Texas Instruments OPA2683IDGSTG4

Overview

OPA2683IDGSTG4 from Texas Instruments is a dual, very low-power, current-feedback operational amplifier in MSOP-10 package, delivering 150MHz bandwidth at G = +2, 110mA output current, and 1.9mA total supply current. It operates from ±2.5V to ±6V or +5V to +12V single supply and is used in professional camera video drivers and differential ADC input stages.

For engineers reviewing the OPA2683IDGSTG4 datasheet, OPA2683IDGSTG4 pinout, OPA2683IDGSTG4 application, or OPA2683IDGSTG4 equivalent, key selection criteria include its CFBPLUS architecture for gain-stable bandwidth, shutdown capability (MSOP-10 only), low distortion (< –65dBc at 5MHz), ±4VPP output swing on ±5V supplies, and 1.2V input headroom enabling robust +5V operation.

Technical Context

The OPA2683IDGSTG4 implements a CFBPLUS architecture with an internally closed-loop input buffer stage that linearizes inverting-input impedance, enabling exceptional bandwidth retention up to G = +10 (>80MHz) and reduced harmonic distortion versus conventional low-power CFB amplifiers. Its transimpedance gain is 700kΩ min (±5V), and inverting input resistance is 5.0Ω typ.

This architecture decouples gain-setting resistor (RG) selection from bandwidth degradation-RF remains fixed at 953Ω for optimal flatness at G = +2-while supporting flexible peaking and summing configurations. The MSOP-10 variant includes dedicated DISA/DISB pins for independent channel shutdown with 40ns enable time and < ±70mV turn-on glitch.

Key Specifications

Pinout & Package

OPA2683IDGSTG4 is housed in a thermally enhanced MSOP-10 (DGS) package with 0.5mm pitch, 3mm × 3mm footprint, and exposed thermal pad for improved power dissipation (θJA = 140°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2683IDGSTG4, the OPA2684IDGST offers higher bandwidth but sacrifices shutdown capability and increases supply current by 32%, while the OPA2691IDGSR trades 2.8× higher power for 2.3× greater bandwidth and slew rate-making OPA2683IDGSTG4 optimal for power-constrained video and DSL applications requiring selective channel disable.

Availability

OPA2683IDGSTG4 is available at Aetrix Electronics and suitable for professional broadcast cameras, short-loop ADSL central office equipment, and differential ADC input stages requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for OPA2683IDGSTG4 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 innovation in precision amplifiers and signal chain solutions.

The OPA2683IDGSTG4 belongs to TI's high-performance CFB amplifier product line, engineered specifically for low-power, wideband video, communications, and test equipment where gain stability, distortion, and supply flexibility are critical.

FAQ

What is the maximum operating supply voltage for OPA2683IDGSTG4?

The OPA2683IDGSTG4 supports a maximum dual-supply voltage of ±6V and a maximum single-supply voltage of +12V. Absolute maximum ratings specify ±6.5V on either supply rail; exceeding these limits risks permanent damage. Operation at ±6V or +12V is fully characterized and supported across the full –40°C to +85°C temperature range, with performance metrics including bandwidth and distortion validated per SBOS244H datasheet conditions.

Does OPA2683IDGSTG4 support true single-supply operation with DC-coupled inputs?

Yes, OPA2683IDGSTG4 supports DC-coupled single-supply operation down to +4V minimum. Its input common-mode range extends to within 1.25V of either rail, and output swings to within 0.9V-enabling direct interfacing with microcontroller DACs or sensor outputs without AC coupling. The datasheet Figure 3 demonstrates a +5V DC-coupled G=+2 configuration using resistive biasing, confirming rail-to-rail usable signal range with no level-shifting components required for OPA2683IDGSTG4.

How does the CFBPLUS architecture in OPA2683IDGSTG4 improve upon standard current-feedback op amps?

The CFBPLUS architecture in OPA2683IDGSTG4 integrates a closed-loop input buffer that linearizes the inverting-input impedance to ~5Ω (vs. highly nonlinear impedance in legacy CFB designs). This yields two key improvements: bandwidth varies <10% from G=+1 to G=+10 (vs. >50% drop in standard CFB), and 2nd-harmonic distortion improves by ≥8dB at 5MHz. These traits make OPA2683IDGSTG4 uniquely suitable for variable-gain video and filter applications where consistent AC response is mandatory.

Can both channels of OPA2683IDGSTG4 be shut down independently?

Yes, OPA2683IDGSTG4 provides fully independent shutdown control via dedicated DISA (Pin 7) and DISB (Pin 9) inputs. Each channel disables with <70mV output glitch and enters a sub-400µA quiescent state while the other channel remains fully operational. This capability is exclusive to the MSOP-10 (DGS) package-SO-8 and SOT23-8 variants lack shutdown pins-and is confirmed in the "DISABLE" section of the SBOS244H datasheet for OPA2683IDGSTG4.

What is the thermal performance of OPA2683IDGSTG4 in MSOP-10 package?

OPA2683IDGSTG4 in MSOP-10 (DGS) package has a junction-to-ambient thermal resistance (θJA) of 140°C/W, measured with standard JEDEC 2-layer board conditions. Its exposed thermal pad must be soldered to a PCB copper pour for rated performance; omitting this reduces effective θJA by ~30%. At 110mA continuous output into 100Ω, power dissipation is ~0.44W per channel, resulting in ≤62°C junction rise above ambient-well within the +150°C absolute maximum rating and supporting reliable operation in enclosed industrial enclosures.