Texas Instruments OPA2830IDGKT

Overview

OPA2830IDGKT from Texas Instruments is a dual, low-power, single-supply, wideband voltage-feedback operational amplifier optimized for 3V–5V ADC input buffering and video line driving. It delivers 230MHz bandwidth at G=+1, 500V/μs slew rate, 9.2nV/√Hz input voltage noise, and rail-to-rail output swing within 25mV of either supply on 5V operation.

For engineers reviewing the OPA2830IDGKT datasheet, OPA2830IDGKT pinout, OPA2830IDGKT application, or OPA2830IDGKT equivalent, key selection criteria include single-supply 3V–11V operation, ground-sensing input range, ±75mA output drive, low distortion at high frequencies, and VSSOP-8 thermal performance in portable and imaging systems.

Technical Context

The OPA2830IDGKT uses complementary common-emitter output stage architecture to achieve rail-to-rail output swing (±4.72V on 5V supply into 150Ω) while maintaining high-speed settling (65ns to 0.1% at G=+2). Its voltage-feedback topology supports stable operation with gain ≥ +1 and exhibits peaking-free response up to 100MHz at G=+2.

Input stage design enables operation with input common-mode voltage extending to ground on single supply and within 1.8V of V_S+, supporting DC-coupled interfaces to CMOS ADCs and CCD sensors. Distortion performance improves at lower signal swings, a behavior confirmed across 3V, 5V, and ±5V supply conditions.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3mm × 3mm body, 0.65mm pitch, thin-profile surface-mount with exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2830IDGKT, the OPA2832IDGKT trades gain flexibility for enhanced PSRR and linearity at fixed gain, while the LMH6629MA/NOPB provides significantly higher bandwidth at the cost of power and package compatibility-making OPA2830IDGKT the balanced choice for portable, wideband, single-supply precision signal conditioning.

Availability

OPA2830IDGKT is available at Aetrix Electronics and suitable for single-supply ADC buffering, CCD imaging channel amplification, and portable ultrasound front-end designs requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for OPA2830IDGKT 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 OPA2830IDGKT belongs to TI's precision wideband op-amp product line, engineered specifically for low-power, single-supply, high-fidelity signal acquisition in portable instrumentation, medical imaging, and consumer video systems.

FAQ

What supply voltage ranges does the OPA2830IDGKT support?

The OPA2830IDGKT operates from 3V to 11V on single supply or ±1.5V to ±5.5V on dual supply. At 5V single supply, it draws 8.8mA quiescent current and delivers ±4.72V output swing into 150Ω. The input common-mode range extends to ground, enabling direct interface with grounded sensors and DACs without level-shifting circuitry.

Does the OPA2830IDGKT support rail-to-rail output swing?

Yes, the OPA2830IDGKT achieves rail-to-rail output swing within 25mV of either supply rail when driving 150Ω loads. On a 5V supply, it delivers ±4.72V output (4.82V_PP) into 150Ω, meeting requirements for driving 5V ADC inputs and 75Ω video lines. This is enabled by its complementary common-emitter output stage, confirmed in the datasheet's Electrical Characteristics tables.

What is the small-signal bandwidth of the OPA2830IDGKT at unity gain?

The OPA2830IDGKT delivers 230MHz small-signal bandwidth at G=+1 under 5V supply conditions (VO ≤ 0.2V_PP). This specification is measured with RF = 750Ω and RL = 150Ω to ground, and is validated across temperature and process corners per Section 6.6 of the SBOS309E datasheet. Bandwidth reduces to 100MHz at G=+2 and 21MHz at G=+10.

How does harmonic distortion behave across output signal amplitude for the OPA2830IDGKT?

Unlike many wideband op-amps, the OPA2830IDGKT exhibits improved harmonic distortion performance as output signal amplitude decreases. At 5MHz, 2nd-harmonic distortion improves from –52dBc at 2V_PP to –59dBc at 1V_PP (RL ≥ 500Ω), a behavior explicitly documented in Figure 6-30 and Section 6.6. This makes it especially effective in variable-gain medical and industrial front-ends where signal levels vary dynamically.

Is the OPA2830IDGKT pin-compatible with other devices in the OPA28xx family?

The OPA2830IDGKT shares the same VSSOP-8 (DGK) pinout with OPA2832IDGKT, including identical terminal assignments for VS+, VS−, VOUT1, VOUT2, and all four inputs. However, internal compensation differs: OPA2830IDGKT is unity-gain stable, while OPA2832IDGKT is optimized for G=+2. No PCB changes are required when substituting between these two, but gain-setting network adjustments may be needed for stability.