Texas Instruments OPA2726AIDGST

Overview

OPA2726AIDGST from Texas Instruments is a dual, rail-to-rail output, high-speed precision operational amplifier with shutdown control, designed for driving 16-bit ADCs and transimpedance applications. It delivers 20MHz gain-bandwidth, 30V/µs slew rate, 6nV/√Hz input voltage noise at 100kHz, ±2V to ±6V or +4V to +12V supply operation, and 150mV rail-to-rail output swing under light loads - enabling high-fidelity signal conditioning in optical networking and test equipment.

For engineers reviewing the OPA2726AIDGST datasheet, OPA2726AIDGST pinout, OPA2726AIDGST application, or OPA2726AIDGST equivalent, key selection criteria include its dual-channel shutdown capability (6µA/ch), fast 450ns 0.01% settling time, low 200pA max input bias current, CMRR >84dB over temperature, and MSOP-10 package compatibility with space-constrained analog front-ends.

Technical Context

The OPA2726AIDGST employs a proprietary 12V analog CMOS process with a patented output stage to achieve 20MHz GBW and 30V/µs slew rate while maintaining <200pA input bias current and 6nV/√Hz noise at 100kHz. Its dual-channel architecture supports independent enable control via DGND-referenced logic inputs.

Rail-to-rail output is realized using a class AB common-source stage, delivering 150mV (A-side) / 175mV (B-side) swing from rails into 100kΩ loads with AOL >110dB. Input common-mode range extends from V− to (V+) − 2V, with CMRR maintained at ≥84dB across −40°C to +125°C.

Key Specifications

Pinout & Package

OPA2726AIDGST is packaged in a 10-pin MSOP (DGS) with exposed thermal pad, optimized for thermal performance (θ_JA = 150°C/W) and PCB area efficiency in dense analog layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2725AIDGKR, OPA2726AIDGST adds integrated shutdown with no pin-count penalty, while OPA2837IRUGR trades rail-to-rail output and low noise for extreme bandwidth - making OPA2726AIDGST optimal for precision 16-bit ADC interfaces where power efficiency and DC-coupled dynamic range are critical.

Availability

OPA2726AIDGST is available at Aetrix Electronics and suitable for optical networking transceivers, high-accuracy data acquisition systems, portable test instruments, and industrial process controllers requiring stable component supply across extended temperature ranges.

Supply support for OPA2726AIDGST 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 amplifiers, data converters, and power management ICs.

The OPA725/726 family was engineered for high-fidelity analog signal conditioning in 16-bit data acquisition, optical sensing, and communication infrastructure - emphasizing low noise, fast settling, and robust rail-to-rail operation across −40°C to +125°C.

FAQ

What is the maximum operating supply voltage for OPA2726AIDGST?

The absolute maximum supply voltage for OPA2726AIDGST is +13.2V on V+, with recommended operation from +4V to +12V (single-supply) or ±2V to ±6V (dual-supply). Exceeding +13.2V risks permanent damage per Absolute Maximum Ratings. Operation at +12V maintains full specification compliance across −40°C to +125°C, including 20MHz GBW and 30V/µs slew rate.

How does the Enable pin interface work on OPA2726AIDGST?

The Enable pin on OPA2726AIDGST is referenced to the DGND pin, not ground or supply rails. The amplifier activates when Enable voltage exceeds DGND + 2V and shuts down when below DGND + 0.8V. DGND can be tied to system ground in dual-supply designs, enabling direct CMOS logic control without level shifters - a key advantage over non-DGND-referenced shutdown op amps.

Can OPA2726AIDGST drive capacitive loads without instability?

Yes, OPA2726AIDGST is unity-gain stable and can drive ≥20pF loads as specified. For larger capacitive loads (e.g., >100pF), inserting a 10Ω–20Ω series resistor inside the feedback loop - as shown in TI's Figure 3 - suppresses ringing while preserving DC accuracy. Stability is gain-dependent: higher closed-loop gains improve capacitive load tolerance per the Small-Signal Overshoot vs Capacitive Load curve.

What is the input common-mode voltage range of OPA2726AIDGST?

The input common-mode voltage range of OPA2726AIDGST extends from V− to (V+) − 2V, fully including ground in single-supply operation. CMRR remains ≥84dB across this range at −40°C to +125°C, and improves to ≥94dB when V_CM stays within V− to (V+) − 3V - critical for precision instrumentation where input offsets must remain stable over wide signal excursions.

Is OPA2726AIDGST suitable for transimpedance amplifier designs with photodiodes?

Yes, OPA2726AIDGST is explicitly optimized for transimpedance applications: its <200pA input bias current avoids gain error with high-value feedback resistors (e.g., 10MΩ), 6nV/√Hz noise at 100kHz minimizes amplified photodiode capacitance effects, and rail-to-rail output accommodates single-supply zero-reference designs. TI Application Bulletin SBOA055 confirms its use in dual- and single-supply photodiode circuits.