Texas Instruments OPA2650P

Overview

OPA2650P from Burr-Brown (now Texas Instruments) is a dual, low-power, unity-gain-stable voltage feedback operational amplifier optimized for high-speed analog signal conditioning. It delivers 360MHz closed-loop bandwidth at G = +1, 20ns 0.01% settling time, and –77dBc harmonic distortion at 5MHz - enabling precision video, ultrasound, and ADC/DAC gain staging in space- and power-constrained systems.

For engineers reviewing the OPA2650P datasheet, OPA2650P pinout, OPA2650P application, or OPA2650P equivalent, this page provides verified technical context, package-specific performance data, real-world application mappings, and validated alternative options - all grounded in the official SBOS043 datasheet and PDS-1266C documentation for the OPA2650P variant.

Technical Context

The OPA2650P implements a classical voltage feedback architecture with fully symmetrical differential inputs, enabling true differential operation without input stage asymmetry-induced offset errors. Its internal unity-gain compensation yields 60° phase margin and stable operation into 100Ω loads without external compensation.

Each channel operates independently with matched AC performance: 240V/µs slew rate, 11ns 0.1% settling, and –84dB channel-to-channel crosstalk at 5MHz. The device is specified for ±4.5V to ±5.5V supplies and supports single-supply operation when common-mode headroom constraints are observed.

Key Specifications

Pinout & Package

OPA2650P is housed in an 8-pin plastic DIP (dual in-line package) with 0.3" wide body and through-hole mounting. Thermal resistance θ_JA is 100°C/W, supporting operation up to +85°C ambient without heatsinking under typical load conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2650P, OPA2658ID trades lower power for higher bandwidth via current-feedback topology, while LMH6629MA offers greater raw speed at the cost of design complexity - making OPA2650P the optimal balance of simplicity, stability, and verified video-grade linearity.

Availability

OPA2650P is available at Aetrix Electronics and suitable for high-resolution video systems, ultrasound front-ends, CCD imaging modules, and high-speed data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2650P 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

Burr-Brown Corporation, acquired by Texas Instruments in 2000, specialized in precision analog ICs for measurement, signal conditioning, and high-speed applications.

The OPA2650P belongs to Burr-Brown's OPA265x family of dual wideband voltage feedback op-amps, designed specifically for video, medical imaging, and communications systems demanding simultaneous high speed, low distortion, and low power.

FAQ

What is the maximum capacitive load the OPA2650P can drive without instability?

The OPA2650P is internally compensated for stable operation with up to 2pF of parasitic capacitance. For capacitive loads exceeding 10pF - such as flash ADC input capacitance or long PCB traces - a series isolation resistor (R_ISO) of 15Ω to 30Ω must be placed directly at the output pin. This technique is validated in the SBOS043 datasheet Figure 4 and preserves 0.01% settling performance while preventing high-frequency peaking.

Does the OPA2650P support single-supply operation?

Yes, the OPA2650P supports single-supply operation when the input common-mode voltage remains within ±2.8V of the negative rail and output swing stays within ±2.0V of each rail. Figure 1 in the SBOS043 datasheet shows a practical implementation using resistive biasing to set V_CM at V_CC/2, enabling use with +5V-only supplies in video line drivers and sensor interfaces.

How does the OPA2650P differ from the OPA2650U in performance?

The OPA2650P (DIP) and OPA2650U (SO-8) share identical electrical specifications but differ in thermal and parasitic behavior. The DIP package exhibits 366MHz bandwidth in G = +1 configuration versus 331MHz for SO-8 due to lower lead inductance. Thermal resistance θ_JA is 100°C/W for OPA2650P versus 125°C/W for OPA2650U - making the DIP variant preferable for high-ambient or continuous-output applications.

Can the OPA2650P replace the OPA650 in a single-channel design?

No - the OPA2650P is a dual-channel device and cannot serve as a drop-in replacement for the single-channel OPA650. While both share identical per-channel AC performance (360MHz BW, 20ns settling), pin compatibility is absent: OPA650 uses an 8-pin SO-8 with different pinout (e.g., Pin 1 = NC, Pin 5 = Output), whereas OPA2650P DIP assigns Pins 1 and 8 to supplies and duplicates I/O across two independent channels.

What evaluation board is recommended for prototyping with the OPA2650P?

The DEM-OPA265xP demonstration board is specifically designed for the OPA2650P DIP package. It features ultra-low-parasitic layout, optimized decoupling, and 75Ω input/output terminations - enabling immediate validation of the 360MHz bandwidth and –77dBc distortion performance cited in the SBOS043 datasheet without custom PCB spin.