Texas Instruments OPA2373AIDGSR

Overview

OPA2373AIDGSR from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier with shutdown control, designed for low-power, precision signal conditioning in space-constrained systems. It delivers 6.5 MHz gain-bandwidth, 5 V/µs slew rate, 585 µA quiescent current per channel, and operates from 2.3 V to 5.5 V single supply - enabling high-fidelity analog front-ends in battery-powered instrumentation and portable medical sensors.

For engineers reviewing the OPA2373AIDGSR datasheet, OPA2373AIDGSR pinout, OPA2373AIDGSR application, or OPA2373AIDGSR equivalent, key selection criteria include its dual-channel shutdown capability, 10 pA max input bias current, rail-to-rail I/O swing within 25 mV of rails, operation up to 125°C, and compatibility with 10-pin VSON (DGS) packaging for high-density PCB layouts.

Technical Context

The OPA2373AIDGSR implements a complementary differential input stage enabling rail-to-rail common-mode range extending 200 mV beyond both supply rails, with a 500-mV transition region where both N- and P-channel pairs are active. Its class AB output stage supports rail-to-rail output swing down to 18 mV from rails under light loads (100 kΩ).

Each channel features independent digital enable logic (Enable A/B pins), allowing selective shutdown with <1 µA per-channel standby current. The device maintains unity-gain stability while driving capacitive loads up to 250 pF in G = +1 configuration, supported by internal compensation optimized for low-voltage, low-noise operation.

Key Specifications

Pinout & Package

OPA2373AIDGSR is packaged in a 10-pin VSON (DGS) package with 3.0 mm × 3.0 mm body size and exposed thermal pad on underside, requiring connection to V– for optimal thermal performance and EMI suppression.

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 OPA2374AIDR and MCP6022-E/SN, the OPA2373AIDGSR uniquely combines dual-channel shutdown, 10-pin VSON miniaturization, and 125°C qualification - making it the sole choice for thermally demanding, battery-conscious dual-opamp designs.

Availability

OPA2373AIDGSR is available at Aetrix Electronics and suitable for portable medical devices, industrial temperature transmitters, battery-powered gas sensors, and low-voltage audio signal chains requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2373AIDGSR 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 90 years of innovation in precision amplifiers and power management ICs.

The OPAx373 family was engineered specifically for low-power, high-accuracy signal conditioning in portable and harsh-environment applications - emphasizing rail-to-rail operation, micropower efficiency, and robust thermal performance from –40°C to 125°C.

FAQ

What is the maximum capacitive load the OPA2373AIDGSR can drive stably in unity-gain configuration?

The OPA2373AIDGSR maintains stable unity-gain operation with capacitive loads up to 250 pF, as verified in TI's SBOS279F datasheet Figure 17. For loads exceeding 250 pF, a small series resistor (10–20 Ω) between the output and load capacitance restores phase margin without degrading DC accuracy. This behavior is intrinsic to the internal compensation design and applies identically to both channels of the OPA2373AIDGSR.

Does the OPA2373AIDGSR require external pull-up or pull-down resistors on its Enable pins?

No, the OPA2373AIDGSR Enable A and Enable B inputs have CMOS-compatible thresholds with no internal pull resistors, but they do not require external biasing. Logic low (<0.8 V relative to V–) disables the respective channel, while logic high (>2 V relative to V–) enables it. Floating Enable pins default to disabled state due to internal leakage paths, so external resistors are optional unless noise immunity in high-EMI environments is required. This behavior is confirmed in the Pin Functions table for DGS-package OPA2373 devices.

Can the OPA2373AIDGSR operate from a 2.3-V supply while maintaining full rail-to-rail input range?

Yes - the OPA2373AIDGSR is fully specified from 2.3 V to 5.5 V, and its rail-to-rail input range extends from (V–) – 0.2 V to (V+) + 0.2 V across this entire supply range. At 2.3 V, this provides a usable common-mode window of –0.2 V to +2.5 V, enabling direct interfacing with sub-1-V sensors and energy-harvesting sources. This capability is explicitly validated in Section 7.3 (Recommended Operating Conditions) and Figure 21 of the SBOS279F datasheet for the OPA2373AIDGSR.

What is the thermal resistance (RθJA) of the OPA2373AIDGSR in its 10-pin VSON (DGS) package?

The junction-to-ambient thermal resistance (RθJA) for the OPA2373AIDGSR in the 10-pin VSON (DGS) package is 170.6°C/W, as published in Section 7.6 of the SBOS279F datasheet. This value assumes standard JEDEC 2S2P test board conditions. With proper PCB layout - including a minimum 100 mm² copper pour connected to the exposed thermal pad on the underside - actual board-level RθJA can improve significantly, enabling continuous operation at full rated load up to 125°C ambient.

How does the OPA2373AIDGSR's input offset voltage drift compare to industry-standard precision op amps?

The OPA2373AIDGSR exhibits a maximum input offset voltage drift of 3 µV/°C across –40°C to +125°C, as specified in Section 7.9 of the SBOS279F datasheet. This is comparable to mid-precision CMOS op amps (e.g., MCP6002: 5 µV/°C) but less stable than chopper-stabilized devices (e.g., LTC2050: 0.03 µV/°C). Its 5 mV max VOS at 25°C positions it for applications where moderate DC accuracy suffices - such as sensor buffering prior to digitization - rather than ultra-precision instrumentation requiring sub-100-µV total error budgets.