Texas Instruments REF6130IDGKR

Overview

REF6130IDGKR from Texas Instruments is a high-precision, 3.0 V voltage reference IC with integrated low-output-impedance ADC drive buffer, ±0.05% initial accuracy, 8 ppm/°C max temperature drift (–40°C to +125°C), and 5 µV_RMS total noise (with 47 µF capacitor). It is engineered to directly drive the REF pin of precision SAR ADCs like the ADS8881 in burst-mode data acquisition systems.

For engineers reviewing the REF6130IDGKR datasheet, REF6130IDGKR pinout, REF6130IDGKR application, or REF6130IDGKR equivalent, this page delivers verified specifications, functional pin definitions, real-world droop performance data, and validated alternatives for precision analog signal chains requiring first-sample 18-bit accuracy.

Technical Context

The REF6130IDGKR implements a bandgap voltage reference core paired with a unity-gain, rail-to-rail output buffer optimized for dynamic load transients - specifically the capacitive switching of SAR ADC reference inputs. Its dual-ground architecture (GND_F/GND_S) separates force and sense paths to minimize PCB trace resistance effects on output regulation.

It features programmable short-circuit current via the SS pin, supports stable operation with 10–47 µF output capacitance, and maintains <50 mΩ output impedance up to 200 kHz - enabling precise settling during the first conversion cycle of high-speed ADCs such as ADS8881 at 1 MSPS.

Key Specifications

Pinout & Package

REF6130IDGKR is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained PCB layouts while maintaining thermal performance (R_θJA = 158.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF6130IDGKR, REF6133IDGKR offers identical performance at 3.3 V for different ADC families, while REF6230IDGKR trades integrated buffering and wide-temp capability for lower drift in ambient-limited environments - making REF6130IDGKR optimal for industrial burst-mode DAQ where 3.0 V, full-temp stability, and buffer integration are mandatory.

Availability

REF6130IDGKR is available at Aetrix Electronics and suitable for precision data acquisition systems, automated test equipment, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for REF6130IDGKR 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 voltage references and data converter ecosystems.

The REF61xx family was designed specifically to solve dynamic reference droop in high-speed SAR ADC applications - combining bandgap stability, low-noise buffering, and programmable fault protection in a single IC for test, measurement, and industrial DAQ.

FAQ

What is the output voltage of the REF6130IDGKR?

The REF6130IDGKR provides a precise 3.0 V nominal output voltage, specified with ±0.05% initial accuracy at 25°C and maintained within 8 ppm/°C over –40°C to +125°C. This fixed 3.0 V output is optimized for direct interfacing with 3-V-input precision SAR ADCs such as the ADS8881, eliminating the need for external scaling circuitry and preserving end-to-end linearity.

How does the REF6130IDGKR reduce reference droop during ADC conversion?

The REF6130IDGKR integrates a low-output-impedance buffer (<50 mΩ up to 200 kHz) that actively drives the dynamic capacitive load of SAR ADC reference pins. When driving the ADS8881 at 1 MSPS, REF6130IDGKR limits reference droop to less than 1 LSB (19.07 µV), ensuring first-sample precision meets 18-bit requirements - a capability confirmed in TI's SBOS747B datasheet Figure 32 through 34.

What are the recommended operating conditions for REF6130IDGKR?

REF6130IDGKR operates with VIN from 3.25 V to 5.5 V (VOUT + 0.25 V minimum), supplies up to ±4 mA output current, and functions across –40°C to +125°C. It requires a ≥1 µF capacitor on FILT and 10–47 µF on OUT_F for stability. The EN pin accepts 0–VIN logic levels, and SS pin can be left open for 10.5 mA short-circuit limit or resistor-programmed for lower values.

Can REF6130IDGKR drive the REF pin of ADS127L01?

Yes, REF6130IDGKR is explicitly verified by Texas Instruments to drive the REF pin of both ADS88xx SAR ADCs and ADS127xx wideband delta-sigma ADCs including the ADS127L01. Its low output impedance and low noise (5 µV_RMS) support 106 dB SNR and –120 dB THD performance with ADS127L01, as documented in the REF61xx family datasheet Feature section.

What is the purpose of the dual-ground (GND_F and GND_S) pins on REF6130IDGKR?

GND_F serves as the return path for the buffered output current (OUT_F), while GND_S provides the reference ground for the output sense input (OUT_S). This Kelvin-style separation rejects voltage drops across PCB traces between the device and load, improving DC accuracy and long-term stability - especially critical in high-precision, low-drift applications where trace resistance could otherwise introduce measurable error.