TPR1025
High-precision 2.5V voltage reference with 0.1% initial accuracy, 10ppm/°C drift, low noise for precision measurement.
Product Overview
Description
The TPR1025 is a high-precision 2.5V voltage reference designed for precision measurement and data conversion applications.
It offers excellent initial accuracy of 0.1% and low temperature drift of 10ppm/°C, ensuring stable reference voltage over temperature and time.
With low output noise and good line/load regulation, it is ideal for ADC/DAC reference inputs and sensor excitation.
Product Series
TPR
Primary Application
ADC and DAC reference
Key Features
- High initial accuracy: ±0.1%
- Low temperature drift: 10ppm/°C
- Low output noise: 4μVp-p
- Wide operating range: 2.7V to 5.5V
- No external capacitor required
- AEC-Q100 qualified
Specifications
| Output Voltage | 2.5V |
|---|---|
| Initial Accuracy | ±0.1% max |
| Temperature Drift | 10ppm/°C max |
| Output Noise | 4μVp-p (0.1Hz to 10Hz) |
| Line Regulation | 20ppm/V |
| Load Regulation | 50ppm/mA |
| Supply Current | 100μA max |
| Package | SOT23-3, SOIC-8 |
Applications
ADC and DAC reference
Data acquisition and conversion
Sensor excitation
Sensor signal conditioning
Precision measurement
Data acquisition and conversion
Test and calibration equipment
Electronic system design
Medical instruments
Medical electronics
Industrial controls
Industrial automation and control
FAE Expert Insights
"Based on extensive field experience, this product delivers excellent performance across various operating conditions. The design incorporates proven architecture with robust protection features. Customers consistently report high satisfaction with reliability and ease of integration."
The TPR1025 stands out for its reliability and performance in real-world applications.
— Senior FAE Team, BeiLuo
Frequently Asked Questions
Do I need an output capacitor?
The TPR1025 is designed to be stable without an external output capacitor, which saves board space and BOM cost. However, for applications with transient load currents or long output traces, a 0.1μF to 1μF ceramic capacitor can be added for additional stability. The device is stable with any capacitive load.
No capacitor is needed for normal operation. Add 0.1-1μF for long traces or transient loads.
What is the load regulation specification?
The TPR1025 features excellent load regulation of 50ppm/mA typical. This means the output voltage changes by only 50 microvolts per milliamp of load current change. For a 2.5V reference, this is 125μV/mA. Good load regulation ensures stable reference voltage even as ADC reference input current varies during conversion.
50ppm/mA load regulation excellent for ADC references. Ensure adequate drive capability for your load.
How does temperature affect reference accuracy?
Temperature affects reference voltage through the temperature coefficient (drift). TPR1025 has 10ppm/°C max drift. Over industrial temperature range (-40°C to +85°C, 125°C span): Total drift = 10ppm/°C × 125°C = 1250ppm = 0.125%. For 2.5V reference, this is ±3.125mV variation. Combined with initial accuracy (0.1%), total error is approximately 0.225% over temperature.
Calculate total error from initial accuracy plus temperature drift. 10ppm/°C suitable for most applications.
What is the noise performance?
The TPR1025 features low output noise of 4μVp-p (0.1Hz to 10Hz bandwidth). This low-frequency noise is important for DC measurement applications. For wideband noise, the spectral density is typically 50nV/√Hz. Low noise is critical for high-resolution ADCs where reference noise can limit overall system performance. For 16-bit ADC with 2.5V reference, 1 LSB = 38μV, so reference noise should be well below this.
4μVp-p noise excellent for 16-bit ADCs. Noise well below 1 LSB for TPC1610.
Can I use TPR1025 for ratiometric measurements?
Yes, TPR1025 is excellent for ratiometric measurement applications. In ratiometric configurations, the same reference voltage excites the sensor and provides ADC reference. This cancels out reference voltage errors since both sensor output and ADC range scale together. Common applications: Bridge sensors (load cells, pressure sensors), RTD measurements, Potentiometric position sensors. Use TPR1025 for both sensor excitation and ADC reference.
Excellent for ratiometric measurements. Use for bridge sensors and RTD applications.