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Texas Instruments REF6250IDGKT
- Part No.:
- REF6250IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REF6250IDGKT.pdf
- Description:
- IC VREF SERIES 0.05% 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
REF6250IDGKT from Texas Instruments is a high-precision, 5-V voltage reference IC with integrated ADC drive buffer, ±3 ppm/°C max temperature drift (0°C to +70°C), ±0.05% initial accuracy, and <50 mΩ output impedance (DC–200 kHz). It delivers ±3 mA output current and drives the REF pin of precision SAR ADCs like ADS8881 with first-sample 18-bit accuracy in burst-mode data acquisition.
For engineers reviewing the REF6250IDGKT datasheet, REF6250IDGKT pinout, REF6250IDGKT application, or REF6250IDGKT equivalent, this page provides verified specifications, functional pin definitions, real-world droop performance data with ADS8881, thermal hysteresis metrics, and validated alternative options for precision analog signal chains.
Technical Context
The REF6250IDGKT integrates a bandgap voltage reference core with a low-output-impedance buffer optimized for dynamic ADC reference loads. Its dual-ground architecture (GND_F/GND_S) separates force and sense paths to minimize PCB trace resistance effects on accuracy.
It features programmable short-circuit current via the SS pin, FILT pin for ≥1 µF stability capacitor, and EN pin for 1 µA shutdown mode. The device maintains ≤1 LSB droop at 1 MSPS when driving ADS8881's REF pin-enabling precise first-sample acquisition in event-triggered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal - precisely matches full-scale range of 5-V SAR ADCs like ADS8881. |
| Temp Drift (0°C to +70°C) | 3 ppm/°C max - ensures ≤1 LSB error over industrial temperature range for 18-bit systems. |
| Initial Accuracy | ±0.05% - enables calibration-free operation in high-end test equipment and medical DAQ. |
| Output Impedance | <50 mΩ (DC–200 kHz) - sustains stable REF voltage during fast capacitor-switching events in SAR ADCs. |
| Total Noise | 5 µVRMS (with 47 µF CL) - supports SNR >100 dB in precision 18-bit data converters. |
| Supply Current | 0.83–0.95 mA active, 1–3 µA shutdown - balances low-noise performance with power-sensitive portable designs. |
| Droop Performance | <1 LSB at 1 MSPS with ADS8881 - guarantees first-conversion accuracy in burst-mode acquisition. |
Pinout & Package
REF6250IDGKT is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained precision PCB layouts with thermal and noise isolation requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies reference core and buffer; requires VIN ≥ VOUT + 0.3 V (min 5.3 V for REF6250). |
| EN | Enable control | Active-high logic input; pulls reference into 1 µA shutdown when low. |
| SS | Short-circuit limit | Resistor-programmable output current limit; open = 10.5 mA max. |
| FILT | Filter capacitor node | Connects ≥1 µF capacitor to GND_F for loop stability and noise reduction. |
| OUT_S | Voltage sense input | Feedback path for remote sensing; connects to ADC REF pin to compensate trace IR drop. |
| OUT_F | Voltage force output | Low-impedance buffered output; drives high-dynamic-load ADC reference inputs directly. |
| GND_F | Force ground | Return path for OUT_F; must be connected near load to minimize ground bounce. |
| GND_S | Sense ground | Return path for OUT_S; ties to system ground at clean reference point for accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ADC drive buffer | Eliminates need for external op-amp; preserves linearity and THD when driving ADS88xx/ADS127xx REF pins. |
| 18-bit first-sample precision | Validated with ADS8881 at 1 MSPS - enables event-triggered and variable-rate DAQ without post-acquisition correction. |
| Dual-ground architecture | Separates force/sense grounds (GND_F/GND_S) to reject PCB trace resistance errors and improve long-term stability. |
| Programmable short-circuit protection | SS pin sets output current limit from 10.5 mA (open) down to user-defined value - protects against REF pin faults. |
| Ultra-low thermal hysteresis | 33 ppm (cycle 1), 8 ppm (cycle 2) - ensures repeatable accuracy after thermal cycling in field-deployed instruments. |
Applications
| ATE Testers | Oscilloscopes |
|---|---|
Use Scenario: High-speed automated test systems capturing transient waveforms at 1+ MSPS with 18-bit resolution. IC Role / Device Role / Timing Role: Supplies ultra-stable 5-V reference to ADS8881 ADCs during burst acquisition triggered by DUT events. Use Value: Guarantees first-sample accuracy within 1 LSB - eliminates need for discard-and-reacquire sequences, improving test throughput. |
Use Scenario: Digital storage oscilloscopes requiring low-noise, high-SNR analog front-ends for 12–16-bit digitizers. IC Role / Device Role / Timing Role: Provides low-impedance, low-droop 5-V reference to wideband ΔΣ or SAR ADCs during single-shot or segmented memory capture. Use Value: Enables >100 dB SNR and –125 dB THD (ADS8881), critical for resolving small-signal harmonics in RF and power electronics analysis. |
| Analog Input Modules | Medical Imaging DAQ |
Use Scenario: PLC analog input cards acquiring sensor data from multiple channels with multiplexed 18-bit ADCs. IC Role / Device Role / Timing Role: Serves as shared reference source for multi-channel SAR ADCs, supporting channel-to-channel coherence in burst mode. Use Value: Maintains ≤1 LSB droop across all channels during simultaneous conversion bursts - ensures accurate differential measurements without per-channel calibration. |
