Texas Instruments OPA2343UA/2K5G4

Overview

OPA2343UA/2K5G4 from Texas Instruments is a dual rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.7V to 5.5V). It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, and 850µA per channel quiescent current, with output swing within 1mV of rails under 100kΩ load - ideal for driving sampling A/D converters in portable instrumentation.

For engineers reviewing the OPA2343UA/2K5G4 datasheet, OPA2343UA/2K5G4 pinout, OPA2343UA/2K5G4 application, or OPA2343UA/2K5G4 equivalent, key selection criteria include rail-to-rail I/O performance at 2.7V supply, low THD+N (0.0007% @ 1kHz), channel isolation in dual configuration, and SO-8 package compatibility with standard PCB footprints.

Technical Context

The OPA2343UA/2K5G4 uses a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 500mV beyond supply rails, paired with a class AB output stage delivering true rail-to-rail output swing. Its unity-gain stable architecture supports high-speed closed-loop configurations without external compensation.

Designed for single-supply systems, it maintains specified performance across –40°C to +85°C, with input bias current ≤10pA, open-loop gain ≥100dB (RL = 100kΩ), and channel separation >100dB at 1kHz - critical for precision signal conditioning where crosstalk must be minimized between dual channels.

Key Specifications

Pinout & Package

OPA2343UA/2K5G4 is packaged in an 8-pin SOIC (SO-8) surface-mount package with standard 1.27mm pitch and 5.0mm × 6.2mm body size, compatible with automated assembly and IPC-7351B footprint D_ SOIC08_N.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual rail-to-rail operational amplifier applications.

Compared with MCP6022-I/SN and AD8602ARZ, the OPA2343UA/2K5G4 uniquely balances rail-to-rail I/O at 2.7V, 5.5MHz bandwidth, and sub-1mA quiescent current - making it optimal for cost-sensitive, low-voltage portable data acquisition where dynamic range and power efficiency are co-primary constraints.

Availability

OPA2343UA/2K5G4 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and consumer audio interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2343UA/2K5G4 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 specializing in analog and embedded processing technologies, with decades of expertise in precision op amp design and manufacturing.

The OPA2343UA/2K5G4 belongs to TI's microAmplifier™ series, engineered specifically for miniature, low-cost, single-supply applications demanding rail-to-rail performance, low power, and high-speed signal conditioning.

FAQ

What supply voltage range is supported by the OPA2343UA/2K5G4?

The OPA2343UA/2K5G4 operates from 2.7V to 5.5V, with full specifications guaranteed from 2.7V to 5V. It functions down to 2.5V, though some parameters (e.g., output swing, CMRR) may degrade below 2.7V. The device is explicitly characterized for single-supply use, with rail-to-rail input extending 500mV beyond both V+ and V– rails.

Does the OPA2343UA/2K5G4 require external compensation for unity-gain stability?

No, the OPA2343UA/2K5G4 is internally compensated and unity-gain stable. It drives capacitive loads up to 1000pF in unity-gain configuration without oscillation. For loads exceeding this, a 10Ω–20Ω series resistor at the output improves phase margin without significantly affecting dc accuracy when load resistance exceeds 10kΩ.

What is the maximum output current capability of the OPA2343UA/2K5G4?

The OPA2343UA/2K5G4 provides ±50mA short-circuit output current per amplifier, with continuous safe operation into 2kΩ loads. Output voltage swing remains within 40mV of rails at ±40mA (2kΩ), supporting moderate drive requirements such as driving 600Ω audio lines or multiple ADC inputs via resistive fanout.

How does the OPA2343UA/2K5G4 achieve rail-to-rail input operation?

The OPA2343UA/2K5G4 uses a complementary CMOS input stage: parallel N-channel and P-channel differential pairs. The N-pair handles inputs near V+, the P-pair near V–, with a 400mV transition region where both operate. This architecture extends the common-mode range to –0.3V to V+ + 0.3V, enabling true rail-to-rail input at all supply voltages.

Is thermal shutdown protection integrated into the OPA2343UA/2K5G4?

No, the OPA2343UA/2K5G4 does not include thermal shutdown circuitry. Its absolute maximum junction temperature is 150°C, and thermal resistance θJA is 150°C/W for SO-8 packaging. Designers must ensure adequate PCB copper area and airflow to maintain junction temperature below 125°C under worst-case power dissipation (≈22mW per amplifier at 5.5V, 0.85mA).