Analog Devices Inc. LTC6102IMS8-1#PBF

Overview

LTC6102IMS8-1#PBF from Analog Devices (formerly Linear Technology) is a precision zero-drift high-side current sense amplifier in 8-lead MSOP package, featuring ±10 µV max input offset, ±50 nV/°C max drift, 1 µs step response, and integrated disable mode. It converts shunt voltage to ground-referred output current for accurate battery monitoring and load protection in industrial power systems operating up to 60 V.

For engineers reviewing the LTC6102IMS8-1#PBF datasheet, LTC6102IMS8-1#PBF pinout, LTC6102IMS8-1#PBF application, or LTC6102IMS8-1#PBF equivalent, key selection criteria include input offset stability over temperature, disable-mode quiescent current (≤1 µA), gain configuration via external R_IN/R_OUT, common-mode input range (up to V+ – 20 V), and MSOP-8 thermal performance (θ_JA = 200°C/W).

Technical Context

The LTC6102IMS8-1#PBF implements a precision current-to-current transducer architecture with a feedback-controlled inverting input (–INS) forced to match +IN potential, enabling accurate sensing across wide common-mode voltages. Its internal regulated VREG rail powers bias circuitry independently of supply variations.

It operates as a high-voltage, low-drift current mirror: V_SENSE across an external shunt develops I_OUT = V_SENSE/R_IN sourced from the OUT pin, with gain set by R_IN and R_OUT. The EN pin (Pin 3) enables low-power shutdown, reducing supply current to ≤1 µA at 12 V.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (MS8), 3.0 mm × 3.0 mm × 1.1 mm, exposed pad not present (DFN variant has exposed V– pad; MSOP does not).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current sense amplifier applications.

Compared with INA240A1QDGKRQ1 and MAX40056ATA+T, the LTC6102IMS8-1#PBF uniquely combines 60 V operation, sub-10 µV offset, and 1 µA disable current-enabling high-accuracy, low-quiescent monitoring in space-constrained industrial battery and power shelf designs where supply voltage and power budget vary widely.

Availability

LTC6102IMS8-1#PBF is available at Aetrix Electronics and suitable for battery management systems, industrial motor drives, telecom power shelves, and server rack PSUs requiring stable component supply across extended temperature and voltage ranges.

Supply support for LTC6102IMS8-1#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices acquired Linear Technology in 2017 and maintains its precision analog portfolio, including high-performance current sensing, power management, and signal conditioning ICs.

The LTC6102 product line was designed for high-accuracy, high-voltage, high-side current measurement in demanding industrial, automotive, and telecom power systems-emphasizing zero-drift stability, wide common-mode range, and flexible gain configuration.

FAQ

What is the maximum common-mode voltage the LTC6102IMS8-1#PBF can handle at the +IN pin?

The +IN pin of the LTC6102IMS8-1#PBF tolerates voltages up to 20 V below the –INS pin continuously, and up to 60 V below –INS for ≤1 second. With V+ at 60 V and –INS at V+, +IN may be as low as 40 V (V+ – 20 V) under steady-state conditions-enabling direct connection to the load side of high-side shunts in 48 V systems.

Does the LTC6102IMS8-1#PBF require external components to operate, and if so, which ones are mandatory?

Yes, the LTC6102IMS8-1#PBF requires three mandatory external components: (1) R_IN between V+ and –INF to set transconductance gain, (2) R_OUT between OUT and V– to convert output current to voltage, and (3) a 0.1 µF capacitor from VREG to V+. Omitting any of these prevents proper biasing, gain setting, or regulation-rendering the LTC6102IMS8-1#PBF nonfunctional.

How does the disable mode of the LTC6102IMS8-1#PBF affect output behavior and settling time?

When disabled (EN ≤ 0.8 V), the LTC6102IMS8-1#PBF shuts down internal amplifiers and bias circuits, reducing supply current to ≤1 µA. The OUT pin enters high-impedance state-no current sourcing-and output voltage collapses to V–. Turn-off time is ≤100 µs; turn-on time to 1% final value is ≤500 µs, ensuring rapid reactivation without overshoot.

Can the LTC6102IMS8-1#PBF be used with a 1 Ω sense resistor, and what design trade-offs arise?

Yes-the LTC6102IMS8-1#PBF supports R_SENSE values from 10 µΩ to >1 Ω. Using 1 Ω requires V_SENSE ≤ 2 V (per spec), limiting full-scale current to 2 A. This increases shunt power loss (4 W at 2 A) but improves SNR and reduces sensitivity to noise and layout parasitics-ideal for low-current, high-precision lab equipment rather than high-power systems.

What is the role of the VREG pin on the LTC6102IMS8-1#PBF, and why must it be decoupled?

The VREG pin on the LTC6102IMS8-1#PBF provides an internally regulated ~3.3 V supply for precision bias circuitry. It must be decoupled with ≥0.1 µF to V+ to suppress high-frequency noise and prevent oscillation in the reference generator. Failure to decouple causes increased offset drift, elevated output noise, and potential instability-degrading the core zero-drift advantage of the LTC6102IMS8-1#PBF.