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Texas Instruments REF102AU/2K5
- Part No.:
- REF102AU/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF102AU/2K5.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,745
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Product details
Overview
REF102AU/2K5 from Texas Instruments is a precision 10V voltage reference IC with ±10 mV initial accuracy, 2.5 ppm/°C max drift over –25°C to +85°C, and 5 ppm/1000 hr typical stability. It operates from 11.4V to 36V supply, delivers ±10 mA output current, and features low 5 µVPP (0.1–10 Hz) noise - ideal for high-resolution ADC/DAC calibration in test equipment and digital voltmeters.
For engineers reviewing the REF102AU/2K5 datasheet, REF102AU/2K5 pinout, REF102AU/2K5 application, or REF102AU/2K5 equivalent, key selection criteria include initial voltage error tolerance, thermal drift performance across industrial temperature range, load/line regulation specs, noise floor in sub-10Hz band, and SOIC-8 package compatibility with automated assembly.
Technical Context
The REF102AU/2K5 uses a laser-trimmed buried zener diode with op-amp feedback and precision resistor network (R1–R6) to achieve stable 10V output without heater-based compensation. Its drift specification follows the box method over –25°C to +85°C, with trim-adjustable output (±3% range) that minimally impacts drift due to matched TCR resistors.
It integrates a dedicated Noise Reduction pin (Pin 5) enabling external RC filtering to suppress zener high-frequency noise; with 1 µF capacitor, broadband noise drops from ~800 µVPP to <200 µVPP. Absolute maximum input voltage is +40V, and it includes continuous short-circuit protection to common or V+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000 V ±10 mV at +25°C - sets absolute accuracy baseline for system-level calibration. |
| Temp Drift | 2.5 ppm/°C max over –25°C to +85°C - ensures ≤0.275 mV total drift across full operating range. |
| Line Regulation | 1 ppm/V max (11.4–36V) - contributes ≤0.025 mV error from supply variation. |
| Load Regulation | 10 ppm/mA max (0 to +10 mA) - adds ≤0.1 mV error under full positive load. |
| Long-Term Stability | 20 ppm/1000 hr (P/U packages) - predicts ≤0.2 mV drift after 1000 hours of powered operation. |
| Output Noise | 5 µVPP typ (0.1–10 Hz) - enables sub-16-bit effective resolution in precision measurement systems. |
| Quiescent Current | 1.4 mA max - supports low-power instrumentation designs without compromising reference integrity. |
Pinout & Package
REF102AU/2K5 is housed in an SOIC-8 (D) package per JEDEC MS-012 AA, 3.91 mm width, 1.75 mm max height, with gull-wing leads and Pin 1 quadrant Q1 orientation in tape-and-reel packaging (2500 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Noise Reduction | Connects to external capacitor (e.g., 1 µF) to form low-pass filter with internal R6 (7 kΩ), reducing high-frequency zener noise. |
| 2 | V+ | Main power input (11.4–36 VDC); must be decoupled locally to minimize supply noise coupling. |
| 3 | NC | No connection - internally unconnected; leave floating or tie to ground only if required by layout. |
| 4 | Common | Reference ground node; requires low-impedance star-point connection to minimize offset errors. |
| 5 | Trim | Adjusts output voltage ±3% via external potentiometer; TCR-matched design limits added drift to ~0.008 ppm/°C per mV trimmed. |
| 6 | VOUT | Stable 10V output; capable of sourcing +10 mA / sinking –5 mA with minimal regulation error. |
| 7 | NC | No connection - internally unconnected; no routing or grounding required. |
| 8 | NC | No connection - internally unconnected; maintain isolation per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed zener core | Enables ±10 mV initial accuracy and 2.5 ppm/°C drift without heater, reducing warm-up time and power consumption. |
| Dedicated noise reduction pin | Allows configurable RC filtering (e.g., 1 µF + 7 kΩ) to cut broadband noise by >75%, critical for sub-µV measurement front-ends. |
| Wide supply range (11.4–36 V) | Supports direct use with standard industrial rails (e.g., +12V, +15V, +24V) without external regulators or LDOs. |
| Trim-adjustable output | ±3% fine-tuning capability preserves system-level calibration flexibility while adding <0.03 ppm/°C worst-case drift penalty. |
| Continuous short-circuit protection | Withstands indefinite fault conditions on VOUT without degradation - essential for robust test equipment design. |
Applications
| High-Accuracy Data Acquisition | Digital Multimeter Reference |
|---|---|
Use Scenario: 24-bit sigma-delta ADC system requiring <1 ppm linearity and <0.1 LSB offset drift over temperature. IC Role / Device Role / Timing Role: Primary voltage reference for ADC internal PGA and external DAC feedback loop. Use Value: 2.5 ppm/°C drift and 5 µVPP low-frequency noise directly enable <0.001% full-scale accuracy over –25°C to +85°C. | Use Scenario: Portable handheld DMM with autoranging, 6½-digit display, and battery-powered operation. IC Role / Device Role / Timing Role: Stable 10V reference for dual-slope integrator and ADC reference ladder. Use Value: 1.4 mA quiescent current and 11.4V minimum supply allow direct use from single Li-ion cell (3.0–4.2V) with boost converter, minimizing BOM count. |
| Automated Test Equipment (ATE) | Calibration Standard Module |
