Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Output | 5.0 V precision reference |
| Input Supply | 8 V to 40 V |
| Initial Accuracy | ±0.2% maximum stated for REF02 family grade |
| Temperature Drift | 10 ppm/°C maximum stated |
| Noise | 10 µVpp maximum, 0.1 Hz to 10 Hz stated |
| Supply Current | 1.4 mA maximum stated |
| Trim | External output adjustment approximately ±6% |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large reel; marking REF 02AU |
Product Overview
REF02AU/2K5 is a classic 5 V series voltage reference for systems with relatively high supply rails. It accepts 8–40 V input, making it practical in industrial instrumentation where a stable 5 V reference must be derived from 12 V, 24 V or higher analog supplies.
The reference includes a trim function that can adjust output around 5 V without requiring a separate precision regulator. Drift and low-frequency noise, rather than load-current capability, are the main selection parameters for ADC/DAC reference use.
The AU/2K5 exact order code is the industrial SOIC grade supplied on a 2500-piece reel. It should not be confused with other REF02 grades whose initial accuracy/drift differ.
For related devices, see HKEQGOO’s Voltage References category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | REF02AU/2K5 |
| Output | 5.0 V precision reference |
| Input Supply | 8 V to 40 V |
| Initial Accuracy | ±0.2% maximum stated for REF02 family grade |
| Temperature Drift | 10 ppm/°C maximum stated |
| Noise | 10 µVpp maximum, 0.1 Hz to 10 Hz stated |
| Supply Current | 1.4 mA maximum stated |
| Trim | External output adjustment approximately ±6% |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large reel; marking REF 02AU |
| Manufacturer Status | Active / Production |
| Part Marking | REF 02AU |
Functional Highlights
Wide input range suits legacy and industrial analog rails
A 24 V system can generate a precision 5 V reference directly without a preregulator solely for input-voltage compatibility.
Trim can remove system gain error
Factory calibration can adjust the reference within its trim range, but trim does not eliminate temperature drift or long-term aging.
Design Considerations
- Budget reference self-heating when operating from high VIN because the device dissipates input-output voltage times supply/load current.
- Use output decoupling and load conditions recommended for reference stability.
- Treat 10 ppm/°C drift as a temperature-dependent gain term in the full signal chain.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists REF02AU/2K5 as Active / Production; SOIC (D), 8 pins; 2500-piece large tape and reel; −40°C to +85°C; marking REF 02AU.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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