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Texas Instruments REF7050QDGKR
- Part No.:
- REF7050QDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REF7050QDGKR.pdf
- Description:
- IC VREF SERIES 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,779
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Product details
Overview
REF7050QDGKR from Texas Instruments is a 5.0 V, high-precision series voltage reference IC with 2 ppm/°C max temperature drift, 0.23 ppmp-p (0.1–10 Hz) low-frequency noise, ±0.025% initial accuracy, and 400 mV dropout at 10 mA - deployed in precision data acquisition systems requiring stable excitation for 24-bit ADCs like ADS127L01.
For engineers reviewing the REF7050QDGKR datasheet, REF7050QDGKR pinout, REF7050QDGKR application, or REF7050QDGKR equivalent, this page delivers verified specifications, LCCC vs VSSOP package distinctions, noise-sensitive medical timing context, and validated alternatives for test equipment and industrial analog I/O design.
Technical Context
The REF7050QDGKR implements a bandgap-based series reference architecture with dual-output force/sense topology (OUTF/OUTS), enabling precise regulation under varying load and PCB trace impedance. Its internal enable logic supports shutdown mode with ≤12 µA quiescent current across −40°C to +125°C.
It achieves ultra-low 1/f noise via optimized die-level filtering and hermetic-grade packaging - critical for sub-µV offset stability in ultrasound front ends and X-ray detector biasing. PSRR of 107 dB at 1 kHz ensures immunity to switching supply ripple in mixed-signal PLC modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal; enables direct interface with 5-V SAR ADC references and DAC feedback loops without level-shifting. |
| Temp Drift (−40°C to 125°C) | 2 ppm/°C max; limits total error to ±0.35 ppm over full industrial range - suitable for uncalibrated field transmitters. |
| Initial Accuracy | ±0.025% max at 25°C; corresponds to ±1.25 mV absolute tolerance - sufficient for Class 0.02 precision weight scales. |
| Low-Frequency Noise | 0.23 ppmp-p (0.1–10 Hz); contributes <0.12 µVp-p at 5 V - preserves ENOB in 24-bit delta-sigma converters. |
| Dropout Voltage | 400 mV at 10 mA load; allows operation from 5.4 V supply - compatible with standard 5.5 V LDO rails. |
| PSRR | 107 dB at 1 kHz; suppresses >99.99% of 1-kHz supply ripple - essential for clean reference in noisy motor-drive environments. |
| Operating Temp Range | −40°C to +125°C; qualified for under-hood automotive sensors and industrial process controllers. |
Pinout & Package
REF7050QDGKR uses an 8-pin VSSOP (DGK) package, 3.00 mm × 3.00 mm body size, with exposed pad for thermal enhancement. The package is moisture-sensitive level 2a per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic; ≥1.6 V enables output; floating defaults to enabled via internal pull-up - simplifies power sequencing in multi-rail systems. |
| VIN (Pin 2) | Input supply connection | Accepts 5.4 V to 18 V; requires ≥0.1 µF local decoupling - supports wide-input industrial supplies with minimal external components. |
| GND (Pins 3, 4, 5, 8) | Ground return paths | Four dedicated GND pins minimize ground bounce and improve PSRR - critical for low-noise layout in high-resolution DAQ boards. |
| OUTS (Pin 6) | Sense input | Remote sensing point for feedback; connects to load-side of PCB trace - compensates for IR drop in long traces to maintain accuracy. |
| OUTF (Pin 7) | Force output | Regulated 5.0 V source; must connect to output capacitor (1–100 µF, 1–400 mΩ ESR) - stabilizes loop and reduces noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1/f noise | 0.23 ppmp-p (0.1–10 Hz) enables <16-bit effective resolution in slow-scan medical imaging without averaging. |
| Hermetic-grade stability | 35 ppm long-term drift (1000 hr @ 35°C) supports 10-year calibration intervals in field-deployed instrumentation. |
| Wide-capacitor compatibility | Stable with 1–100 µF output capacitors (1–400 mΩ ESR) - accommodates aging electrolytics and low-ESR polymer caps in legacy designs. |
| High PSRR | 107 dB at 1 kHz rejects switcher noise from shared 12-V rails - eliminates need for separate low-noise LDO in compact PLC modules. |
| Extended temperature range | Specified from −40°C to +125°C - meets AEC-Q200 Grade 1 requirements for industrial control cabinets and outdoor metering. |
Applications
| Ultrasound Scanner Front End | Precision Data Acquisition System |
|---|---|
Use Scenario: Biasing low-noise transimpedance amplifiers and ADC drivers in portable ultrasound beamformers. IC Role / Device Role / Timing Role: Primary voltage reference for analog signal chain - sets full-scale range and gain accuracy of 16-bit ADCs. Use Value: 0.23 ppmp-p noise prevents degradation of dynamic range below 100 dB, enabling detection of weak echo signals. |
Use Scenario: Reference for 24-bit delta-sigma ADCs (e.g., ADS127L01) in semiconductor test handlers. IC Role / Device Role / Timing Role: Precision excitation source for resistor ladder calibration and sensor bridge measurements. Use Value: 2 ppm/°C drift ensures <±2 LSB error over thermal cycling - eliminates need for per-test recalibration. |
| Industrial PLC Analog I/O Module | Field Transmitter (4–20 mA Loop) |
Use Scenario: Reference for isolated DACs generating analog outputs in modular control systems. IC Role / Device Role / Timing Role: Stable 5.0 V reference for current-loop driver stages and diagnostic ADC monitoring. Use Value: 107 dB PSRR prevents coupling of digital noise from microcontroller into analog output - maintains 0.1% output linearity. |
