Texas Instruments OPA2704EA/2K5G4

Overview

OPA2704EA/2K5G4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for gains ≥5, delivering 3MHz gain-bandwidth product and 3V/µs slew rate at 160µA per amplifier quiescent current. It operates from ±2V to ±6V dual supplies (or 4V–12V single supply), features 160µV max input offset voltage and 90dB full-scale CMRR, and is used in precision sensor signal conditioning and portable data acquisition front-ends.

For engineers reviewing the OPA2704EA/2K5G4 datasheet, OPA2704EA/2K5G4 pinout, OPA2704EA/2K5G4 application, or OPA2704EA/2K5G4 equivalent, this page provides verified package mapping (SOIC-8), confirmed dual-amplifier topology, rail-to-rail I/O behavior, thermal performance (θ_JA = 150°C/W), and validated alternatives for G ≥ 5 high-speed buffering and amplification.

Technical Context

The OPA2704EA/2K5G4 implements a complementary input stage-parallel N-channel and P-channel differential pairs-to achieve rail-to-rail input swing extending 300mV beyond supply rails. Its output uses a class AB common-source stage enabling 40mV rail-to-rail swing into 100kΩ loads.

Optimized for non-inverting gains of 5 or greater, it achieves 3MHz GBW and 3V/µs slew rate with unity-gain instability avoided by design; stability requires minimum closed-loop gain ≥5, distinguishing it from the unity-gain-stable OPA2703 family.

Key Specifications

Pinout & Package

OPA2704EA/2K5G4 is packaged in an 8-pin SOIC (SOIC-8, package code D), with thermal resistance θ_JA = 150°C/W. Pinout conforms to industry-standard dual op amp configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2704UA/2K5, the OPA2704EA/2K5G4 offers identical performance in a functionally equivalent package; versus AD8642ARZ, it trades slightly higher offset for wider supply range, higher slew rate, and guaranteed G ≥ 5 stability-critical for industrial 5V/±5V signal chains.

Availability

OPA2704EA/2K5G4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and dual-supply reference buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2704EA/2K5G4 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 reliability.

The OPA703/704 family-including OPA2704EA/2K5G4-is engineered for low-power, rail-to-rail signal conditioning in space-constrained, battery-operated, and industrial measurement systems demanding high accuracy and wide supply flexibility.

FAQ

What is the minimum recommended gain for stable operation of the OPA2704EA/2K5G4?

The OPA2704EA/2K5G4 is optimized for closed-loop gains of 5 or greater. It is not unity-gain stable; using it at G = 1 may cause oscillation or excessive overshoot. For G < 5 applications, the OPA2703 family is specified and guaranteed. The OPA2704EA/2K5G4 datasheet explicitly states "optimized for gains of 5 or greater" and provides frequency response curves only for G = 5.

Does the OPA2704EA/2K5G4 support true rail-to-rail input beyond the supply rails?

Yes-the OPA2704EA/2K5G4 input common-mode voltage range extends 300mV beyond both supply rails (V− − 0.3V to V+ + 0.3V) at room temperature, enabled by its complementary N/P-channel input stage. This allows direct interfacing with overvoltage-tolerant sensors or signals that transiently exceed the supply, provided input current is limited to ≤10mA via series resistance.

What is the maximum capacitive load the OPA2704EA/2K5G4 can drive stably at G = 5?

At G = 5, the OPA2704EA/2K5G4 can drive up to 1000pF of pure capacitive load while maintaining phase margin >45°, as confirmed by the "Small-Signal Overshoot vs Capacitive Load" curve in the SBOS180A datasheet. For loads >100pF, adding a small feedback capacitor (e.g., 3pF) improves settling time and reduces ringing, as shown in Figure 6 of the datasheet.

How does the OPA2704EA/2K5G4 differ from the OPA2703EA/2K5 in practical circuit design?

The OPA2704EA/2K5G4 provides 3MHz GBW and 3V/µs slew rate at G ≥ 5, whereas the OPA2703EA/2K5 delivers 1MHz GBW and 0.6V/µs at G = 1. The OPA2704EA/2K5G4 is unstable below G = 5; the OPA2703EA/2K5 is unity-gain stable. Thus, OPA2704EA/2K5G4 is selected for speed-critical G ≥ 5 stages (e.g., ADC drivers), while OPA2703EA/2K5 suits general-purpose buffering and filtering.

Is the OPA2704EA/2K5G4 pin-compatible with standard dual op amp footprints?

Yes-OPA2704EA/2K5G4 uses the industry-standard SOIC-8 (package D) footprint with pin 1 in the top-left corner (notch/dot marked), matching pinout conventions of LM358, TL072, and OPA234. Pin functions (Out A, −In A, +In A, V−, +In B, −In B, Out B, V+) are identical across these dual op amps, enabling drop-in replacement where electrical specs align.