Analog Devices Inc. LTC6102CDD#PBF

Overview

LTC6102CDD#PBF from Analog Devices (formerly Linear Technology) is a precision zero-drift high-side current sense amplifier in a 3mm × 3mm DFN-8 package. It operates from 4V to 60V supply, delivers ±10µV max input offset, ±50nV/°C drift, 1µs step response, and supports up to 2V differential sense voltage - enabling accurate battery monitoring and load protection in industrial power systems.

For engineers reviewing the LTC6102CDD#PBF datasheet, LTC6102CDD#PBF pinout, LTC6102CDD#PBF application, or LTC6102CDD#PBF equivalent, key selection criteria include its ground-referred current output architecture, Kelvin-compatible input structure, low-power operation at 475µA typical supply current, and compatibility with shunt resistors down to 1mΩ for high-current sensing.

Technical Context

The LTC6102CDD#PBF uses a precision current-output transconductance architecture: it forces –INS to match +IN potential via internal feedback, then converts V_SENSE across an external shunt into a proportional output current I_OUT = V_SENSE/R_IN. This eliminates common-mode voltage limitations on the output stage.

Its zero-drift chopper-stabilized core achieves ±10µV input offset and ±50nV/°C drift over –40°C to 85°C, while maintaining 130dB PSRR and 140kHz signal bandwidth. The device requires no external op-amp or level-shifting circuitry - simplifying high-voltage (>40V) current monitoring in automotive and telecom power supplies.

Key Specifications

Pinout & Package

Package: 8-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 9), RoHS-compliant, lead-free finish. Thermal resistance θ_JA = 43°C/W when exposed pad is soldered to PCB ground plane.

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 MAX4008AUB+, the LTC6102CDD#PBF provides superior offset performance (±10µV vs ±50–120µV), current-output architecture eliminating level-shift complexity, and lower power consumption - making it optimal for high-accuracy, high-voltage, space-constrained industrial current monitoring.

Availability

LTC6102CDD#PBF is available at Aetrix Electronics and suitable for battery management systems, industrial power supply protection, motor drive current feedback, and automotive load monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6102CDD#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) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs, serving industrial, automotive, communications, and healthcare markets.

The LTC6102 product line was designed specifically for precision high-side current sensing in harsh, high-voltage environments - emphasizing ultra-low offset, wide supply range, and Kelvin-input robustness for mission-critical power monitoring.

FAQ

What is the maximum sense voltage supported by the LTC6102CDD#PBF?

The LTC6102CDD#PBF supports a maximum differential sense voltage (V_+IN – V_–INS) of 2V with <1% error, as specified in the Electrical Characteristics table for V+ ≥6V. At V+ = 4V, the full-scale limit drops to 0.8V. This allows accurate monitoring of currents up to 2000A with appropriate shunt selection, provided power dissipation and thermal design constraints are met for the chosen R_SENSE.

Does the LTC6102CDD#PBF require external components to operate?

Yes - the LTC6102CDD#PBF requires two external resistors: R_IN (between V+ and –INF) to set transconductance gain, and R_OUT (between OUT and V–) to convert output current to voltage. A 0.1µF capacitor is also mandatory between VREG and V+. No external op-amp, level shifter, or reference is needed due to its integrated current-output architecture and internal regulation.

Can the LTC6102CDD#PBF be used with a 1mΩ shunt resistor?

Yes - the LTC6102CDD#PBF's ±10µV max input offset enables reliable use with 1mΩ shunts. At 10A load, V_SENSE = 10mV, yielding >1000:1 signal-to-offset ratio. Combined with ±50nV/°C drift, this maintains <±0.5mV total offset error over –40°C to 85°C, supporting high-accuracy, low-loss current sensing in high-current battery and power supply applications.

What is the function of the exposed pad (Pin 9) on the LTC6102CDD#PBF DFN package?

The exposed pad (Pin 9) on the LTC6102CDD#PBF is electrically connected to V– and serves as the primary thermal and electrical ground path. It must be soldered to a PCB copper pour tied to the system ground plane to achieve the specified θ_JA = 43°C/W and ensure stable operation under full-load conditions. Leaving it unconnected degrades thermal performance and may cause output instability or premature thermal shutdown.

How does the LTC6102CDD#PBF handle input transients on the +IN pin?

The +IN pin of the LTC6102CDD#PBF includes an integrated 5kΩ series resistor that protects against transients and accidental disconnection. It tolerates indefinite operation at up to 20V below –INS, and up to 60V below –INS for ≤1 second - meeting IEC 61000-4-5 surge immunity requirements for industrial equipment. This eliminates need for external TVS diodes in most 48V bus monitoring applications.