Texas Instruments OPA2725AID

Overview

OPA2725AID from Texas Instruments is a dual, rail-to-rail output, 20MHz gain-bandwidth precision CMOS operational amplifier optimized for driving 16-bit ADCs such as the ADS8342. It delivers 30V/µs slew rate, 6nV/√Hz input voltage noise at 100kHz, 0.0003% THD+N at 1kHz, and operates from ±2V to ±6V or +4V to +12V supplies. Its key role is high-fidelity signal buffering in optical networking transimpedance amplifiers and active filter stages.

For engineers reviewing the OPA2725AID datasheet, OPA2725AID pinout, OPA2725AID application, or OPA2725AID equivalent, this page provides verified technical context, SO-8 package pin mapping, real-world settling performance into 16-bit converters, low-noise design value for photodiode I/V conversion, and validated alternative options for precision high-speed op amp selection.

Technical Context

The OPA2725AID uses a proprietary 12V analog CMOS process with a patented output stage enabling 20MHz GBW and rail-to-rail output swing within 175mV of rails (RL = 100kΩ). Its input stage features <200pA bias current and extends common-mode range to ground, supporting single-supply operation down to 4V.

It achieves 16-bit settling in ≤450ns (0.01%) with excellent PSRR (>100dB), CMRR (>94dB), and open-loop gain (>120dB at 25°C), making it suitable for high-resolution data acquisition where charge injection and dynamic range are critical.

Key Specifications

Pinout & Package

OPA2725AID is packaged in an 8-pin SOIC (SO-8) surface-mount package with exposed pad not present. Pin functions are electrically validated per TI SBOS278B datasheet Figure 3 (OPA2725 SO-8 configuration).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision high-speed op amp applications.

Compared with OPA2725AID, OPA2726AIDGST adds shutdown control at the cost of package and pinout change, while OPA2350EA/250 retains SO-8 compatibility but increases voltage noise by 25% at 100kHz-making OPA2725AID optimal for low-noise, dual-channel, non-shutdown precision buffering.

Availability

OPA2725AID is available at Aetrix Electronics and suitable for optical transceiver modules, high-resolution data acquisition systems, and portable audio line drivers requiring stable component supply across industrial temperature ranges (−40°C to +125°C).

Supply support for OPA2725AID 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 OPA2725AID belongs to TI's OPA725/OPA726 series-designed specifically for high-speed, low-noise, rail-to-rail output applications in optical networking, test equipment, and 16-bit data acquisition systems.

FAQ

What is the maximum operating supply voltage for OPA2725AID?

The absolute maximum supply voltage for OPA2725AID is +13.2V (per Absolute Maximum Ratings table). The recommended operating range is ±2V to ±6V dual supply or +4V to +12V single supply. Operation beyond +12V risks parametric degradation and is not characterized; sustained use above +13.2V may cause permanent damage.

Does OPA2725AID support rail-to-rail input?

No, OPA2725AID does not support rail-to-rail input. Its common-mode input voltage range extends from V− to (V+) − 2V, meaning the inputs cannot swing within 2V of the positive rail. However, the input range does include ground (V−), enabling true single-supply operation with inputs referenced to GND.

What is the typical input bias current of OPA2725AID at 25°C?

The typical input bias current of OPA2725AID at 25°C is 30pA, with a maximum of 200pA over temperature (−40°C to +125°C). This ultra-low bias current is critical for high-impedance applications such as transimpedance amplifiers using multi-megaohm feedback resistors, where even picoamp-level errors impact DC accuracy.

Can OPA2725AID drive capacitive loads without oscillation?

Yes, OPA2725AID is unity-gain stable and can drive moderate capacitive loads. With CL = 20pF (typical ADC input), it exhibits clean step response. For larger loads (>100pF), stability is enhanced by adding a 10Ω–20Ω series resistor inside the feedback loop, as documented in Figure 3 of the datasheet-preserving DC accuracy while suppressing ringing.

Is OPA2725AID pin-compatible with OPA2726AIDGST?

No, OPA2725AID is not pin-compatible with OPA2726AIDGST. OPA2725AID uses an 8-pin SOIC package with dual amplifier pins only, while OPA2726AIDGST uses a 10-pin MSOP package that adds Enable and DGND pins. Substituting either part requires PCB layout changes and firmware logic updates for shutdown control.