Use Scenario: Rack-mounted ATE channel card generating programmable precision voltages for DUT stimulus. IC Role / Device Role / Timing Role: Master reference for DAC-controlled voltage sources and comparator threshold generation. Use Value: 1 ppm/V line regulation and 10 ppm/mA load regulation ensure <0.01% output error across varying load and supply conditions during dynamic testing. | Use Scenario: Benchtop calibration standard used to verify multimeters, calibrators, and sensor transmitters. IC Role / Device Role / Timing Role: Primary 10V artifact reference traceable to NIST via long-term stability metrics. Use Value: 20 ppm/1000 hr stability (after 168-hr burn-in) supports annual recalibration intervals with documented drift budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF102CU/2K5 | ±2.5 mV initial error (vs ±10 mV), same SOIC-8 package and 2.5 ppm/°C drift spec. | Required where tighter initial accuracy is mandatory (e.g., metrology-grade calibration standards). | Select REF102CU/2K5 when initial error budget demands <±0.025% instead of <±0.1%. |
| ADR441BRZ | 10V output, ±3 mV initial error, 1.5 ppm/°C max drift, but higher 1.8 mA quiescent current and 12V min supply. | Better drift performance but incompatible with 11.4V supplies; requires redesign of power stage. | Choose ADR441BRZ only if drift is primary constraint and supply can be raised to ≥12V. |
Compared with REF102AU/2K5, REF102CU/2K5 offers fourfold better initial accuracy at identical drift and noise, while ADR441BRZ improves drift by 40% but sacrifices supply voltage flexibility and increases power draw - making REF102AU/2K5 optimal for cost-sensitive industrial instrumentation where ±0.1% initial tolerance is acceptable.
Availability
REF102AU/2K5 is available at Aetrix Electronics and suitable for high-accuracy data acquisition, digital multimeter reference, and automated test equipment requiring stable component supply with full traceability and long-lifecycle support.
Supply support for REF102AU/2K5 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, embedded processing, and high-reliability components, with decades of expertise in precision analog signal chains.
The REF102 product line was engineered specifically for instrumentation-grade voltage references - prioritizing ultra-low drift, exceptional long-term stability, and low-noise operation in demanding metrology and test applications.
FAQ
What is the initial output voltage tolerance of the REF102AU/2K5?
The REF102AU/2K5 has a maximum initial output voltage error of ±10 mV at +25°C, corresponding to a 10.000 V ±0.1% specification. This tolerance is guaranteed across all units and forms the baseline accuracy before temperature, load, or time-induced deviations are considered. The REF102AU/2K5 achieves this via laser trimming of its internal resistor network and buried zener diode.
Does the REF102AU/2K5 require external capacitors for stability?
Yes - the REF102AU/2K5 requires a minimum 1 µF tantalum capacitor between V+ and Common (Pin 2 to Pin 4) for input decoupling, and a 1 µF capacitor between the Noise Reduction pin (Pin 1) and ground to suppress high-frequency zener noise. These capacitors are explicitly specified in the TI datasheet SBVS022B for achieving rated noise and transient performance. Omitting them degrades both noise and power-turn-on response.
Can the REF102AU/2K5 operate from a 12V supply?
Yes - the REF102AU/2K5 supports supply voltages from +11.4 VDC to +36 VDC, so a nominal 12V rail is fully within specification. At 12V, it maintains full performance: 2.5 ppm/°C drift, 1 ppm/V line regulation, and 5 µVPP (0.1–10 Hz) noise remain valid. Ensure input ripple is <10 mVpp and local decoupling (1 µF tantalum) is placed within 5 mm of Pins 2 and 4.
What is the maximum output current capability of the REF102AU/2K5?
The REF102AU/2K5 can source up to +10 mA and sink up to –5 mA while maintaining specified load regulation (10 ppm/mA max). Exceeding these limits risks violating the 10 ppm/mA spec and may cause thermal drift or instability. For loads >10 mA, TI recommends using an external buffer amplifier such as the OPA227, as shown in Figure 7a of SBVS022B.
Is the REF102AU/2K5 RoHS compliant and lead-free?
Yes - the REF102AU/2K5 is RoHS compliant with NIPDAU (nickel-palladium-gold) lead finish, per TI's Package Option Addendum. It carries MSL Level-2 rating (260°C peak reflow, 1-year floor life) and is qualified for lead-free soldering processes. The part marking "REF 102U A" appears on the top surface, confirming full compliance with EU RoHS Directive 2011/65/EU and TI's environmental policies.
REF102AU/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 5µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 11.4V ~ 36V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF102AU/2K5 FAQ
1.How can I place an order for REF102AU/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF102AU/2K5 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 REF102AU/2K5 reliable?
The price and inventory of REF102AU/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF102AU/2K5 is usually 5 days.
3.What payment methods are accepted for REF102AU/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF102AU/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF102AU/2K5?
REF102AU/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF102AU/2K5 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 REF102AU/2K5?
For technical support, including REF102AU/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF102AU/2K5 requirements.
6.How does Aetrix verify that REF102AU/2K5 is sourced from the original manufacturer or authorized distributors?
All REF102AU/2K5 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 REF102AU/2K5 meets industry standards.
7.What is the process for return or replacement of REF102AU/2K5?
All REF102AU/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with REF102AU/2K5, 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 REF102AU/2K5 part is unused and in its original packaging.
Return procedure for REF102AU/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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