Texas Instruments OPA2170AIDCUT

Overview

OPA2170AIDCUT from Texas Instruments is a dual-channel, 36-V, rail-to-rail output operational amplifier in an 8-pin VSSOP (micro size) package. It delivers 1.2 MHz gain bandwidth, 19 nV/√Hz input voltage noise at 1 kHz, 110 µA per amplifier quiescent current, ±15 pA max input bias current, and operates from 2.7 V to 36 V single supply - enabling precision signal conditioning in battery-powered instrumentation and industrial sensor interfaces.

For engineers reviewing the OPA2170AIDCUT datasheet, OPA2170AIDCUT pinout, OPA2170AIDCUT application, or OPA2170AIDCUT equivalent, this page provides verified specifications, validated pin functions for the DCU package, real-world use cases in transducer and bridge amplification, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The OPA2170AIDCUT employs a CMOS input stage with RFI-filtered inputs and phase-reversal protection, allowing input signals to extend 100 mV below V– and within 2 V of V+ without output inversion. Its open-loop gain exceeds 110 dB across –40°C to +125°C, and common-mode rejection reaches 120 dB at ±18 V supply.

Stable with capacitive loads up to 300 pF, the device supports unity-gain configurations without external compensation. The dual-channel architecture shares identical electrical specs across channels, enabling matched performance in differential or dual-signal paths without inter-channel drift mismatch.

Key Specifications

Pinout & Package

OPA2170AIDCUT is packaged in an 8-pin VSSOP (micro size) with body dimensions 2.30 mm × 2.00 mm and 0.5-mm lead pitch. This ultra-compact footprint reduces PCB area by >40% versus standard VSSOP while maintaining thermal performance (R_θJA = 175.2°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel precision op amp applications.

Compared with OPA2170AIDCUT, OPA2182AIDR trades 3.8× higher quiescent current for 4.8× higher bandwidth and 10× lower offset, while TLV9062IDR offers 8.3× higher bandwidth at lower cost but lacks phase-reversal protection and has inferior noise performance in µV-range measurements.

Availability

OPA2170AIDCUT is available at Aetrix Electronics and suitable for transducer amplification, bridge sensing, temperature measurement, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2170AIDCUT 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of op amp design leadership.

The OPAx170 series was engineered as a value-line precision op amp family targeting cost-sensitive industrial and instrumentation applications where 36-V operation, rail-to-rail output, and low power must coexist without sacrificing key dc accuracy metrics.

FAQ

What is the maximum capacitive load the OPA2170AIDCUT can drive without instability?

The OPA2170AIDCUT is specified stable with capacitive loads up to 300 pF in unity-gain configuration, as verified in the datasheet's Typical Characteristics (Figure 23–24). For loads exceeding 300 pF, a series resistor (typically 10–50 Ω) between the output and capacitive node is required to maintain phase margin. This capability eliminates need for external isolation resistors in many sensor interface applications using long cables or ADC input capacitance.

Does the OPA2170AIDCUT support rail-to-rail input operation?

The OPA2170AIDCUT supports rail-to-rail *output*, but its input common-mode range extends only to (V–) – 0.1 V and (V+) – 2 V under normal operation. While it can tolerate inputs up to V+ (with reduced performance), true rail-to-rail input is not supported. This design enables robust operation with grounded-sensor topologies while avoiding the trade-offs of full RRIO architectures like higher IB or lower PSRR.

What is the thermal resistance (RθJA) of the OPA2170AIDCUT in its DCU package?

The OPA2170AIDCUT in the DCU (VSSOP micro size) package has a junction-to-ambient thermal resistance (RθJA) of 175.2°C/W, as specified in Section 7.5 of the SBOS557E datasheet. This value assumes JEDEC-standard PCB mounting with 1-in² 2-oz copper pad. Actual board-level RθJA will improve with enhanced copper pour and thermal vias beneath the exposed pad region.

Can the OPA2170AIDCUT operate from a single 3.3-V supply?

Yes, the OPA2170AIDCUT is fully specified from 2.7 V to 36 V single supply, including all key parameters (offset, noise, GBW, CMRR) across that range. At 3.3 V, it maintains 1.2 MHz GBP, 19 nV/√Hz noise, and rail-to-rail output swing within 35 mV of each rail - making it suitable for low-voltage IoT sensor nodes powered by 3.3-V LDOs or buck converters.

How does the phase-reversal protection in the OPA2170AIDCUT improve system reliability?

The OPA2170AIDCUT's internal phase-reversal protection prevents output polarity inversion when input voltages exceed the linear common-mode range - a failure mode that can cause uncontrolled actuator motion or false alarms in safety-critical monitoring systems. Instead of reversing, the output saturates predictably at the appropriate rail, enabling deterministic fault handling in industrial control loops using OPA2170AIDCUT.