Texas Instruments OPA4323IDYYR

Overview

OPA4323IDYYR from Texas Instruments is a quad-channel, rail-to-rail input/output zero-crossover operational amplifier optimized for precision, high-speed signal conditioning in 1.7V–5.5V systems. It delivers 20MHz gain-bandwidth, 114dB typical CMRR, 33V/μs slew rate, and ±150µV typical input offset voltage - enabling accurate ADC driving and high-side current sensing in industrial motor control and ultrasonic transducer interfaces.

For engineers reviewing the OPA4323IDYYR datasheet, OPA4323IDYYR pinout, OPA4323IDYYR application, or OPA4323IDYYR equivalent, key selection considerations include its zero-crossover architecture for rail-to-rail linearity, 200ns 0.01% settling time at 2V step, 5.5nV/√Hz noise at 10kHz, ±110mA output drive at 5.5V, and operation across –40°C to 125°C.

Technical Context

The OPA4323IDYYR implements a zero-crossover input stage that eliminates crossover distortion across the full input common-mode range (V– – 0.2V to V+ + 0.15V), ensuring consistent precision in both low- and high-side sensing configurations. Its unity-gain stable architecture supports direct connection to capacitive loads up to 150pF without sustained oscillation.

Designed for low-voltage, high-fidelity signal chains, it maintains 100dB minimum CMRR over temperature and supply voltage, achieves 20MHz GBW with 50° phase margin at 1.8V, and integrates internal RFI/EMI filtering on input pins to suppress 1.8GHz interference (62dB EMIRR).

Key Specifications

Pinout & Package

The OPA4323IDYYR is housed in a 14-pin SOT-23-THIN (DYY) package measuring 4.2mm × 3.26mm, optimized for high-density PCB layouts while maintaining thermal performance (R_θJA = 113.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4323IDYYR, the OPA4197IPWR trades bandwidth and slew for superior DC accuracy, while the LMV881QDGKRQ1 offers automotive qualification at reduced speed and noise performance - making OPA4323IDYYR optimal for high-fidelity, high-speed industrial signal chains where zero-crossover linearity and EMI resilience are essential.

Availability

OPA4323IDYYR is available at Aetrix Electronics and suitable for industrial motor control, precision data acquisition, and ultrasonic sensing applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for OPA4323IDYYR 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 expertise in precision op amps and signal chain solutions.

The OPAx323 family was engineered specifically for high-speed, low-voltage precision applications - combining zero-crossover architecture, rail-to-rail operation, and robust EMI immunity to address demanding ADC driver, current sensing, and sensor interface requirements.

FAQ

What is the maximum capacitive load the OPA4323IDYYR can drive without instability?

The OPA4323IDYYR is designed to drive up to 150pF capacitive loads without sustained oscillations, as verified under unity-gain conditions with 10kΩ load. For loads exceeding 150pF, external isolation resistance (e.g., 10–50Ω series resistor) is recommended to maintain phase margin above 50° and prevent peaking or ringing in the OPA4323IDYYR output response.

Does the OPA4323IDYYR support true single-supply operation down to 1.7V?

Yes, the OPA4323IDYYR operates from 1.7V to 5.5V total supply voltage, with rail-to-rail input and output stages functional across this entire range. At 1.7V, it maintains 103dB typical CMRR, 150ns 0.1% settling time, and 1.9mA typical quiescent current per channel - enabling battery-powered portable instrumentation and wearables.

How does the zero-crossover architecture of the OPA4323IDYYR improve performance versus conventional rail-to-rail op amps?

The zero-crossover architecture in the OPA4323IDYYR eliminates the distortion spike that occurs when input signals cross 0V in standard rail-to-rail input stages. This results in <0.00125% THD+N at 10kHz and preserves signal fidelity in encoder sine/cosine decoding, audio pre-amplification, and high-resolution ADC driving - where conventional op amps exhibit measurable crossover nonlinearity.

What is the thermal resistance (R_θJA) of the OPA4323IDYYR in its DYY package?

The OPA4323IDYYR in the 14-pin SOT-23-THIN (DYY) package has a junction-to-ambient thermal resistance (R_θJA) of 113.7°C/W, measured per JEDEC JESD51-2 standards. This value assumes standard 2-layer PCB layout with 1in² copper pour; adding thermal vias to inner ground planes reduces effective R_θJA by up to 25% in production designs.

Is the OPA4323IDYYR pin-compatible with other devices in the OPAx323 family?

No - the OPA4323IDYYR uses a 14-pin DYY package with dedicated pins for four independent amplifier channels (no shutdown function), whereas the OPA4323S variants use 16-pin WQFN packages with dual shutdown controls (SHDN12/SHDN34). Pinouts differ across SOIC (D), TSSOP (PW), and DYY variants; board layout must match the specific package selected.