Output current is typically ±10mA. 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. Both TSSOP-16 and SOIC-8 package versions include an exposed pad to minimize thermal resistance.

The LTC6090 is available in three temperature range grades: 0° to 70°C, -40°C to 85°C and -40° to 125°C junction temperature. Prices start at $3.45 each in quantities of 1,000. For more information, visit www.linear.com/product/LTC6090.

Summary of Features: LTC6090

  • Supply Range: ±4.75 V to ±70 V (140 V)
  • 0.1 Hz to 10 Hz Noise: 3.5 µVP-P
  • Input Bias Current: 50 pA Max
  • Low Offset Voltage: 1.6 mV Maximum over Temperature
  • Rail-to-Rail Output Stage
  • Output Sink & Source 10 mA
  • 10 MHz Gain Bandwidth Product
  • 19 V/µs Slew Rate
  • 11 nV/√Hz Noise Density
  • Thermal Shutdown
  • Available in Thermally Enhanced SOIC-8E or TSSOP-16E Packages

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