Texas Instruments OPA2344PA

Overview

OPA2344PA from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier optimized for precision, low-power, single-supply operation (2.7V–5.5V). It delivers 1MHz gain-bandwidth, 0.8V/µs slew rate, ±1mV max input offset voltage, 150µA typical quiescent current per amplifier, and output swing within 1mV of rails under light load - enabling high-dynamic-range signal conditioning in space-constrained data acquisition and audio systems.

For engineers reviewing the OPA2344PA datasheet, OPA2344PA pinout, OPA2344PA application, or OPA2344PA equivalent, key selection considerations include its unity-gain stability, rail-to-rail performance at low supply voltages, ultra-low power consumption, dual-channel integration in PDIP-8, and suitability for driving SAR ADC inputs with minimal settling error and charge injection.

Technical Context

The OPA2344PA employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 300mV beyond both supply rails, and a class AB output stage delivering rail-to-rail output swing. Its unity-gain stable architecture supports direct use in buffers and gain-of-one configurations without external compensation.

Designed for single-supply operation from 2.7V to 5.5V, it maintains full rail-to-rail functionality across –40°C to +85°C, with input bias current ≤10pA, open-loop gain ≥104dB, and THD+N of 0.006% at 1kHz - making it suitable for precision analog front-ends where DC accuracy and low-noise AC performance coexist under tight power budgets.

Key Specifications

Pinout & Package

OPA2344PA is housed in an 8-pin plastic dual in-line package (PDIP-8), through-hole mountable, with industry-standard pinout compatible with legacy SOIC-8 footprints (pin-for-pin with SOIC variant for layout reuse where mechanical constraints allow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2344UA and MCP6022-I/P, the OPA2344PA uniquely balances ultra-low power (150µA), guaranteed unity-gain stability, rail-to-rail I/O, and through-hole accessibility - making it the optimal choice for low-volume industrial prototypes, educational labs, and cost-sensitive DIP-based control modules where thermal and layout flexibility outweigh SMT density gains.

Availability

OPA2344PA is available at Aetrix Electronics and suitable for PCMCIA data acquisition, speech-band audio processing, process control sensor interfaces, and active filter design requiring stable component supply, long-term obsolescence management, and RoHS-compliant through-hole packaging.

Supply support for OPA2344PA 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 over 50 years of innovation in precision amplifiers, data converters, and power management ICs.

The OPA2344PA belongs to TI's MicroAmplifier™ series - designed specifically for miniature, low-power, single-supply applications demanding rail-to-rail performance, high DC precision, and robust AC fidelity in space- and energy-constrained systems.

FAQ

What supply voltage range does the OPA2344PA support?

The OPA2344PA operates from a single supply of 2.7V to 5.5V, with full rail-to-rail input and output functionality specified across this range. It remains functional down to 2.5V, though some parameters like open-loop gain and output swing degrade slightly below 2.7V. The absolute maximum supply is 7.5V, but operation beyond 5.5V voids guaranteed specifications and risks reliability.

Is the OPA2344PA unity-gain stable?

Yes, the OPA2344PA is explicitly unity-gain stable and requires no external compensation. This is confirmed in the official TI SBOS107A datasheet, which states "OPA344 series op amps are unity gain stable" - and OPA2344PA is the dual-channel member of the OPA344 family. It can be used reliably in voltage-follower, non-inverting gain-of-one, and inverting gain-of-one configurations without oscillation.

What is the maximum output current capability of the OPA2344PA?

The OPA2344PA provides ±15mA short-circuit output current per amplifier, as specified in the Absolute Maximum Ratings table. Under normal linear operation into resistive loads, it delivers ±10mA while maintaining rail-to-rail swing and low distortion. For sustained output currents above ±5mA, thermal derating must be considered due to its PDIP-8 θJA of 100°C/W.

Can the OPA2344PA drive capacitive loads directly?

The OPA2344PA can directly drive up to 250pF of pure capacitive load in unity-gain configuration while maintaining stability, per TI's application note guidance. For larger capacitive loads (e.g., ADC input capacitance plus PCB trace), a small series resistor (10Ω–20Ω) between the output and load is recommended to suppress ringing without degrading DC accuracy - a technique validated in Figure 5 of the SBOS107A datasheet.

Does the OPA2344PA have ESD protection, and what is its rating?

Yes, the OPA2344PA includes integrated ESD protection diodes on all pins. Its Human Body Model (HBM) ESD tolerance is rated at 4000V, as documented in the Absolute Maximum Ratings section of the SBOS107A datasheet. Proper handling - including grounded workstations and anti-static packaging - is still required to prevent latent damage, especially given its precision CMOS input stage.