Texas Instruments OPA2333AIDGKRG4

Overview

OPA2333AIDGKRG4 from Texas Instruments is a dual, zero-drift, rail-to-rail input/output CMOS operational amplifier optimized for precision low-voltage operation. It delivers 10 μV max offset voltage, 0.05 μV/°C max drift, 17 μA quiescent current per amplifier, and operates from 1.8 V to 5.5 V supply - enabling high-accuracy signal conditioning in battery-powered medical sensors and electronic scales.

For engineers reviewing the OPA2333AIDGKRG4 datasheet, OPA2333AIDGKRG4 pinout, OPA2333AIDGKRG4 application, or OPA2333AIDGKRG4 equivalent, key selection criteria include micro-power consumption at rail-to-rail performance, sub-μV/°C thermal stability, 0.1–10 Hz noise of 1.1 μV_PP, and compatibility with single-supply 1.8 V systems requiring <50 mV output swing to rails.

Technical Context

The OPA2333AIDGKRG4 employs a proprietary auto-calibration architecture that performs continuous zero-offset correction every 8 μs using a 350-kHz main amplifier path, eliminating 1/f flicker noise while maintaining unity-gain stability. Its input stage supports common-mode voltage from (V−) − 0.1 V to (V+) + 0.1 V, and its output drives within 50 mV of both rails under 10 kΩ load.

This dual-channel device integrates two independent amplifiers sharing only power rails; each channel features matched offset drift (<0.05 μV/°C), CMRR >106 dB over −40°C to 125°C, and PSRR >100 dB at DC - making it suitable for differential sensing where channel-to-channel tracking and rejection of supply noise are critical.

Key Specifications

Pinout & Package

OPA2333AIDGKRG4 is housed in an 8-pin VSSOP (DGK) package measuring 3.0 mm × 3.0 mm with 0.65 mm pitch. The exposed thermal pad on the underside is electrically isolated and may be connected to V− or left floating per TI design guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2333AIDGKRG4, the OPA2333PDR offers better thermal dissipation in larger packages but requires PCB redesign, while the LTC2053IMS8#PBF trades significant quiescent current for marginal drift improvement - making OPA2333AIDGKRG4 optimal for space- and energy-constrained precision analog front-ends.

Availability

OPA2333AIDGKRG4 is available at Aetrix Electronics and suitable for medical instrumentation, electronic scales, and battery-powered instruments requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OPA2333AIDGKRG4 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 specializing in analog and embedded processing technologies, with leadership in precision analog signal chains and power management ICs.

The OPA2333AIDGKRG4 belongs to TI's Zero-Drift Operational Amplifier product line, designed specifically for high-accuracy, low-power DC signal conditioning in resource-constrained environments such as portable medical devices and industrial sensors.

FAQ

What is the maximum operating temperature range for the OPA2333AIDGKRG4?

The OPA2333AIDGKRG4 is fully specified from −40°C to +125°C ambient temperature, with absolute maximum junction temperature rated at 150°C. This range is validated per TI's production test flow and supports deployment in under-hood automotive, industrial control, and medical equipment environments where thermal robustness is critical. The device maintains 10 μV offset and 0.05 μV/°C drift specifications across this full range.

Does the OPA2333AIDGKRG4 require external capacitors for stability?

No, the OPA2333AIDGKRG4 is unity-gain stable and does not require external compensation capacitors. However, TI recommends placing a 0.1 μF ceramic decoupling capacitor between V+ and V− pins, located within 2 mm of the package, to suppress high-frequency supply noise. This practice is essential for maintaining PSRR >100 dB and preventing oscillation in noisy PCB environments.

Can the OPA2333AIDGKRG4 drive capacitive loads directly?

The OPA2333AIDGKRG4 can drive up to 100 pF capacitive load while maintaining stability and monotonic step response, as verified in TI's SBOS351E datasheet Figure 15. For loads exceeding 100 pF, a series isolation resistor (typically 10–50 Ω) must be added between the output and the capacitor to prevent peaking or ringing - a requirement confirmed by small-signal overshoot testing at G = +1.

How does the auto-calibration architecture of the OPA2333AIDGKRG4 affect system noise?

The OPA2333AIDGKRG4's auto-calibration eliminates 1/f (flicker) noise entirely, resulting in flat voltage noise spectral density above ~0.1 Hz. This yields 1.1 μV_PP integrated noise from 0.1–10 Hz - a key enabler for high-resolution DC measurements. Unlike chopper-stabilized amplifiers with switching artifacts, this architecture introduces no spurs or aliasing, preserving signal integrity in precision data acquisition.

Is the exposed thermal pad on the OPA2333AIDGKRG4 package electrically connected?

No, the exposed thermal pad on the bottom of the OPA2333AIDGKRG4 (DGK package) is electrically isolated from all internal circuitry. TI's datasheet explicitly states it may be connected to V− for improved thermal performance or left unconnected - no internal short exists. PCB layout must avoid solder bridging to adjacent pins, and thermal vias should connect the pad only to a dedicated V− copper pour.