Texas Instruments OPA4872MDREP

Overview

OPA4872MDREP from Texas Instruments is a radiation-hardened, high-speed 4:1 analog multiplexer with integrated gain-setting amplifier, delivering 500-MHz small-signal bandwidth at G = +2 V/V, 0.1-dB gain flatness to 120 MHz, and 10-ns channel-switching time. It operates across –55°C to +125°C in military/aerospace systems requiring video routing, LCD/plasma display signal switching, or high-speed programmable gain amplification.

For engineers reviewing the OPA4872MDREP datasheet, OPA4872MDREP pinout, OPA4872MDREP application, or OPA4872MDREP equivalent, key selection criteria include its 88-dB off-isolation in disable/shutdown mode, ±40 mVPP switching glitch at matched load, 2300-V/µs slew rate, and SO-14 package compatibility with legacy AD8174-based designs.

Technical Context

The OPA4872MDREP implements a patented current-steering input stage within a closed-loop current-feedback architecture, enabling simultaneous wideband operation and low-glitch switching. Its transimpedance open-loop gain (Z_OL) exceeds 92 kΩ at +25°C, supporting stable gain configurations of 1×, 2×, 4×, and 8× via external resistor networks.

Channel selection is controlled by dual logic inputs A0/A1, while independent EN (chip-enable) and SD (shutdown) pins provide hierarchical power management: EN reduces quiescent current to 3.4 mA, SD further lowers it to 1.1 mA. Off-isolation remains 88 dB at 10 MHz in both modes, with output impedance rising to 14 MΩ and capacitance dropping to 2.5 pF.

Key Specifications

Pinout & Package

OPA4872MDREP is housed in an SO-14 (D) package with exposed pad for thermal performance in extended temperature environments. Pin functions are validated per TI SBOS444 datasheet Figure 1 (Top View).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed analog multiplexer applications.

Compared with AD8174ARUZ and THS4521IRGTR, the OPA4872MDREP uniquely integrates 4:1 switching, gain programmability, military temperature rating, and radiation tolerance-making it irreplaceable in defense/aerospace video and radar signal chains where all three attributes are mandatory.

Availability

OPA4872MDREP is available at Aetrix Electronics and suitable for defense avionics, aerospace telemetry, and medical imaging systems requiring stable component supply across extended product lifecycles and extreme environmental conditions.

Supply support for OPA4872MDREP 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 90 years of innovation in high-reliability signal chain solutions.

The OPA4872MDREP belongs to TI's Enhanced Product (EP) line, engineered specifically for defense, aerospace, and medical applications demanding extended temperature operation, radiation tolerance, and long-term supply assurance.

FAQ

What is the maximum operating voltage for OPA4872MDREP?

The OPA4872MDREP supports a specified operating voltage of ±5 V, with a minimum of ±3.5 V and a maximum of ±6.0 V. Exceeding ±6.5 V absolute maximum rating risks permanent damage. The device maintains full AC performance specifications across the ±3.5 V to ±6.0 V range, though quiescent current and bandwidth shift slightly at extremes. For optimal 500-MHz bandwidth and 0.1-dB flatness, ±5 V is recommended per TI SBOS444 test conditions.

How does OPA4872MDREP achieve low switching glitch?

The OPA4872MDREP uses a patented current-steering input stage that maintains closed-loop operation during channel transitions, minimizing transient errors. This architecture results in a typical ±40 mVPP output glitch during channel disable or shutdown at matched load, and ±20 mVPP during active channel selection. Glitch magnitude is independent of signal amplitude and frequency up to 200 MHz, as verified in Figures 13–18 of the SBOS444 datasheet.

Can OPA4872MDREP be used as a standalone programmable gain amplifier?

Yes - the OPA4872MDREP can be configured as a 2-bit high-speed PGA (1×/2×/4×/8×) by connecting external resistors to FB and INx pins, as shown in Figure 28 of SBOS444. Each channel's gain is set independently using resistor networks; for example, IN0 at G = 1×, IN1 at G = 2×, etc. No additional op-amps are needed, and gain switching occurs in 10 ns with consistent 500-MHz bandwidth across all settings.

What is the thermal resistance (θJA) of OPA4872MDREP in SO-14 package?

The OPA4872MDREP in SO-14 (D) package has a junction-to-ambient thermal resistance (θ_JA) of 80 °C/W, measured under standard JEDEC JESD51-2 conditions. This value assumes a 2-layer PCB with 1-in² copper area per side and no internal planes. For sustained operation at +125°C ambient, power dissipation must remain below 625 mW (calculated as (150°C − 125°C)/80 °C/W). Derating is required above 70°C ambient per TI's thermal guidelines.

Does OPA4872MDREP support DC-coupled video signal routing?

Yes - the OPA4872MDREP supports true DC-coupled operation with a common-mode input range of ±2.7 V at +25°C (decreasing to ±2.4 V at +125°C), and output swing of ±3.7 V into 150 Ω. Figure 27 in SBOS444 shows a verified DC-coupled, G = +2 V/V test circuit with 75-Ω input/output termination. Differential gain/phase specs (0.035%/0.005°) are measured on DC-coupled PAL signals, confirming suitability for broadcast and medical imaging video paths.