Texas Instruments OPA4322AQPWRQ1

Overview

OPA4322AQPWRQ1 from Texas Instruments is a quad-channel, automotive-grade CMOS operational amplifier optimized for low-noise, rail-to-rail input/output signal conditioning in 1.8–5.5 V single-supply systems. It delivers 20 MHz gain bandwidth, 8.5 nV/√Hz input voltage noise at 1 kHz, 10 V/μs slew rate, and 1.4 mA per channel quiescent current - enabling high-fidelity sensor amplification and audio front-end design in space-constrained automotive ECUs.

For engineers reviewing the OPA4322AQPWRQ1 datasheet, OPA4322AQPWRQ1 pinout, OPA4322AQPWRQ1 application, or OPA4322AQPWRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), zero-crossover RRI/O architecture eliminating distortion near rails, low THD+N (0.0005% at 10 kHz), and TSSOP-14 package compatibility with high-density PCB layouts.

Technical Context

The OPA4322AQPWRQ1 employs a zero-crossover rail-to-rail input stage that eliminates crossover distortion across the full common-mode range (V– – 0.1 V to V+ + 0.1 V), ensuring linearity in precision DC-coupled paths. Its CMOS input architecture delivers ultra-low input bias current (±400 pA max over –40°C to +125°C) and high open-loop gain (100–130 dB), supporting stable closed-loop operation with gains ≥1.

This quad op amp is unity-gain stable into 50 pF capacitive loads and features fast overload recovery (100 ns), making it suitable for driving ADC inputs and multi-pole active filters. Its 20 MHz GBP and 10 V/μs slew rate support wideband applications up to ~1 MHz with <0.1% settling error.

Key Specifications

Pinout & Package

The OPA4322AQPWRQ1 is housed in a 14-pin TSSOP (PW) package measuring 5.00 mm × 4.40 mm, optimized for automated assembly and thermal performance (R_θJA = 109.8°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV434QDGKRQ1 and TSV914IQDT, the OPA4322AQPWRQ1 provides superior bandwidth-noise trade-off (20 MHz / 8.5 nV/√Hz), guaranteed AEC-Q100 Grade 1 operation, and zero-crossover linearity - making it the preferred choice for high-fidelity automotive sensor and audio signal paths where accuracy and reliability are non-negotiable.

Availability

OPA4322AQPWRQ1 is available at Aetrix Electronics and suitable for automotive cabin pressure sensing, ADAS camera signal conditioning, electric power steering torque monitoring, and infotainment audio preamplification requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA4322AQPWRQ1 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 specializing in analog and embedded processing technologies, with decades of automotive IC development experience and rigorous AEC-Q100 validation infrastructure.

The OPAx322-Q1 product line was designed specifically for high-accuracy, low-noise signal conditioning in automotive electronics - targeting sensor interfaces, ADAS front-ends, and infotainment audio systems operating from 1.8 V to 5.5 V single supplies.

FAQ

What is the maximum operating temperature range for the OPA4322AQPWRQ1?

The OPA4322AQPWRQ1 is qualified per AEC-Q100 Grade 1, with a specified ambient operating temperature range of –40°C to +125°C. This rating is validated across all electrical parameters in the datasheet, including offset voltage drift, gain bandwidth, and quiescent current, ensuring reliable operation in under-hood and transmission control module environments. The device's thermal metrics (R_θJA = 109.8°C/W) support this rating in typical PCB layouts with 2 oz copper and thermal vias.

Does the OPA4322AQPWRQ1 support true rail-to-rail input and output operation?

Yes, the OPA4322AQPWRQ1 features a zero-crossover rail-to-rail input stage that operates from V– – 0.1 V to V+ + 0.1 V, and rail-to-rail output swing within 10–20 mV of both supply rails (at 10 kΩ load). This architecture eliminates crossover distortion across the entire common-mode range, enabling accurate amplification of signals near the supply rails - a critical capability for 1.8 V single-supply systems where headroom is severely limited.

What is the typical quiescent current per channel for the OPA4322AQPWRQ1 at 5.5 V supply?

The typical quiescent current per channel for the OPA4322AQPWRQ1 is 1.4 mA at V_S = 5.5 V and T_A = 25°C, rising to 1.75 mA maximum over the full –40°C to +125°C temperature range. This low power consumption enables integration of four independent amplifiers in thermally constrained automotive modules without exceeding thermal limits in the 14-pin TSSOP package.

Is the OPA4322AQPWRQ1 unity-gain stable, and what capacitive load can it drive?

Yes, the OPA4322AQPWRQ1 is unity-gain stable and characterized to drive up to 50 pF capacitive loads without oscillation or excessive overshoot. This capability allows direct connection to ADC inputs, coaxial cables, or capacitive sensors without external compensation networks - simplifying schematic design and PCB layout while maintaining stability across temperature and process variations.

How does the OPA4322AQPWRQ1 achieve low THD+N in audio applications?

The OPA4322AQPWRQ1 achieves 0.0005% THD+N at 10 kHz (4 V_PP, 10 kΩ load) through its combination of high open-loop gain (100–130 dB), low output impedance (<90 Ω), zero-crossover input stage, and optimized CMOS output stage. These features minimize harmonic generation and intermodulation distortion, especially in single-supply audio preamps where rail proximity would otherwise cause clipping and crossover artifacts.