Texas Instruments OPA2343EA/250G4

Overview

OPA2343EA/250G4 from Texas Instruments is a dual rail-to-rail input/output CMOS operational amplifier in an 8-pin VSSOP package, specified for –40°C to +85°C operation. It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, 850µA per channel quiescent current, and 0.0007% THD+N at 1kHz - optimized for driving sampling A/D converters in low-voltage, single-supply systems.

For engineers reviewing the OPA2343EA/250G4 datasheet, OPA2343EA/250G4 pinout, OPA2343EA/250G4 application, or OPA2343EA/250G4 equivalent, key selection criteria include rail-to-rail swing with 1mV rail proximity under 100kΩ load, ±0.2pA typical input bias current, and verified stability driving up to 100pF capacitive loads in unity-gain configuration.

Technical Context

The OPA2343EA/250G4 employs complementary N- and P-channel input stages enabling rail-to-rail common-mode input range extending 500mV beyond supply rails. Its class AB output stage supports true rail-to-rail output swing - within 1mV of V+ and V– with light loads - while maintaining ≥100dB open-loop gain at 100kΩ load.

Designed for unity-gain stability, it achieves 1µs 0.1% settling time (2V step, CL = 100pF) and exhibits <0.2µs overload recovery. Channel separation exceeds 100dB at 1kHz, confirming fully independent dual-amplifier circuitry with minimal crosstalk in mixed-signal signal chains.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: ultra-miniature 3mm × 3mm body, 0.5mm pitch, exposed thermal pad, RoHS-compliant NiPdAu finish, MSL Level-2-260°C-1 year.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2343UA and MCP6022-E/SN, the OPA2343EA/250G4 provides optimal balance of miniature VSSOP-8 size, ultra-low input bias current, and proven 5.5MHz bandwidth - making it preferred for space- and power-constrained portable instrumentation where precision and layout density are co-priorities.

Availability

OPA2343EA/250G4 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and compact audio interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2343EA/250G4 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-amps and signal chain solutions.

The OPA2343EA/250G4 belongs to TI's microAmplifier™ series, designed specifically for miniature, low-voltage, single-supply applications demanding rail-to-rail performance, low distortion, and minimal quiescent power.

FAQ

What supply voltage range does the OPA2343EA/250G4 support?

The OPA2343EA/250G4 operates from a single supply of 2.5V to 5.5V, with full specifications guaranteed from 2.7V to 5V over –40°C to +85°C. This wide range allows direct interfacing with 3.3V and 5V logic domains, and compatibility with aging batteries or energy-harvesting sources down to 2.5V without performance degradation. The OPA2343EA/250G4 maintains rail-to-rail input/output functionality across this entire span.

Does the OPA2343EA/250G4 require external compensation for unity-gain stability?

No, the OPA2343EA/250G4 is internally compensated for unity-gain stability and drives up to 100pF capacitive loads without oscillation in G = 1 configuration. Stability is verified per typical performance curves in SBOS090A, including small-signal overshoot vs. load capacitance. For loads exceeding 100pF, a 10Ω–20Ω series resistor at the output restores phase margin without compromising DC accuracy in most applications. The OPA2343EA/250G4 datasheet confirms no external compensation network is needed.

What is the maximum output current capability of the OPA2343EA/250G4?

The OPA2343EA/250G4 delivers ±50mA short-circuit output current per channel, as specified in absolute maximum ratings. Under normal linear operation with 10kΩ load, output swing remains within 10mV of rails while sustaining ≥100dB open-loop gain. The device safely handles momentary overloads - e.g., ESD transients or capacitive charging spikes - without latch-up. Thermal shutdown is not implemented; safe operating area is defined by junction temperature limits (150°C) and package thermal resistance (150°C/W for VSSOP-8). The OPA2343EA/250G4 output stage is rated for continuous operation into 600Ω loads.

How does the rail-to-rail input stage of the OPA2343EA/250G4 function across the supply range?

The OPA2343EA/250G4 uses parallel N-channel and P-channel input differential pairs, enabling common-mode input voltage from (V–) – 0.3V to (V+) + 0.3V. Within the transition region near (V+) – 1.3V, both pairs conduct, causing minor degradation in PSRR, CMRR, and THD - documented in SBOS090A Figure 2. Outside this ~400mV zone, performance matches full-spec limits. Input protection diodes clamp signals exceeding rails by >500mV, requiring external current limiting to ≤10mA. The OPA2343EA/250G4 input stage thus supports true over-the-rail sensing while maintaining precision in standard operating ranges.

Is the OPA2343EA/250G4 suitable for driving 600Ω audio loads?

Yes, the OPA2343EA/250G4 class AB output stage is explicitly characterized to drive 600Ω loads connected anywhere between V+ and ground, as confirmed in the Applications Information section of SBOS090A. At 1kHz, THD+N remains ≤0.0007% into 600Ω with 3Vp-p output, and output swing stays within 40mV of rails. For sustained 600Ω operation, ensure PCB layout includes adequate copper pour on the thermal pad and limit ambient temperature to ≤70°C to maintain junction temperature below 125°C. The OPA2343EA/250G4 is validated for this use case in speech bandpass filter and line-driver reference designs.