Texas Instruments OPA890IDBVT

Overview

OPA890IDBVT from Texas Instruments is a unity-gain stable, voltage-feedback operational amplifier optimized for wideband, low-power applications. It delivers 115MHz small-signal bandwidth (G = +2V/V), 500V/μs slew rate, ±4V output swing on ±5V supplies, and features an enable/disable control pin. It serves as a high-speed ADC input driver or RGB line driver in portable instrumentation and video systems.

For engineers reviewing the OPA890IDBVT datasheet, OPA890IDBVT pinout, OPA890IDBVT application, or OPA890IDBVT equivalent, key selection criteria include its 1.1mA quiescent current, 70dB off-isolation during disable, 4pF output capacitance in shutdown, and SOT23-6 package compatibility with space-constrained signal-chain designs.

Technical Context

The OPA890IDBVT employs a novel transconductance-based input stage that dynamically increases compensation capacitor charging current with input error voltage-enabling 500V/μs slew rate while maintaining only 1.1mA supply current. This architecture avoids fixed-bias current steering limitations typical of conventional voltage-feedback op amps.

Its disable function asserts a high-impedance output state with <30μA supply current and 7μs disable time, while enabling fast 200ns wake-up. The device maintains >60dB CMRR and PSRR up to 1MHz, supporting precision DC-coupled and AC-coupled configurations across ±1.5V to ±6V or +3V to +12V supplies.

Key Specifications

Pinout & Package

SOT23-6 package (DBV) with 1.6mm × 2.9mm footprint, 0.95mm height, and 0.95mm lead pitch-designed for high-density PCB layouts in handheld test equipment and compact data acquisition modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2890IDGKT and LMH6629MA/NOPB, the OPA890IDBVT uniquely combines unity-gain stability, 1.1mA supply current, and SOT23-6 size-making it the only option for space-constrained, low-power, single-channel wideband buffering where gain flexibility and shutdown control are mandatory.

Availability

OPA890IDBVT is available at Aetrix Electronics and suitable for video line driving, xDSL line drivers/receivers, and ADC buffers requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for OPA890IDBVT 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 over 50 years of innovation in high-performance op amps and signal-chain solutions.

The OPA890 belongs to TI's precision wideband op amp product line, engineered specifically for low-power, high-fidelity signal conditioning in portable instrumentation, communications infrastructure, and video systems.

FAQ

What supply voltage ranges does the OPA890IDBVT support?

The OPA890IDBVT operates from +3V to +12V single supply or ±1.5V to ±6V dual supplies. At +5V single supply, it delivers 105MHz bandwidth and 350V/μs slew rate; at ±5V, it achieves 115MHz and 500V/μs. Absolute maximum ratings cap at ±6.5V supply, ensuring robustness in transient-prone environments. The OPA890IDBVT maintains specified performance across its full –40°C to +85°C operating range under these conditions.

How does the disable function affect output behavior in the OPA890IDBVT?

When the DIS pin is pulled LOW, the OPA890IDBVT enters power-down mode with <30μA supply current and its output transitions to a high-impedance state within 7μs. Output capacitance drops to 4pF, minimizing loading on shared signal buses. The amplifier resumes normal operation within 200ns after DIS returns HIGH. This behavior is fully characterized and guaranteed across temperature-no external pull-up is required as the internal enable threshold is 3.0V min (enable) and 1.4V max (disable).

Can the OPA890IDBVT drive 75Ω video loads while maintaining differential phase accuracy?

Yes-the OPA890IDBVT delivers 0.05% differential gain and 0.03° differential phase error when driving 150Ω loads at 1.4VPP (standard video test condition), and maintains <0.1% gain error into 75Ω with proper termination. Its 115MHz bandwidth and –88dBc 2nd-harmonic distortion at 1MHz ensure broadcast-compliant performance. Layout best practices-such as 50Ω source matching and 0.1μF supply pin decoupling-are essential to replicate these results in production designs using the OPA890IDBVT.

What is the input common-mode voltage range for the OPA890IDBVT on a +5V supply?

On a +5V single supply, the OPA890IDBVT supports an input common-mode voltage range from +1.0V to +4.0V (min/max over temperature), centered at VS/2 = +2.5V. This allows direct interfacing with 1.8V or 3.3V logic-driven sources when biased appropriately, and accommodates 2VPP input signals without clipping. The 65dB CMRR at +25°C ensures rejection of supply-related noise-critical for mixed-signal systems where the OPA890IDBVT conditions ADC inputs alongside digital controllers.

Is the OPA890IDBVT unity-gain stable with capacitive loads?

Yes-the OPA890IDBVT is unity-gain stable into purely resistive loads and remains stable with moderate capacitive loads (<100pF) when using the recommended 750Ω feedback resistor and proper PCB layout. Figure 15 in the SBOS369B datasheet specifies RS ≥ 10Ω for CL = 100pF to maintain phase margin >45°. For heavier capacitive loads (e.g., LCD panel traces), a small series resistor (10–22Ω) at the output is advised. This stability holds across all supply voltages and temperatures for the OPA890IDBVT.