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Dual-channel generators operate from 3V to 20V

Posted: 17 Sep 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Linear Technology? instrumentation amplifier? Schottky diode? resistor?

Linear Technology Corp. has uncloaked a dual-channel IC offering two very low noise, low ripple bias supplies from a single input. Each channel from the LT3095 incorporates a monolithic step-up DC/DC converter post-regulated by an integrated ultralow noise and high power supply rejection ratio (PSRR) linear regulator.

The LT3095 delivers up to 50mA of continuous output current at output voltages up to 20V with total ripple and noise The LT3095's fixed-frequency, peak current-mode step-up DC/DC converters include an integrated 950mA power switch, Schottky diode and internal frequency compensation. Switching frequency is programmable between 450kHz and 2MHz via a single resistor or synchronisable to an external clock, enabling the use of tiny external components. The LT3095 offers a simple, compact solution footprint with good efficiency for instrumentation amplifiers, RF and data conversion systems, and other low noise biasing applications, noted the company.


The LT3095's linear regulators employ Linear's proprietary current-source reference architecture, providing numerous benefits such as single-resistor output voltage setting capability and bandwidth, noise, PSRR and load regulation performance virtually independent of output voltage. Integrated output noise (in a 10Hz to 100kHz bandwidth) is a mere 4VRMS and PSRR exceeds 70dB over the entire switching frequency range, resulting in total noise and ripple The LT3095's symmetric pinout simplifies PCB design. The device is housed in a thermally enhanced, 3mm x 5mm QFN-24 package, in both industrial E- & I-grade with -40C to 125C temperature range, and military MP-grade versions operating from -55C to 125C. The E grade is priced at $2.95 in 1,000 piece quantities and all versions are available from stock.

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