Analog Devices Inc. LT6370HDD#PBF

Overview

LT6370HDD#PBF from Analog Devices is a high-precision, gain-programmable instrumentation amplifier in a 10-pin 3mm × 3mm DFN package (H-grade, –40°C to 125°C), featuring 25µV max input offset voltage, 0.3µV/°C max drift, 94dB min DC CMRR at G = 1, 3.1MHz bandwidth, and integrated RFI filtering - deployed in precision bridge transducer signal conditioning for industrial sensor systems.

For engineers reviewing the LT6370HDD#PBF datasheet, LT6370HDD#PBF pinout, LT6370HDD#PBF application, or LT6370HDD#PBF equivalent, key selection criteria include guaranteed input offset drift over extended temperature, RTI noise performance below 7nV/√Hz, gain error ≤0.01% at G = 1, EMI-hardened inputs, and compatibility with single-resistor gain programming from 1 to >1000.

Technical Context

The LT6370HDD#PBF implements an enhanced three-op-amp instrumentation topology with laser-trimmed 12.1kΩ internal resistors enabling accurate gain setting via a single external resistor (RG), where G = 1 + 24.2kΩ/RG. Its proprietary bipolar process ensures matched input transistor pairs (Q1/Q2) for ultra-low drift and bias current.

Input stage transconductance scales with gain, preserving bandwidth (3.1MHz at G = 1, 184kHz at G = 100) and reducing input-referred errors at higher gains. The REF pin provides precise output level shifting, while on-chip EMI filters maintain DC accuracy under RF interference up to 1GHz.

Key Specifications

Pinout & Package

LT6370HDD#PBF uses a 10-pin 3mm × 3mm plastic DFN package (exposed pad connected to V–). Pin functions are validated per Analog Devices' official pin configuration diagram (Rev. 0, p. 2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8429ARZ and INA828IDRCT, the LT6370HDD#PBF uniquely combines guaranteed 0.3µV/°C drift, integrated EMI filtering, and single-resistor programmability - making it optimal for high-stability, noise-immune industrial sensing where calibration intervals must exceed 10 years.

Availability

LT6370HDD#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive under-hood monitoring, and medical device signal chains requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LT6370HDD#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. 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 DC-critical applications including strain gauges, thermocouples, and bridge-based transducers - emphasizing long-term stability, low drift, and EMI robustness.

FAQ

What is the maximum guaranteed input offset voltage for LT6370HDD#PBF over its full operating temperature range?

The LT6370HDD#PBF has a maximum input offset voltage of ±150µV over the –40°C to 125°C range, as specified in the Electrical Characteristics table (DD10 Package, H-grade). This value includes both initial offset and drift contribution, ensuring predictable error budgeting in high-temperature industrial deployments where the LT6370HDD#PBF is commonly used.

Does LT6370HDD#PBF support single-supply operation, and what is the minimum total supply voltage?

Yes, the LT6370HDD#PBF supports true single-supply operation down to 4.75V total supply (e.g., V+ = 4.75V, V– = 0V). Its input common-mode range extends to V– + 1.8V and V+ – 1.4V, and output swings to within 1.3V of each rail under load - enabling direct interfacing with 5V microcontrollers and ADCs without level-shifting. This capability is explicitly validated for the LT6370HDD#PBF in the Absolute Maximum Ratings and Electrical Characteristics sections.

How does the LT6370HDD#PBF achieve guaranteed 0.3µV/°C input offset drift?

The LT6370HDD#PBF achieves guaranteed 0.3µV/°C input offset drift through proprietary on-chip test capability applied during automated final test in the S8E and DD10 packages, combined with laser trimming of input transistor pairs (Q1/Q2) and bias current sources (I3/I6) on Analog Devices' high-performance bipolar process. This drift specification is explicitly validated for the LT6370HDD#PBF's DFN package across –40°C to 125°C per the datasheet's Electrical Characteristics table.

Can LT6370HDD#PBF drive a 600Ω load while maintaining specified gain nonlinearity?

Yes, the LT6370HDD#PBF maintains specified gain nonlinearity (≤50ppm at G = 100) into a 600Ω load, as confirmed in the Electrical Characteristics table under "Gain Nonlinearity" conditions. Its output stage delivers ±14.9V swing at VS = ±15V and RL = 10kΩ, and retains linearity even under heavier loads due to robust output current capability (±35mA short-circuit current) and low output impedance - a key design feature of the LT6370HDD#PBF for driving legacy data acquisition systems.

What is the role of the REF pin in LT6370HDD#PBF, and what voltage range can it accept?

The REF pin in the LT6370HDD#PBF sets the output DC reference level, allowing level-shifting of the amplified differential signal to match downstream ADC or controller input ranges. It accepts any voltage from V– to V+, with 20kΩ input resistance and ±60µA max input current. For example, applying 2.5V to REF centers the output at 2.5V - a capability fully characterized and guaranteed for the LT6370HDD#PBF in the Electrical Characteristics table under "VREF" and "AVREF" parameters.