Texas Instruments OPA2690I-14DR

Overview

OPA2690I-14DR from Texas Instruments is a dual, wideband, voltage-feedback operational amplifier with independent disable control per channel, designed for high-fidelity signal conditioning in single-supply ADC driver, video line driving, and xDSL receiver applications. It delivers 220MHz small-signal bandwidth (G = +2), ±4.0V output swing on ±5V supplies, 1800 V/µs slew rate, and –70 dBc 3rd-harmonic distortion at 5 MHz with 2 V_PP output into 100Ω.

For engineers reviewing the OPA2690I-14DR datasheet, OPA2690I-14DR pinout, OPA2690I-14DR application, or OPA2690I-14DR equivalent, key selection criteria include its SO-14 package with dedicated DIS A/DIS B pins, 190 mA output current per channel, low 5.5 mA/ch quiescent current, disable current < 200 µA/ch, and guaranteed performance across –40°C to +85°C.

Technical Context

The OPA2690I-14DR employs a novel voltage-feedback architecture with a transconductance element placed between two input buffers, enabling 1800 V/µs slew rate while maintaining unity-gain stability. Its output stage supports high-current sourcing/sinking (>190 mA) with minimal headroom-only 1 V from rails on +5V supply-making it suitable for driving 100Ω loads to midpoint bias (2.5 V).

Each channel features independent digital disable control (DIS A/DIS B), reducing supply current to <200 µA/ch and placing the output in high-impedance state. The device operates over ±2.5V to ±6V dual supply or +5V to +12V single supply, with input common-mode range extending to ±3.5 V (dual) or 1.5 V to 3.5 V (single +5V), and CMRR ≥63 dB.

Key Specifications

Pinout & Package

The OPA2690I-14DR is housed in a 14-pin SOIC (SO-14) package with exposed pad thermal enhancement, rated for –40°C to +85°C operation. Pin 1 is marked via dot; pin numbering follows standard SOIC convention (counterclockwise from index mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2691IDR and LMH6629MA/NOPB, the OPA2690I-14DR uniquely combines per-channel disable, 190 mA drive, and 220 MHz bandwidth in a voltage-feedback topology-enabling flexible power management and robust termination without sacrificing linearity or settling speed.

Availability

OPA2690I-14DR is available at Aetrix Electronics and suitable for video line driving, single-supply ADC interface, xDSL receiver, high-speed imaging, and active filter applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for OPA2690I-14DR 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 high-performance op amps, data converters, and interface ICs.

The OPA2690 product line targets high-speed signal conditioning in communications, test equipment, and imaging systems-designed specifically for applications demanding wide bandwidth, low distortion, and flexible power control in compact SO-14 packaging.

FAQ

What is the maximum operating supply voltage for OPA2690I-14DR?

The OPA2690I-14DR supports a maximum operating voltage of ±6.0 V for dual-supply operation and +12 V for single-supply use. Absolute maximum ratings specify ±6.5 V on power pins; exceeding these may cause permanent damage. For reliable operation, TI recommends staying within the specified limits across the full temperature range (–40°C to +85°C). The OPA2690I-14DR achieves optimal performance at ±5 V or +5 V, where key parameters like bandwidth and distortion are characterized.

Does OPA2690I-14DR support true rail-to-rail input or output?

No, the OPA2690I-14DR is not a rail-to-rail device. Its input common-mode range extends to ±3.5 V on ±5 V supplies (or 1.5 V to 3.5 V on +5 V), and output swing reaches ±4.0 V (no load) or ±3.9 V (100 Ω load) under ±5 V conditions. On +5 V single supply, output swings from 1.0 V to 4.0 V (no load), requiring ≥1 V headroom from each rail. This limited headroom is intentional to preserve bandwidth and linearity-unlike rail-to-rail op amps that sacrifice speed for voltage range.

How does the disable function work on OPA2690I-14DR?

The OPA2690I-14DR provides independent active-low disable control on pins 3 (DIS A) and 5 (DIS B). When pulled LOW (≤1.5 V), each channel's supply current drops to <200 µA/ch and its output enters high-impedance state with 70 dB off-isolation at 5 MHz. Leaving DIS pins open or HIGH (≥3.3 V) enables normal operation. Enable/disable times are 25 ns and 200 ns respectively. This feature is exclusive to the SO-14 package (OPA2690I-14DR); SO-8 variants lack disable pins.

Can OPA2690I-14DR drive a 50Ω load directly?

Yes-the OPA2690I-14DR can drive a 50Ω load directly, though with reduced output swing and increased power dissipation. At ±5 V, it delivers ±3.9 V into 100Ω; into 50Ω, output swing decreases slightly (±3.7 V typical), and sourcing/sinking current remains >±160 mA. For sustained 50Ω driving, ensure thermal design accommodates higher junction temperature (θ_JA = 150°C/W for SO-14), and verify stability with appropriate series resistance (e.g., 50Ω in series with output) per Figure 36 in the SBOS238G datasheet.

What is the harmonic distortion performance of OPA2690I-14DR at 10 MHz?

At 10 MHz, G = +2, 2 V_PP output, and RL = 100Ω, the OPA2690I-14DR achieves –64 dBc 2nd-harmonic and –66 dBc 3rd-harmonic distortion (typical, ±5 V supply). Performance degrades slightly at higher frequencies due to bandwidth roll-off: at 20 MHz, 3rd-harmonic is –60 dBc. These values are measured with proper PCB layout-including 0.1 µF supply decoupling between ±VS pins-and meet requirements for 10-bit ADC drivers up to 40 MSPS sampling rates.