Texas Instruments OPA820IDBVRG4

Overview

OPA820IDBVRG4 from Texas Instruments is a unity-gain stable, low-noise, voltage-feedback operational amplifier in a 5-pin SOT-23 package. It delivers 240 MHz small-signal bandwidth at G = 2, 2.5 nV/√Hz input voltage noise, ±110 mA output current, and operates from ±2.5 V to ±6 V or single 5 V to 12 V supplies. It serves as an ADC preamplifier in high-speed data acquisition systems such as the 14-bit, 10 MSPS ADS850 interface.

For engineers reviewing the OPA820IDBVRG4 datasheet, OPA820IDBVRG4 pinout, OPA820IDBVRG4 application, or OPA820IDBVRG4 equivalent, key selection criteria include its 800-MHz unity-gain bandwidth with <1-dB peaking, differential gain/phase of 0.01%/0.03° for composite video, rail-compatible 2-VPP swing on 5-V supply, and thermal performance enabled by industry-lowest SOT-23 thermal impedance.

Technical Context

The OPA820IDBVRG4 uses a voltage-feedback architecture optimized for unity-gain stability without external compensation. Its internal topology supports >800-MHz bandwidth at G = 1 while maintaining <0.5 dB peaking and 22 ns settling to 0.02% - critical for pulse-amplifier and fast-settling ADC driver applications.

It features minimal input/output voltage headroom: common-mode input range extends to ±3.6 V (±5 V supply) and output swing reaches ±3.4 V into 100 Ω, enabling direct interfacing with mid-supply-referenced ADCs like the ADS850 without level-shifting circuitry.

Key Specifications

Pinout & Package

The OPA820IDBVRG4 is housed in a 5-pin SOT-23 package (2.90 mm × 1.60 mm body size), optimized for high-density portable designs and offering the industry's lowest thermal impedance in its package class.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-feedback op amp applications.

Compared with OPA820IDBVRG4, OPA830IDBVR trades noise and output drive for higher gain-bandwidth, while LMH6629MF/NOPB prioritizes voltage noise at the expense of video-grade linearity and unity-gain stability assurance.

Availability

OPA820IDBVRG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, composite video infrastructure, optical receiver front-ends, and portable test instrumentation requiring stable component supply across commercial and industrial temperature ranges.

Supply support for OPA820IDBVRG4 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 power management ICs.

The OPA820IDBVRG4 belongs to TI's high-speed precision op amp product line, engineered for applications demanding simultaneous wide bandwidth, low noise, and DC accuracy - particularly ADC drivers, video line drivers, and optical signal chains.

FAQ

What is the maximum small-signal bandwidth of the OPA820IDBVRG4 at G = 2?

The OPA820IDBVRG4 achieves a typical small-signal bandwidth of 240 MHz at G = 2 under ±5 V supply conditions and 25°C ambient. This value drops to 230 MHz at 25°C with 5-V single supply, and further to 151 MHz across the full –40°C to +85°C operating range - all verified per TI SBOS303D datasheet Section 7.6.

Does the OPA820IDBVRG4 require external compensation for unity-gain stability?

No, the OPA820IDBVRG4 is internally compensated for unity-gain stability. It delivers >800-MHz bandwidth at G = 1 with less than 1-dB peaking and no external components required - confirmed in the device description and Figure 1 of the SBOS303D datasheet.

What is the output voltage swing of the OPA820IDBVRG4 on a 5-V single supply?

On a 5-V single supply, the OPA820IDBVRG4 delivers a minimum output swing of 1.2 V to 3.8 V (2.6 VPP) with no load, and 1.2 V to 3.6 V (2.4 VPP) into a 100 Ω load at 25°C - sufficient to drive mid-supply-referenced ADCs like the ADS850 without level-shifting circuitry.

Is the OPA820IDBVRG4 suitable for composite video line driving?

Yes, the OPA820IDBVRG4 is explicitly characterized for composite video: it achieves 0.01% differential gain and 0.03° differential phase at PAL conditions (VO = 1.4 VPP, RL = 150 Ω), meeting broadcast-grade line-driver requirements without external calibration components.

What thermal metrics define the OPA820IDBVRG4's reliability in SOT-23 packaging?

The OPA820IDBVRG4 in DBV (SOT-23) package has RθJA = 150°C/W and RθJB = 42.9°C/W, among the lowest thermal resistances in its class. This enables continuous ±110 mA output current operation across –40°C to +85°C ambient, validated per TI's thermal characterization in Section 7.4 of SBOS303D.