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LT6105IDCB#TRMPBF

IC CURRENT SENSE 1 CIRCUIT 6DFN

Part Number: LT6105IDCB#TRMPBF

Manufacturer: Analog Devices Inc.

Category: Instrumentation, Op Amps, Buffer Amps

Package: 6-WFDFN Exposed Pad

Datasheet:: LT6105IDCB#TRMPBF.pdf

Description: IC CURRENT SENSE 1 CIRCUIT 6DFN

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LT6105IDCB#TRMPBF Precision Wide Common Mode Current Sense Amplifier

A comprehensive technical overview of the LT6105IDCB#TRMPBF, a micropower, high‑accuracy current sense amplifier from Analog Devices in a compact 6‑lead DFN package. Covers device function, core features, electrical specifications, pin configuration, typical applications, and replacement selection guidance.

Analog Devices / Linear Technology 6‑Lead DFN (2mm x 3mm) 2.85V to 36V

Device Classification Precision Current Sense Amplifier

Part Number: LT6105IDCB#TRMPBF

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +85°C

PRODUCT OVERVIEW

What Is the LT6105IDCB#TRMPBF?

LT6105IDCB#TRMPBF is a micropower, precision current sense amplifier from Analog Devices (formerly Linear Technology) in a compact 6‑lead DFN package. It monitors unidirectional current by measuring the voltage drop across an external sense resistor, and is suitable for both high‑side and low‑side sensing in a wide range of applications.[reference:0]

The device features a very wide input common mode range that extends 44V above V– (independent of V+) and –0.3V below V–.[reference:1] This allows the LT6105IDCB#TRMPBF to continuously monitor current in positive supply rails, negative rails, and even batteries from full charge to depletion without compromising accuracy.[reference:2]

Gain is configurable with external resistors, ranging from 1V/V to 100V/V.[reference:3] With CMRR of 120dB, PSRR exceeding 100dB and input offset voltage below 300µV, the LT6105IDCB#TRMPBF ensures high‑precision current measurement for demanding industrial, automotive, and portable systems.[reference:4]

Ultra‑Wide Common Mode –0.3V to 44V above V–, independent of V+, supports high‑side and low‑side sensing.

High Accuracy 300µV max input offset voltage, 1% max gain error.

Compact Package Tiny 2mm × 3mm 6‑lead DFN package for space‑constrained designs.

DEVICE HIGHLIGHTS

Key Features and Benefits of LT6105IDCB#TRMPBF

Over-the-Top® Wide Common Mode

Common mode range extends 44V above V– (independent of V+) and –0.3V below V–, enabling high‑side, low‑side, and negative rail current sensing without extra level shifters.[reference:5]

High Precision & Low Offset

300µV max input offset voltage and 1% max gain error ensure accurate amplification of small differential signals, reducing measurement uncertainty.[reference:6][reference:7]

Configurable Gain

Gain can be set from 1V/V to 100V/V using two external resistors, providing flexibility for various sense resistor values and full‑scale output requirements.[reference:8]

Wide Supply Voltage Range

Operates from 2.85V to 36V single supply, compatible with 3V, 5V, 12V, and 24V systems, making it versatile for diverse power rails.[reference:9]

Ultra‑Low Power Consumption

Quiescent current is only 150µA; sense input current drops to 1nA when powered down, ideal for battery‑powered and energy‑efficient designs.[reference:10][reference:11]

Tiny DFN Package

Available in a space‑saving 2mm × 3mm 6‑lead DFN package, ideal for portable and compact electronic systems.[reference:12][reference:13]

REFERENCE DATA

Technical Specifications for LT6105IDCB#TRMPBF

Part Number	LT6105IDCB#TRMPBF	Manufacturer	Analog Devices Inc. (Linear Technology)
Device Type	Precision Current Sense Amplifier	Supply Voltage	2.85V to 36V
Input Common Mode Range	–0.3V to 44V (relative to V–)	Gain Configuration	External resistors (1V/V to 100V/V)
Input Offset Voltage	300µV Maximum	Gain Error	1% Max
-3dB Bandwidth	100kHz	Slew Rate	2V/µs
CMRR	120dB	PSRR	>100dB
Supply Current	150µA (Typical)	Sense Input Current (Powered Down)	1nA
Full‑Scale Output Current	1mA Minimum	Differential Input Withstand Voltage	±44V
Package	6‑Lead DFN (2mm × 3mm)	Mounting Type	Surface Mount
Operating Temperature	-40°C to +85°C	Moisture Sensitivity Level	MSL 1

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Gain Setting and Circuit Considerations for LT6105IDCB#TRMPBF

Gain Setting

The LT6105IDCB#TRMPBF gain is set by external resistors R_IN and R_OUT. The gain equation is:

A_V = R_OUT / R_IN

Select R_IN and R_OUT to achieve gains from 1V/V to 100V/V.[reference:14]
Example: R_IN = 100Ω, R_OUT = 4.99kΩ gives a gain of ~50V/V.[reference:15]
Use precision resistors to maintain gain accuracy.

