Texas Instruments OPA234E

Overview

OPA234E from Texas Instruments is a dual, low-power, precision operational amplifier optimized for single-supply operation down to +2.7V, featuring 100µV max input offset voltage, 250µA/amp quiescent current, and rail-to-rail output swing within 50mV of ground. It serves as a signal-conditioning front-end in portable instrumentation and battery-powered sensor interfaces.

For engineers reviewing the OPA234E datasheet, OPA234E pinout, OPA234E application, or OPA234E equivalent, key selection criteria include its guaranteed ±100µV offset at +2.7V supply, 0.35MHz gain-bandwidth product with 1000pF capacitive load drive capability, and VSSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The OPA234E implements a bipolar-input, unity-gain-stable architecture with laser-trimmed input offset, enabling high DC accuracy without external trimming. Its input common-mode range extends 0.1V below V– and up to (V+) –1V, supporting true single-supply sensing across ground-referenced signals.

Each amplifier operates independently with >120dB CMRR and PSRR, and stable performance into 1000pF loads-critical for driving ADC input filters or long traces in industrial data acquisition systems.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) surface-mount package: 2.3mm × 2.0mm footprint, 0.5mm pitch, 1.0mm height-designed for high-density PCBs with thermal resistance θ_JA = 220°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA234E, OPA2333AIDR offers superior long-term stability but triples system power budget, while MCP6022-I/SN delivers 28× more bandwidth at the cost of 4× higher supply current-making OPA234E the optimal balance for low-power, medium-accuracy analog signal paths.

Availability

OPA234E is available at Aetrix Electronics and suitable for portable medical devices, industrial 4–20mA transmitters, and automotive cabin sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA234E 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 and embedded processing solutions with over 90 years of innovation in precision analog ICs.

The OPA234E belongs to TI's precision op amp portfolio designed specifically for low-power, single-supply signal conditioning in portable, industrial, and automotive applications where accuracy, size, and energy efficiency are jointly critical.

FAQ

What is the maximum operating temperature for the OPA234E?

The OPA234E is specified for continuous operation from –40°C to +125°C ambient temperature, with junction temperature rated up to 150°C. This makes it suitable for under-hood automotive applications and industrial control cabinets where thermal margins are tight. The device maintains its ±100µV offset and 250µA quiescent current specifications across this full range, as verified in TI's production testing at +125°C.

Does the OPA234E require external offset nulling components?

No, the OPA234E does not require external offset nulling components. Its input offset voltage is laser-trimmed at wafer level and guaranteed ≤±100µV at +2.7V supply-sufficient for most precision applications. While the VSSOP-8 package retains pins 1 and 5 for offset trim (inherited from the OPA234 single variant), these pins are unused in the OPA234E dual configuration and should be left unconnected.

Can the OPA234E drive a 1000pF capacitive load stably?

Yes, the OPA234E is explicitly characterized for stable operation with up to 1000pF capacitive loads at unity gain, as confirmed in the datasheet's "Capacitive Load Drive (Stable Operation)" specification. This eliminates the need for series isolation resistors when interfacing directly with ADC input capacitors or long PCB traces, preserving signal integrity without added phase shift or peaking.

What is the input common-mode voltage range of the OPA234E at +2.7V supply?

At +2.7V single supply, the OPA234E accepts input common-mode voltages from –0.1V to +1.7V (i.e., (V+) –1V). This allows direct connection to ground-referenced sensors and supports rail-to-rail input operation near the negative rail-an essential feature for single-supply systems measuring signals that dip below 0V relative to system ground.

Is the OPA234E RoHS compliant and lead-free?

Yes, the OPA234E is RoHS compliant and lead-free, manufactured under TI's "Green (RoHS & no Sb/Br)" eco plan. Its VSSOP-8 package uses CU NIPDAU lead finish and is rated MSL Level-3 (260°C peak reflow), meeting JEDEC J-STD-020 requirements. Full compliance documentation-including substance declarations and test reports-is available through TI's Quality & Environmental Information portal.