Texas Instruments INA597IDT

Overview

INA597IDT from Texas Instruments is a high-precision, wide-bandwidth e-trim™ difference amplifier optimized for industrial voltage sensing and high-voltage data acquisition. It delivers 200 μV maximum offset voltage, ±5 μV/°C drift, 88 dB minimum CMRR, 2-MHz gain-bandwidth, and operates from ±2.25 V to ±18 V dual supply or 4.5 V to 36 V single supply - enabling accurate differential signal conditioning in flow transmitters and servo drive feedback circuits.

For engineers reviewing the INA597IDT datasheet, INA597IDT pinout, INA597IDT application, or INA597IDT equivalent, this page provides verified technical context, validated pin functions for SOIC-8 package, confirmed G = 1/2 and G = 2 configurations, real-world application constraints (e.g., 500-pF capacitive load drive), and two rigorously cross-checked alternative parts with documented functional trade-offs.

Technical Context

The INA597IDT integrates a precision op amp with a laser-trimmed 6-kΩ/12-kΩ resistor network to achieve stable gain accuracy and high common-mode rejection across temperature. Its internal architecture supports two fixed gain modes - G = 1/2 (REF as reference, SENSE tied to OUT) and G = 2 (REF as positive input, SENSE as negative input) - with no external resistors required.

It features rail-to-rail output swing within 130–220 mV of rails, 18 V/μs slew rate, and robust capacitive load drive up to 500 pF. The input stage extends to the negative supply, enabling true single-supply operation with common-mode range down to (V−) − 0.1 V.

Key Specifications

Pinout & Package

INA597IDT is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with standard JEDEC MS-012AC footprint and 1.27-mm pitch. Pinout matches TI's D (SOIC-8) variant per datasheet Figure 6-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA592IDR, INA597IDT trades 100-μV offset for lower cost and broader supply flexibility; compared with INA137UA, it adds single-supply operation and lower power but sacrifices audio-grade distortion performance - making INA597IDT optimal for cost-sensitive, high-voltage industrial sensing where precision meets practicality.

Availability

INA597IDT is available at Aetrix Electronics and suitable for flow transmitter design, servo drive position feedback, optical module bias monitoring, and voltage conditioning modules requiring stable component supply across automotive, industrial automation, and test equipment programs.

Supply support for INA597IDT 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

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 50 years of innovation in precision signal chain components.

The INA597IDT belongs to TI's e-trim™ precision amplifier portfolio, engineered specifically for high-voltage industrial sensing applications where accuracy, temperature stability, and supply flexibility must coexist without external trimming or complex compensation.

FAQ

What gain configurations does the INA597IDT support, and how are they selected?

The INA597IDT supports two fixed gain configurations: G = 1/2 and G = 2. Gain selection is determined by external connections - G = 1/2 uses REF grounded and SENSE tied to OUT; G = 2 uses REF as the positive input and SENSE as the negative input. No external resistors are needed. This configuration method is explicitly defined in the INA597IDT datasheet Section 6 (Pin Configuration) and validated for the SOIC-8 (D) package used in INA597IDT.

Does the INA597IDT support true single-supply operation, and what is its input common-mode range?

Yes, the INA597IDT supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range extends to (V−) − 0.1 V, allowing measurement of signals referenced to ground or negative rails - critical for low-side current sensing. This specification is confirmed in Section 7.5 (Electrical Characteristics: G = 1/2) of the INA597IDT datasheet, with test conditions explicitly listing VCM min = 3[(V−) − 0.1] V.

What is the maximum capacitive load the INA597IDT can drive without instability?

According to the INA597IDT datasheet Section 1 (Features) and Figure 7-49/7-50 (Small-Signal Overshoot vs Capacitive Load), the device is specified to drive up to 500 pF while maintaining stability and ≤10% overshoot. This capability eliminates the need for external isolation resistors in typical ADC driver or cable-drive configurations - a key design advantage confirmed across both G = 1/2 and G = 2 modes.

How does the INA597IDT's offset voltage drift compare between G = 1/2 and G = 2 modes?

The INA597IDT exhibits ±5 μV/°C maximum drift in G = 1/2 mode and ±10 μV/°C maximum drift in G = 2 mode, as specified in Sections 7.5 and 7.6 of the datasheet. This doubling of drift in higher-gain mode reflects resistor network thermal coefficient interactions - a verified behavior documented in the "Input Offset Voltage Drift" test conditions table and confirmed in Figures 7-5 and 7-6 (Typical Distribution of Offset Voltage Drift).

Is the INA597IDT RoHS-compliant and qualified for automotive applications?

The INA597IDT is RoHS-compliant per TI's official product folder and meets JEDEC J-STD-020 moisture sensitivity level 3. While it is qualified for industrial temperature range (−40°C to +125°C), it is not AEC-Q200 qualified and lacks automotive-specific reliability testing or PPAP documentation. Therefore, INA597IDT is recommended for industrial and commercial applications, not safety-critical automotive ECUs - a distinction clearly stated in TI's SBOS385B datasheet revision history and packaging information.