Texas Instruments REF5025MDTEP

Overview

REF5025MDTEP from Texas Instruments is a military-grade, low-noise, very low-drift precision voltage reference delivering 2.5 V output with ±0.05% initial accuracy, 4–6.5 ppm/°C max temperature drift, 7.5 µV_PP (0.1–10 Hz) noise, and ±10 mA sourcing/sinking capability. It operates from –55°C to +125°C in high-reliability data acquisition and instrumentation systems requiring stable excitation for 16-bit ADCs.

For engineers reviewing the REF5025MDTEP datasheet, REF5025MDTEP pinout, REF5025MDTEP application, or REF5025MDTEP equivalent, this page delivers verified specifications, SOIC-8 package mapping, TRIM/NR noise-filtering guidance, TEMP pin temperature monitoring behavior, and validated alternatives for ruggedized analog signal chains.

Technical Context

The REF5025MDTEP implements a proprietary bandgap core with buffered output amplifier, enabling bidirectional current flow (±10 mA) and robust line/load regulation (≤1 ppm/V, ≤30 ppm/mA). Its internal TRIM/NR pin provides direct access to the bandgap node for external RC filtering-adding 1 µF reduces 0.1–10 Hz noise by 50% via a ~15 Hz low-pass pole.

Temperature monitoring is implemented via the TEMP pin (pin 3), delivering 575 mV at 25°C with 2.64 mV/°C slope and ~60 kΩ source impedance; buffering with a low-drift op amp (e.g., OPA335) is required for accurate readout. The device requires 1–50 µF output capacitance (ESR 1–1.5 Ω) and 1–10 µF input bypass for stability across its –55°C to +125°C operating range.

Key Specifications

Pinout & Package

REF5025MDTEP is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body) with exposed pad option per MDTEP suffix, rated for –55°C to +125°C operation and controlled baseline manufacturing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF5025MDTEP, REF5025IDR offers identical performance at lower cost but no military qualification, while ADR4525BRTZ-REEL7 delivers better noise and drift yet sacrifices drive strength and temperature telemetry - making REF5025MDTEP optimal for ruggedized, thermally aware systems needing full ±10 mA capability.

Availability

REF5025MDTEP is available at Aetrix Electronics and suitable for 16-bit data acquisition systems, industrial process controllers, medical instrumentation, and optical control systems requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for REF5025MDTEP 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 precision analog ICs and high-reliability components.

The REF50xx family-including REF5025MDTEP-is designed specifically for high-accuracy, low-drift voltage referencing in demanding data acquisition, test equipment, and aerospace applications where long-term stability and wide-temperature operation are mandatory.

FAQ

What is the maximum operating temperature for REF5025MDTEP?

The REF5025MDTEP is fully specified from –55°C to +125°C, with absolute maximum junction temperature of 150°C. Its SOIC-8 package with exposed pad (MDTEP suffix) supports reliable thermal dissipation in sealed enclosures and high-ambient environments such as downhole tools or avionics bays. All electrical parameters-including drift, noise, and load regulation-are guaranteed across this full range.

Can REF5025MDTEP drive a 10 µF output capacitor directly?

Yes, REF5025MDTEP is designed to operate stably with output capacitance from 1 µF to 50 µF, provided the capacitor's ESR is between 1 Ω and 1.5 Ω. A 10 µF ceramic capacitor is acceptable if its ESR falls within that range; otherwise, a series resistor may be needed. TI's datasheet Figure 28 and Table 1 confirm stable operation with 10 µF loads in typical data acquisition configurations.

How does the TRIM/NR pin reduce noise in REF5025MDTEP?

The TRIM/NR pin (Pin 5) connects directly to the internal bandgap node. Adding a 1 µF capacitor from TRIM/NR to GND forms a low-pass filter with the internal resistors, creating a corner frequency near 15 Hz. This attenuates 0.1–10 Hz bandgap noise by ~21 dB - reducing REF5025MDTEP's measured 0.1–10 Hz noise from 7.5 µV_PP to ~3.75 µV_PP, as verified in Figure 13 of SBOS471B.

Is the TEMP pin on REF5025MDTEP suitable for accurate temperature measurement?

No - the TEMP pin provides a nominal 575 mV at 25°C with 2.64 mV/°C slope and ±15°C accuracy, intended for relative temperature tracking or coarse compensation-not precision sensing. Its ~60 kΩ source impedance requires buffering (e.g., with OPA335) before ADC sampling. For accurate measurement, use a dedicated temperature sensor; for thermal margin monitoring, REF5025MDTEP's TEMP pin suffices.

What is the minimum input voltage required for REF5025MDTEP to regulate properly?

REF5025MDTEP requires VIN ≥ 2.7 V (not VOUT + 0.2 V) due to its 2.5 V output, per Note (1) in Section 6.5 of SBOS471B. Below 2.7 V, regulation fails and VOUT drops nonlinearly. At 2.7 V input, dropout is 0.2 V - sufficient for 3.3 V rail operation with margin. Input must not exceed 18 V to avoid damage per Absolute Maximum Ratings.