Texas Instruments OPA683IDBVT

Overview

OPA683IDBVT from Texas Instruments is a very low-power, current-feedback operational amplifier with disable control, designed for high-speed signal conditioning in space- and power-constrained systems. It delivers 150MHz bandwidth at G = +2, 110mA output drive, < –69dBc harmonic distortion at 5MHz, and operates from ±2.5V to ±6V or single +5V to +12V supplies - enabling use in broadcast video drivers and ADC input stages.

For engineers reviewing the OPA683IDBVT datasheet, OPA683IDBVT pinout, OPA683IDBVT application, or OPA683IDBVT equivalent, key selection criteria include its CFBplus architecture for gain-independent bandwidth, 40ns enable time, 100µA shutdown current, SOT-23-6 package thermal resistance (150°C/W), and verified performance into 100Ω loads with ±4VPP swing on ±5V supplies.

Technical Context

The OPA683IDBVT implements a CFBplus architecture featuring an internally closed-loop input buffer stage that linearizes inverting-input impedance, enabling exceptional bandwidth retention up to G = +100 and reduced harmonic distortion versus prior low-power CFB amplifiers. Its transimpedance gain is 700kΩ (min), with inverting input resistance of 4.5Ω (typ) and noninverting input impedance of 50kΩ || 2pF.

It supports dual-supply (±2.5V to ±6V) and single-supply (+5V to +12V) operation with rail-to-rail input common-mode range (±3.75V on ±5V) and output swing (±4.1V on 1kΩ). The DIS pin enables fast (40ns) transition to high-impedance I/O state with <100µA supply current, while maintaining 70dB off-isolation at 5MHz.

Key Specifications

Pinout & Package

SOT-23-6 package (DBV), 1.6mm × 2.9mm footprint, 150°C/W junction-to-ambient thermal resistance, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-feedback amplifier applications.

Compared with OPA684IDBVT and OPA2683IDGKT, the OPA683IDBVT uniquely balances ultra-low 0.94mA supply current, 150MHz bandwidth, and active disable in a 6-pin SOT-23 - making it optimal for battery-powered or thermally limited single-channel high-speed analog front-ends.

Availability

OPA683IDBVT is available at Aetrix Electronics and suitable for professional broadcast video drivers, ADC input stages, SAW filter post-amplifiers, and short-loop ADSL CO drivers requiring stable component supply with guaranteed long-term manufacturability.

Supply support for OPA683IDBVT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The OPA683IDBVT belongs to TI's high-speed precision op amp product line, engineered specifically for low-power, wideband current-feedback applications where bandwidth stability across gain, video fidelity, and dynamic power control are critical design requirements.

FAQ

What is the minimum supply voltage required for OPA683IDBVT operation?

The OPA683IDBVT supports dual-supply operation down to ±2.5V and single-supply operation down to +2.8V. At ±2.5V, it maintains functional bandwidth and distortion performance, though small-signal bandwidth decreases to ~120MHz at G = +2. For reliable startup and specification compliance, TI specifies ±2.5V as the absolute minimum dual supply and +2.8V as the minimum single supply.

Does OPA683IDBVT support true rail-to-rail input and output operation?

The OPA683IDBVT does not provide rail-to-rail input or output swing. Its input common-mode range extends to ±3.75V on ±5V supplies (1.25V from each rail), and output swing is ±4.1V on ±5V into 1kΩ (0.9V from each rail). On +5V single supply, input range is 1.1V to 3.9V and output swings from 0.8V to 4.2V - sufficient for most AC-coupled video and data acquisition interfaces but not for direct rail-referenced sensor interfacing.

How does the DIS pin function on OPA683IDBVT, and what happens to the pins during disable?

The DIS pin on OPA683IDBVT is active-low. When pulled ≤1.5V, the amplifier enters shutdown mode with supply current dropping to 100µA (typ), and both input and output pins go to high-impedance state. The enable time is 40ns (typ), and off-isolation is 70dB at 5MHz. Leaving DIS open or holding it ≥3.4V maintains normal operation. No external pull-up is required due to internal biasing.

Can OPA683IDBVT drive a 50Ω load directly, and what is the impact on performance?

Yes, OPA683IDBVT can drive a 50Ω load directly, delivering ±4VPP swing on ±5V supplies with >100mA output current. However, driving 50Ω reduces output voltage swing due to power dissipation and increases thermal stress (θJA = 150°C/W). Performance impact includes ~10% bandwidth reduction and slight degradation in harmonic distortion (e.g., –63dBc 2nd-harmonic at 5MHz vs –65dBc into 1kΩ), but remains within broadcast video specifications.

What layout recommendations ensure stable operation of OPA683IDBVT at high frequencies?

For stable high-frequency operation, place 0.1µF ceramic decoupling capacitors ≤2mm from each supply pin to ground, use short, direct traces for feedback (RF) and gain-setting (RG) resistors, route the DIS pin away from noisy digital lines, and maintain solid ground plane beneath the SOT-23-6 footprint. TI recommends RF = 1.2kΩ for G = +2 and keeping RG ≥50Ω to avoid instability; avoid vias in feedback paths and minimize parasitic capacitance at the inverting input.