Texas Instruments REF5050AQDRQ1

Overview

REF5050AQDRQ1 from Texas Instruments is an automotive-grade, low-noise, very-low-drift precision voltage reference IC delivering a stable 5.0 V output with ±0.1% initial accuracy, 3 ppm/°C max temperature drift, and 15 µV_PP (0.1–10 Hz) output noise. It sources/sinks ±10 mA and operates from –40°C to +125°C, serving as the primary reference in high-resolution ADCs for automotive sensor signal conditioning.

For engineers reviewing the REF5050AQDRQ1 datasheet, REF5050AQDRQ1 pinout, REF5050AQDRQ1 application, or REF5050AQDRQ1 equivalent, this page provides verified specifications, SOIC-8 package details, automotive-qualified thermal stability data, and real-world design context for 16-bit data acquisition systems requiring AEC-Q100 compliance.

Technical Context

The REF5050AQDRQ1 implements a precision bandgap core with proprietary curvature compensation to achieve 3 ppm/°C typical drift and 0.1% initial accuracy across –40°C to +125°C. Its TRIM/NR pin enables ±15 mV output adjustment or 1 µF-based noise filtering via internal 1 kΩ resistor, while the TEMP pin delivers 575 mV at 25°C with 2.64 mV/°C slope for on-die temperature monitoring.

It features ultra-low dropout (200 mV above VOUT under no load), 1.2 mA max quiescent current over temperature, and robust line/load regulation (≤1 ppm/V and ≤30 ppm/mA). The device lacks shutdown mode and operates only in active state when VIN ≥ VOUT + 0.2 V (min 5.2 V for REF5050AQDRQ1).

Key Specifications

Pinout & Package

REF5050AQDRQ1 is housed in an 8-pin SOIC (D package) with exposed pad for thermal performance. Pin 1 (DNC) and Pin 7 (NC) are unconnected; Pin 3 (TEMP) provides temperature-sensing voltage; Pin 5 (TRIM/NR) enables output trimming or noise reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR4550BRTZ-REEL7 and MAX6126AASA50+, REF5050AQDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 5.0 V output, and 8 ppm/°C max drift in SOIC-8-enabling single-source compliance for automotive Tier 1 suppliers without derating or second-source validation.

Availability

REF5050AQDRQ1 is available at Aetrix Electronics and suitable for automotive sensor modules, high-precision data acquisition systems, and industrial process controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for REF5050AQDRQ1 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 automotive electronics.

The REF50xxA-Q1 family was designed specifically for AEC-Q100-compliant, high-stability voltage references in automotive ADAS, powertrain, and body electronics-prioritizing low drift, low noise, and long-term reliability over cost or feature count.

FAQ

What is the minimum input voltage required for stable operation of the REF5050AQDRQ1?

The REF5050AQDRQ1 requires a minimum input voltage of VOUT + 0.2 V, i.e., 5.2 V, under no-load conditions. At full ±10 mA load, the dropout increases; Figure 6 in the SBOS456H datasheet shows typical dropout versus load. For automotive 5 V rail use, a 5.5 V or higher pre-regulated supply is recommended to ensure margin across temperature and line variation. REF5050AQDRQ1 will not regulate correctly below 5.2 V input.

Can the REF5050AQDRQ1 be used in a negative-reference configuration?

Yes-the REF5050AQDRQ1 can serve as the positive reference in dual-supply configurations when paired with a zero-drift op amp like the OPA735, as shown in Figure 31 of the SBOS456H datasheet. In that circuit, REF5050AQDRQ1 establishes +5.0 V, while the op amp generates a matched –5.0 V rail. The device itself does not generate negative voltage but enables precise bipolar referencing through external active circuitry.

How does the TEMP pin on the REF5050AQDRQ1 function, and what is its accuracy?

The TEMP pin on REF5050AQDRQ1 outputs a voltage proportional to die temperature: V_TEMP = 575 mV + 2.64 mV/°C × T. It has ~60 kΩ output impedance and is accurate to ±15°C-not for precision thermometry, but for relative temperature tracking or coarse compensation. To avoid loading errors, TI recommends buffering it with a low-drift op amp such as the OPA333. REF5050AQDRQ1's TEMP pin is not calibrated per unit and exhibits part-to-part variation within the specified slope tolerance.

Is the TRIM/NR pin on the REF5050AQDRQ1 mandatory to use?

No-the TRIM/NR pin on REF5050AQDRQ1 is optional. Leaving it open maintains nominal 5.0 V output. It serves two functions: (1) applying resistive dividers enables ±15 mV fine adjustment of VOUT, or (2) connecting a 1 µF capacitor to GND creates a 14.5 Hz low-pass filter to reduce broadband noise. Neither function is required for basic operation, but both are validated in TI's application circuits for enhanced performance in noise-sensitive or calibration-critical designs using REF5050AQDRQ1.

What packaging and thermal characteristics apply to the REF5050AQDRQ1?

REF5050AQDRQ1 is supplied in an 8-pin SOIC (D package) with no exposed pad. Its junction-to-ambient thermal resistance (R_θJA) is 107.1°C/W. With 1.2 mA max quiescent current and up to 10 mA load, power dissipation remains low (<60 mW), keeping junction temperature well below the 150°C absolute maximum-even at +125°C ambient-provided standard PCB copper area is used. Thermal hysteresis is specified at 10 ppm max after thermal cycling, confirming stability in automotive thermal environments.