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Texas Instruments REF6233IDGKT
- Part No.:
- REF6233IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REF6233IDGKT.pdf
- Description:
- IC VREF SERIES 0.05% 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,296
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Product details
Overview
REF6233IDGKT from Texas Instruments is a high-precision, 3.3 V voltage reference with integrated ADC drive buffer, designed to directly drive the REF pin of SAR and delta-sigma ADCs such as ADS8881 and ADS127L01. It delivers ±0.05% initial accuracy, 3 ppm/°C max temperature drift (0°C to +70°C), <50 mΩ output impedance (DC–200 kHz), and enables first-sample precision to 18 bits in burst-mode data acquisition systems.
For engineers reviewing the REF6233IDGKT datasheet, REF6233IDGKT pinout, REF6233IDGKT application, or REF6233IDGKT equivalent, this page provides verified specifications, functional pin mapping, real-world droop performance with ADS8881, noise and distortion metrics (5 µVRMS total noise, SNR = 99 dB), and validated alternatives for precision data converter reference design.
Technical Context
The REF6233IDGKT integrates a low-drift bandgap core with a high-bandwidth, low-output-impedance buffer optimized for dynamic ADC reference loading. Its dual-ground architecture (GND_F/GND_S) separates force and sense paths to minimize PCB layout-induced errors during high-current transients.
It features programmable short-circuit current via the SS pin, supports stable operation with 10–47 µF output capacitors, and maintains ≤1 LSB droop at 1 MSPS when driving the ADS8881 REF pin - a capability confirmed by direct ADC code averaging under full-scale input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal; precisely matches ADS88xx/ADS127xx REF input requirements without external scaling. |
| Initial Accuracy | ±0.05%; ensures ≤1 LSB error at 18-bit resolution (1 LSB = 12.7 µV) without calibration. |
| Temp Drift | 3 ppm/°C max (0°C to +70°C); guarantees <22 ppm total drift across industrial ambient range. |
| Output Impedance | <50 mΩ (DC–200 kHz); sustains fast settling and minimal droop during ADC capacitor switching events. |
| Total Noise | 5 µVRMS (with 47 µF CL); contributes <0.3 LSB RMS noise to 18-bit system noise budget. |
| Supply Current | 0.82–0.90 mA active; enables low-power portable and battery-backed precision DAQ designs. |
| Short-Circuit Limit | Programmable via SS pin; default 10.5 mA (SS open) protects against REF pin fault currents. |
Pinout & Package
REF6233IDGKT is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained precision analog layouts with thermal and grounding integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power supply input | Accepts 3.55 V to 5.5 V; dropout voltage ≤250 mV at 4 mA load ensures compatibility with 3.3 V LDO rails. |
| EN | Enable control input | Active-high logic; pulls device into 1 µA shutdown mode when low, enabling power-gated reference sequencing. |
| SS | Short-circuit current limit | Resistor-programmable output current limit; connects to VIN for maximum 10.5 mA default setting. |
| FILT | Filter capacitor connection | Requires ≥1 µF capacitor to GND for internal stability; decouples high-frequency noise from buffer feedback path. |
| OUT_S | Output voltage sense | High-impedance feedback node; connects to ADC REF pin to close precision regulation loop. |
| OUT_F | Output voltage force | Low-impedance buffered output; drives dynamic ADC REF load while isolating sense path from PCB IR drop. |
| GND_F | Force ground | Return path for OUT_F; must be routed separately from signal ground to avoid forcing error into sense path. |
| GND_S | Sense ground | Return path for OUT_S and internal reference; ties to clean ADC ground plane to preserve measurement accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ADC drive buffer | Eliminates need for external op-amp; reduces BOM count and layout sensitivity in high-resolution DAQ systems. |
| First-sample 18-bit precision | Validated with ADS8881 at 1 MSPS; ensures accurate event-triggered capture without post-acquisition correction. |
| Burst-mode DAQ support | Enables low-duty-cycle operation where reference is powered only during acquisition windows, cutting system power. |
| Dual-ground architecture | Separates force/sense grounds to reject PCB trace resistance errors-critical for sub-LSB accuracy at ±4 mA load. |
| Low 1/f noise | 3 µVPP/V (0.1 Hz–10 Hz); minimizes drift-induced errors in slow-sampling applications like sensor calibration. |
Applications
| ATE Testers and Oscilloscopes | Test and Measurement Equipment |
|---|---|
Use Scenario: High-speed automated test equipment capturing transient waveforms at 1 MSPS with 18-bit resolution. IC Role / Device Role / Timing Role: Supplies ultra-stable 3.3 V reference to ADS8881 SAR ADC during burst sampling triggered by external events. Use Value: Enables first-sample accuracy within 1 LSB without calibration, reducing test time and improving pass/fail confidence. |
Use Scenario: Portable multimeter or calibrator requiring stable DC reference over 0°C–70°C ambient range. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric DAC/ADC pairs in metrology-grade front ends. Use Value: 3 ppm/°C drift and ±0.05% accuracy eliminate mid-range recalibration, extending field service intervals. |
| Analog Input Modules for PLCs | Medical Equipment |
Use Scenario: Industrial PLC I/O module digitizing 4–20 mA sensor signals with 16+ bit resolution and cold-junction compensation. IC Role / Device Role / Timing Role: Reference for simultaneous-sampling delta-sigma ADCs (e.g., ADS127L01) in multi-channel isolation stages. Use Value: Low 5 µVRMS noise and 106 dB SNR ensure >100 dB effective number of bits (ENOB) in noisy factory environments. |
