Texas Instruments REF6230IDGKT

Overview

REF6230IDGKT from Texas Instruments is a high-precision, 3.0 V voltage reference IC with integrated ADC drive buffer, ±0.05% initial accuracy, 3 ppm/°C max temperature drift (0°C to +70°C), 5 µVRMS total noise (with 47-µF capacitor), and <50 mΩ output impedance (DC–200 kHz). It drives the REF pin of precision SAR ADCs like ADS8881 in burst-mode data acquisition systems.

For engineers reviewing the REF6230IDGKT datasheet, REF6230IDGKT pinout, REF6230IDGKT application, or REF6230IDGKT equivalent, this page delivers verified specifications, real-world droop performance vs. ADS8881, buffer-enabled first-sample 18-bit precision, and validated alternatives for test & measurement, PLC analog input, and medical DAQ designs.

Technical Context

The REF6230IDGKT integrates a low-drift bandgap core with a high-bandwidth, low-output-impedance buffer optimized for dynamic ADC reference loads. Its architecture supports direct connection to the REF pin of SAR and delta-sigma converters-including ADS88xx and ADS127xx families-without external buffering.

It features programmable short-circuit current via the SS pin, dual ground pins (GND_F/GND_S) for force-sense separation, and FILT pin for stability-enhancing ≥1 µF capacitor. The device maintains ≤1 LSB droop during the first conversion at 1 MSPS with ADS8881, enabling event-triggered and variable-rate sampling.

Key Specifications

Pinout & Package

REF6230IDGKT is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained PCB layouts in precision instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF6225IDGKT and REF6241IDGKT, REF6230IDGKT provides optimal 3.0 V output for modern 18-bit SAR ADCs like ADS8881-matching their native full-scale range while delivering identical low-drift, low-noise, and buffer-driven performance.

Availability

REF6230IDGKT is available at Aetrix Electronics and suitable for test and measurement equipment, PLC analog input modules, and medical data acquisition systems requiring stable component supply, long-term calibration integrity, and guaranteed 18-bit first-sample accuracy.

Supply support for REF6230IDGKT 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 leadership in precision voltage references and data converter ecosystems.

The REF62xx family was designed specifically to solve dynamic reference loading challenges in high-resolution data acquisition-enabling direct, buffer-integrated drive of SAR and delta-sigma ADC REF pins without performance compromise.

FAQ

What is the output voltage of REF6230IDGKT?

The REF6230IDGKT provides a precise 3.0 V nominal output voltage. This value is factory-trimmed to ±0.05% initial accuracy and maintains stability over temperature (3 ppm/°C max from 0°C to +70°C) and load (±4 mA). Its 3.0 V output is optimized for 18-bit SAR ADCs such as the ADS8881, where it maps directly to full-scale code range without scaling resistors or gain stages.

How does REF6230IDGKT achieve first-sample 18-bit precision with ADS8881?

The REF6230IDGKT achieves ≤1 LSB droop on the first conversion at 1 MSPS with ADS8881 by combining an ultra-low-output-impedance buffer (<50 mΩ up to 200 kHz) and optimized internal compensation. Measured droop is <19.07 µV (1 LSB at 18 bits) within 1 µs after conversion start-verified via FPGA-averaged ADC code analysis per TI SBOS748 Figure 43–44.

What is the purpose of the FILT pin on REF6230IDGKT?

On the REF6230IDGKT, the FILT pin connects to a ≥1 µF capacitor to ground (GND_F) to stabilize the internal regulator and suppress high-frequency noise. This capacitor reduces output impedance at higher frequencies and improves PSRR above 10 kHz. Omitting or undersizing CFILT risks instability, increased noise, and degraded droop performance during fast ADC switching events.

Can REF6230IDGKT drive other ADC families besides ADS88xx?

Yes-REF6230IDGKT is verified to drive the REF pins of both ADS88xx SAR ADCs and ADS127xx wideband delta-sigma ADCs (e.g., ADS127L01). Its 3 ppm/°C drift, 5 µVRMS noise, and ±4 mA drive capability meet the stringent dynamic load requirements of these families. It is not qualified for non-TI ADCs unless independently validated per application conditions.

What are the recommended operating conditions for REF6230IDGKT?

REF6230IDGKT requires VIN ≥ VOUT + 0.25 V (i.e., ≥3.25 V) and ≤5.5 V, operates from 0°C to +70°C, and draws 0.82–0.90 mA in active mode. Load regulation is specified at ±20 ppm/mA (25°C), and stable operation requires CL ≥10 µF (typical 47 µF) and CFILT ≥1 µF. EN must be pulled ≥1.6 V for activation and ≤0.6 V for shutdown.