Overview
The REF1930AIDDCT is a precision voltage reference IC manufactured by Texas Instruments. It is designed for use in precision analog circuits, data converters, power supplies, and instrumentation. This device features excellent temperature drift performance, high initial accuracy, and low dropout voltage, making it suitable for a wide range of applications that require precise voltage references.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (VREF) | 3.3 | V |
| Initial Accuracy (max) | ±0.1% | % |
| Temperature Coefficient (max) | 25 | ppm/°C |
| Input Voltage Range (VIN) | 3.02 to 5.5 | V |
| Quiescent Current (Iq) (typ) | 0.36 | mA |
| Output Current (Iout/Iz) (max) | 20 | mA |
| Operating Temperature Range | -40 to 125 | °C |
| Shutdown Current (ISD) (typ) | 3.3 | µA |
| Low Frequency Noise (LFN) 0.1 to 10 Hz (typ) | 36 | µVPP |
Key Features
The REF1930AIDDCT offers several key features that make it highly suitable for precision applications:
- Two Outputs, VREF and VBIAS/2: Convenient for use in single-supply systems, providing a reference voltage and a second highly accurate voltage for biasing input bipolar signals.
- Excellent Temperature Drift Performance: 25 ppm/°C (max) from –40°C to 125°C.
- High Initial Accuracy: ±0.1% (max).
- VREF and VBIAS/2 Output Tracking: Maintains a fixed ratio over temperature.
- Low Dropout Voltage: Only 10 mV, allowing operation from very low input voltages, which is useful in battery-operated systems.
- Low Noise and Long-Term Stability: Very good long-term stability and low noise levels, making it ideal for high-precision industrial applications.
Applications
The REF1930AIDDCT is suitable for various applications that require precision voltage references, including:
- Data Converters and Analog-to-Digital Converters (ADCs): Providing a stable voltage reference for ADC input ranges.
- Power Supplies and Voltage Regulators: Ensuring precise voltage regulation in power supply systems.
- Instrumentation and Measurement Systems: Ideal for systems where high accuracy and low noise are critical.
- Industrial and Instrumentation Environments: Suitable for applications that require high accuracy and reliability in industrial settings.
Q & A
- Q: What is the maximum temperature range supported by the REF1930AIDDCT?
A: The REF1930AIDDCT operates from –40°C to 125°C.
- Q: Can the REF1930AIDDCT be used in industrial applications?
A: Yes, it is suitable for industrial applications that require precision voltage references, offering high accuracy and low noise performance.
- Q: What are the key features of the REF1930AIDDCT?
A: It includes two outputs (VREF and VBIAS/2), excellent temperature drift performance, high initial accuracy, and low dropout voltage.
- Q: How does the REF1930AIDDCT work?
A: It generates a precise and stable voltage reference output based on its internal circuitry, maintaining a constant voltage output even under varying conditions of temperature and power supply.
- Q: What is the package type of the REF1930AIDDCT?
A: It is housed in a SOT23-5 package.
- Q: What are the typical applications of the REF1930AIDDCT?
A: It is used in data converters, power supplies, instrumentation, and industrial environments where high precision is required.
- Q: Does the REF1930AIDDCT have any equivalents or alternatives?
A: Yes, alternatives include the REF192 from Texas Instruments and other precision voltage references like the LTZ1000A from Analog Devices and the MAX6126 from Maxim Integrated.
- Q: What is the quiescent current of the REF1930AIDDCT?
A: The quiescent current (Iq) is typically 0.36 mA.
- Q: What is the output current capability of the REF1930AIDDCT?
A: The device can source and sink up to 20 mA per output.
- Q: How does the REF1930AIDDCT handle noise and long-term stability?
A: It provides very good long-term stability and low noise levels, making it ideal for high-precision applications.