Use Scenario: Patient monitoring device acquiring ECG or EEG signals with low-noise, low-power front end. IC Role / Device Role / Timing Role: Low-quiescent-current (820 µA) reference for battery-powered ADC subsystems with sleep/wake cycles. Use Value: 1 µA shutdown current extends battery life; integrated buffer avoids external components that increase leakage risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF6230IDGKT | 3.0 V output; identical drift (3 ppm/°C), accuracy (±0.05%), and buffer specs. | Used where 3.0 V ADC reference is required (e.g., 3 V rail systems, specific SAR ADC families). | Select when system-level voltage scaling or ADC datasheet mandates 3.0 V REF instead of 3.3 V. |
| REF6241IDGKT | 4.096 V output; same 3 ppm/°C drift and buffer performance; higher dropout voltage (250 mV @ 4 mA). | Preferred for 12-/16-bit systems using standard 4.096 V references or legacy DACs with 4 V full-scale ranges. | Choose for compatibility with existing 4.096 V-based designs or when higher output voltage improves SNR margin. |
Compared with REF6233IDGKT, REF6230IDGKT offers identical precision at 3.0 V for lower-voltage ADC interfaces, while REF6241IDGKT provides 4.096 V output for legacy-compatible or higher-SNR applications-neither requires PCB redesign but addresses distinct voltage-scaling needs.
Availability
REF6233IDGKT is available at Aetrix Electronics and suitable for precision data acquisition systems, automated test equipment, and medical instrumentation requiring stable component supply, guaranteed long-term availability, and traceable sourcing.
Supply support for REF6233IDGKT 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 REF62xx family was engineered specifically to solve dynamic reference droop in high-speed precision ADCs-enabling true 18-bit first-sample accuracy without external buffering or complex layout mitigation.
FAQ
What is the output voltage tolerance and temperature coefficient of REF6233IDGKT?
The REF6233IDGKT has a nominal output voltage of 3.3 V with ±0.05% initial accuracy and a maximum temperature coefficient of 3 ppm/°C over 0°C to +70°C. These values are specified for both the reference core and integrated buffer combined, ensuring end-to-end precision without additional error budgeting for the buffer stage.
How does REF6233IDGKT achieve first-sample 18-bit accuracy with ADS8881?
The REF6233IDGKT achieves first-sample 18-bit accuracy with ADS8881 by combining ultra-low output impedance (<50 mΩ up to 200 kHz) and optimized transient response. When driving the ADS8881 REF pin at 1 MSPS, its reference droop remains below 1 LSB (19.07 µV), as validated by ADC code averaging under full-scale input conditions per TI SBOS748.
Can REF6233IDGKT drive other ADC families besides ADS88xx and ADS127xx?
Yes, REF6233IDGKT is verified to drive the REF pins of ADS88xx SAR ADCs and ADS127xx wideband delta-sigma ADCs, but its low output impedance and low noise also make it suitable for precision DACs and other converters requiring ≤±4 mA dynamic load and ≤1 LSB droop. Always verify load capacitance and transient current profile against datasheet recommendations.
What is the purpose of the dual-ground (GND_F and GND_S) pins on REF6233IDGKT?
GND_F (force ground) carries return current from the buffered output (OUT_F), while GND_S (sense ground) serves as the quiet reference return for the internal bandgap and OUT_S feedback path. Separating these grounds prevents PCB trace resistance from introducing error into the regulated output voltage-essential for maintaining sub-LSB accuracy at full ±4 mA load.
Does REF6233IDGKT require external components for stability?
Yes, REF6233IDGKT requires a minimum 1 µF capacitor between FILT and GND for internal stability, and a 10–47 µF output capacitor (CL) between OUT_F and GND_F. The datasheet specifies 47 µF for optimal noise and droop performance. No series resistor or ferrite bead is needed-the integrated buffer eliminates typical external compensation requirements.
REF6233IDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 4 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.55V ~ 5.5V
- Current - Supply:
- 1.1mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
REF6233IDGKT FAQ
1.How can I place an order for REF6233IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF6233IDGKT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for REF6233IDGKT reliable?
The price and inventory of REF6233IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF6233IDGKT is usually 5 days.
3.What payment methods are accepted for REF6233IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF6233IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF6233IDGKT?
REF6233IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF6233IDGKT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for REF6233IDGKT?
For technical support, including REF6233IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF6233IDGKT requirements.
6.How does Aetrix verify that REF6233IDGKT is sourced from the original manufacturer or authorized distributors?
All REF6233IDGKT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that REF6233IDGKT meets industry standards.
7.What is the process for return or replacement of REF6233IDGKT?
All REF6233IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with REF6233IDGKT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The REF6233IDGKT part is unused and in its original packaging.
Return procedure for REF6233IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF6233IDGKT Tags
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