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Op amp touts 3pA bias current, 1.6mV offset voltage

Posted: 01 Feb 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Linear Technology? operational amplifier? LTC6090? TSSOP-16? SOIC-8?

Linear Technology has introduced a precision operational amplifier that operates on a supply voltage up to 140V (or 70V). The LTC6090 boasts a combination of rail-to-rail output, 3pA (typical) input bias current, 1.6mV maximum input offset voltage and 3.5?VP-P low frequency noise to offer the precision required for high performance ATE, piezo driver, and DAC buffer applications. The company added that an enhanced slew rate of 19V/?s allows the output to swing 140V in less than 8?s.

Touting gain bandwidth product of 10MHz, the LTC6090 is optimised 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, indicated Linear Tech.

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 145C. 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 minimise thermal resistance.

The LTC6090 is available in three temperature range grades: 0C to 70C, -40C to 85C and -40C to 125C junction temperature. Prices start at $3.45 each in quantities of 1,000.

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