Texas Instruments OPA2614IDR

Overview

OPA2614IDR from Texas Instruments is a dual, high-speed, voltage-feedback operational amplifier optimized for xDSL differential line driving and precision baseband I/Q amplification. It delivers 1.8nV/√Hz input voltage noise, 290MHz gain-bandwidth product (G ≥ 20), ±350mA output current per channel, ±0.2mV input offset voltage, and operates from ±2.5V to ±6V or single +5V to +12V supplies - enabling robust twisted-pair line drive with low harmonic distortion.

For engineers reviewing the OPA2614IDR datasheet, OPA2614IDR pinout, OPA2614IDR application, or OPA2614IDR equivalent, this page provides verified circuit role, SO-8 package mapping, differential configuration performance data, supply-flexible biasing guidance, and validated alternatives for xDSL driver, ADC driver, and transimpedance amplifier designs.

Technical Context

The OPA2614IDR implements a wideband voltage-feedback architecture with a linear, high-current output stage delivering >280mA sourcing/sinking at room temperature while maintaining <−80dBc 2nd-harmonic distortion at 1MHz (2VPP, RL ≥ 500Ω). Its input stage features matched bipolar transistors enabling low 1.8nV/√Hz noise and ±0.2mV offset, critical for high-dynamic-range baseband I/Q channels.

Designed for differential operation, it supports noninverting and inverting configurations with gain-dependent bandwidth (e.g., 100MHz min at G = +4, VO = 0.1VPP, ±6V) and exhibits <5ns rise/fall time (G = +4, 0.2V step). Channel-to-channel crosstalk is −68dBc at 1MHz, confirming tight matching for dual-channel signal paths.

Key Specifications

Pinout & Package

OPA2614IDR is housed in an SO-8 (D) package with exposed pad (not electrically connected), rated for −40°C to +85°C operation and 125°C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2614IDR, OPA2690 trades lower noise and higher output current for reduced supply flexibility and higher quiescent current (8.5mA/ch), while OPA2677 sacrifices DC precision and differential stability for extreme bandwidth - making OPA2614IDR the optimal choice for xDSL line drivers and matched I/Q baseband amplifiers requiring both low noise and high linear output current.

Availability

OPA2614IDR is available at Aetrix Electronics and suitable for xDSL line driver modules, 16-bit data acquisition systems, and precision baseband I/Q receiver designs requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for OPA2614IDR 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 high-performance op amps and signal chain solutions.

The OPA2614IDR belongs to TI's OPAx614 family of wideband, low-noise, high-output-current op amps engineered specifically for xDSL line drivers and precision differential signal conditioning in communications infrastructure.

FAQ

What is the maximum supply voltage for OPA2614IDR?

The absolute maximum supply voltage for OPA2614IDR is ±6.5V at −40°C to +85°C ambient. The recommended operating range is ±2.5V to ±6V for dual supply or +5V to +12V for single supply. Exceeding ±6.5V risks permanent damage, and operation above ±6.3V (max operating voltage) degrades parametric performance and reliability. Always use proper decoupling capacitors near the +VS and −VS pins of the OPA2614IDR.

Can OPA2614IDR drive a 100Ω differential load in xDSL applications?

Yes, OPA2614IDR is explicitly designed for this role: it delivers ±350mA per channel into linear loads, supporting 100Ω differential termination (e.g., 50Ω per leg) with ≤ −80dBc 2nd-harmonic distortion at 1MHz (2VPP). Its output stage maintains low crossover distortion even under heavy bipolar current demand - a key differentiator versus legacy boosted-output op amps. This capability is validated in TI's SBOS305D datasheet Figure 5 and differential configuration test circuits.

Does OPA2614IDR support single +5V supply operation?

Yes, OPA2614IDR is fully specified for single +5V operation: it achieves 150MHz small-signal bandwidth (G = +2), 40MHz large-signal bandwidth (2VPP), and 2.6VPP output swing while consuming only 10.5mA total quiescent current. Input common-mode range extends from 1.2V to 3.8V, and output swings from 1.05V to 3.95V (100Ω to 2.5V), enabling AC-coupled I/Q amplification and ADC driving without rail-to-rail inputs/outputs. Refer to Figure 3 in the OPA2614IDR datasheet for the validated single-supply schematic.

What is the input voltage noise density of OPA2614IDR?

The input voltage noise density of OPA2614IDR is 1.8nV/√Hz (maximum, f > 10kHz, ±6V supply), confirmed across temperature (−40°C to +85°C) and supply conditions. This ultra-low noise enables high-dynamic-range applications such as 14-bit+ baseband I/Q receivers operating up to 5MHz. The value is measured directly at the input pins and remains stable across gain configurations - a key advantage over current-feedback alternatives with higher noise floors.

Is OPA2614IDR pin-compatible with other OPA26xx devices?

No, OPA2614IDR is not pin-compatible with OPA2690, OPA2677, or OPA2613. While all share the SO-8 (D) package footprint, their pin functions differ significantly: OPA2614IDR uses Pin 1 as +VS and Pin 8 as −VS, whereas OPA2690 swaps supply pins (Pin 1 = −VS, Pin 8 = +VS), and OPA2677 assigns Pin 1 to Inverting Input A. Substituting without board revision will cause functional failure. Always verify pinout diagrams in each device's official datasheet before replacement.