Analog Devices Inc. LT6370IS8E#PBF

Overview

LT6370IS8E#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 CMRR at G=1, 3.1MHz bandwidth, and integrated RFI filtering - designed for precision bridge and thermocouple signal conditioning in industrial data acquisition systems.

For engineers reviewing the LT6370IS8E#PBF datasheet, LT6370IS8E#PBF pinout, LT6370IS8E#PBF application, or LT6370IS8E#PBF equivalent, this page provides verified DC precision specs, thermal stability data, gain-setting resistor guidance, and real-world transducer interface use cases - all validated against the official LT6370 Rev. 0 datasheet and Analog Devices' S8E package characterization.

Technical Context

The LT6370IS8E#PBF implements an enhanced three-op-amp instrumentation topology with laser-trimmed 12.1kΩ internal resistors and proprietary bipolar process transistors (Q1/Q2), enabling guaranteed 0.3µV/°C input offset drift and 30ppm/°C gain drift over –40°C to 85°C. Its gain is set by a single external resistor RG per G = 1 + 24.2kΩ/RG.

EMI filtering is integrated on both inputs, and the REF pin supports differential-to-single-ended conversion with ±10V input range referenced to V–/V+. The device maintains 94dB DC CMRR and >112dB CMRR at G=10 up to 60Hz, with AC CMRR reaching 103dB at 20kHz in the S8E package.

Key Specifications

Pinout & Package

LT6370IS8E#PBF uses an 8-lead plastic SOIC (S8E) package with standard instrumentation amplifier pinout and exposed pad (Pin 9) that must float or connect to V+ (Pin 7). Thermal resistance θ_JA = 33°C/W, θ_JC = 5°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8421ARZ and INA128UA, the LT6370IS8E#PBF delivers superior DC precision (25µV offset, 0.3µV/°C drift) and integrated RFI filtering - making it optimal for high-accuracy, noise-prone transducer interfaces where long-term calibration stability is mandatory.

Availability

LT6370IS8E#PBF is available at Aetrix Electronics and suitable for industrial data acquisition, precision bridge sensing, and thermocouple conditioning requiring stable component supply across extended temperature ranges (–40°C to 85°C).

Supply support for LT6370IS8E#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 since 1965.

The LT6370 product line was engineered for ultra-precision transducer signal conditioning - targeting applications demanding sub-microvolt offset stability, low thermal drift, and robust EMI immunity in harsh electrical environments.

FAQ

What is the maximum gain achievable with LT6370IS8E#PBF using a standard 1% resistor?

The LT6370IS8E#PBF supports gains up to >1000 using a single external resistor RG. For G=1000, RG = 24.3Ω (1% standard value), as confirmed in Table 1 of the LT6370 Rev. 0 datasheet. At such low RG values, PCB trace resistance becomes a significant error source, so layout best practices (short, wide traces; Kelvin connections) are essential for maintaining <0.1% gain accuracy in the LT6370IS8E#PBF.

Does LT6370IS8E#PBF require external capacitors on the +IN and –IN pins for EMI filtering?

No - the LT6370IS8E#PBF integrates RFI filters directly on the +IN and –IN pins, eliminating the need for external RC networks. This is explicitly stated in the FEATURES section and verified in the TYPICAL APPLICATION schematic (TA01a), where no external filtering components appear on those inputs. The integrated filter provides >120dB EMIRR at 100MHz, ensuring robust operation in electrically noisy environments without added BOM cost or board space for the LT6370IS8E#PBF.

What is the recommended bypass capacitor value for V+ and V– pins of LT6370IS8E#PBF?

Analog Devices specifies a 0.1µF ceramic capacitor (X7R or better) placed as close as possible to each supply pin (V+ and V–) and grounded, per the PIN FUNCTIONS section and layout guidelines in the LT6370 Rev. 0 datasheet. This value is validated for stable operation across the full 4.75V–35V supply range and prevents high-frequency oscillation or supply-induced errors in the LT6370IS8E#PBF.

Can LT6370IS8E#PBF operate from a single 5V supply?

Yes - the LT6370IS8E#PBF supports single-supply operation down to 4.75V total (e.g., V+ = 5V, V– = 0V). In this configuration, the input common-mode range is 1.8V to 3.6V, and output swing reaches 0.1V to 4.9V (RL = 10kΩ), as shown in Figure F01f. The REF pin allows level-shifting the output to match ADC reference levels, making the LT6370IS8E#PBF suitable for 5V microcontroller-based DAQ systems.

How does the REF pin function in LT6370IS8E#PBF, and what is its input impedance?

The REF pin sets the output common-mode voltage for the LT6370IS8E#PBF, with a gain of exactly 1 from REF to OUTPUT (±20ppm error). Its input impedance is 20kΩ (R_REFIN), and input current ranges from –60µA to +6µA depending on common-mode voltage, as specified in the ELECTRICAL CHARACTERISTICS table. This allows direct connection to precision voltage references or DAC outputs without buffering when driving the LT6370IS8E#PBF REF pin.