PCB and Power‑Supply Guidance

Current sense amplifier performance depends on layout, bypassing, input routing, and placement of external components.

Place a supply bypass capacitor close to the V+ and V– pins.
Place the sense resistor (R_SENSE) close to the +IN and –IN pins, using Kelvin connections to minimize parasitic resistance.
Keep input traces short and away from noisy digital signals.
The exposed pad on the bottom of the DFN package is connected to V– and should be soldered to the PCB for proper thermal and electrical performance.[reference:16]
Verify the recommended PCB footprint from the official datasheet before production.

6‑LEAD DFN

Pin Configuration Reference for LT6105IDCB#TRMPBF

LT6105

DFN TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. Exposed pad (Pin 7) is connected to V– and must be soldered to the PCB.[reference:17]

1 –IN Inverting Input (Sense Resistor Negative)

2 V+ Positive Supply (2.85V to 36V)

3 NC No Connect (may be left floating)

4 V– Negative Supply / Reference Ground

5 VOUT Amplifier Output

6 +IN Non‑inverting Input (Sense Resistor Positive)

APPLICATION AREAS

Typical Applications for LT6105IDCB#TRMPBF

High‑Side or Low‑Side Current Sensing

Monitor current in power rails, motor drives, and other unidirectional circuits with wide common‑mode requirements.[reference:18]

Battery Monitoring

Continuous current monitoring from full charge to depletion in battery systems, including multi‑cell stacks.[reference:19]

Fuse / MOSFET Monitoring

±44V differential input withstands transients from fuses or MOSFET switches, enabling protection and diagnostics.[reference:20]

Automotive Electronics

Wide temperature range (–40°C to 85°C) and common mode make it suitable for 12V/24V automotive systems.[reference:21]

Power Management

Monitor positive or negative supply rails for power conversion, load balancing, and overcurrent detection.[reference:22]

Portable Test & Measurement

Low power (150µA) and tiny DFN package suit battery‑powered handheld instruments and data loggers.[reference:23]

REPLACEMENT GUIDANCE

Selecting an Alternative for LT6105IDCB#TRMPBF

A replacement for the LT6105IDCB#TRMPBF should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Supply voltage range (2.85V–36V)

Input common mode range (–0.3V to 44V)

Gain configuration (external resistors)

Input offset voltage (300µV max)

CMRR (120dB) / PSRR (>100dB)

Bandwidth (100kHz) and slew rate (2V/µs)

Package dimensions (6‑lead DFN, 2mm × 3mm)

Operating temperature range (–40°C to 85°C)

Family alternatives: LT6105IDCB#TRPBF (tape and reel, 500 pieces), LT6105CDCB#TRMPBF (0°C to 70°C, cut tape), LT6105HDCB#TRMPBF (–40°C to 125°C, cut tape), LT6105IMS8#PBF (–40°C to 85°C, MSOP‑8 package).[reference:24] Select based on operating temperature, packaging, and board space requirements.

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MANUFACTURER INFORMATION

Analog Devices / Linear Technology

The LT6105IDCB#TRMPBF belongs to the precision current sense amplifier portfolio of Linear Technology, now part of Analog Devices. The family is designed for high‑accuracy, wide common‑mode current monitoring in industrial, automotive, and portable applications.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: LT6105IDCB#TRMPBF

Manufacturer: Analog Devices Inc.

Package: 6-WFDFN Exposed Pad

Series: -

Package/Case: 6-WFDFN Exposed Pad

Packaging: Tape & Reel (TR)

Product Status: Active

Amplifier Type: Current Sense

Number of Circuits: 1

Output Type: -

Slew Rate: 2V/µs

Gain Bandwidth Product: -

-3db Bandwidth: 100 kHz

Current - Input Bias: -

Voltage - Input Offset: 100 µV

Current - Supply: 250µA

Current - Output / Channel: 1 mA

Voltage - Supply Span (Min): 2.85 V

Voltage - Supply Span (Max): 36 V

Operating Temperature: -40°C ~ 85°C

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 6-DFN (2x3)

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Part Number: LT6105IDCB#TRMPBF

Manufacturer: Analog Devices Inc.

Package: 6-WFDFN Exposed Pad

Category: Instrumentation, Op Amps, Buffer Amps

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