Texas Instruments OPA2333AIDGKTG4

Overview

OPA2333AIDGKTG4 from Texas Instruments is a dual-channel, zero-drift, rail-to-rail input/output CMOS operational amplifier optimized for precision, low-power, single-supply operation. It delivers 10 μV maximum offset voltage, 0.05 μV/°C maximum drift, and 17 μA quiescent current per amplifier across 1.8 V to 5.5 V supply, enabling high-accuracy signal conditioning in battery-powered medical sensors and portable instrumentation.

For engineers reviewing the OPA2333AIDGKTG4 datasheet, OPA2333AIDGKTG4 pinout, OPA2333AIDGKTG4 application, or OPA2333AIDGKTG4 equivalent, key selection criteria include ultra-low dc error budgeting, thermal stability under ambient gradients, 0.1–10 Hz noise performance (1.1 μV_PP), and compatibility with 10 kΩ load driving while maintaining rail-to-rail swing within 50 mV of rails.

Technical Context

The OPA2333AIDGKTG4 employs a proprietary auto-calibration architecture that continuously corrects input offset every 8 μs using a time-continuous 350-kHz signal-path amplifier-eliminating 1/f flicker noise and aliasing. Its CMOS input stage provides 70 pA typical input bias current and supports common-mode voltage range extending 100 mV beyond both supply rails.

This dual op-amp integrates two independent, unity-gain stable amplifiers sharing a single 8-pin VSSOP (DGK) package. Each channel features matched dc specifications-including offset drift, PSRR (5 μV/V), and CMRR (130 dB)-enabling precise differential sensing without external trimming in transducer front-ends and weigh-scale bridges.

Key Specifications

Pinout & Package

OPA2333AIDGKTG4 is packaged in an 8-pin VSSOP (DGK) with exposed thermal pad on underside. This leaded, surface-mount package measures 3.0 mm × 3.0 mm and supports standard reflow assembly. The exposed pad improves thermal resistance (R_θJA = 180.3°C/W) and reduces junction temperature rise during sustained output loading.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2333AIDGKTG4, the SOIC-packaged OPA2333PDR offers better thermal dissipation but occupies 3× more board area, while the LTC2053 provides superior noise performance at the cost of single-channel operation and higher power-making OPA2333AIDGKTG4 optimal for compact, dual-channel, battery-sensitive precision systems.

Availability

OPA2333AIDGKTG4 is available at Aetrix Electronics and suitable for medical sensor front-ends, portable electronic scales, and battery-powered gas detectors requiring stable component supply across extended temperature ranges (–40°C to +125°C) and long product lifecycles.

Supply support for OPA2333AIDGKTG4 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, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The OPA2333AIDGKTG4 belongs to TI's Zero-Drift Operational Amplifier product line, engineered specifically for high-accuracy, low-power signal conditioning in resource-constrained environments where dc precision and thermal stability are non-negotiable.

FAQ

What is the maximum allowable supply voltage for OPA2333AIDGKTG4?

The absolute maximum supply voltage for OPA2333AIDGKTG4 is +7 V across V+ and V– terminals. However, the recommended operating range is strictly 1.8 V to 5.5 V. Exceeding 5.5 V risks permanent damage and invalidates parametric guarantees-even brief transients above this limit may degrade long-term offset stability. Always implement clamping or LDO regulation to maintain compliance with the 5.5 V upper bound specified in Section 6.1 of the SBOS351E datasheet.

Does OPA2333AIDGKTG4 require external capacitors for stability?

No, OPA2333AIDGKTG4 is unity-gain stable and does not require external compensation capacitors. Its internal architecture ensures phase margin >60° across all gains ≥1 with capacitive loads up to 100 pF. However, a 0.1-μF ceramic decoupling capacitor placed within 2 mm of each supply pin (V+ and V–) is mandatory to suppress high-frequency supply noise and prevent oscillation in noisy environments-this requirement is explicitly stated in Section 8.1 of the SBOS351E datasheet.

Can OPA2333AIDGKTG4 drive a 10-kΩ load rail-to-rail?

Yes, OPA2333AIDGKTG4 delivers rail-to-rail output swing into a 10-kΩ load, reaching within 50 mV of both V+ and V– rails at 25°C. This performance is guaranteed across the full –40°C to +125°C temperature range per Section 6.6 Electrical Characteristics. For loads <10 kΩ, output swing degrades predictably-e.g., 100 mV from rails at 2 kΩ-so verify voltage headroom margins in high-current configurations using Figure 6 (Output Voltage Swing vs Output Current) in the SBOS351E datasheet.

How does the auto-calibration circuit affect OPA2333AIDGKTG4's turn-on behavior?

Upon power-up, OPA2333AIDGKTG4 requires approximately 100 μs to achieve full offset accuracy (≤10 μV) as the auto-calibration circuit completes its initial convergence cycle. During this interval, output may exhibit transient settling; therefore, systems requiring immediate precision must implement a brief enable delay or blanking window. This timing is documented in Section 7.3.3 and confirmed by Figure 10 (Large-Signal Step Response) in SBOS351E, which shows stable response after 100 μs under +5 V supply conditions.

Is the exposed thermal pad on OPA2333AIDGKTG4's VSSOP package electrically connected?

No, the exposed thermal pad on the bottom of the OPA2333AIDGKTG4 VSSOP (DGK) package is not electrically connected to any internal node. Per Section 7.3.5 of SBOS351E, it may be soldered directly to a V– plane for enhanced thermal performance or left unconnected-no electrical shorting or biasing is required. TI recommends connecting it to V– to reduce R_θJA from 180.3°C/W to ~100°C/W in typical 2-layer PCB layouts, improving long-term reliability under sustained load.