Overview
The REF1925AIDDCR from Texas Instruments is a high-precision, dual-output voltage reference designed to provide stable and accurate voltage references for a variety of applications. This component is particularly useful in systems requiring a reliable and low-drift voltage source, such as in analog-to-digital converters (ADCs), precision instrumentation, and medical devices. The REF1925AIDDCR offers excellent temperature drift performance, high initial accuracy, and low noise levels, making it an ideal choice for high-precision industrial and medical applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage Accuracy | -0.1% | 0.1% | % | |
| Temperature Drift | 25 ppm/°C | ppm/°C | ||
| Operating Temperature Range | -40°C | 125°C | °C | |
| Supply Input Voltage Range | VREF + 0.02 V | 5.5 V | V | |
| Quiescent Current | 430 µA | µA | ||
| Output Current Capability | ±20 mA | mA | ||
| Dropout Voltage | 10 mV | mV | ||
| ESD Rating (HBM) | ±4000 V | V | ||
| ESD Rating (CDM) | ±1500 V | V | ||
| Package Type | 5-Pin TSOT-23 |
Key Features
- High initial accuracy of ±0.1% and excellent temperature drift performance of 25 ppm/°C from -40°C to 125°C.
- Dual output providing both VREF and VREF/2 voltages.
- Low quiescent current of less than 430 µA and low dropout voltage of 10 mV.
- Both VREF and VBIAS outputs can sink and source current equally well.
- High long-term stability and low noise levels.
- Low-power mode with quiescent current reduced to 5 µA when the ENABLE pin is pulled low.
Applications
The REF1925AIDDCR is suitable for a variety of high-precision applications, including:
- Analog-to-digital converters (ADCs) requiring a stable mid-scale voltage reference.
- Precision instrumentation and measurement systems.
- Medical devices where high accuracy and stability are critical.
- Battery-operated systems due to its low dropout voltage and low quiescent current.
- Low-drift, bidirectional current-sensing solutions.
Q & A
- What is the output voltage accuracy of the REF1925AIDDCR?
The output voltage accuracy is ±0.1%. - What is the temperature drift performance of the REF1925AIDDCR?
The temperature drift is 25 ppm/°C from -40°C to 125°C. - What is the operating temperature range of the REF1925AIDDCR?
The operating temperature range is from -40°C to 125°C. - What is the quiescent current of the REF1925AIDDCR?
The quiescent current is less than 430 µA. - Can the REF1925AIDDCR operate in low-power mode?
Yes, the device can be placed in a low-power mode by pulling the ENABLE pin low, reducing the quiescent current to 5 µA. - What are the ESD ratings for the REF1925AIDDCR?
The ESD ratings are ±4000 V for the Human-Body Model (HBM) and ±1500 V for the Charged-Device Model (CDM). - What is the package type of the REF1925AIDDCR?
The package type is 5-Pin TSOT-23. - Can the REF1925AIDDCR be used in battery-operated systems?
Yes, due to its low dropout voltage and low quiescent current, it is suitable for battery-operated systems. - What are the key applications of the REF1925AIDDCR?
The key applications include ADCs, precision instrumentation, medical devices, and low-drift current-sensing solutions. - How does the REF1925AIDDCR handle thermal stress during soldering?
The device can experience output voltage shifts due to thermal stress during soldering, but soldering it in the second pass can minimize this effect.
