Texas Instruments OPA334AIDBVT

Overview

OPA334AIDBVT from Texas Instruments is a single-channel, zero-drift CMOS operational amplifier in SOT-23-6 package with shutdown control, 5 µV max offset voltage, 0.05 µV/°C max drift, and 285 µA quiescent current-designed for precision transducer signal conditioning in battery-powered medical instrumentation and handheld test equipment.

For engineers reviewing the OPA334AIDBVT datasheet, OPA334AIDBVT pinout, OPA334AIDBVT application, or OPA334AIDBVT equivalent, key selection criteria include ultra-low offset drift over temperature, rail-to-rail output swing on +2.7V to +5.5V single supply, and sub-µV/°C thermal stability required in high-accuracy analog front-ends.

Technical Context

The OPA334AIDBVT implements auto-zeroing architecture with continuous-time 2 MHz main amplifier and 10 kHz correction cycle, achieving near-zero long-term offset drift while maintaining unity-gain stability and no phase reversal. Its input stage features CMOS topology with ±70 pA typical bias current and rail-to-rail common-mode range extending from (V–) – 0.1 V to (V+) – 1.5 V.

Shutdown functionality is implemented via a CMOS-enable pin referenced to V–, requiring >0.75×(V+ – V–) for activation and <0.8 V above V– for disable; transition times are 150 µs (enable) and 1 µs (disable), with output entering high-impedance state during shutdown.

Key Specifications

Pinout & Package

SOT-23-6 package (DBV), 2.9 mm × 1.6 mm × 1.3 mm body, JEDEC MO-178 compliant, surface-mount, moisture sensitivity level 2 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA335AIDBVT, OPA334AIDBVT adds shutdown control at cost of one extra pin and slightly higher package height; versus AD8628ARTZ-REEL7, it trades lower drift for 4.2× lower quiescent current-making it optimal for portable, battery-constrained precision sensing.

Availability

OPA334AIDBVT is available at Aetrix Electronics and suitable for transducer signal conditioning, temperature measurement, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for OPA334AIDBVT 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.

The OPA334 family belongs to TI's Zerø-Drift Series of precision op amps, engineered specifically for high-accuracy, low-power signal conditioning in medical, industrial, and portable measurement systems.

FAQ

What is the maximum operating temperature range for the OPA334AIDBVT?

The OPA334AIDBVT is specified for operation from –40°C to +125°C, with absolute maximum junction temperature rated at +150°C. This extended temperature range supports deployment in automotive under-hood modules, industrial PLC I/O cards, and outdoor environmental monitoring hardware where thermal robustness is critical. The device maintains its 5 µV max offset and 0.05 µV/°C max drift specifications across this full range.

Does the OPA334AIDBVT require external components for stable operation?

Yes-the OPA334AIDBVT requires a 0.1 µF ceramic capacitor placed as close as possible between the V+ and V– pins to ensure stability and minimize supply noise coupling. This is explicitly mandated in TI's layout guidelines. No additional compensation components are needed, as the device is unity-gain stable and internally compensated. Input protection resistors are recommended only if input voltages exceed supply rails by more than 0.5 V.

How does the enable pin on the OPA334AIDBVT function in split-supply configurations?

In split-supply operation, the enable pin of the OPA334AIDBVT is referenced to the V– pin-not ground-so logic signals must be referenced to the negative rail. A valid high is >0.75×(V+ – V–) above V–, and a valid low is <0.8 V above V–. Leaving the enable pin floating is prohibited; it must be actively driven or tied to a defined voltage. This ensures reliable entry/exit from shutdown mode regardless of supply topology.

Can the OPA334AIDBVT drive capacitive loads without oscillation?

The OPA334AIDBVT is not characterized for direct capacitive load drive beyond 300 pF without isolation. For loads >300 pF, TI recommends adding a series resistor (typically 10–100 Ω) between the output and the capacitor to maintain phase margin. Figure 5 in the SBOS245D datasheet shows stable small-signal response with CL = 50 pF; larger loads require external compensation or buffer staging to prevent peaking or ringing in step responses.

What is the output behavior of the OPA334AIDBVT during shutdown?

When the enable pin is driven low, the OPA334AIDBVT enters shutdown mode with 2 µA quiescent current and places its output in a high-impedance (Hi-Z) state-neither sourcing nor sinking current. This allows multiple OPA334AIDBVT outputs to share a common analog bus without contention. The output remains Hi-Z until the enable pin is returned high and the 150 µs enable time elapses, after which full precision performance resumes.