LT6105IDCB#TRMPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT6105IDCB#TRMPBF is a micropower, precision current sense amplifier featuring an extended input common mode range from –0.3V to 44V relative to the negative supply. It monitors unidirectional current via an external sense resistor with a maximum gain error of 1% and an input offset voltage of 0.75mV maximum. The device operates on an independent power supply ranging from 2.85V to 36V while drawing only 250µA typical supply current. It provides a minimum full-scale output current of 1mA and maintains high common-mode rejection ratio exceeding 95dB.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Supports high-side or low-side current sensing with inputs extending over-the-top of the supply rail
• Gain is configurable using external resistors within a range of 1V/V to 100V/V
• Maintains high accuracy through input common-mode rejection and power supply rejection ratios exceeding 95dB
• Sense pins are biased off when the power supply is down, preventing circuit loading

Instrumentation, Op Amps, Buffer Amps Applications

• Current monitoring on positive or negative supply voltages
• Battery monitoring from full charge to depletion
• Fuse or MOSFET switch monitoring
• Automotive systems
• Power management circuits

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific temperature grade suffix 'I' corresponds to the required operating range of –40°C to 85°C. Confirm the DCB package designation matches the 6-lead DFN footprint requirements for the target PCB layout. Ensure the #TRMPBF suffix indicates the correct tape and reel quantity for manufacturing integration.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when applications require precise current measurement across a wide common-mode voltage range without level-shifting complexity. The independent supply pin allows operation in environments where the sensed voltage exceeds the available logic supply. Consider the 1mA output drive capability when determining the appropriate load resistance for downstream analog-to-digital conversion stages.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT6105 family of precision current sense amplifiers manufactured by Analog Devices Inc. It shares architectural similarities with the LT6106 but offers distinct electrical characteristics tailored for specific high-voltage sensing applications. The IDCB variant specifically denotes the industrial temperature grade housed in a compact plastic DFN package.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT6105CDCB#TRMPBF

Instrumentation, Op Amps, Buffer Amps FAQ

How does the LT6105 handle differential voltages between its sense inputs?

The inputs can withstand differential voltages up to ±44V, making it suitable for monitoring fuses or MOSFET switches that may experience large transient differences.

What determines the voltage gain of the amplifier?

The gain is set by external resistors RIN1, RIN2, and ROUT. For best accuracy, RIN1 should equal RIN2, and the gain is calculated as ROUT divided by RIN.