REF3325AIDCKT: Precision 2.5V Voltage Reference IC by Texas Instruments | Features & Applications
REF3325AIDCKT: Texas Instruments' Ultra-Precise 2.5V Series Voltage Reference IC
In the realm of precision electronics, the REF3325AIDCKT from Texas Instruments emerges as a benchmark for accuracy and reliability. This comprehensive guide delves into why engineers globally trust this PMIC (Power Management Integrated Circuit) voltage reference for mission-critical applications.
In-Depth Technical Specifications
Unmatched Precision Performance
- Output Voltage: 2.5V 0.15% (max initial error)
- Temperature Drift: 30ppm/ C (typ) across -40 C to +125 C
- Long-Term Stability: 50ppm/1000hr (industry-leading for SC-70 packages)
Power Efficiency Redefined
- Quiescent Current: 8.5 A (enables years of battery life)
- Input Voltage Range: 2.7V to 5.5V (compatible with 3V/5V systems)
- Load Regulation: 0.01%/mA (maintains stability under dynamic loads)
Advanced Noise Suppression
- Noise Performance: 70 Vp-p (0.1Hz to 10Hz band)
- PSRR: 80dB at DC (excellent power supply rejection)
Package & Environmental Robustness
The SC-70-3 (SOT-323) package features:
- 1.8mm 2.0mm footprint (60% smaller than SOT-23)
- MSL-1 moisture sensitivity (ideal for automated assembly)
- Pb-free and RoHS compliant
Comparative Advantages Over Competing ICs
| Parameter | REF3325AIDCKT | Typical Competitor |
|---|---|---|
| Initial Accuracy | 0.15% | 0.5% |
| Temp Coefficient | 30ppm/ C | 50ppm/ C |
| Operating Current | 8.5 A | 25 A |
Application-Specific Implementation Guides
For Data Acquisition Systems
When used as ADC reference in 16-bit systems:
- Place within 5mm of converter
- Use 1 F X7R ceramic bypass capacitor
- Route reference traces separately from digital signals
Battery-Powered Designs
In IoT sensor nodes:
- Enables 10+ year operation on coin cell
- Wake-up stability achieved in 50 s
- 0.1% accuracy maintained down to 2.7V input
Designer's Checklist
- [ ] Verify thermal vias for high ambient temp operation
- [ ] Select output capacitor per ESR guidelines (10 max)
- [ ] Consider REF3330 (3.0V) for 3.3V systems
Where to Buy & Technical Support
Available through authorized distributors:
- Digi-Key: Stock #296-REF3325AIDCKTTR-ND
- Mouser: 595-REF3325AIDCKT
Access TI's datasheet and evaluation module for prototyping support.
Conclusion: Why REF3325AIDCKT Leads the Market
Combining nano-amp current consumption with sub-0.2% accuracy in a sub-2mm package, the REF3325AIDCKT delivers unparalleled performance density. Its 30ppm/ C stability exceeds military-grade requirements while costing less than precision competitors. For designs where every microvolt and microamp matters, this voltage reference IC stands as the engineer's first choice.