Texas Instruments OPA2341DGSA/250

Overview

OPA2341DGSA/250 from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier with independent shutdown control per channel, designed for low-voltage single-supply operation (2.7V to 5.5V). It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, and 750µA per-channel quiescent current, enabling high-fidelity signal conditioning in portable data acquisition systems.

For engineers reviewing the OPA2341DGSA/250 datasheet, OPA2341DGSA/250 pinout, OPA2341DGSA/250 application, or OPA2341DGSA/250 equivalent, this device supports precision sensor biasing, A/D converter driving, active filtering, and low-power test equipment where rail-to-rail swing, shutdown capability, and thermal stability across –55°C to +125°C are critical selection criteria.

Technical Context

The OPA2341DGSA/250 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 300mV beyond supply rails, and a class AB output stage delivering output swing within 1mV of rails under 100kΩ load. Its unity-gain stable architecture supports direct connection to sampling ADC inputs without external compensation.

Each amplifier features independent CMOS-compatible shutdown pins (SD A and SD B), enabling selective channel disablement with 1µs turn-off and 3µs turn-on times. Channel separation exceeds 140dB at DC and remains >100dB up to 10kHz, ensuring minimal crosstalk in dual-channel signal paths.

Key Specifications

Pinout & Package

OPA2341DGSA/250 is housed in a 10-pin MSOP (VSSOP-DGS) package, 3.0mm × 3.0mm footprint, 0.5mm pitch, optimized for space-constrained PCB layouts while maintaining thermal resistance of 150°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2333AIDGSR and MCP6V32-E/MS, the OPA2341DGSA/250 offers the best balance of speed (5.5MHz), power efficiency (750µA/channel active, 10nA shutdown), and dual-channel independence-making it optimal for portable data acquisition where both AC fidelity and battery life are critical.

Availability

OPA2341DGSA/250 is available at Aetrix Electronics and suitable for sensor biasing, data acquisition, and process control applications requiring stable component supply across industrial temperature ranges and long-term production continuity.

Supply support for OPA2341DGSA/250 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 OPA2341DGSA/250 belongs to TI's microAmplifier™ series, engineered specifically for low-cost, miniature, single-supply applications demanding rail-to-rail I/O, low quiescent current, and robust performance from –55°C to +125°C.

FAQ

What is the operating supply voltage range for the OPA2341DGSA/250?

The OPA2341DGSA/250 operates from a single supply of 2.7V to 5.5V, with functional operation down to 2.5V. Its rail-to-rail input stage accepts common-mode voltages from (V–) – 0.1V to (V+) + 0.1V, and the output swings to within 1mV of both rails under light loads-enabling full dynamic range utilization in 3.3V and 5V systems without dual supplies.

How does the shutdown feature work on the OPA2341DGSA/250?

The OPA2341DGSA/250 has two independent CMOS-compatible shutdown pins: SD A (Pin 9) and SD B (Pin 5). Driving either pin below (V–) + 0.8V disables its respective amplifier channel, reducing quiescent current to 10nA. Enabling requires a voltage above (V–) + 2V. Turn-off and turn-on times are 1µs and 3µs respectively-ideal for synchronizing with ADC sampling cycles to minimize system power.

Can the OPA2341DGSA/250 drive capacitive loads, and what is the recommended approach?

Yes, the OPA2341DGSA/250 can drive up to ~1000pF in unity-gain configuration without instability. For larger capacitive loads, TI recommends adding a 10Ω–20Ω series resistor between the output and load (Figure 4 in SBOS202A). This isolates the op amp's output impedance from the capacitance, suppressing ringing while introducing only minor DC error (e.g., 0.2% with 10kΩ parallel load and 20Ω series resistor).

What is the maximum junction temperature and thermal resistance of the OPA2341DGSA/250?

The OPA2341DGSA/250 has a maximum junction temperature of 150°C and a thermal resistance θ_JA of 150°C/W in its MSOP-10 (DGS) package. This allows continuous operation at full specification from –55°C to +125°C ambient, with derating required above 125°C ambient per standard thermal guidelines. The package's 3.0mm × 3.0mm footprint supports efficient PCB heat spreading.

Is the OPA2341DGSA/250 suitable for driving ADC inputs, and which parameters make it appropriate?

Yes, the OPA2341DGSA/250 is explicitly optimized for driving sampling ADCs such as the ADS7816. Key enablers include 5.5MHz GBW, 6V/µs slew rate, 1µs 0.1% settling time, rail-to-rail output swing (preserving ADC input range), and independent shutdown synchronized to ADC conversion cycles-reducing total system power during idle periods while maintaining signal integrity during active sampling.