LTC6269IDD

Instrumentation, Op Amps, Buffer Amps Overview

The LTC6269IDD-10#PBF is a dual-channel ultra-low bias current FET input operational amplifier manufactured by Analog Devices. It features a gain-bandwidth product of 4 GHz and a slew rate of 1.5 kV/us. The device operates on supply voltages between 3.1 V and 5.25 V, consuming 16.5 mA of quiescent current. Key electrical specifications include an input offset voltage of 200 uV, input bias current of 3 fA, and input voltage noise density of 4 nV/sqrt Hz. It is housed in a DFN-10 package and supports shutdown functionality.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low input bias current for high impedance applications
• High-speed performance with 4 GHz gain-bandwidth product
• FET input architecture ensuring minimal loading effects

Instrumentation, Op Amps, Buffer Amps Applications

• High-speed transimpedance amplifiers (TIA)
• Precision photodiode signal conditioning
• Medical imaging systems requiring low noise
• Spectroscopy equipment
• Scientific instrumentation

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix to ensure correct temperature range and packaging configuration. Confirm availability through authorized distributors as stock levels fluctuate. Ensure compliance with RoHS directives for environmental standards before finalizing procurement orders.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when designing circuits that demand both extremely low input bias currents and wide bandwidth. Evaluate the trade-off between the 4 GHz bandwidth and the 4 nV/sqrt Hz voltage noise density against system requirements. Consider the DFN-10 package size for space-constrained PCB layouts.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LTC6269 series, which includes variants like the LTC6269HDD#PBF offering 500 MHz bandwidth. The series is designed for applications requiring femtoampere-level bias currents combined with high-speed signal processing capabilities.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Consider the LTC6268 series for single-channel equivalents or other members of the LTC6269 family if different bandwidth specifications are required. Verify pin compatibility and thermal characteristics when substituting.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the current noise of the LTC6269 behave at higher frequencies?

Unlike bipolar amplifiers, the current noise in FET input amps like the LTC6269 increases with frequency, typically reaching approximately 5.6 fA/sqrt Hz at 100 kHz.

What is the typical input bias current specification for this device?

The LTC6269 features an ultra-low input bias current of 3 fA, making it suitable for high-impedance sensor interfaces.