Analog Devices Inc. LTC6102IDD-1#PBF

Overview

LTC6102IDD-1#PBF from Analog Devices (formerly Linear Technology) is a precision zero-drift high-side current sense amplifier with integrated disable mode, designed for accurate load current monitoring in industrial power supplies and battery management systems. It features ±10 µV max input offset, ±50 nV/°C max drift, 1 µs step response, 4 V to 60 V supply range, and operates from –40°C to +85°C in an 8-lead 3mm × 3mm DFN package.

For engineers reviewing the LTC6102IDD-1#PBF datasheet, LTC6102IDD-1#PBF pinout, LTC6102IDD-1#PBF application, or LTC6102IDD-1#PBF equivalent, key selection criteria include disable-mode quiescent current (≤1 µA), input offset stability over temperature, gain configuration flexibility via external R_IN/R_OUT, common-mode voltage tolerance up to 60 V, and compatibility with low-value shunt resistors down to 1 mΩ.

Technical Context

The LTC6102IDD-1#PBF implements a precision transconductance architecture: its internal sense amplifier forces –INS to track +IN, enabling accurate differential sensing across an external shunt while rejecting high common-mode voltages. Input bias current is limited to ≤3 nA, supporting high-impedance gain-setting networks without significant error.

Its open-drain current-output stage delivers up to 1 mA proportional to V_SENSE/R_IN, allowing ground-referenced voltage translation via R_OUT. The enable pin (EN) controls full device shutdown, reducing supply current to ≤1 µA at V₊ = 12 V - critical for standby power optimization in energy-sensitive systems.

Key Specifications

Pinout & Package

Package: 8-lead 3 mm × 3 mm plastic DFN (DD package) with exposed thermal pad connected to V–. Pin 9 (exposed pad) must be soldered to PCB for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and MAX40056ATA+T, the LTC6102IDD-1#PBF uniquely combines programmable transconductance gain, 1 µA disable current, and 4–60 V operation - making it optimal for industrial systems requiring both wide input range and energy-efficient sleep modes.

Availability

LTC6102IDD-1#PBF is available at Aetrix Electronics and suitable for battery management systems, industrial power supply monitoring, and motor drive current protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6102IDD-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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC6102 product line was developed by Linear Technology (acquired by ADI in 2017) specifically for precision high-side current sensing in harsh, wide-supply environments - emphasizing ultra-low offset, high CMRR, and robust thermal performance.

FAQ

What is the maximum common-mode voltage the LTC6102IDD-1#PBF can handle?

The LTC6102IDD-1#PBF supports a maximum common-mode input voltage of V+ − 20 V on the +IN pin and V+ + 0.3 V on the –INF/–INS pins. With its 60 V maximum supply rating, this allows reliable operation with common-mode voltages up to 60 V - sufficient for most 48 V industrial and telecom applications. Absolute maximum ratings specify –INF/–INS may tolerate up to V+ + 0.3 V continuously, and +IN may withstand up to V+ − 20 V indefinitely.

How does the disable mode of the LTC6102IDD-1#PBF reduce system power consumption?

The LTC6102IDD-1#PBF enters ultra-low-power disable mode when the EN pin is pulled below 0.8 V, reducing supply current to ≤1 µA at V+ = 12 V. This eliminates static current draw during system sleep or standby, significantly extending battery life in portable equipment and lowering idle power in always-on infrastructure. The device resumes full operation within 500 µs after EN rises above 2.2 V.

Can the LTC6102IDD-1#PBF be used with a 1 mΩ shunt resistor?

Yes - the LTC6102IDD-1#PBF's ±10 µV max input offset and ±50 nV/°C drift make it suitable for 1 mΩ shunts. At 10 A load, V_SENSE = 10 mV, yielding >1000:1 signal-to-offset ratio. Combined with its 1 µs response and 130 dB PSRR, the LTC6102IDD-1#PBF maintains accuracy and noise immunity even at such low shunt values, minimizing power loss and thermal stress.

What is the purpose of the VREG pin on the LTC6102IDD-1#PBF?

The VREG pin on the LTC6102IDD-1#PBF provides an internally regulated bias voltage for core amplifier circuitry. It must be decoupled with ≥0.1 µF capacitor to V+, but is not intended to power external components. Using VREG as a supply rail will degrade performance and is prohibited per datasheet guidelines. Its sole function is internal stabilization under varying V+ conditions.

Does the LTC6102IDD-1#PBF require external compensation components?

No - the LTC6102IDD-1#PBF is internally compensated and operates stably with standard R_IN/R_OUT configurations. Its current-output architecture avoids phase-margin issues associated with voltage-output amplifiers driving capacitive loads. However, if R_OUT drives >100 pF (e.g., long traces or ADC input capacitance), a small series resistor (≤10 Ω) at the OUT pin is recommended to prevent peaking.