Analog Devices Inc. LT6370AIS8E#PBF

Overview

LT6370AIS8E#PBF from Analog Devices is a gain-programmable, high-precision instrumentation amplifier in an 8-lead SOIC (S8E) package, delivering 25µV max input offset voltage, 0.3µV/°C max drift, 94dB min DC CMRR at G=1, and 3.1MHz bandwidth. It serves as a low-noise, EMI-hardened front-end for precision sensor signal conditioning in industrial and medical data acquisition systems.

For engineers reviewing the LT6370AIS8E#PBF datasheet, LT6370AIS8E#PBF pinout, LT6370AIS8E#PBF application, or LT6370AIS8E#PBF equivalent, this page provides verified DC precision specs, validated S8E package pin functions, real-world bridge and thermocouple use cases, and two confirmed alternative parts with documented performance trade-offs.

Technical Context

The LT6370AIS8E#PBF implements an enhanced three-op-amp topology with laser-trimmed 12.1kΩ internal resistors and proprietary bipolar process transistors (Q1/Q2) to achieve ultra-low drift and matched gain-setting accuracy. Its gain equation G = 1 + 24.2kΩ/RG enables precise programmability from 1 to >1000 using a single external resistor.

Integrated EMI filtering on both inputs maintains DC precision under RF interference, while automated on-chip testing guarantees 0.3µV/°C input offset drift and 30ppm/°C gain drift over –40°C to 85°C. The REF pin supports differential-to-single-ended conversion with ±10V range and 1V/V gain.

Key Specifications

Pinout & Package

LT6370AIS8E#PBF uses the standard instrumentation amplifier pinout in an 8-lead plastic SOIC (S8E) package. The exposed pad (Pin 9) must float or connect to V+ (Pin 7), not V–.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar instrumentation amplifier applications.

Compared with AD8429ARZ and INA826AIDGKR, LT6370AIS8E#PBF uniquely balances ultra-low drift (0.3µV/°C), integrated EMI filtering, and REF-pin-based level shifting-making it optimal for high-stability industrial bridge and thermocouple systems where long-term calibration integrity is critical.

Availability

LT6370AIS8E#PBF is available at Aetrix Electronics and suitable for bridge amplifier, thermocouple measurement, and precision data acquisition requiring stable component supply across extended temperature ranges.

Supply support for LT6370AIS8E#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LT6370 product line delivers ultra-precision instrumentation amplifiers optimized for sensor signal conditioning in harsh electromagnetic environments, emphasizing long-term stability and guaranteed drift performance over temperature.

FAQ

What is the maximum guaranteed input offset voltage for LT6370AIS8E#PBF over temperature?

The LT6370AIS8E#PBF has a maximum input offset voltage of ±25µV over the full –40°C to 85°C operating range. This specification is laser-trimmed and guaranteed by automated on-chip testing, not just characterized. The A-grade variant (denoted by "A" in LT6370A) provides tighter DC specifications than the base LT6370, making LT6370AIS8E#PBF suitable for applications demanding highest initial accuracy without post-manufacture calibration.

How does the LT6370AIS8E#PBF achieve guaranteed 0.3µV/°C offset drift?

The LT6370AIS8E#PBF achieves guaranteed 0.3µV/°C input offset drift through proprietary on-chip test capability that validates drift during automated final test. Unlike typical characterization-only specs, this drift value is measured and binned per unit in the S8E package. The underlying mechanism combines laser-trimmed transistor matching (Q1/Q2), constant-current biasing, and monolithic construction on a high-performance bipolar process-all confirmed in the LT6370AIS8E#PBF datasheet Rev. 0 electrical characteristics table.

Can LT6370AIS8E#PBF operate from a single 5V supply?

Yes, LT6370AIS8E#PBF supports single-supply operation from 4.75V to 35V total supply voltage. With a 5V supply (V+ = 5V, V– = 0V), its output swings from 0.1V to 4.9V into 10kΩ, and input common-mode range extends from 1.9V to 3.6V. The REF pin allows setting output mid-point anywhere between V– and V+, enabling true single-supply interfacing with 3.3V or 5V ADCs without level-shifting circuitry-confirmed in the LT6370AIS8E#PBF absolute maximum ratings and electrical characteristics tables.

What is the purpose of the REF pin on LT6370AIS8E#PBF?

The REF pin on LT6370AIS8E#PBF sets the output voltage reference level, enabling differential-to-single-ended conversion with user-defined common-mode output. It accepts voltages from V– to V+, has 20kΩ input resistance, and exhibits ±10µA input current. When REF = 0V, output is centered at 0V; when REF = 2.5V, output swings symmetrically around 2.5V. This eliminates external op-amps for level-shifting in systems like isolated DAQ modules-directly supported by the LT6370AIS8E#PBF simplified block diagram and applications information section.

Does LT6370AIS8E#PBF include EMI filtering, and how is it implemented?

Yes, LT6370AIS8E#PBF integrates EMI filtering on both input terminals, as shown in the Simplified Block Diagram (Page 14) with explicit "EMI FILTER" labels on +IN and –IN paths. This on-die RC filtering suppresses RF interference up to 1GHz, preventing rectification-induced DC errors. Measured EMIRR exceeds 120dB at 900MHz, ensuring stable offset and gain in electrically noisy environments like motor drives or switch-mode power supplies-verified in the Typical Performance Characteristics section (Figure 6370 G36).