Texas Instruments OPA2990IDDFR

Overview

OPA2990IDDFR from Texas Instruments is a dual-channel, 40-V rail-to-rail input/output operational amplifier with ±300 µV max offset voltage, 1.1-MHz gain-bandwidth product, and 120 µA per amplifier quiescent current. It operates from ±1.35 V to ±20 V or 2.7 V to 40 V supplies and supports high-precision signal conditioning in multiplexed data acquisition and industrial power stage monitoring.

For engineers reviewing the OPA2990IDDFR datasheet, OPA2990IDDFR pinout, OPA2990IDDFR application, or OPA2990IDDFR equivalent, this page delivers verified specifications, SOIC-8 package details, dual-channel functional context, and validated alternative options for high-voltage precision amplification tasks.

Technical Context

The OPA2990IDDFR implements a dual-channel CMOS input stage with rail-to-rail common-mode and differential input voltage range extending to both supply rails, enabling direct interface with high-side and low-side current-sense resistors without level-shifting. Its MUX-friendly inputs tolerate overvoltage up to the rails and support open-loop comparator operation.

Each channel features independent high-impedance inputs (±10 pA bias current), 115 dB CMRR at 40 V supply, and robust 78 dB EMIRR at 1.8 GHz - critical for noise-sensitive industrial analog front-ends operating in electrically harsh environments.

Key Specifications

Pinout & Package

OPA2990IDDFR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with exposed pad not present. Pin 1 is marked by a beveled corner or dot; orientation follows standard SOIC tape-and-reel indexing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2197IDR and LM2904BDR, the OPA2990IDDFR uniquely balances 40-V operation, ±300 µV offset, rail-to-rail input, and 120 µA/ch quiescent current - making it optimal for industrial data acquisition where supply headroom, DC accuracy, and power efficiency coexist.

Availability

OPA2990IDDFR is available at Aetrix Electronics and suitable for multiplexed data-acquisition systems, motor drive control modules, and programmable logic controller analog input modules requiring stable component supply across extended temperature and voltage ranges.

Supply support for OPA2990IDDFR 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The OPAx990 family was designed specifically for high-voltage, high-precision industrial signal conditioning - emphasizing rail-to-rail operation, low drift, and robust EMI immunity in harsh electrical environments.

FAQ

What is the maximum supply voltage for OPA2990IDDFR?

The OPA2990IDDFR supports a maximum total supply voltage of 40 V, meaning the difference between V+ and V– can reach 40 V. This allows operation from ±20 V dual supplies or single supplies up to +40 V with V– grounded. Absolute maximum ratings specify 42 V, but functional operation is guaranteed only up to 40 V per the recommended operating conditions in the datasheet. Exceeding 40 V may compromise long-term reliability or parametric performance.

Does OPA2990IDDFR include a shutdown feature?

No, the OPA2990IDDFR does not include a shutdown pin. The DDF package variant corresponds to the standard dual-channel version without shutdown functionality. Shutdown capability is only available in the OPA2990S variants (e.g., OPA2990SIDDFR), which add SHDN1 and SHDN2 pins. For OPA2990IDDFR, power control must be implemented externally via supply sequencing or enable circuitry.

What is the input common-mode voltage range of OPA2990IDDFR?

The OPA2990IDDFR features a rail-to-rail input common-mode voltage range extending from (V–) – 0.2 V to (V+) + 0.2 V. This allows the device to accept input signals beyond both supply rails by up to 200 mV - a key enabler for MUX-friendly operation and high-side current sensing without external level-shifting. The specification holds across the full –40°C to 125°C temperature range.

Can OPA2990IDDFR drive capacitive loads directly?

Yes, the OPA2990IDDFR is specified to drive capacitive loads up to at least 20 pF while maintaining stability, as confirmed by its 60° phase margin under G = +1, RL = 10 kΩ, CL = 20 pF test condition. For larger loads (e.g., >100 pF), external isolation resistance (e.g., 10–100 Ω in series with the output) is recommended to prevent peaking or oscillation, especially in high-gain configurations.

Is OPA2990IDDFR suitable for use as a comparator?

Yes, the OPA2990IDDFR is explicitly designed for open-loop comparator use due to its MUX-friendly inputs - it operates linearly with differential inputs up to the supply rails and tolerates indefinite saturation without phase reversal or latch-up. However, it lacks built-in hysteresis or push-pull output; external hysteresis resistors and an output pull-up are required for clean digital transitions in comparator applications.