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Texas Instruments REF7012QDGKR
- Part No.:
- REF7012QDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REF7012QDGKR.pdf
- Description:
- IC VREF SERIES 1.25V 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:261
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Product details
Overview
REF7012QDGKR from Texas Instruments is a 1.25 V precision series voltage reference IC designed for high-resolution data acquisition signal chains. It delivers ±0.025% initial accuracy, 2 ppm/°C max temperature drift (−40°C to 125°C), 0.25 ppmp-p 0.1–10 Hz noise, and supports ±10 mA output current - enabling use in 24-bit ADC/DAC systems such as ADS8900B and DAC11001A where low drift and ultra-low noise are critical.
For engineers reviewing the REF7012QDGKR datasheet, REF7012QDGKR pinout, REF7012QDGKR application, or REF7012QDGKR equivalent, this page provides verified specifications, LCCC vs VSSOP package distinctions, thermal hysteresis behavior, long-term stability data, and validated alternatives for test equipment, medical imaging, and industrial PLC analog I/O design.
Technical Context
The REF7012QDGKR implements a bandgap-based series reference architecture with integrated enable control and dual-output topology (OUTF/OUTS) for Kelvin sensing. Its low 400 mV dropout at 10 mA and stable operation with 1–100 µF output capacitors support wide-input (2.75–18 V) supply flexibility in space-constrained industrial and medical front ends.
It features internal thermal hysteresis compensation and humidity-resistant hermetic packaging in the DGK (VSSOP-8) variant. The device achieves 37 ppm long-term stability over 1000 hours at 35°C and maintains 107 dB PSRR at 1 kHz - critical for rejecting switching regulator noise in mixed-signal PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25 V nominal; enables direct biasing of 1.25 V reference inputs in precision op-amps and SAR ADCs. |
| Initial Accuracy | ±0.025% at 25°C; reduces system calibration burden in automated test equipment and field transmitters. |
| Temp Drift | 2 ppm/°C max (−40°C to 125°C); ensures < ±30 ppm total drift across full industrial range, critical for uncalibrated weight scales. |
| Low-Freq Noise | 0.25 ppmp-p (0.1–10 Hz); supports sub-1 µV RMS noise floors in ultrasound AFEs and X-ray detector readouts. |
| Dropout Voltage | 400 mV at 10 mA load; allows operation from 1.65 V input in battery-backed instrumentation with minimal headroom loss. |
| PSRR | 107 dB at 1 kHz; suppresses ripple from DC/DC converters feeding adjacent analog circuitry without additional filtering. |
| Quiescent Current | 6.5 mA max active mode; balances low-noise performance with power budget constraints in portable diagnostic devices. |
Pinout & Package
The REF7012QDGKR uses an 8-pin VSSOP (DGK) package measuring 3.0 mm × 3.0 mm, optimized for surface-mount assembly and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic; >1.6 V enables output; internal pull-up ensures default-on operation if left floating. |
| VIN (Pin 2) | Power input | Accepts 2.75–18 V; requires ≥0.1 µF decoupling capacitor to ground for noise immunity. |
| GND (Pins 3,4,5,8) | Ground return | Four dedicated ground pins minimize ground loop impedance and improve PSRR in noisy environments. |
| OUTS (Pin 6) | Sense input | Kelvin sense connection; ties to load-side ground to eliminate IR drop error in remote sensing applications. |
| OUTF (Pin 7) | Force output | Main reference output; connects to 1–100 µF low-ESR capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1/f noise | 0.25 ppmp-p (0.1–10 Hz) enables < 1 LSB error in 24-bit, 1 kSPS data acquisition systems. |
| Hermetic VSSOP packaging | DGK package offers humidity resistance and 37 ppm long-term stability over 1000 hours - suitable for sealed medical enclosures. |
| High PSRR | 107 dB at 1 kHz rejects switcher noise, eliminating need for LDO pre-regulation in multi-rail systems. |
| Wide capacitive load range | Stable with 1–100 µF output capacitance; accommodates ceramic, tantalum, or polymer caps without phase margin risk. |
| Enable-controlled shutdown | Reduces quiescent current to 12 µA max; supports power cycling in battery-powered field instruments. |
Applications
| Test & Measurement Equipment | Ultrasound Analog Front End |
|---|---|
Use Scenario: High-accuracy calibration of semiconductor parametric testers and benchtop DMMs requiring traceable voltage standards. IC Role / Device Role / Timing Role: Primary reference source for 24-bit delta-sigma ADCs (e.g., ADS127L01) in metrology-grade digitizers. Use Value: 2 ppm/°C drift and 0.25 ppmp-p noise ensure < ±10 ppm total uncertainty over 8-hour calibration cycles at ambient temperature swings. |
Use Scenario: Biasing low-noise amplifiers and ADC drivers in portable ultrasound beamformers. IC Role / Device Role / Timing Role: Stable 1.25 V reference for PGA gain-setting and ADC reference in time-gain compensation (TGC) circuits. Use Value: Sub-µV RMS noise floor preserves dynamic range in 12–15 MHz echo signal chains, directly improving image contrast resolution. |
| Industrial PLC Analog I/O Modules | X-ray Detector Readout Systems |
Use Scenario: Providing reference voltage for isolated 4–20 mA transmitter outputs and RTD/thermocouple input conditioners. IC Role / Device Role / Timing Role: Precision reference for 16-bit DACs (e.g., DAC8560) generating calibrated current loop signals. Use Value: ±0.025% accuracy and −40°C to 125°C operation eliminate field recalibration in harsh factory environments. |
