Texas Instruments OPA4170AIPWR

Overview

OPA4170AIPWR from Texas Instruments is a quad-channel, rail-to-rail output, low-noise (19 nV/√Hz), low-power (110 µA per amplifier) operational amplifier optimized for precision signal conditioning in single-supply systems operating from 2.7 V to 36 V. It features input voltage range extending to both rails, 1.2 MHz gain bandwidth, and 120 dB common-mode rejection - deployed in transducer amplification, bridge sensor interfaces, and battery-powered instrumentation.

For engineers reviewing the OPA4170AIPWR datasheet, OPA4170AIPWR pinout, OPA4170AIPWR application, or OPA4170AIPWR equivalent, key selection criteria include its rail-to-rail output swing (within 115 mV of V+ at 1 mA source), ±15 pA max input bias current, –40°C to +125°C operating range, and SOIC-14 package compatibility with space-constrained industrial sensing nodes.

Technical Context

The OPA4170AIPWR employs a CMOS input stage enabling ultra-low input bias current (±15 pA max) and rail-to-rail input operation down to V– – 0.1 V and within 2 V of V+. Its internal phase-reversal protection prevents output inversion when inputs exceed common-mode limits - critical for noninverting configurations in unregulated power modules.

Stable with capacitive loads up to 300 pF and specified across full temperature and supply ranges (2.7 V–36 V, –40°C to +125°C), it delivers consistent 1.2 MHz GBP and 0.4 V/µs slew rate without external compensation, supporting precision integrators and strain gauge amplifiers requiring low drift (±2 µV max offset, ±2 µV/°C max dVOS/dT).

Key Specifications

Pinout & Package

OPA4170AIPWR is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 3.91 mm, with standard 1.27 mm pitch and exposed pad not present. Thermal resistance RθJA is 93.2°C/W, supporting continuous operation at ambient temperatures up to +85°C with minimal heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4170AIPWR, OPA4182AIPWR trades 4× higher quiescent current for 10× better offset voltage and 8× higher bandwidth - ideal for high-resolution data acquisition. LM324DR offers broader legacy support but sacrifices 100× higher input bias current and no phase-reversal protection, limiting reliability in noisy industrial environments.

Availability

OPA4170AIPWR is available at Aetrix Electronics and suitable for transducer amplification, bridge sensor interfaces, and battery-powered instrumentation requiring stable component supply across extended temperature and voltage ranges.

Supply support for OPA4170AIPWR 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 for industrial, automotive, and personal electronics markets.

The OPAx170 series was designed as a value-line precision op amp family targeting cost-sensitive industrial sensing and power module applications where rail-to-rail operation, low power, and robust ESD/overstress performance are essential.

FAQ

What is the maximum capacitive load the OPA4170AIPWR can drive while remaining stable?

The OPA4170AIPWR is stable with capacitive loads up to 300 pF without requiring external isolation resistors. This specification is verified across the full operating temperature range (–40°C to +125°C) and supply voltage range (2.7 V to 36 V). Stability is maintained even when driving typical ADC input capacitances (e.g., 10–20 pF) or longer PCB traces, making OPA4170AIPWR suitable for direct connection to SAR and sigma-delta converters without added components.

Does the OPA4170AIPWR support true rail-to-rail input operation?

The OPA4170AIPWR supports input common-mode voltage from V– – 0.1 V to V+ – 2 V for normal operation. It can tolerate inputs up to V+ (i.e., 100 mV beyond V+) but with reduced performance within 2 V of V+. This extended input range enables direct interfacing with grounded sensors and single-supply reference buffers - a key capability confirmed in the device's Electrical Characteristics table and Typical Characteristics (Figure 4).

What is the guaranteed input offset voltage specification for OPA4170AIPWR over temperature?

The OPA4170AIPWR guarantees ±2 mV maximum input offset voltage across the full operating temperature range of –40°C to +125°C. At room temperature (25°C), the typical offset is ±0.25 mV with a maximum of ±1.8 mV. This tight specification ensures minimal DC error in precision gain stages used in industrial process control and medical instrumentation where calibration intervals must be extended.

Can OPA4170AIPWR operate from a 3.3-V single supply?

Yes, OPA4170AIPWR is fully specified and functional from 2.7 V to 36 V single supply. At 3.3 V, it maintains rail-to-rail output swing (within 115 mV of V+ at 1 mA), 1.2 MHz gain bandwidth, and 110 µA per amplifier quiescent current. Its input common-mode range extends from –0.1 V to 1.3 V, allowing direct connection to 3.3 V microcontroller ADC references and I²C-compatible sensors without level-shifting circuitry.

How does the phase-reversal protection in OPA4170AIPWR improve system reliability?

The OPA4170AIPWR incorporates internal phase-reversal protection that prevents output inversion when input voltages exceed the linear common-mode range - a failure mode common in noninverting configurations during power-up transients or ESD events. Instead of reversing polarity, the output saturates predictably toward the appropriate rail. This behavior, validated in Figure 25 of the datasheet, avoids catastrophic feedback loop errors in motor control, power supply regulation, and closed-loop sensor systems.