Analog Devices Inc. LTC6101HVAIS5#TRPBF

Overview

LTC6101HVAIS5#TRPBF from Analog Devices is a high-voltage, high-side current sense amplifier in 5-lead TSOT-23 package, delivering ±300 µV max input offset voltage, 1 µs step response (to 2.5 V on 5 V output step), and operation from 5 V to 100 V supply. It converts shunt voltage into ground-referenced output current for precision monitoring in battery management and industrial power rails.

For engineers reviewing the LTC6101HVAIS5#TRPBF datasheet, LTC6101HVAIS5#TRPBF pinout, LTC6101HVAIS5#TRPBF application, or LTC6101HVAIS5#TRPBF equivalent, key selection criteria include high common-mode voltage support (up to 100 V), low quiescent current (350 µA at 100 V), PSRR ≥118 dB, –40°C to 85°C operating range, and SOT-23 footprint compatibility with Kelvin-sense layout requirements.

Technical Context

The LTC6101HVAIS5#TRPBF uses a precision current-output architecture where VSENSE across an external shunt drives output current IOUT = VSENSE/RIN, enabling accurate level-shifting from high common-mode voltages to ground-referenced signals. Its internal amplifier forces –IN to match +IN potential, eliminating gain dependency on internal resistor matching.

It supports configurable gain via external RIN and ROUT resistors (e.g., gain = 20 with RIN = 499 Ω, ROUT = 10 kΩ), delivers 140 kHz signal bandwidth at 200 µA load, and maintains 118 dB PSRR over 5–100 V supply range - critical for noise-immune sensing in switching power supplies and motor drives.

Key Specifications

Pinout & Package

Package: 5-lead TSOT-23 (ThinSOT™), 1 mm profile, HV-optimized spacing per Absolute Maximum Rating of 105 V total supply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40056ASA+T and INA240A1DGNR, the LTC6101HVAIS5#TRPBF offers unique 100 V operation and fully configurable gain via external resistors - essential for legacy 96 V telecom or new energy storage systems where supply headroom and design reuse drive component selection.

Availability

LTC6101HVAIS5#TRPBF is available at Aetrix Electronics and suitable for battery management systems, industrial power supplies, automotive dual-battery monitors, and telecom rectifier current sensing requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for LTC6101HVAIS5#TRPBF 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 (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC6101HV product line was designed specifically for high-voltage, high-side current sensing in harsh environments - emphasizing low offset, wide supply range, and Kelvin-input layout resilience for mission-critical power monitoring.

FAQ

What is the maximum common-mode voltage the LTC6101HVAIS5#TRPBF can measure?

The LTC6101HVAIS5#TRPBF does not measure common-mode voltage directly; it operates with supply voltage up to 100 V and supports input sense voltage up to 500 mV. Its architecture enables accurate sensing on high-side shunts where the shunt's high-side node sits at up to 100 V - verified by its 105 V absolute maximum total supply rating (V+ to V–). This makes LTC6101HVAIS5#TRPBF suitable for 48 V, 72 V, and 96 V bus monitoring.

Can the LTC6101HVAIS5#TRPBF be used with a single 5 V supply?

No - the LTC6101HVAIS5#TRPBF requires a minimum supply voltage of 5 V, but its functionality depends on the voltage difference between V+ and V–. With V– grounded, V+ must be ≥5 V. However, the device is optimized for high-side sensing where V+ connects to the high-potential side of the shunt; using only 5 V limits common-mode headroom and violates the intended high-voltage use case. The LTC6101HVAIS5#TRPBF is not recommended for low-voltage (<12 V) shunt monitoring.

How does the LTC6101HVAIS5#TRPBF achieve ground-referenced output with high common-mode input?

The LTC6101HVAIS5#TRPBF achieves ground-referenced output through a current-output architecture: it forces –IN to match +IN potential, then sources IOUT = VSENSE/RIN from the OUT pin. When ROUT is connected from OUT to V– (ground), VOUT = IOUT × ROUT becomes ground-referenced. This eliminates reliance on internal resistor matching and avoids level-shifter complexity - a core design feature confirmed in the LTC6101HVAIS5#TRPBF block diagram and theory-of-operation section.

What is the purpose of the NC pins in the SOT-23 package of the LTC6101HVAIS5#TRPBF?

The LTC6101HVAIS5#TRPBF uses the standard 5-lead TSOT-23 pinout (no NC pins): Pin 1 = +IN, Pin 2 = –IN, Pin 3 = V+, Pin 4 = V–, Pin 5 = OUT. Unlike the MSOP variant, the SOT-23 version has no no-connect (NC) terminals - all five pins are functional and electrically assigned per the official Analog Devices pin configuration diagram. Misidentification of NC pins may arise from confusion with the 8-lead MSOP variant, which does include NC pins.

Does the LTC6101HVAIS5#TRPBF support bidirectional current sensing?

No - the LTC6101HVAIS5#TRPBF is a unidirectional high-side current sense amplifier. Its architecture sources output current proportional to VSENSE = V(+IN) – V(–IN), which is inherently positive when +IN is at higher potential than –IN (standard high-side configuration). It cannot resolve negative VSENSE or reverse current flow. For bidirectional applications, designers must select alternatives like the INA240 or dual-configuration discrete solutions - a limitation explicitly stated in the LTC6101HVAIS5#TRPBF datasheet features and applications sections.