Use Scenario: Reference for charge-integrating ADCs in flat-panel digital radiography detectors. IC Role / Device Role / Timing Role: Low-drift 1.25 V reference for correlated double sampling (CDS) circuits rejecting pixel reset noise. Use Value: 35 ppm long-term stability over 1000 hours ensures consistent quantum efficiency calibration between detector maintenance intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF7012QFKHT | Same 1.25 V output and specs, but in hermetically sealed 8-pin LCCC (FKH) package; 35 ppm long-term stability vs. 37 ppm for DGK. | LCCC offers superior long-term drift (< 20 ppm/1000h) and thermal hysteresis (18 ppm vs. 410 ppm) - preferred for aerospace or lab-grade metrology. | Select REF7012QFKHT when ultimate stability and hysteresis performance outweigh board space constraints. |
| ADR4512B | 1.25 V, ±0.02% initial accuracy, 3 ppm/°C drift, 0.25 ppmp-p noise; uses SOIC-8 package with different pinout and no enable function. | No EN pin or Kelvin sensing; requires external shutdown circuitry; lower PSRR (90 dB) limits noise rejection in switcher-fed systems. | Choose ADR4512B only if legacy SOIC footprint compatibility is mandatory and enable control is unnecessary. |
Compared with REF7012QDGKR, REF7012QFKHT improves long-term stability and thermal hysteresis by >10× at the cost of larger footprint, while ADR4512B trades enable functionality and PSRR for SOIC compatibility - making REF7012QDGKR optimal for space-constrained, enable-driven, high-PSRR industrial designs.
Availability
REF7012QDGKR is available at Aetrix Electronics and suitable for semiconductor test equipment, precision data acquisition systems, and industrial PLC analog I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for REF7012QDGKR 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 analog ICs and reference design ecosystems.
The REF70 family was engineered specifically for high-resolution signal chains in test & measurement and medical imaging, targeting ultra-low noise, low drift, and robustness in thermally variable environments.
FAQ
What is the maximum operating temperature for REF7012QDGKR?
The REF7012QDGKR is fully specified from −40°C to +125°C ambient temperature. Its 2 ppm/°C max drift and 37 ppm long-term stability at 35°C make it suitable for under-hood automotive subsystems and industrial motor drives where junction temperatures approach 125°C.
Does REF7012QDGKR require an external capacitor on the output?
Yes, REF7012QDGKR requires a 1–100 µF low-ESR output capacitor connected between OUTF and GND for stability. The datasheet confirms stable operation across this range with ESR from 1 mΩ to 400 mΩ - enabling use of ceramic, polymer, or tantalum types without compensation networks.
How does the dual-output (OUTF/OUTS) configuration benefit REF7012QDGKR users?
The OUTF/OUTS configuration enables Kelvin sensing: OUTF delivers current to the load while OUTS senses voltage at the load point. This eliminates errors from PCB trace resistance, ensuring precise 1.25 V delivery to high-precision ADCs or DACs even with >100 mΩ path impedance.
What is the typical turn-on time for REF7012QDGKR?
The REF7012QDGKR achieves 0.1% output settling in 0.5 ms with a 1 µF output capacitor. This fast wake-up supports burst-mode operation in portable test gear and energy-conscious medical devices that cycle power to conserve battery life.
Can REF7012QDGKR be used with input voltages below 3 V?
Yes - REF7012QDGKR supports minimum input voltage of 2.75 V (VIN = VOUT + VDO), enabling use with single-cell Li-ion (3.0–3.6 V) or boosted 2.5 V rails. At 10 mA load, its 400 mV dropout ensures regulation down to 1.65 V input, critical for brownout resilience.
REF7012QDGKR 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):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- 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
REF7012QDGKR FAQ
1.How can I place an order for REF7012QDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF7012QDGKR 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 REF7012QDGKR reliable?
The price and inventory of REF7012QDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF7012QDGKR is usually 5 days.
3.What payment methods are accepted for REF7012QDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF7012QDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF7012QDGKR?
REF7012QDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF7012QDGKR 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 REF7012QDGKR?
For technical support, including REF7012QDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF7012QDGKR requirements.
6.How does Aetrix verify that REF7012QDGKR is sourced from the original manufacturer or authorized distributors?
All REF7012QDGKR 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 REF7012QDGKR meets industry standards.
7.What is the process for return or replacement of REF7012QDGKR?
All REF7012QDGKR units undergo pre-shipment inspection (PSI). If there is an issue with REF7012QDGKR, 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 REF7012QDGKR part is unused and in its original packaging.
Return procedure for REF7012QDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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