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LT6105IDCB#TRPBF

IC CURRENT SENSE 1 CIRCUIT 6DFN

Part Number
LT6105IDCB#TRPBF
Manufacturer
Analog Devices Inc.
Category
Instrumentation, Op Amps, Buffer Amps
Package
6-WFDFN Exposed Pad
Datasheet:
LT6105IDCB#TRPBF.pdf
Description
IC CURRENT SENSE 1 CIRCUIT 6DFN
Select Quantity Stock: 956
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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LT6105IDCB#TRPBF Precision Wide Common Mode Current Sense Amplifier

A comprehensive technical overview of the LT6105IDCB#TRPBF, 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#TRPBF
Mounting Type
Surface Mount
Operating Temperature Range
-40°C to +85°C
01
PRODUCT OVERVIEW

What Is the LT6105IDCB#TRPBF?

LT6105IDCB#TRPBF 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][reference:1]

The device features a very wide input common mode range that extends 44V above V– (independent of V+) and –0.3V below V–. This allows the LT6105IDCB#TRPBF to continuously monitor current in positive supply rails, negative rails, and even batteries from full charge to depletion without compromising accuracy.[reference:2][reference:3]

Gain is configurable with external resistors, ranging from 1V/V to 100V/V. With CMRR of 120dB, PSRR exceeding 100dB and input offset voltage below 300µV, the LT6105IDCB#TRPBF ensures high‑precision current measurement for demanding industrial, automotive, and portable systems.[reference:4][reference:5][reference:6]

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.
02
DEVICE HIGHLIGHTS

Key Features and Benefits of LT6105IDCB#TRPBF

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:7]

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:8]

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:9]

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:10][reference:11]

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:12]

Tiny DFN Package

Available in a space‑saving 2mm × 3mm 6‑lead DFN package, ideal for portable and compact electronic systems.[reference:13][reference:14]

03
REFERENCE DATA

Technical Specifications for LT6105IDCB#TRPBF

Part Number LT6105IDCB#TRPBF 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.

04
DESIGN REFERENCE

Gain Setting and Circuit Considerations for LT6105IDCB#TRPBF

Gain Setting

The LT6105IDCB#TRPBF gain is set by external resistors RIN and ROUT. The gain equation is:

AV = ROUT / RIN
  • Select RIN and ROUT to achieve gains from 1V/V to 100V/V.
  • Example: RIN = 100Ω, ROUT = 4.99kΩ gives a gain of ~50V/V.
  • 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 (RSENSE) 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 must be soldered to the PCB for proper thermal and electrical performance.
  • Verify the recommended PCB footprint from the official datasheet before production.
05
6‑LEAD DFN

Pin Configuration Reference for LT6105IDCB#TRPBF

LT6105
DFN TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. Exposed pad (Pin 7) is GND and must be soldered to the PCB.[reference:15]

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)
06
APPLICATION AREAS

Typical Applications for LT6105IDCB#TRPBF

High‑Side or Low‑Side Current Sensing

Monitor current in power rails, motor drives, and other unidirectional circuits with wide common‑mode requirements.[reference:16]

Battery Monitoring

Continuous current monitoring from full charge to depletion in battery systems, including multi‑cell stacks.[reference:17]

Fuse / MOSFET Monitoring

±44V differential input withstands transients from fuses or MOSFET switches, enabling protection and diagnostics.[reference:18]

Automotive Electronics

Wide temperature range (–40°C to 85°C) and common mode make it suitable for 12V/24V automotive systems.[reference:19]

Power Management

Monitor positive or negative supply rails for power conversion, load balancing, and overcurrent detection.[reference:20]

Portable Test & Measurement

Low power (150µA) and tiny DFN package suit battery‑powered handheld instruments and data loggers.[reference:21]

07
REPLACEMENT GUIDANCE

Selecting an Alternative for LT6105IDCB#TRPBF

A replacement for the LT6105IDCB#TRPBF 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#TRMPBF (cut tape, same specs), LT6105CDCB#TRPBF (0°C to 70°C, tape and reel), LT6105IMS8#PBF (–40°C to 85°C, MSOP‑8 package), LT6105CMS8#PBF (0°C to 70°C, MSOP‑8 package). Select based on operating temperature, packaging, and board space requirements.

Alternative Part Support

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MANUFACTURER INFORMATION

Analog Devices / Linear Technology

The LT6105IDCB#TRPBF 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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LT6105IDCB#TRPBF Technical Information

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Specifications

Product Attribute
Attribute Value
Part Number
LT6105IDCB#TRPBF
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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LT6105IDCB#TRPBF is manufactured by Analog Devices Inc.. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number
LT6105IDCB#TRPBF
Manufacturer
Analog Devices Inc.
Package
6-WFDFN Exposed Pad
Category
Instrumentation, Op Amps, Buffer Amps
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