Analog Devices Inc. LTC6102HDD-1#PBF

Overview

LTC6102HDD-1#PBF from Analog Devices (formerly Linear Technology) is a precision zero-drift high-side current sense amplifier in 3mm × 3mm DFN-8 package with integrated disable mode. It operates from 4V to 60V supply, delivers ±10µV max input offset, ±50nV/°C drift, 1µs step response, and supports up to 2V input sense voltage - enabling accurate battery monitoring and load protection in automotive power management systems.

For engineers reviewing the LTC6102HDD-1#PBF datasheet, LTC6102HDD-1#PBF pinout, LTC6102HDD-1#PBF application, or LTC6102HDD-1#PBF equivalent, key selection criteria include its enable-controlled low-power mode (1µA max), Kelvin-compatible input architecture, ground-referred current-output interface, and guaranteed –40°C to 125°C operation in the DFN package.

Technical Context

The LTC6102HDD-1#PBF implements a precision current-to-current transducer architecture: an internal sense amplifier forces –INS to track +IN, while RIN between V+ and –INF sets transconductance (IOUT = VSENSE/RIN). Its zero-drift chopper-stabilized core maintains accuracy across temperature and supply variations without external calibration.

Unlike conventional current-sense amplifiers, it uses open-drain current output referenced to V–, requiring external ROUT to generate a ground-referred voltage. The EN pin (Pin 3) enables/disables the entire signal path, reducing quiescent current to ≤1µA at 12V supply - critical for always-on automotive subsystems.

Key Specifications

Pinout & Package

Package: 8-lead 3mm × 3mm plastic DFN with exposed pad (Pin 9 = V–), RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the LTC6102HDD-1#PBF offers the lowest offset drift and fastest response among automotive-qualified current sense amplifiers with enable functionality - making it optimal for precision battery monitoring and rapid fault shutdown where thermal stability and speed are paramount.

Availability

LTC6102HDD-1#PBF is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, and telecom power supply applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6102HDD-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-sense, power management, and signal conditioning ICs.

The LTC6102 product line was designed specifically for high-accuracy, high-voltage, high-side current sensing in harsh environments - targeting automotive, industrial, and energy storage systems where offset stability and reliability are non-negotiable.

FAQ

What is the maximum common-mode voltage the LTC6102HDD-1#PBF can handle?

The LTC6102HDD-1#PBF supports a maximum total supply voltage of 70V (V+ to V–), with absolute maximum input voltages of (V+ – 20V) on +IN and (V+ – 4V) on –INF/–INS. This allows reliable operation with common-mode voltages up to 60V above ground - sufficient for 48V automotive systems and industrial 60V bus monitoring. Exceeding these ratings risks permanent damage per Absolute Maximum Ratings table.

How does the enable pin (EN) function on the LTC6102HDD-1#PBF?

The EN pin (Pin 3) on the LTC6102HDD-1#PBF is an active-high logic input that controls device power state. When pulled ≥2.2V relative to V–, the amplifier operates normally with typical supply current of 450µA at 12V. When pulled ≤0.8V, the LTC6102HDD-1#PBF enters disable mode, reducing supply current to ≤1µA. Floating EN defaults to disabled state - ensuring fail-safe low-power behavior during system initialization.

Can the LTC6102HDD-1#PBF drive a capacitive load directly?

No, the LTC6102HDD-1#PBF features an open-drain current-output stage (OUT pin) and cannot directly drive capacitive loads. It requires an external pull-up resistor (ROUT) to V– to convert output current into a voltage. Driving capacitive loads without proper RC filtering causes instability and overshoot. For filtered outputs, place a capacitor (e.g., 100pF–1nF) in parallel with ROUT - verified in Typical Performance Characteristics Figure G15/G17 showing stable step response with CLOAD = 10pF and 1000pF.

What shunt resistor value is recommended for 100A peak current measurement with the LTC6102HDD-1#PBF?

For 100A peak current and 2V full-scale input sense voltage, a 20mΩ shunt resistor is recommended (VSENSE = I × R = 100A × 20mΩ = 2V). This yields 100W peak dissipation - acceptable only with forced-air cooling or specialized low-TCR shunts. For lower power loss, use a 100µΩ shunt with RIN = 1Ω and ROUT = 4.99kΩ (gain = 4990×), achieving 2V output at 100A while dissipating only 1W - enabled by the LTC6102HDD-1#PBF's 10µV offset floor and Kelvin input architecture.

Is the LTC6102HDD-1#PBF pin-compatible with other variants in the LTC6102 family?

Yes, the LTC6102HDD-1#PBF shares identical pinout and footprint with all LTC6102/LTC6102-1 variants in the 3mm × 3mm DFN-8 package (e.g., LTC6102HDD#PBF, LTC6102IDD-1#PBF). Differences are limited to temperature grade (H = –40°C to 125°C), enable functionality (suffix -1), and internal trimming - allowing drop-in replacement within the same package variant without PCB changes.