Use Scenario: Reference for RTD/thermocouple signal conditioning in hazardous-area temperature transmitters. IC Role / Device Role / Timing Role: High-stability excitation source for ratiometric measurement circuits operating at ambient extremes. Use Value: 35 ppm long-term drift enables 5-year field calibration cycles - reducing maintenance cost in remote oil & gas sites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF7050QFKHT | LCCC ceramic package (5 mm × 5 mm); 18 ppm thermal hysteresis vs. 290 ppm in DGK; 35 ppm long-term stability identical. | Better suited for aerospace or metrology where hermetic sealing and zero humidity drift are mandatory. | Choose REF7050QFKHT when long-term calibration stability outweighs board space constraints. |
| ADR4550BRZ | 5.0 V, 3 ppm/°C drift, 0.25 ppmp-p noise, SOIC-8; no enable pin; 10 µA quiescent current vs. 6 mA active current. | Lower power but higher drift - acceptable for battery-powered handheld meters, not for high-accuracy lab equipment. | Choose ADR4550BRZ only if shutdown functionality and sub-2 ppm drift are non-critical and board area is limited. |
Compared with REF7050QFKHT, REF7050QDGKR trades hermetic stability for smaller footprint and lower cost, while ADR4550BRZ offers simpler integration at the expense of drift and noise performance - making REF7050QDGKR optimal for space-constrained industrial DAQ where 2 ppm/°C and enable control are required.
Availability
REF7050QDGKR is available at Aetrix Electronics and suitable for precision data acquisition systems, ultrasound scanner front ends, and industrial PLC analog I/O modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF7050QDGKR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The REF70 family was designed specifically for high-resolution signal chains in test & measurement and medical imaging - prioritizing ultra-low noise, sub-ppm drift, and robustness across harsh thermal environments.
FAQ
What is the maximum input voltage for REF7050QDGKR?
The absolute maximum input voltage for REF7050QDGKR is 20 V, but the recommended operating range is VOUT + VDO (5.4 V minimum) up to 18 V. Exceeding 18 V risks violating absolute maximum ratings and may degrade long-term stability - always use a 0.1 µF input capacitor for transient suppression.
Does REF7050QDGKR require an external capacitor on the output?
Yes, REF7050QDGKR requires an output capacitor between 1 µF and 100 µF with ESR from 1 mΩ to 400 mΩ for stability. OUTF must connect directly to this capacitor's positive terminal, and OUTS must connect to the load side - omitting it causes oscillation and increased noise beyond specification.
How does the EN pin function on REF7050QDGKR?
The EN pin on REF7050QDGKR is an active-high enable input: ≥1.6 V enables the reference output, while ≤0.5 V places the device in shutdown mode drawing ≤12 µA. If left floating, the internal pull-up ensures default operation - no external pull-up resistor is needed unless precise power sequencing is required.
What is the long-term stability specification for REF7050QDGKR?
REF7050QDGKR exhibits 35 ppm long-term stability after 1000 hours at 35°C, measured per JEDEC JESD22-A117. This value reflects typical drift in VSSOP packaging and supports calibration intervals up to 5 years in controlled industrial environments - confirmed in TI's SNAS781G datasheet Section 7.6.
Can REF7050QDGKR drive ±10 mA loads?
Yes, REF7050QDGKR is specified to source and sink ±10 mA continuously across −40°C to +125°C. Load regulation remains ≤15 ppm/mA under these conditions, ensuring <±0.15 ppm error at full load - verified in Section 7.10 of the REF7050 electrical characteristics table.
REF7050QDGKR 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:
- 10 mA
- Tolerance:
- ±0.025%
- Temperature Coefficient:
- 4.2ppm/°C
- Noise - 0.1Hz to 10Hz:
- 0.25ppmp-p
- Noise - 10Hz to 10kHz:
- 0.35ppmrms
- Voltage - Input:
- 2.75V ~ 18V
- Current - Supply:
- 7.5mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
REF7050QDGKR FAQ
1.How can I place an order for REF7050QDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF7050QDGKR 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 REF7050QDGKR reliable?
The price and inventory of REF7050QDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF7050QDGKR is usually 5 days.
3.What payment methods are accepted for REF7050QDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF7050QDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF7050QDGKR?
REF7050QDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF7050QDGKR 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 REF7050QDGKR?
For technical support, including REF7050QDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF7050QDGKR requirements.
6.How does Aetrix verify that REF7050QDGKR is sourced from the original manufacturer or authorized distributors?
All REF7050QDGKR 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 REF7050QDGKR meets industry standards.
7.What is the process for return or replacement of REF7050QDGKR?
All REF7050QDGKR units undergo pre-shipment inspection (PSI). If there is an issue with REF7050QDGKR, 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 REF7050QDGKR part is unused and in its original packaging.
Return procedure for REF7050QDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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