Texas Instruments OPA353NA/3K

Overview

OPA353NA/3K from Texas Instruments (formerly Burr-Brown) is a single, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation at 2.7V–5.5V. It delivers 44MHz gain-bandwidth, 22V/µs slew rate, and 5nV/√Hz input voltage noise, enabling high-fidelity signal conditioning in space-constrained applications such as A/D converter driving and video line buffering.

For engineers reviewing the OPA353NA/3K datasheet, OPA353NA/3K pinout, OPA353NA/3K application, or OPA353NA/3K equivalent, key selection criteria include its rail-to-rail swing within 10mV of supply rails under 10kΩ load, ±0.5pA typical input bias current, unity-gain stability, and SOT-23-5 package compatibility with high-density PCB layouts.

Technical Context

The OPA353NA/3K employs a complementary N/P-channel input stage to achieve rail-to-rail common-mode input range extending 100mV beyond both supply rails, with a defined transition region near (V+) – 1.8V. Its class AB output stage enables rail-to-rail output swing-within 10mV of V+ and V− with 10kΩ load-and supports 75Ω video drive capability per datasheet Figure 6.

Designed on a 0.6µm CMOS process, it features 9pF total input capacitance (differential + common-mode), low 5.2mA quiescent current per amplifier, and guaranteed operation from –40°C to +85°C. The device remains stable driving capacitive loads up to 100pF in unity-gain configuration without external compensation.

Key Specifications

Pinout & Package

SOT-23-5 surface-mount package (DBV drawing), 5-pin, RoHS-compliant, moisture sensitivity level 2 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA353NA/3K, OPA353UA offers identical performance in a larger SO-8 package ideal for development, while TLV2462CDR trades speed and noise for lower cost in non-critical signal chains-neither is pin-compatible nor drop-in, requiring layout revision for substitution.

Availability

OPA353NA/3K is available at Aetrix Electronics and suitable for cell phone PA control loops, A/D converter driving, composite video line buffering, and portable audio signal conditioning requiring stable component supply across industrial temperature ranges.

Supply support for OPA353NA/3K 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 acquired Burr-Brown in 2000 and maintains its precision analog portfolio, emphasizing high-performance, low-power, and miniaturized signal-conditioning solutions.

The OPA353NA/3K belongs to TI's MicroAmplifier™ series, designed specifically for miniature, low-voltage, single-supply applications demanding rail-to-rail operation, high speed, and low noise-targeting portable instrumentation, communications, and consumer video.

FAQ

What is the maximum operating supply voltage for the OPA353NA/3K?

The OPA353NA/3K is fully specified from 2.7V to 5.5V, with absolute maximum rating of 5.5V. It can operate down to 2.5V, though some parameters are not guaranteed below 2.7V. Exceeding 5.5V risks permanent damage per Absolute Maximum Ratings table. Always use 0.01µF ceramic bypass capacitors on V+ and V− pins regardless of supply voltage.

Does the OPA353NA/3K require external compensation for unity-gain stability?

No, the OPA353NA/3K is internally compensated and unity-gain stable. It does not require external compensation components in G=1 configurations. However, for high-impedance feedback networks (e.g., RF > 100kΩ), adding a small feedback capacitor (CF) across RF-calculated as RF × CF = RIN × CIN (≈9pF)-improves settling time and reduces overshoot per Application Information section.

Can the OPA353NA/3K drive a 75Ω video load directly?

Yes, the OPA353NA/3K is explicitly characterized for 75Ω video drive in the Applications section and Figure 6. It achieves 0.17% differential gain and phase error with NTSC signals, meeting broadcast video standards. For optimal performance, use AC-coupled input with DC bias at ~1.7V above V− and ensure proper termination and layout to minimize reflections.

What is the input protection scheme on the OPA353NA/3K?

The OPA353NA/3K features diode-clamped inputs rated for signals up to (V−) – 0.3V and (V+) + 0.3V. Inputs exceeding this range by more than 300mV must be current-limited to ≤10mA using a series resistor (e.g., 5kΩ for ±5V overvoltage). This prevents latch-up or parametric shift. The device is ESD-sensitive (HBM >2kV), so handling precautions per datasheet Section "Electrostatic Discharge Sensitivity" are mandatory.

How does temperature affect the OPA353NA/3K's quiescent current?

Quiescent current for the OPA353NA/3K increases from ~5.2mA at +25°C to ~6.5mA at +125°C, per Typical Performance Curve "Quiescent Current and Short-Circuit Current vs Temperature". At –55°C, IQ drops to ~4.2mA. Designers must verify thermal dissipation in enclosed environments, especially in SOT-23-5 (θJA = 200°C/W), where 5.2mA at 3.3V yields ~17mW and ~3.4°C rise above ambient.