Texas Instruments OPA2373AIDRCR

Overview

OPA2373AIDRCR from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, battery-operated systems. It delivers 6.5 MHz gain-bandwidth, 5 V/µs slew rate, and 585 µA quiescent current per channel while operating from 2.3 V to 5.5 V single supply - enabling high-precision signal conditioning in portable medical sensors and handheld test equipment.

For engineers reviewing the OPA2373AIDRCR datasheet, OPA2373AIDRCR pinout, OPA2373AIDRCR application, or OPA2373AIDRCR equivalent, key selection criteria include its shutdown-enabled dual architecture, 10 pA max input bias current, rail-to-rail operation down to 2.3 V, and guaranteed performance across –40°C to +125°C industrial temperature range.

Technical Context

The OPA2373AIDRCR implements a complementary input stage (N- and P-channel differential pairs) enabling rail-to-rail input common-mode range extending 200 mV beyond both supply rails. Its class AB output stage supports rail-to-rail swing within 18 mV of rails under light loads (100 kΩ), with output drive capability maintained up to 5 kΩ.

Each channel features independent logic-controlled shutdown (Enable A/B pins), reducing quiescent current to <1 µA per amplifier. The device uses a unity-gain-stable architecture and achieves 94 dB open-loop gain at 25°C with 70–90 dB CMRR over full temperature range.

Key Specifications

Pinout & Package

OPA2373AIDRCR is housed in a 10-pin VSSOP (DRC) package measuring 3.0 mm × 3.0 mm with exposed thermal pad on underside, requiring connection to V– for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2373AIDRCR, OPA2374AIDRCR removes shutdown capability but simplifies control logic, while MCP6V82-E/MS trades bandwidth and power efficiency for ultra-low offset - making OPA2373AIDRCR optimal for battery-constrained, wideband, dual-channel signal chains needing selective power gating.

Availability

OPA2373AIDRCR is available at Aetrix Electronics and suitable for portable medical devices, battery-powered environmental sensors, and industrial temperature transmitters requiring stable component supply with extended temperature qualification.

Supply support for OPA2373AIDRCR 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 company specializing in analog and embedded processing technologies, with leadership in precision op-amps, data converters, and power management ICs.

The OPAx373 family was designed specifically for low-power, rail-to-rail signal conditioning in portable and industrial systems where supply headroom is limited and thermal constraints are stringent.

FAQ

What is the maximum capacitive load the OPA2373AIDRCR can drive stably in unity-gain configuration?

The OPA2373AIDRCR supports stable unity-gain operation with up to 250 pF pure capacitive load. For loads exceeding this, adding a 10–20 Ω series resistor between the output and capacitive node restores phase margin. This behavior is confirmed in Figure 17 of the SBOS279F datasheet and applies directly to the OPA2373AIDRCR in its 10-pin VSSOP package.

Does the OPA2373AIDRCR require external pull-up or pull-down resistors on its Enable pins?

No - the Enable A and Enable B inputs of the OPA2373AIDRCR have internal logic thresholds: amplifier activates when voltage exceeds (V–) + 2 V, and shuts down below (V–) + 0.8 V. No external biasing is needed; direct connection to MCU GPIO suffices. Input bias current is only 0.2 µA, minimizing drive requirements for the OPA2373AIDRCR.

Can the OPA2373AIDRCR operate from a 2.3 V supply while maintaining full rail-to-rail input and output swing?

Yes - the OPA2373AIDRCR is fully specified from 2.3 V to 5.5 V. At 2.3 V, input common-mode range remains (V–) – 0.2 V to (V+) + 0.2 V, and output swing stays within 25 mV of rails at 100 kΩ load per the Electrical Characteristics table. This capability is validated across –40°C to +125°C and is intrinsic to the OPA2373AIDRCR design.

How does the OPA2373AIDRCR handle input voltages exceeding the supply rails?

The OPA2373AIDRCR input stage tolerates voltages up to 0.5 V beyond either rail without damage. Inputs exceeding the common-mode range (but within absolute max) do not cause phase inversion - a key differentiator confirmed in Figure 22 of the datasheet. However, input current must be limited to ≤10 mA using a series resistor if exceeding rails, which applies equally to all OPA2373AIDRCR units.

Is the thermal pad on the OPA2373AIDRCR's VSSOP package electrically connected, and how should it be handled?

Yes - the exposed thermal pad on the OPA2373AIDRCR (DRC package) is internally connected to V–. It must be soldered to a PCB copper pour tied to the V– net for thermal and electrical integrity. Leaving it floating degrades thermal resistance (RθJB increases from 30.6°C/W to >100°C/W), risking premature thermal shutdown or parametric shift in the OPA2373AIDRCR.