Use Scenario: Portable ultrasound or MRI front-ends where EMI immunity, low noise, and thermal stability are critical. IC Role / Device Role / Timing Role: Delivers 5-V reference to precision ADCs sampling echo signals with sub-microvolt resolution. Use Value: 3 ppm/°C drift and 80 ppm long-term stability (1000 h) ensure diagnostic image fidelity remains consistent across operating temperature shifts and device lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF6245IDGKT | 4.5-V output, same 3 ppm/°C drift, ±3.5 mA drive, slightly higher dropout (250 mV @ 0 mA). | Used where system ADC full-scale is 4.5 V (e.g., ADS8864), not 5 V - requires no circuit redesign but changes reference scaling. | Select when matching 4.5-V ADCs; identical layout, thermal, and noise behavior as REF6250IDGKT. |
| REF6150IDGKT | 5-V output, 8 ppm/°C drift (–40°C to +125°C), no integrated buffer, higher noise (8 µVRMS), requires external op-amp. | Targeted at extended-temp industrial applications where cost sensitivity outweighs 18-bit first-sample requirement. | Choose only if operating beyond 0°C–70°C range and acceptable to add external buffer; not suitable for burst-mode 18-bit DAQ. |
Compared with REF6245IDGKT and REF6150IDGKT, REF6250IDGKT uniquely combines 5-V output, integrated buffer, and ≤1 LSB droop at 1 MSPS - making it the sole option for first-sample-accurate 18-bit burst acquisition in 5-V systems without added components or accuracy trade-offs.
Availability
REF6250IDGKT is available at Aetrix Electronics and suitable for ATE testers, oscilloscopes, and analog input modules requiring stable component supply, guaranteed long-term availability, and TI-qualified production lots.
Supply support for REF6250IDGKT 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 designed specifically to solve dynamic reference loading challenges in high-resolution SAR and delta-sigma ADCs - enabling first-sample accuracy, low noise, and seamless integration into compact, high-performance DAQ systems.
FAQ
What is the maximum load current supported by REF6250IDGKT?
REF6250IDGKT supports ±3 mA continuous output current. This is confirmed in the Electrical Characteristics table under "Load regulation" for REF6250, specifying IL = 0 mA to 3 mA sourcing/sinking. Exceeding this may degrade accuracy or trigger short-circuit limiting via the SS pin configuration.
Does REF6250IDGKT require an external buffer when driving ADS8881?
No - REF6250IDGKT does not require an external buffer when driving ADS8881. Its integrated low-output-impedance buffer (<50 mΩ, DC–200 kHz) is explicitly verified in the datasheet to enable first-sample 18-bit precision with ADS8881 at 1 MSPS, eliminating droop-related errors that occur with standalone references.
What is the recommended capacitor on the FILT pin for REF6250IDGKT?
The FILT pin requires a minimum 1 µF capacitor connected to GND_F. The datasheet specifies CFILT ≥ 1 µF for stability, and typical evaluation uses 1 µF X7R ceramic. Larger values (e.g., 2.2 µF) are acceptable but do not improve performance beyond stability assurance.
How does REF6250IDGKT achieve ≤1 LSB droop with ADS8881?
REF6250IDGKT achieves ≤1 LSB droop (19.07 µV at 18 bits) by combining ultra-low output impedance (<50 mΩ), fast settling, and dual-ground architecture. Measured droop plots (Figures 31–33) confirm <1 LSB error at 1 MSPS under full-scale switching loads - a result of the integrated buffer's bandwidth and charge-delivery capability.
Is REF6250IDGKT pin-compatible with other REF62xx variants like REF6241IDGKT?
Yes - all REF62xx variants including REF6250IDGKT and REF6241IDGKT share identical 8-pin VSSOP (DGK) packaging and pinout. They differ only in output voltage (5.0 V vs. 4.096 V) and minor electrical specs (e.g., dropout, load regulation), allowing direct substitution in layouts where voltage scaling is adjusted.
REF6250IDGKT 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 5.3V ~ 5.5V
- Current - Supply:
- 1.15mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
REF6250IDGKT FAQ
1.How can I place an order for REF6250IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF6250IDGKT 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 REF6250IDGKT reliable?
The price and inventory of REF6250IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF6250IDGKT is usually 5 days.
3.What payment methods are accepted for REF6250IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF6250IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF6250IDGKT?
REF6250IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF6250IDGKT 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 REF6250IDGKT?
For technical support, including REF6250IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF6250IDGKT requirements.
6.How does Aetrix verify that REF6250IDGKT is sourced from the original manufacturer or authorized distributors?
All REF6250IDGKT 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 REF6250IDGKT meets industry standards.
7.What is the process for return or replacement of REF6250IDGKT?
All REF6250IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with REF6250IDGKT, 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 REF6250IDGKT part is unused and in its original packaging.
Return procedure for REF6250IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF6250IDGKT Tags
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