Texas Instruments OPA374AIDRG4

Overview

OPA374AIDRG4 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, precision signal conditioning in battery-powered and portable systems. It delivers 6.5-MHz gain-bandwidth, 5-V/µs slew rate, and 585-µA quiescent current while operating from 2.3 V to 5.5 V - enabling high-fidelity analog front-ends in space-constrained sensor interfaces and data acquisition circuits.

For engineers reviewing the OPA374AIDRG4 datasheet, OPA374AIDRG4 pinout, OPA374AIDRG4 application, or OPA374AIDRG4 equivalent, key selection criteria include its rail-to-rail I/O swing (within 25 mV of rails), 10-pA max input bias current, 5-mV max input offset voltage, and guaranteed operation up to 125°C - all in a 5-pin SOT-23 package suitable for compact, thermally demanding layouts.

Technical Context

The OPA374AIDRG4 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 200 mV beyond both supply rails, with no phase inversion when inputs exceed supplies (if current-limited to ≤10 mA). Its class AB output stage supports rail-to-rail output swing down to 18 mV from rails under light loads (100 kΩ) and maintains >80 dB CMRR across –40°C to +125°C.

Unlike the pin-compatible OPA373 family, the OPA374AIDRG4 omits shutdown functionality and is specified for single-supply operation only (2.3 V–5.5 V), with electrical characteristics fully characterized over temperature and supply voltage - including 3 µV/°C max offset drift and 15 nV/√Hz input voltage noise density at 10 kHz.

Key Specifications

Pinout & Package

The OPA374AIDRG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm × 1.15 mm, with exposed thermal pad connected internally to V– for improved power dissipation in high-output-current conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with OPA374AIDRG4, OPA374AIDBVR offers identical performance with optimized packaging for SMT lines, while MCP6001T-E/OT trades 85% bandwidth reduction and higher offset for lower unit cost - making it viable only in non-critical, low-frequency signal paths.

Availability

OPA374AIDRG4 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, active anti-aliasing filters, and industrial current loop receivers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OPA374AIDRG4 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The OPAx374 product line was engineered for low-power, precision signal conditioning in space-constrained, battery-operated systems - emphasizing rail-to-rail I/O, micropower efficiency, and robust operation across –40°C to +125°C.

FAQ

What is the maximum capacitive load the OPA374AIDRG4 can drive in unity-gain configuration?

The OPA374AIDRG4 can reliably drive up to 250 pF of pure capacitive load in unity-gain configuration while maintaining ≥45° phase margin and stable step response. For loads exceeding 250 pF, adding a 10-Ω to 20-Ω isolation resistor between the output and capacitance restores stability without degrading DC accuracy - a technique validated in TI's SBOS279F datasheet Figure 17.

Does the OPA374AIDRG4 support dual-supply operation?

No, the OPA374AIDRG4 is specified and tested exclusively for single-supply operation from 2.3 V to 5.5 V. While it functions with split supplies (e.g., ±2.75 V), its electrical characteristics - including input common-mode range, offset voltage, and PSRR - are only guaranteed across the single-supply range per the SBOS279F datasheet Section 7.3. Dual-supply designs should use OPA373 variants instead.

What is the thermal pad connection requirement for the OPA374AIDRG4 in the SOT-23-5 (DBV) package?

The exposed thermal pad on the underside of the OPA374AIDRG4 DBV package is internally connected to the V– pin. It must be soldered to a PCB copper pour tied directly to the system ground plane or negative supply rail to ensure proper heat dissipation and electrical reference. Leaving the pad floating or unconnected degrades thermal resistance by >100°C/W and may cause instability or premature failure under sustained load.

How does the input stage architecture of the OPA374AIDRG4 prevent phase inversion?

The OPA374AIDRG4 uses a parallel N-channel/P-channel complementary input stage that remains active across the full rail-to-rail input range. Unlike single-pair architectures, this design avoids the input transistor cutoff condition that causes phase reversal. As confirmed in SBOS279F Figure 22, inputs exceeding V+ or falling below V– by up to 500 mV do not invert output polarity - provided input current is limited to ≤10 mA via series resistance.

Is the OPA374AIDRG4 pin-compatible with the OPA373AIDRG4?

No - the OPA374AIDRG4 (5-pin SOT-23) lacks the ENABLE pin present on the 6-pin OPA373AIDRG4. Pin 5 on the OPA374AIDRG4 is V+, whereas pin 5 on the OPA373AIDRG4 is ENABLE. Swapping them without board revision causes permanent damage due to incorrect voltage applied to the enable logic input. The OPA374AIDRG4 and OPA373AIDRG4 share identical OUT, +IN, –IN, and V– pin assignments, but differ fundamentally in control functionality and pin count.